Updates for SRU Update by Ko van der Sloot:
[yaz-moved-to-github.git] / src / seshigh.c
1 /*
2  * Copyright (C) 1995-2005, Index Data ApS
3  * See the file LICENSE for details.
4  *
5  * $Id: seshigh.c,v 1.103 2006-10-27 11:22:09 adam Exp $
6  */
7 /**
8  * \file seshigh.c
9  * \brief Implements GFS session logic.
10  *
11  * Frontend server logic.
12  *
13  * This code receives incoming APDUs, and handles client requests by means
14  * of the backend API.
15  *
16  * Some of the code is getting quite involved, compared to simpler servers -
17  * primarily because it is asynchronous both in the communication with
18  * the user and the backend. We think the complexity will pay off in
19  * the form of greater flexibility when more asynchronous facilities
20  * are implemented.
21  *
22  * Memory management has become somewhat involved. In the simple case, where
23  * only one PDU is pending at a time, it will simply reuse the same memory,
24  * once it has found its working size. When we enable multiple concurrent
25  * operations, perhaps even with multiple parallel calls to the backend, it
26  * will maintain a pool of buffers for encoding and decoding, trying to
27  * minimize memory allocation/deallocation during normal operation.
28  *
29  */
30
31 #include <stdlib.h>
32 #include <stdio.h>
33 #include <assert.h>
34 #include <ctype.h>
35
36 #if HAVE_SYS_TYPES_H
37 #include <sys/types.h>
38 #endif
39 #if HAVE_SYS_STAT_H
40 #include <sys/stat.h>
41 #endif
42
43 #ifdef WIN32
44 #include <io.h>
45 #define S_ISREG(x) (x & _S_IFREG)
46 #include <process.h>
47 #endif
48
49 #if HAVE_UNISTD_H
50 #include <unistd.h>
51 #endif
52
53 #if YAZ_HAVE_XML2
54 #include <libxml/parser.h>
55 #include <libxml/tree.h>
56 #endif
57
58 #include <yaz/yconfig.h>
59 #include <yaz/xmalloc.h>
60 #include <yaz/comstack.h>
61 #include "eventl.h"
62 #include "session.h"
63 #include "mime.h"
64 #include <yaz/proto.h>
65 #include <yaz/oid.h>
66 #include <yaz/log.h>
67 #include <yaz/logrpn.h>
68 #include <yaz/querytowrbuf.h>
69 #include <yaz/statserv.h>
70 #include <yaz/diagbib1.h>
71 #include <yaz/charneg.h>
72 #include <yaz/otherinfo.h>
73 #include <yaz/yaz-util.h>
74 #include <yaz/pquery.h>
75
76 #include <yaz/srw.h>
77 #include <yaz/backend.h>
78
79 static void process_gdu_request(association *assoc, request *req);
80 static int process_z_request(association *assoc, request *req, char **msg);
81 void backend_response(IOCHAN i, int event);
82 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
83 static int process_z_response(association *assoc, request *req, Z_APDU *res);
84 static Z_APDU *process_initRequest(association *assoc, request *reqb);
85 static Z_External *init_diagnostics(ODR odr, int errcode,
86                                     const char *errstring);
87 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
88     int *fd);
89 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
90     bend_search_rr *bsrr, int *fd);
91 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
92     int *fd);
93 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
94 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
95 static void process_close(association *assoc, request *reqb);
96 void save_referenceId (request *reqb, Z_ReferenceId *refid);
97 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
98     int *fd);
99 static Z_APDU *process_segmentRequest (association *assoc, request *reqb);
100
101 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
102
103 /* dynamic logging levels */
104 static int logbits_set = 0;
105 static int log_session = 0; /* one-line logs for session */
106 static int log_sessiondetail = 0; /* more detailed stuff */
107 static int log_request = 0; /* one-line logs for requests */
108 static int log_requestdetail = 0;  /* more detailed stuff */
109
110 /** get_logbits sets global loglevel bits */
111 static void get_logbits(void)
112 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
113     if (!logbits_set)
114     {
115         logbits_set = 1;
116         log_session = yaz_log_module_level("session"); 
117         log_sessiondetail = yaz_log_module_level("sessiondetail");
118         log_request = yaz_log_module_level("request");
119         log_requestdetail = yaz_log_module_level("requestdetail"); 
120     }
121 }
122
123
124
125 static void wr_diag(WRBUF w, int error, const char *addinfo)
126 {
127     wrbuf_printf(w, "ERROR %d+", error);
128     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
129     if (addinfo){
130         wrbuf_puts(w, "+");
131         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
132     }
133     
134     wrbuf_puts(w, " ");    
135 }
136
137
138 /*
139  * Create and initialize a new association-handle.
140  *  channel  : iochannel for the current line.
141  *  link     : communications channel.
142  * Returns: 0 or a new association handle.
143  */
144 association *create_association(IOCHAN channel, COMSTACK link,
145                                 const char *apdufile)
146 {
147     association *anew;
148
149     if (!logbits_set)
150         get_logbits();
151     if (!(anew = (association *)xmalloc(sizeof(*anew))))
152         return 0;
153     anew->init = 0;
154     anew->version = 0;
155     anew->last_control = 0;
156     anew->client_chan = channel;
157     anew->client_link = link;
158     anew->cs_get_mask = 0;
159     anew->cs_put_mask = 0;
160     anew->cs_accept_mask = 0;
161     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
162         !(anew->encode = odr_createmem(ODR_ENCODE)))
163         return 0;
164     if (apdufile && *apdufile)
165     {
166         FILE *f;
167
168         if (!(anew->print = odr_createmem(ODR_PRINT)))
169             return 0;
170         if (*apdufile == '@')
171         {
172             odr_setprint(anew->print, yaz_log_file());
173         }       
174         else if (*apdufile != '-')
175         {
176             char filename[256];
177             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
178             if (!(f = fopen(filename, "w")))
179             {
180                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
181                 return 0;
182             }
183             setvbuf(f, 0, _IONBF, 0);
184             odr_setprint(anew->print, f);
185         }
186     }
187     else
188         anew->print = 0;
189     anew->input_buffer = 0;
190     anew->input_buffer_len = 0;
191     anew->backend = 0;
192     anew->state = ASSOC_NEW;
193     request_initq(&anew->incoming);
194     request_initq(&anew->outgoing);
195     anew->proto = cs_getproto(link);
196     anew->server = 0;
197     return anew;
198 }
199
200 /*
201  * Free association and release resources.
202  */
203 void destroy_association(association *h)
204 {
205     statserv_options_block *cb = statserv_getcontrol();
206     request *req;
207
208     xfree(h->init);
209     odr_destroy(h->decode);
210     odr_destroy(h->encode);
211     if (h->print)
212         odr_destroy(h->print);
213     if (h->input_buffer)
214     xfree(h->input_buffer);
215     if (h->backend)
216         (*cb->bend_close)(h->backend);
217     while ((req = request_deq(&h->incoming)))
218         request_release(req);
219     while ((req = request_deq(&h->outgoing)))
220         request_release(req);
221     request_delq(&h->incoming);
222     request_delq(&h->outgoing);
223     xfree(h);
224     xmalloc_trav("session closed");
225     if (cb && cb->one_shot)
226     {
227         exit (0);
228     }
229 }
230
231 static void do_close_req(association *a, int reason, char *message,
232                          request *req)
233 {
234     Z_APDU apdu;
235     Z_Close *cls = zget_Close(a->encode);
236     
237     /* Purge request queue */
238     while (request_deq(&a->incoming));
239     while (request_deq(&a->outgoing));
240     if (a->version >= 3)
241     {
242         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
243             reason, message ? message : "none");
244         apdu.which = Z_APDU_close;
245         apdu.u.close = cls;
246         *cls->closeReason = reason;
247         cls->diagnosticInformation = message;
248         process_z_response(a, req, &apdu);
249         iochan_settimeout(a->client_chan, 20);
250     }
251     else
252     {
253         request_release(req);
254         yaz_log(log_requestdetail, "v2 client. No Close PDU");
255         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
256         a->cs_put_mask = 0;
257     }
258     a->state = ASSOC_DEAD;
259 }
260
261 static void do_close(association *a, int reason, char *message)
262 {
263     request *req = request_get(&a->outgoing);
264     do_close_req (a, reason, message, req);
265 }
266
267 /*
268  * This is where PDUs from the client are read and the further
269  * processing is initiated. Flow of control moves down through the
270  * various process_* functions below, until the encoded result comes back up
271  * to the output handler in here.
272  * 
273  *  h     : the I/O channel that has an outstanding event.
274  *  event : the current outstanding event.
275  */
276 void ir_session(IOCHAN h, int event)
277 {
278     int res;
279     association *assoc = (association *)iochan_getdata(h);
280     COMSTACK conn = assoc->client_link;
281     request *req;
282
283     assert(h && conn && assoc);
284     if (event == EVENT_TIMEOUT)
285     {
286         if (assoc->state != ASSOC_UP)
287         {
288             yaz_log(YLOG_DEBUG, "Final timeout - closing connection.");
289             /* do we need to lod this at all */
290             cs_close(conn);
291             destroy_association(assoc);
292             iochan_destroy(h);
293         }
294         else
295         {
296             yaz_log(log_sessiondetail, 
297                     "Session idle too long. Sending close.");
298             do_close(assoc, Z_Close_lackOfActivity, 0);
299         }
300         return;
301     }
302     if (event & assoc->cs_accept_mask)
303     {
304         if (!cs_accept (conn))
305         {
306             yaz_log (YLOG_WARN, "accept failed");
307             destroy_association(assoc);
308             iochan_destroy(h);
309         }
310         iochan_clearflag (h, EVENT_OUTPUT);
311         if (conn->io_pending) 
312         {   /* cs_accept didn't complete */
313             assoc->cs_accept_mask = 
314                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
315                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
316
317             iochan_setflag (h, assoc->cs_accept_mask);
318         }
319         else
320         {   /* cs_accept completed. Prepare for reading (cs_get) */
321             assoc->cs_accept_mask = 0;
322             assoc->cs_get_mask = EVENT_INPUT;
323             iochan_setflag (h, assoc->cs_get_mask);
324         }
325         return;
326     }
327     if ((event & assoc->cs_get_mask) || (event & EVENT_WORK)) /* input */
328     {
329         if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
330         {
331             yaz_log(YLOG_DEBUG, "ir_session (input)");
332             /* We aren't speaking to this fellow */
333             if (assoc->state == ASSOC_DEAD)
334             {
335                 yaz_log(log_sessiondetail, "Connection closed - end of session");
336                 cs_close(conn);
337                 destroy_association(assoc);
338                 iochan_destroy(h);
339                 return;
340             }
341             assoc->cs_get_mask = EVENT_INPUT;
342             res = cs_get(conn, &assoc->input_buffer,
343                 &assoc->input_buffer_len);
344             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
345             {
346                 yaz_log(log_session, "Connection error: %s res=%d",
347                         cs_errmsg(cs_errno(conn)), res);
348                 req = request_get(&assoc->incoming); /* get a new request */
349                 do_close_req(assoc, Z_Close_protocolError, 
350                              "Incoming package too large", req);
351                 return;
352             }
353             else if (res <= 0)
354             {
355                 yaz_log(log_sessiondetail, "Connection closed by client");
356                 cs_close(conn);
357                 destroy_association(assoc);
358                 iochan_destroy(h);
359                 return;
360             }
361             else if (res == 1) /* incomplete read - wait for more  */
362             {
363                 if (conn->io_pending & CS_WANT_WRITE)
364                     assoc->cs_get_mask |= EVENT_OUTPUT;
365                 iochan_setflag(h, assoc->cs_get_mask);
366                 return;
367             }
368             if (cs_more(conn)) /* more stuff - call us again later, please */
369                 iochan_setevent(h, EVENT_INPUT);
370                 
371             /* we got a complete PDU. Let's decode it */
372             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
373                             assoc->input_buffer[0] & 0xff,
374                             assoc->input_buffer[1] & 0xff,
375                             assoc->input_buffer[2] & 0xff);
376             req = request_get(&assoc->incoming); /* get a new request */
377             odr_reset(assoc->decode);
378             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
379             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
380             {
381                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
382                         "[near byte %ld] ",
383                         odr_errmsg(odr_geterror(assoc->decode)),
384                         odr_getelement(assoc->decode),
385                         (long) odr_offset(assoc->decode));
386                 if (assoc->decode->error != OHTTP)
387                 {
388                     yaz_log(YLOG_WARN, "PDU dump:");
389                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
390                     request_release(req);
391                     do_close(assoc, Z_Close_protocolError, "Malformed package");
392                 }
393                 else
394                 {
395                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
396                     assoc->state = ASSOC_DEAD;
397                     process_gdu_response(assoc, req, p);
398                 }
399                 return;
400             }
401             req->request_mem = odr_extract_mem(assoc->decode);
402             if (assoc->print) 
403             {
404                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
405                     yaz_log(YLOG_WARN, "ODR print error: %s", 
406                        odr_errmsg(odr_geterror(assoc->print)));
407                 odr_reset(assoc->print);
408             }
409             request_enq(&assoc->incoming, req);
410         }
411
412         /* can we do something yet? */
413         req = request_head(&assoc->incoming);
414         if (req->state == REQUEST_IDLE)
415         {
416             request_deq(&assoc->incoming);
417             process_gdu_request(assoc, req);
418         }
419     }
420     if (event & assoc->cs_put_mask)
421     {
422         request *req = request_head(&assoc->outgoing);
423
424         assoc->cs_put_mask = 0;
425         yaz_log(YLOG_DEBUG, "ir_session (output)");
426         req->state = REQUEST_PENDING;
427         switch (res = cs_put(conn, req->response, req->len_response))
428         {
429         case -1:
430             yaz_log(log_sessiondetail, "Connection closed by client");
431             cs_close(conn);
432             destroy_association(assoc);
433             iochan_destroy(h);
434             break;
435         case 0: /* all sent - release the request structure */
436             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
437 #if 0
438             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
439                     req->response);
440 #endif
441             nmem_destroy(req->request_mem);
442             request_deq(&assoc->outgoing);
443             request_release(req);
444             if (!request_head(&assoc->outgoing))
445             {   /* restore mask for cs_get operation ... */
446                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
447                 iochan_setflag(h, assoc->cs_get_mask);
448                 if (assoc->state == ASSOC_DEAD)
449                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
450             }
451             else
452             {
453                 assoc->cs_put_mask = EVENT_OUTPUT;
454             }
455             break;
456         default:
457             if (conn->io_pending & CS_WANT_WRITE)
458                 assoc->cs_put_mask |= EVENT_OUTPUT;
459             if (conn->io_pending & CS_WANT_READ)
460                 assoc->cs_put_mask |= EVENT_INPUT;
461             iochan_setflag(h, assoc->cs_put_mask);
462         }
463     }
464     if (event & EVENT_EXCEPT)
465     {
466         yaz_log(YLOG_WARN, "ir_session (exception)");
467         cs_close(conn);
468         destroy_association(assoc);
469         iochan_destroy(h);
470     }
471 }
472
473 static int process_z_request(association *assoc, request *req, char **msg);
474
475
476 static void assoc_init_reset(association *assoc)
477 {
478     xfree (assoc->init);
479     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
480
481     assoc->init->stream = assoc->encode;
482     assoc->init->print = assoc->print;
483     assoc->init->auth = 0;
484     assoc->init->referenceId = 0;
485     assoc->init->implementation_version = 0;
486     assoc->init->implementation_id = 0;
487     assoc->init->implementation_name = 0;
488     assoc->init->bend_sort = NULL;
489     assoc->init->bend_search = NULL;
490     assoc->init->bend_present = NULL;
491     assoc->init->bend_esrequest = NULL;
492     assoc->init->bend_delete = NULL;
493     assoc->init->bend_scan = NULL;
494     assoc->init->bend_segment = NULL;
495     assoc->init->bend_fetch = NULL;
496     assoc->init->bend_explain = NULL;
497     assoc->init->bend_srw_scan = NULL;
498     assoc->init->bend_srw_update = NULL;
499
500     assoc->init->charneg_request = NULL;
501     assoc->init->charneg_response = NULL;
502
503     assoc->init->decode = assoc->decode;
504     assoc->init->peer_name = 
505         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
506
507     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
508 }
509
510 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
511 {
512     statserv_options_block *cb = statserv_getcontrol();
513     if (!assoc->init)
514     {
515         const char *encoding = "UTF-8";
516         Z_External *ce;
517         bend_initresult *binitres;
518
519         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
520         assoc_init_reset(assoc);
521         
522         if (sr->username)
523         {
524             Z_IdAuthentication *auth = odr_malloc(assoc->decode, sizeof(*auth));
525             int len;
526
527             len = strlen(sr->username) + 1;
528             if (sr->password) 
529                 len += strlen(sr->password) + 2;
530             auth->which = Z_IdAuthentication_open;
531             auth->u.open = odr_malloc(assoc->decode, len);
532             strcpy(auth->u.open, sr->username);
533             if (sr->password && *sr->password)
534             {
535                 strcat(auth->u.open, "/");
536                 strcat(auth->u.open, sr->password);
537             }
538             assoc->init->auth = auth;
539         }
540
541 #if 1
542         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
543         assoc->init->charneg_request = ce->u.charNeg3;
544 #endif
545         assoc->backend = 0;
546         if (!(binitres = (*cb->bend_init)(assoc->init)))
547         {
548             assoc->state = ASSOC_DEAD;
549             yaz_add_srw_diagnostic(assoc->encode, d, num,
550                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
551             return 0;
552         }
553         assoc->backend = binitres->handle;
554         assoc->init->auth = 0;
555         if (binitres->errcode)
556         {
557             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
558             assoc->state = ASSOC_DEAD;
559             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
560                                    binitres->errstring);
561             return 0;
562         }
563         return 1;
564     }
565     return 1;
566 }
567
568 static const char *get_esn(Z_RecordComposition *comp)
569 {
570     if (comp && comp->which == Z_RecordComp_complex)
571     {
572         if (comp->u.complex->generic 
573             && comp->u.complex->generic->elementSpec
574             && (comp->u.complex->generic->elementSpec->which == 
575                 Z_ElementSpec_elementSetName))
576             return comp->u.complex->generic->elementSpec->u.elementSetName;
577     }
578     else if (comp && comp->which == Z_RecordComp_simple &&
579              comp->u.simple->which == Z_ElementSetNames_generic)
580         return comp->u.simple->u.generic;
581     return 0;
582 }
583
584 static void set_esn(Z_RecordComposition **comp_p, const char *esn, NMEM nmem)
585 {
586     Z_RecordComposition *comp = nmem_malloc(nmem, sizeof(*comp));
587     
588     comp->which = Z_RecordComp_simple;
589     comp->u.simple = nmem_malloc(nmem, sizeof(*comp->u.simple));
590     comp->u.simple->which = Z_ElementSetNames_generic;
591     comp->u.simple->u.generic = nmem_strdup(nmem, esn);
592     *comp_p = comp;
593 }
594
595 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
596 {
597 #if YAZ_HAVE_XML2
598     yaz_record_conv_t rc = 0;
599     const char *match_schema = 0;
600     int *match_syntax = 0;
601
602     if (assoc->server)
603     {
604         int r;
605         const char *input_schema = get_esn(rr->comp);
606         Odr_oid *input_syntax_raw = rr->request_format_raw;
607         
608         const char *backend_schema = 0;
609         Odr_oid *backend_syntax = 0;
610
611         r = yaz_retrieval_request(assoc->server->retrieval,
612                                   input_schema,
613                                   input_syntax_raw,
614                                   &match_schema,
615                                   &match_syntax,
616                                   &rc,
617                                   &backend_schema,
618                                   &backend_syntax);
619         if (r == -1) /* error ? */
620         {
621             const char *details = yaz_retrieval_get_error(
622                 assoc->server->retrieval);
623
624             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
625             if (details)
626                 rr->errstring = odr_strdup(rr->stream, details);
627             return -1;
628         }
629         else if (r == 1 || r == 3)
630         {
631             const char *details = input_schema;
632             rr->errcode =  YAZ_BIB1_ELEMENT_SET_NAMES_UNSUPP;
633             if (details)
634                 rr->errstring = odr_strdup(rr->stream, details);
635             return -1;
636         }
637         else if (r == 2)
638         {
639             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
640             if (input_syntax_raw)
641             {
642                 char oidbuf[OID_STR_MAX];
643                 oid_to_dotstring(input_syntax_raw, oidbuf);
644                 rr->errstring = odr_strdup(rr->stream, oidbuf);
645             }
646             return -1;
647         }
648         if (backend_schema)
649         {
650             set_esn(&rr->comp, backend_schema, rr->stream->mem);
651         }
652         if (backend_syntax)
653         {
654             oident *oident_syntax = oid_getentbyoid(backend_syntax);
655
656             rr->request_format_raw = backend_syntax;
657             
658             if (oident_syntax)
659                 rr->request_format = oident_syntax->value;
660             else
661                 rr->request_format = VAL_NONE;
662         }
663     }
664     (*assoc->init->bend_fetch)(assoc->backend, rr);
665     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
666     {   /* post conversion must take place .. */
667         WRBUF output_record = wrbuf_alloc();
668         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
669         if (r)
670         {
671             const char *details = yaz_record_conv_get_error(rc);
672             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
673             if (details)
674                 rr->errstring = odr_strdup(rr->stream, details);
675         }
676         else
677         {
678             rr->len = wrbuf_len(output_record);
679             rr->record = odr_malloc(rr->stream, rr->len);
680             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
681         }
682         wrbuf_free(output_record, 1);
683     }
684     if (match_syntax)
685     {
686         struct oident *oi = oid_getentbyoid(match_syntax);
687         rr->output_format = oi ? oi->value : VAL_NONE;
688         rr->output_format_raw = match_syntax;
689     }
690     if (match_schema)
691         rr->schema = odr_strdup(rr->stream, match_schema);
692     return 0;
693 #else
694     (*assoc->init->bend_fetch)(assoc->backend, rr);
695 #endif
696 }
697
698 static int srw_bend_fetch(association *assoc, int pos,
699                           Z_SRW_searchRetrieveRequest *srw_req,
700                           Z_SRW_record *record,
701                           const char **addinfo)
702 {
703     bend_fetch_rr rr;
704     ODR o = assoc->encode;
705
706     rr.setname = "default";
707     rr.number = pos;
708     rr.referenceId = 0;
709     rr.request_format = VAL_TEXT_XML;
710     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
711                                                    CLASS_RECSYN,
712                                                    VAL_TEXT_XML);
713     rr.comp = (Z_RecordComposition *)
714             odr_malloc(assoc->decode, sizeof(*rr.comp));
715     rr.comp->which = Z_RecordComp_complex;
716     rr.comp->u.complex = (Z_CompSpec *)
717             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
718     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
719         odr_malloc(assoc->encode, sizeof(bool_t));
720     *rr.comp->u.complex->selectAlternativeSyntax = 0;    
721     rr.comp->u.complex->num_dbSpecific = 0;
722     rr.comp->u.complex->dbSpecific = 0;
723     rr.comp->u.complex->num_recordSyntax = 0; 
724     rr.comp->u.complex->recordSyntax = 0;
725
726     rr.comp->u.complex->generic = (Z_Specification *) 
727             odr_malloc(assoc->decode, sizeof(Z_Specification));
728
729     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
730     rr.comp->u.complex->generic->which = Z_Schema_uri;
731     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
732
733     /* ESN = recordSchema if recordSchema is present */
734     rr.comp->u.complex->generic->elementSpec = 0;
735     if (srw_req->recordSchema)
736     {
737         rr.comp->u.complex->generic->elementSpec = 
738             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
739         rr.comp->u.complex->generic->elementSpec->which = 
740             Z_ElementSpec_elementSetName;
741         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
742             srw_req->recordSchema;
743     }
744     
745     rr.stream = assoc->encode;
746     rr.print = assoc->print;
747
748     rr.basename = 0;
749     rr.len = 0;
750     rr.record = 0;
751     rr.last_in_set = 0;
752     rr.errcode = 0;
753     rr.errstring = 0;
754     rr.surrogate_flag = 0;
755     rr.schema = srw_req->recordSchema;
756
757     if (!assoc->init->bend_fetch)
758         return 1;
759
760     retrieve_fetch(assoc, &rr);
761
762     if (rr.errcode && rr.surrogate_flag)
763     {
764         int code = yaz_diag_bib1_to_srw(rr.errcode);
765         const char *message = yaz_diag_srw_str(code);
766         int len = 200;
767         if (message)
768             len += strlen(message);
769         if (rr.errstring)
770             len += strlen(rr.errstring);
771
772         record->recordData_buf = odr_malloc(o, len);
773         
774         sprintf(record->recordData_buf, "<diagnostic "
775                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
776                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
777         if (rr.errstring)
778             sprintf(record->recordData_buf + strlen(record->recordData_buf),
779                     " <details>%s</details>\n", rr.errstring);
780         if (message)
781             sprintf(record->recordData_buf + strlen(record->recordData_buf),
782                     " <message>%s</message>\n", message);
783         sprintf(record->recordData_buf + strlen(record->recordData_buf),
784                 "</diagnostic>\n");
785         record->recordData_len = strlen(record->recordData_buf);
786         record->recordPosition = odr_intdup(o, pos);
787         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
788         return 0;
789     }
790     else if (rr.len >= 0)
791     {
792         record->recordData_buf = rr.record;
793         record->recordData_len = rr.len;
794         record->recordPosition = odr_intdup(o, pos);
795         if (rr.schema)
796             record->recordSchema = odr_strdup(o, rr.schema);
797         else
798             record->recordSchema = 0;
799     }
800     if (rr.errcode)
801     {
802         *addinfo = rr.errstring;
803         return rr.errcode;
804     }
805     return 0;
806 }
807
808 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
809                    Z_Query *query_result)
810 {
811     /* have a CQL query and  CQL to PQF transform .. */
812     CQL_parser cp = cql_parser_create();
813     int r;
814     int srw_errcode = 0;
815     const char *add = 0;
816     char rpn_buf[5120];
817             
818     r = cql_parser_string(cp, cql);
819     if (r)
820     {
821         /* CQL syntax error */
822         srw_errcode = 10; 
823     }
824     if (!r)
825     {
826         /* Syntax OK */
827         r = cql_transform_buf(ct,
828                               cql_parser_result(cp),
829                               rpn_buf, sizeof(rpn_buf)-1);
830         if (r)
831             srw_errcode  = cql_transform_error(ct, &add);
832     }
833     if (!r)
834     {
835         /* Syntax & transform OK. */
836         /* Convert PQF string to Z39.50 to RPN query struct */
837         YAZ_PQF_Parser pp = yaz_pqf_create();
838         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
839         if (!rpnquery)
840         {
841             size_t off;
842             const char *pqf_msg;
843             int code = yaz_pqf_error(pp, &pqf_msg, &off);
844             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
845                     pqf_msg, code);
846             srw_errcode = 10;
847         }
848         else
849         {
850             query_result->which = Z_Query_type_1;
851             query_result->u.type_1 = rpnquery;
852         }
853         yaz_pqf_destroy(pp);
854     }
855     cql_parser_destroy(cp);
856     return srw_errcode;
857 }
858
859 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
860                         Z_AttributesPlusTerm *result)
861 {
862     Z_Query query;
863     Z_RPNQuery *rpn;
864     int srw_error = cql2pqf(odr, cql, ct, &query);
865     if (srw_error)
866         return srw_error;
867     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
868         return 10; /* bad query type */
869     rpn = query.u.type_1;
870     if (!rpn->RPNStructure) 
871         return 10; /* must be structure */
872     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
873         return 10; /* must be simple */
874     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
875         return 10; /* must be attributes plus term node .. */
876     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
877            sizeof(*result));
878     return 0;
879 }
880                    
881 static void srw_bend_search(association *assoc, request *req,
882                             Z_SRW_PDU *sr,
883                             Z_SRW_searchRetrieveResponse *srw_res,
884                             int *http_code)
885 {
886     int srw_error = 0;
887     Z_External *ext;
888     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
889     
890     *http_code = 200;
891     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
892     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
893     if (srw_res->num_diagnostics == 0 && assoc->init)
894     {
895         bend_search_rr rr;
896         rr.setname = "default";
897         rr.replace_set = 1;
898         rr.num_bases = 1;
899         rr.basenames = &srw_req->database;
900         rr.referenceId = 0;
901         rr.srw_sortKeys = 0;
902         rr.srw_setname = 0;
903         rr.srw_setnameIdleTime = 0;
904         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
905         rr.query->u.type_1 = 0;
906         
907         if (srw_req->query_type == Z_SRW_query_type_cql)
908         {
909             if (assoc->server && assoc->server->cql_transform)
910             {
911                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
912                                           assoc->server->cql_transform,
913                                           rr.query);
914                 if (srw_errcode)
915                 {
916                     yaz_add_srw_diagnostic(assoc->encode,
917                                            &srw_res->diagnostics,
918                                            &srw_res->num_diagnostics,
919                                            srw_errcode, 0);
920                 }
921             }
922             else
923             {
924                 /* CQL query to backend. Wrap it - Z39.50 style */
925                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
926                 ext->direct_reference = odr_getoidbystr(assoc->decode, 
927                                                         "1.2.840.10003.16.2");
928                 ext->indirect_reference = 0;
929                 ext->descriptor = 0;
930                 ext->which = Z_External_CQL;
931                 ext->u.cql = srw_req->query.cql;
932                 
933                 rr.query->which = Z_Query_type_104;
934                 rr.query->u.type_104 =  ext;
935             }
936         }
937         else if (srw_req->query_type == Z_SRW_query_type_pqf)
938         {
939             Z_RPNQuery *RPNquery;
940             YAZ_PQF_Parser pqf_parser;
941             
942             pqf_parser = yaz_pqf_create ();
943             
944             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
945                                       srw_req->query.pqf);
946             if (!RPNquery)
947             {
948                 const char *pqf_msg;
949                 size_t off;
950                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
951                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
952                         code, pqf_msg, (long) off);
953                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
954             }
955             
956             rr.query->which = Z_Query_type_1;
957             rr.query->u.type_1 =  RPNquery;
958             
959             yaz_pqf_destroy (pqf_parser);
960         }
961         else
962         {
963             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
964                                    &srw_res->num_diagnostics,
965                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
966         }
967         if (rr.query->u.type_1)
968         {
969             rr.stream = assoc->encode;
970             rr.decode = assoc->decode;
971             rr.print = assoc->print;
972             rr.request = req;
973             if ( srw_req->sort.sortKeys )
974                 rr.srw_sortKeys = odr_strdup(assoc->encode, 
975                                              srw_req->sort.sortKeys );
976             rr.association = assoc;
977             rr.fd = 0;
978             rr.hits = 0;
979             rr.errcode = 0;
980             rr.errstring = 0;
981             rr.search_info = 0;
982             yaz_log_zquery_level(log_requestdetail,rr.query);
983             
984             (assoc->init->bend_search)(assoc->backend, &rr);
985             if (rr.errcode)
986             {
987                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
988                 {
989                     *http_code = 404;
990                 }
991                 else
992                 {
993                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
994                     yaz_add_srw_diagnostic(assoc->encode,
995                                            &srw_res->diagnostics,
996                                            &srw_res->num_diagnostics,
997                                            srw_error, rr.errstring);
998                 }
999             }
1000             else
1001             {
1002                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
1003                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
1004                 
1005                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
1006                         start, number, rr.hits);
1007                 
1008                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
1009                 if (rr.srw_setname)
1010                 {
1011                     srw_res->resultSetId =
1012                         odr_strdup(assoc->encode, rr.srw_setname );
1013                     srw_res->resultSetIdleTime =
1014                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1015                 }
1016                 
1017                 if ((rr.hits > 0 && start > rr.hits) || start < 1)
1018                 {
1019                     yaz_add_srw_diagnostic(
1020                         assoc->encode, 
1021                         &srw_res->diagnostics, &srw_res->num_diagnostics,
1022                         YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1023                 }
1024                 else if (number > 0)
1025                 {
1026                     int i;
1027                     int ok = 1;
1028                     if (start + number > rr.hits)
1029                         number = rr.hits - start + 1;
1030                     
1031                     /* Call bend_present if defined */
1032                     if (assoc->init->bend_present)
1033                     {
1034                         bend_present_rr *bprr = (bend_present_rr*)
1035                             odr_malloc (assoc->decode, sizeof(*bprr));
1036                         bprr->setname = "default";
1037                         bprr->start = start;
1038                         bprr->number = number;
1039                         bprr->format = VAL_TEXT_XML;
1040                         if (srw_req->recordSchema)
1041                         {
1042                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1043                                                                             sizeof(*bprr->comp));
1044                             bprr->comp->which = Z_RecordComp_simple;
1045                             bprr->comp->u.simple = (Z_ElementSetNames *)
1046                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1047                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1048                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1049                         }
1050                         else
1051                         {
1052                             bprr->comp = 0;
1053                         }
1054                         bprr->stream = assoc->encode;
1055                         bprr->referenceId = 0;
1056                         bprr->print = assoc->print;
1057                         bprr->request = req;
1058                         bprr->association = assoc;
1059                         bprr->errcode = 0;
1060                         bprr->errstring = NULL;
1061                         (*assoc->init->bend_present)(assoc->backend, bprr);
1062                         
1063                         if (!bprr->request)
1064                             return;
1065                         if (bprr->errcode)
1066                         {
1067                             srw_error = yaz_diag_bib1_to_srw (bprr->errcode);
1068                             yaz_add_srw_diagnostic(assoc->encode,
1069                                                    &srw_res->diagnostics,
1070                                                    &srw_res->num_diagnostics,
1071                                                    srw_error, bprr->errstring);
1072                             ok = 0;
1073                         }
1074                     }
1075                     
1076                     if (ok)
1077                     {
1078                         int j = 0;
1079                         int packing = Z_SRW_recordPacking_string;
1080                         if (srw_req->recordPacking){
1081                             if (!strcmp(srw_req->recordPacking, "xml"))
1082                                 packing = Z_SRW_recordPacking_XML;
1083                             if (!strcmp(srw_req->recordPacking, "url"))
1084                                 packing = Z_SRW_recordPacking_URL;
1085                         }
1086                         srw_res->records = (Z_SRW_record *)
1087                             odr_malloc(assoc->encode,
1088                                        number * sizeof(*srw_res->records));
1089                         
1090                         srw_res->extra_records = (Z_SRW_extra_record **)
1091                             odr_malloc(assoc->encode,
1092                                        number*sizeof(*srw_res->extra_records));
1093                         
1094                         for (i = 0; i<number; i++)
1095                         {
1096                             int errcode;
1097                             const char *addinfo = 0;
1098                             
1099                             srw_res->records[j].recordPacking = packing;
1100                             srw_res->records[j].recordData_buf = 0;
1101                             srw_res->extra_records[j] = 0;
1102                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1103                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1104                                                      srw_res->records + j,
1105                                                      &addinfo);
1106                             if (errcode)
1107                             {
1108                                 yaz_add_srw_diagnostic(assoc->encode,
1109                                                        &srw_res->diagnostics,
1110                                                        &srw_res->num_diagnostics,
1111                                                        yaz_diag_bib1_to_srw (errcode),
1112                                                        addinfo);
1113                                 
1114                                 break;
1115                             }
1116                             if (srw_res->records[j].recordData_buf)
1117                                 j++;
1118                         }
1119                         srw_res->num_records = j;
1120                         if (!j)
1121                             srw_res->records = 0;
1122                     }
1123                 }
1124             }
1125         }
1126     }
1127     if (log_request)
1128     {
1129         const char *querystr = "?";
1130         const char *querytype = "?";
1131         WRBUF wr = wrbuf_alloc();
1132
1133         switch (srw_req->query_type)
1134         {
1135         case Z_SRW_query_type_cql:
1136             querytype = "CQL";
1137             querystr = srw_req->query.cql;
1138             break;
1139         case Z_SRW_query_type_pqf:
1140             querytype = "PQF";
1141             querystr = srw_req->query.pqf;
1142             break;
1143         }
1144         wrbuf_printf(wr, "SRWSearch ");
1145         wrbuf_printf(wr, srw_req->database);
1146         wrbuf_printf(wr, " ");
1147         if (srw_res->num_diagnostics)
1148             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1149         else if (*http_code != 200)
1150             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1151         else if (srw_res->numberOfRecords)
1152         {
1153             wrbuf_printf(wr, "OK %d",
1154                          (srw_res->numberOfRecords ?
1155                           *srw_res->numberOfRecords : 0));
1156         }
1157         wrbuf_printf(wr, " %s %d+%d", 
1158                      (srw_res->resultSetId ?
1159                       srw_res->resultSetId : "-"),
1160                      (srw_req->startRecord ? *srw_req->startRecord : 1), 
1161                      srw_res->num_records);
1162         yaz_log(log_request, "%s %s: %s", wrbuf_buf(wr), querytype, querystr);
1163         wrbuf_free(wr, 1);
1164     }
1165 }
1166
1167 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1168 {
1169 #if YAZ_HAVE_XML2
1170     xmlNodePtr ptr = rr->server_node_ptr;
1171     if (!ptr)
1172         return 0;
1173     for (ptr = ptr->children; ptr; ptr = ptr->next)
1174     {
1175         if (ptr->type != XML_ELEMENT_NODE)
1176             continue;
1177         if (!strcmp((const char *) ptr->name, "explain"))
1178         {
1179             int len;
1180             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1181             xmlChar *buf_out;
1182             char *content;
1183
1184             ptr = xmlCopyNode(ptr, 1);
1185         
1186             xmlDocSetRootElement(doc, ptr);
1187             
1188             xmlDocDumpMemory(doc, &buf_out, &len);
1189             content = (char*) odr_malloc(rr->stream, 1+len);
1190             memcpy(content, buf_out, len);
1191             content[len] = '\0';
1192             
1193             xmlFree(buf_out);
1194             xmlFreeDoc(doc);
1195             rr->explain_buf = content;
1196             return 0;
1197         }
1198     }
1199 #endif
1200     return 0;
1201 }
1202
1203 static void srw_bend_explain(association *assoc, request *req,
1204                              Z_SRW_PDU *sr,
1205                              Z_SRW_explainResponse *srw_res,
1206                              int *http_code)
1207 {
1208     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1209     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1210     *http_code = 404;
1211     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1212     if (assoc->init)
1213     {
1214         bend_explain_rr rr;
1215         
1216         rr.stream = assoc->encode;
1217         rr.decode = assoc->decode;
1218         rr.print = assoc->print;
1219         rr.explain_buf = 0;
1220         rr.database = srw_req->database;
1221         if (assoc->server)
1222             rr.server_node_ptr = assoc->server->server_node_ptr;
1223         else
1224             rr.server_node_ptr = 0;
1225         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1226         if (assoc->init->bend_explain)
1227             (*assoc->init->bend_explain)(assoc->backend, &rr);
1228         else
1229             srw_bend_explain_default(assoc->backend, &rr);
1230
1231         if (rr.explain_buf)
1232         {
1233             int packing = Z_SRW_recordPacking_string;
1234             if (srw_req->recordPacking)
1235             {
1236                 if (!strcmp(srw_req->recordPacking, "xml"))
1237                     packing = Z_SRW_recordPacking_XML;
1238                 else if (!strcmp(srw_req->recordPacking, "url"))
1239                     packing = Z_SRW_recordPacking_URL;
1240             }
1241             srw_res->record.recordSchema = rr.schema;
1242             srw_res->record.recordPacking = packing;
1243             srw_res->record.recordData_buf = rr.explain_buf;
1244             srw_res->record.recordData_len = strlen(rr.explain_buf);
1245             srw_res->record.recordPosition = 0;
1246             *http_code = 200;
1247         }
1248     }
1249 }
1250
1251 static void srw_bend_scan(association *assoc, request *req,
1252                           Z_SRW_PDU *sr,
1253                           Z_SRW_scanResponse *srw_res,
1254                           int *http_code)
1255 {
1256     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1257     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1258
1259     *http_code = 200;
1260     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1261     if (srw_res->num_diagnostics == 0 && assoc->init)
1262     {
1263         struct scan_entry *save_entries;
1264
1265         bend_scan_rr *bsrr = (bend_scan_rr *)
1266             odr_malloc (assoc->encode, sizeof(*bsrr));
1267         bsrr->num_bases = 1;
1268         bsrr->basenames = &srw_req->database;
1269
1270         bsrr->num_entries = srw_req->maximumTerms ?
1271             *srw_req->maximumTerms : 10;
1272         bsrr->term_position = srw_req->responsePosition ?
1273             *srw_req->responsePosition : 1;
1274
1275         bsrr->errcode = 0;
1276         bsrr->errstring = 0;
1277         bsrr->referenceId = 0;
1278         bsrr->stream = assoc->encode;
1279         bsrr->print = assoc->print;
1280         bsrr->step_size = odr_intdup(assoc->decode, 0);
1281         bsrr->entries = 0;
1282
1283         if (bsrr->num_entries > 0) 
1284         {
1285             int i;
1286             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1287                                        bsrr->num_entries);
1288             for (i = 0; i<bsrr->num_entries; i++)
1289             {
1290                 bsrr->entries[i].term = 0;
1291                 bsrr->entries[i].occurrences = 0;
1292                 bsrr->entries[i].errcode = 0;
1293                 bsrr->entries[i].errstring = 0;
1294                 bsrr->entries[i].display_term = 0;
1295             }
1296         }
1297         save_entries = bsrr->entries;  /* save it so we can compare later */
1298
1299         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1300             assoc->init->bend_scan)
1301         {
1302             Odr_oid *scan_attributeSet = 0;
1303             oident *attset;
1304             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1305             
1306             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1307                                       &scan_attributeSet, 
1308                                       srw_req->scanClause.pqf); 
1309             if (scan_attributeSet &&
1310                 (attset = oid_getentbyoid(scan_attributeSet)) &&
1311                 (attset->oclass == CLASS_ATTSET ||
1312                  attset->oclass == CLASS_GENERAL))
1313                 bsrr->attributeset = attset->value;
1314             else
1315                 bsrr->attributeset = VAL_NONE;
1316             yaz_pqf_destroy(pqf_parser);
1317             bsrr->scanClause = 0;
1318             ((int (*)(void *, bend_scan_rr *))
1319              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1320         }
1321         else if (srw_req->query_type == Z_SRW_query_type_cql
1322                  && assoc->init->bend_scan && assoc->server
1323                  && assoc->server->cql_transform)
1324         {
1325             int srw_error;
1326             bsrr->scanClause = 0;
1327             bsrr->attributeset = VAL_NONE;
1328             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1329             srw_error = cql2pqf_scan(assoc->encode,
1330                                      srw_req->scanClause.cql,
1331                                      assoc->server->cql_transform,
1332                                      bsrr->term);
1333             if (srw_error)
1334                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1335                                        &srw_res->num_diagnostics,
1336                                        srw_error, 0);
1337             else
1338             {
1339                 ((int (*)(void *, bend_scan_rr *))
1340                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1341             }
1342         }
1343         else if (srw_req->query_type == Z_SRW_query_type_cql
1344                  && assoc->init->bend_srw_scan)
1345         {
1346             bsrr->term = 0;
1347             bsrr->attributeset = VAL_NONE;
1348             bsrr->scanClause = srw_req->scanClause.cql;
1349             ((int (*)(void *, bend_scan_rr *))
1350              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1351         }
1352         else
1353         {
1354             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1355                                    &srw_res->num_diagnostics,
1356                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1357         }
1358         if (bsrr->errcode)
1359         {
1360             int srw_error;
1361             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1362             {
1363                 *http_code = 404;
1364                 return;
1365             }
1366             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1367
1368             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1369                                    &srw_res->num_diagnostics,
1370                                    srw_error, bsrr->errstring);
1371         }
1372         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1373         {
1374             int i;
1375             srw_res->terms = (Z_SRW_scanTerm*)
1376                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1377                            bsrr->num_entries);
1378
1379             srw_res->num_terms =  bsrr->num_entries;
1380             for (i = 0; i<bsrr->num_entries; i++)
1381             {
1382                 Z_SRW_scanTerm *t = srw_res->terms + i;
1383                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1384                 t->numberOfRecords =
1385                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1386                 t->displayTerm = 0;
1387                 if (save_entries == bsrr->entries && 
1388                     bsrr->entries[i].display_term)
1389                 {
1390                     /* the entries was _not_ set by the handler. So it's
1391                        safe to test for new member display_term. It is
1392                        NULL'ed by us.
1393                     */
1394                     t->displayTerm = odr_strdup(assoc->encode, 
1395                                                 bsrr->entries[i].display_term);
1396                 }
1397                 t->whereInList = 0;
1398             }
1399         }
1400     }
1401     if (log_request)
1402     {
1403         WRBUF wr = wrbuf_alloc();
1404         const char *querytype = 0;
1405         const char *querystr = 0;
1406
1407         switch(srw_req->query_type)
1408         {
1409         case Z_SRW_query_type_pqf:
1410             querytype = "PQF";
1411             querystr = srw_req->scanClause.pqf;
1412             break;
1413         case Z_SRW_query_type_cql:
1414             querytype = "CQL";
1415             querystr = srw_req->scanClause.cql;
1416             break;
1417         default:
1418             querytype = "UNKNOWN";
1419             querystr = "";
1420         }
1421
1422         wrbuf_printf(wr, "SRWScan ");
1423         wrbuf_printf(wr, srw_req->database);
1424         wrbuf_printf(wr, " ");
1425
1426         if (srw_res->num_diagnostics)
1427             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1428         else if (srw_res->num_terms)
1429             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1430         else
1431             wrbuf_printf(wr, "OK - - ");
1432
1433         wrbuf_printf(wr, "%d+%d+0 ",
1434                      (srw_req->responsePosition ? 
1435                       *srw_req->responsePosition : 1),
1436                      (srw_req->maximumTerms ?
1437                       *srw_req->maximumTerms : 1));
1438         /* there is no step size in SRU/W ??? */
1439         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1440         yaz_log(log_request, "%s ", wrbuf_buf(wr) );
1441         wrbuf_free(wr, 1);
1442     }
1443
1444 }
1445
1446 static void srw_bend_update(association *assoc, request *req,
1447                             Z_SRW_PDU *sr,
1448                             Z_SRW_updateResponse *srw_res,
1449                             int *http_code)
1450 {
1451     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1452     yaz_log(YLOG_DEBUG, "Got SRW UpdateRequest");
1453     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1454     *http_code = 404;
1455     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1456     if (assoc->init)
1457     {
1458         bend_update_rr rr;
1459         
1460         rr.stream = assoc->encode;
1461         rr.print = assoc->print;
1462         rr.num_bases = 1;
1463         rr.basenames = &srw_req->database;
1464         rr.operation = srw_req->operation;
1465         rr.operation_status = "failed";
1466         rr.record_id = 0;
1467         rr.record_version = 0;
1468         rr.record_checksum = 0;
1469         rr.record_old_version = 0;
1470         rr.record_packing = "xml";
1471         rr.record_schema = 0;
1472         rr.record_data = 0;
1473         rr.request_extra_record = 0;
1474         rr.response_extra_record = 0;
1475         rr.extra_request_data = 0;
1476         rr.extra_response_data = 0;
1477         rr.uri = 0;
1478         rr.message = 0;
1479         rr.details = 0;
1480         
1481         if ( rr.operation == 0 ){
1482             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1483                                           &srw_res->num_diagnostics,
1484                                           9, "action" );
1485             return;
1486         }
1487         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1488         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1489         if ( !strcmp( rr.operation, "delete" ) ){
1490             if ( !srw_req->recordId ){
1491                 if ( srw_req->record.recordData_len ){
1492                     if ( srw_req->record.recordSchema == 0 ){
1493                         yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1494                                                       &srw_res->num_diagnostics,
1495                                                       9, "recordSchema" );
1496                     }
1497                     else {
1498                         rr.record_schema = odr_strdup(assoc->encode,
1499                                                       srw_req->record.recordSchema );
1500                     }
1501                     switch (srw_req->record.recordPacking)
1502                         {
1503                         case Z_SRW_recordPacking_string: 
1504                             rr.record_packing = "string";
1505                             break;
1506                         case Z_SRW_recordPacking_XML: 
1507                             rr.record_packing = "xml";
1508                             break;
1509                         case Z_SRW_recordPacking_URL: 
1510                             rr.record_packing = "url";
1511                             break;
1512                         }
1513                     rr.record_data = odr_strdupn(assoc->encode, 
1514                                                  srw_req->record.recordData_buf,
1515                                                  srw_req->record.recordData_len );
1516                     rr.request_extra_record = srw_req->extra_record;
1517                 }
1518                 else {
1519                     yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1520                                                   &srw_res->num_diagnostics,
1521                                                   9, "recordIdentifier OR recordData" );
1522                 }
1523             }
1524             else {
1525                 rr.record_id = srw_req->recordId;
1526                 if ( srw_req->record.recordData_len ){
1527                     yaz_add_sru_update_diagnostic(assoc->encode, 
1528                                                   &srw_res->diagnostics,
1529                                                   &srw_res->num_diagnostics,
1530                                                   9, "recordData" );
1531                 }
1532             }
1533             if (  srw_req->recordVersion ){
1534                 rr.record_version = odr_strdup( assoc->encode,
1535                                                 srw_req->recordVersion );
1536                 
1537             }
1538             if ( srw_req->recordOldVersion ){
1539                 rr.record_old_version = odr_strdup(assoc->encode,
1540                                                    srw_req->recordOldVersion );
1541             }
1542             if ( srw_req->extraRequestData ){
1543                 rr.extra_request_data = odr_strdup(assoc->encode,
1544                                                    srw_req->extraRequestData );
1545             }
1546         }
1547         else if ( !strcmp( rr.operation, "replace" ) ){
1548             if ( !srw_req->recordId ){
1549                 yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1550                                               &srw_res->num_diagnostics,
1551                                               9, "recordIdentifier" );
1552             }
1553             else {
1554                 rr.record_id = srw_req->recordId;
1555             }
1556             if ( srw_req->record.recordSchema == 0 ){
1557                 yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1558                                               &srw_res->num_diagnostics,
1559                                               9, "recordSchema" );
1560             }
1561             else {
1562                 rr.record_schema = odr_strdup(assoc->encode,
1563                                               srw_req->record.recordSchema );
1564             }
1565             switch (srw_req->record.recordPacking)
1566             {
1567             case Z_SRW_recordPacking_string: 
1568                 rr.record_packing = "string";
1569                 break;
1570             case Z_SRW_recordPacking_XML: 
1571                 rr.record_packing = "xml";
1572                 break;
1573             case Z_SRW_recordPacking_URL: 
1574                 rr.record_packing = "url";
1575                 break;
1576             }
1577             if ( srw_req->record.recordData_len ){
1578                 rr.record_data = odr_strdupn(assoc->encode, 
1579                                              srw_req->record.recordData_buf,
1580                                              srw_req->record.recordData_len );
1581                 rr.request_extra_record = srw_req->extra_record;
1582             }
1583             else {
1584                 yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1585                                               &srw_res->num_diagnostics,
1586                                               9, "recordData" );
1587             }
1588             if (srw_req->extraRequestData)
1589                 rr.extra_request_data = odr_strdup(assoc->encode,
1590                                                    srw_req->extraRequestData );
1591         }
1592         else if (!strcmp( rr.operation, "insert" ) ) {
1593             rr.record_id = srw_req->recordId; 
1594             if ( srw_req->record.recordSchema == 0 ){
1595                 yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1596                                               &srw_res->num_diagnostics,
1597                                               9, "recordSchema" );
1598             }
1599             else {
1600                 rr.record_schema = odr_strdup(assoc->encode,
1601                                               srw_req->record.recordSchema);
1602             }
1603             switch (srw_req->record.recordPacking)
1604             {
1605             case Z_SRW_recordPacking_string: 
1606                 rr.record_packing = "string";
1607                 break;
1608             case Z_SRW_recordPacking_XML: 
1609                 rr.record_packing = "xml";
1610                 break;
1611             case Z_SRW_recordPacking_URL: 
1612                 rr.record_packing = "url";
1613                 break;
1614             }
1615             
1616             if (srw_req->record.recordData_len)
1617             {
1618                 rr.record_data = odr_strdupn(assoc->encode, 
1619                                              srw_req->record.recordData_buf,
1620                                              srw_req->record.recordData_len );
1621                 rr.request_extra_record = srw_req->extra_record;
1622             }
1623             else
1624                 yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1625                                              &srw_res->num_diagnostics,
1626                                              9, "recordData" );
1627             if ( srw_req->extraRequestData )
1628                 rr.extra_request_data = odr_strdup(assoc->encode,
1629                                                    srw_req->extraRequestData );
1630         }
1631         else { 
1632             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1633                                           &srw_res->num_diagnostics,
1634                                           100, rr.operation );
1635         }
1636         if (srw_res->num_diagnostics == 0)
1637         {
1638             if ( assoc->init->bend_srw_update)
1639                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1640             else {
1641                 yaz_log( YLOG_WARN, "Got No Update function!");
1642                 return;
1643             }
1644         }
1645
1646         if (rr.uri)
1647             yaz_add_srw_diagnostic_uri(assoc->encode,
1648                                        &srw_res->diagnostics,
1649                                        &srw_res->num_diagnostics,
1650                                        rr.uri, 
1651                                        rr.message,
1652                                        rr.details);
1653         srw_res->recordId = rr.record_id;
1654         srw_res->operationStatus = rr.operation_status;
1655         srw_res->recordVersion = rr.record_version;
1656         srw_res->recordChecksum = rr.record_checksum;
1657         srw_res->extraResponseData = rr.extra_response_data;
1658         srw_res->record.recordPosition = 0;
1659         if (srw_res->num_diagnostics == 0 && rr.record_data)
1660         {
1661             srw_res->record.recordSchema = rr.record_schema;
1662             srw_res->record.recordPacking = srw_req->record.recordPacking;
1663             srw_res->record.recordData_buf = rr.record_data;
1664             srw_res->record.recordData_len = strlen(rr.record_data);
1665             srw_res->extra_record = rr.response_extra_record;
1666                 
1667         }
1668         else
1669             srw_res->record.recordData_len = 0;
1670         *http_code = 200;
1671     }
1672 }
1673
1674 /* check if path is OK (1); BAD (0) */
1675 static int check_path(const char *path)
1676 {
1677     if (*path != '/')
1678         return 0;
1679     if (strstr(path, ".."))
1680         return 0;
1681     return 1;
1682 }
1683
1684 static char *read_file(const char *fname, ODR o, int *sz)
1685 {
1686     char *buf;
1687     FILE *inf = fopen(fname, "rb");
1688     if (!inf)
1689         return 0;
1690
1691     fseek(inf, 0L, SEEK_END);
1692     *sz = ftell(inf);
1693     rewind(inf);
1694     buf = odr_malloc(o, *sz);
1695     fread(buf, 1, *sz, inf);
1696     fclose(inf);
1697     return buf;     
1698 }
1699
1700 static void process_http_request(association *assoc, request *req)
1701 {
1702     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1703     ODR o = assoc->encode;
1704     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1705     Z_SRW_PDU *sr = 0;
1706     Z_SOAP *soap_package = 0;
1707     Z_GDU *p = 0;
1708     char *charset = 0;
1709     Z_HTTP_Response *hres = 0;
1710     int keepalive = 1;
1711     const char *stylesheet = 0; /* for now .. set later */
1712     Z_SRW_diagnostic *diagnostic = 0;
1713     int num_diagnostic = 0;
1714     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1715
1716     if (!control_association(assoc, host, 0))
1717     {
1718         p = z_get_HTTP_Response(o, 404);
1719         r = 1;
1720     }
1721     if (r == 2 && assoc->server && assoc->server->docpath
1722         && hreq->path[0] == '/' 
1723         && 
1724         /* check if path is a proper prefix of documentroot */
1725         strncmp(hreq->path+1, assoc->server->docpath,
1726                 strlen(assoc->server->docpath))
1727         == 0)
1728     {   
1729         if (!check_path(hreq->path))
1730         {
1731             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1732             p = z_get_HTTP_Response(o, 404);
1733         }
1734         else
1735         {
1736             int content_size = 0;
1737             char *content_buf = read_file(hreq->path+1, o, &content_size);
1738             if (!content_buf)
1739             {
1740                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1741                 p = z_get_HTTP_Response(o, 404);
1742             }
1743             else
1744             {
1745                 const char *ctype = 0;
1746                 yaz_mime_types types = yaz_mime_types_create();
1747                 
1748                 yaz_mime_types_add(types, "xsl", "application/xml");
1749                 yaz_mime_types_add(types, "xml", "application/xml");
1750                 yaz_mime_types_add(types, "css", "text/css");
1751                 yaz_mime_types_add(types, "html", "text/html");
1752                 yaz_mime_types_add(types, "htm", "text/html");
1753                 yaz_mime_types_add(types, "txt", "text/plain");
1754                 yaz_mime_types_add(types, "js", "application/x-javascript");
1755                 
1756                 yaz_mime_types_add(types, "gif", "image/gif");
1757                 yaz_mime_types_add(types, "png", "image/png");
1758                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1759                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1760                 
1761                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1762                 if (!ctype)
1763                 {
1764                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1765                     p = z_get_HTTP_Response(o, 404);
1766                 }
1767                 else
1768                 {
1769                     p = z_get_HTTP_Response(o, 200);
1770                     hres = p->u.HTTP_Response;
1771                     hres->content_buf = content_buf;
1772                     hres->content_len = content_size;
1773                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1774                 }
1775                 yaz_mime_types_destroy(types);
1776             }
1777         }
1778         r = 1;
1779     }
1780
1781     if (r == 2)
1782     {
1783         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1784         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1785     }
1786     if (r == 2)  /* not taken */
1787     {
1788         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1789                            &diagnostic, &num_diagnostic);
1790         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1791     }
1792     if (r == 0)  /* decode SRW/SRU OK .. */
1793     {
1794         int http_code = 200;
1795         if (sr->which == Z_SRW_searchRetrieve_request)
1796         {
1797             Z_SRW_PDU *res =
1798                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1799
1800             stylesheet = sr->u.request->stylesheet;
1801             if (num_diagnostic)
1802             {
1803                 res->u.response->diagnostics = diagnostic;
1804                 res->u.response->num_diagnostics = num_diagnostic;
1805             }
1806             else
1807             {
1808                 srw_bend_search(assoc, req, sr, res->u.response, 
1809                                 &http_code);
1810             }
1811             if (http_code == 200)
1812                 soap_package->u.generic->p = res;
1813         }
1814         else if (sr->which == Z_SRW_explain_request)
1815         {
1816             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1817             stylesheet = sr->u.explain_request->stylesheet;
1818             if (num_diagnostic)
1819             {   
1820                 res->u.explain_response->diagnostics = diagnostic;
1821                 res->u.explain_response->num_diagnostics = num_diagnostic;
1822             }
1823             srw_bend_explain(assoc, req, sr,
1824                              res->u.explain_response, &http_code);
1825             if (http_code == 200)
1826                 soap_package->u.generic->p = res;
1827         }
1828         else if (sr->which == Z_SRW_scan_request)
1829         {
1830             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1831             stylesheet = sr->u.scan_request->stylesheet;
1832             if (num_diagnostic)
1833             {   
1834                 res->u.scan_response->diagnostics = diagnostic;
1835                 res->u.scan_response->num_diagnostics = num_diagnostic;
1836             }
1837             srw_bend_scan(assoc, req, sr,
1838                           res->u.scan_response, &http_code);
1839             if (http_code == 200)
1840                 soap_package->u.generic->p = res;
1841         }
1842         else if (sr->which == Z_SRW_update_request)
1843         {
1844             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1845             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1846             if (num_diagnostic)
1847             {   
1848                 res->u.update_response->diagnostics = diagnostic;
1849                 res->u.update_response->num_diagnostics = num_diagnostic;
1850             }
1851             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1852             srw_bend_update(assoc, req, sr,
1853                             res->u.update_response, &http_code);
1854             if (http_code == 200)
1855                 soap_package->u.generic->p = res;
1856         }
1857         else
1858         {
1859             yaz_log(log_request, "SOAP ERROR"); 
1860             /* FIXME - what error, what query */
1861             http_code = 500;
1862             z_soap_error(assoc->encode, soap_package,
1863                          "SOAP-ENV:Client", "Bad method", 0); 
1864         }
1865         if (http_code == 200 || http_code == 500)
1866         {
1867             static Z_SOAP_Handler soap_handlers[4] = {
1868 #if YAZ_HAVE_XML2
1869                 {"http://www.loc.gov/zing/srw/", 0,
1870                  (Z_SOAP_fun) yaz_srw_codec},
1871                 {"http://www.loc.gov/zing/srw/v1.0/", 0,
1872                  (Z_SOAP_fun) yaz_srw_codec},
1873                 {"http://www.loc.gov/zing/srw/update/", 0,
1874                  (Z_SOAP_fun) yaz_ucp_codec},
1875 #endif
1876                 {0, 0, 0}
1877             };
1878             char ctype[60];
1879             int ret;
1880             p = z_get_HTTP_Response(o, 200);
1881             hres = p->u.HTTP_Response;
1882
1883             if (!stylesheet && assoc->server)
1884                 stylesheet = assoc->server->stylesheet;
1885
1886             /* empty stylesheet means NO stylesheet */
1887             if (stylesheet && *stylesheet == '\0')
1888                 stylesheet = 0;
1889
1890             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1891                                        &hres->content_buf, &hres->content_len,
1892                                        soap_handlers, charset, stylesheet);
1893             hres->code = http_code;
1894
1895             strcpy(ctype, "text/xml");
1896             if (charset)
1897             {
1898                 strcat(ctype, "; charset=");
1899                 strcat(ctype, charset);
1900             }
1901             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1902         }
1903         else
1904             p = z_get_HTTP_Response(o, http_code);
1905     }
1906
1907     if (p == 0)
1908         p = z_get_HTTP_Response(o, 500);
1909     hres = p->u.HTTP_Response;
1910     if (!strcmp(hreq->version, "1.0")) 
1911     {
1912         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1913         if (v && !strcmp(v, "Keep-Alive"))
1914             keepalive = 1;
1915         else
1916             keepalive = 0;
1917         hres->version = "1.0";
1918     }
1919     else
1920     {
1921         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1922         if (v && !strcmp(v, "close"))
1923             keepalive = 0;
1924         else
1925             keepalive = 1;
1926         hres->version = "1.1";
1927     }
1928     if (!keepalive)
1929     {
1930         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1931         assoc->state = ASSOC_DEAD;
1932         assoc->cs_get_mask = 0;
1933     }
1934     else
1935     {
1936         int t;
1937         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1938
1939         if (alive && isdigit(*(const unsigned char *) alive))
1940             t = atoi(alive);
1941         else
1942             t = 15;
1943         if (t < 0 || t > 3600)
1944             t = 3600;
1945         iochan_settimeout(assoc->client_chan,t);
1946         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1947     }
1948     process_gdu_response(assoc, req, p);
1949 }
1950
1951 static void process_gdu_request(association *assoc, request *req)
1952 {
1953     if (req->gdu_request->which == Z_GDU_Z3950)
1954     {
1955         char *msg = 0;
1956         req->apdu_request = req->gdu_request->u.z3950;
1957         if (process_z_request(assoc, req, &msg) < 0)
1958             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1959     }
1960     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1961         process_http_request(assoc, req);
1962     else
1963     {
1964         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1965     }
1966 }
1967
1968 /*
1969  * Initiate request processing.
1970  */
1971 static int process_z_request(association *assoc, request *req, char **msg)
1972 {
1973     int fd = -1;
1974     Z_APDU *res;
1975     int retval;
1976     
1977     *msg = "Unknown Error";
1978     assert(req && req->state == REQUEST_IDLE);
1979     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1980     {
1981         *msg = "Missing InitRequest";
1982         return -1;
1983     }
1984     switch (req->apdu_request->which)
1985     {
1986     case Z_APDU_initRequest:
1987         res = process_initRequest(assoc, req); break;
1988     case Z_APDU_searchRequest:
1989         res = process_searchRequest(assoc, req, &fd); break;
1990     case Z_APDU_presentRequest:
1991         res = process_presentRequest(assoc, req, &fd); break;
1992     case Z_APDU_scanRequest:
1993         if (assoc->init->bend_scan)
1994             res = process_scanRequest(assoc, req, &fd);
1995         else
1996         {
1997             *msg = "Cannot handle Scan APDU";
1998             return -1;
1999         }
2000         break;
2001     case Z_APDU_extendedServicesRequest:
2002         if (assoc->init->bend_esrequest)
2003             res = process_ESRequest(assoc, req, &fd);
2004         else
2005         {
2006             *msg = "Cannot handle Extended Services APDU";
2007             return -1;
2008         }
2009         break;
2010     case Z_APDU_sortRequest:
2011         if (assoc->init->bend_sort)
2012             res = process_sortRequest(assoc, req, &fd);
2013         else
2014         {
2015             *msg = "Cannot handle Sort APDU";
2016             return -1;
2017         }
2018         break;
2019     case Z_APDU_close:
2020         process_close(assoc, req);
2021         return 0;
2022     case Z_APDU_deleteResultSetRequest:
2023         if (assoc->init->bend_delete)
2024             res = process_deleteRequest(assoc, req, &fd);
2025         else
2026         {
2027             *msg = "Cannot handle Delete APDU";
2028             return -1;
2029         }
2030         break;
2031     case Z_APDU_segmentRequest:
2032         if (assoc->init->bend_segment)
2033         {
2034             res = process_segmentRequest (assoc, req);
2035         }
2036         else
2037         {
2038             *msg = "Cannot handle Segment APDU";
2039             return -1;
2040         }
2041         break;
2042     case Z_APDU_triggerResourceControlRequest:
2043         return 0;
2044     default:
2045         *msg = "Bad APDU received";
2046         return -1;
2047     }
2048     if (res)
2049     {
2050         yaz_log(YLOG_DEBUG, "  result immediately available");
2051         retval = process_z_response(assoc, req, res);
2052     }
2053     else if (fd < 0)
2054     {
2055         yaz_log(YLOG_DEBUG, "  result unavailble");
2056         retval = 0;
2057     }
2058     else /* no result yet - one will be provided later */
2059     {
2060         IOCHAN chan;
2061
2062         /* Set up an I/O handler for the fd supplied by the backend */
2063
2064         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2065         req->state = REQUEST_PENDING;
2066         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2067             abort();
2068         iochan_setdata(chan, assoc);
2069         retval = 0;
2070     }
2071     return retval;
2072 }
2073
2074 /*
2075  * Handle message from the backend.
2076  */
2077 void backend_response(IOCHAN i, int event)
2078 {
2079     association *assoc = (association *)iochan_getdata(i);
2080     request *req = request_head(&assoc->incoming);
2081     Z_APDU *res;
2082     int fd;
2083
2084     yaz_log(YLOG_DEBUG, "backend_response");
2085     assert(assoc && req && req->state != REQUEST_IDLE);
2086     /* determine what it is we're waiting for */
2087     switch (req->apdu_request->which)
2088     {
2089         case Z_APDU_searchRequest:
2090             res = response_searchRequest(assoc, req, 0, &fd); break;
2091 #if 0
2092         case Z_APDU_presentRequest:
2093             res = response_presentRequest(assoc, req, 0, &fd); break;
2094         case Z_APDU_scanRequest:
2095             res = response_scanRequest(assoc, req, 0, &fd); break;
2096 #endif
2097         default:
2098             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2099             abort();
2100     }
2101     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2102     {
2103         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2104         do_close(assoc, Z_Close_systemProblem, 0);
2105         iochan_destroy(i);
2106         return;
2107     }
2108     else if (!res) /* no result yet - try again later */
2109     {
2110         yaz_log(YLOG_DEBUG, "   no result yet");
2111         iochan_setfd(i, fd); /* in case fd has changed */
2112     }
2113 }
2114
2115 /*
2116  * Encode response, and transfer the request structure to the outgoing queue.
2117  */
2118 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2119 {
2120     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2121
2122     if (assoc->print)
2123     {
2124         if (!z_GDU(assoc->print, &res, 0, 0))
2125             yaz_log(YLOG_WARN, "ODR print error: %s", 
2126                 odr_errmsg(odr_geterror(assoc->print)));
2127         odr_reset(assoc->print);
2128     }
2129     if (!z_GDU(assoc->encode, &res, 0, 0))
2130     {
2131         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2132                 odr_errmsg(odr_geterror(assoc->decode)),
2133                 odr_getelement(assoc->decode));
2134         return -1;
2135     }
2136     req->response = odr_getbuf(assoc->encode, &req->len_response,
2137         &req->size_response);
2138     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2139     odr_reset(assoc->encode);
2140     req->state = REQUEST_IDLE;
2141     request_enq(&assoc->outgoing, req);
2142     /* turn the work over to the ir_session handler */
2143     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2144     assoc->cs_put_mask = EVENT_OUTPUT;
2145     /* Is there more work to be done? give that to the input handler too */
2146 #if 1
2147     if (request_head(&assoc->incoming))
2148     {
2149         yaz_log (YLOG_DEBUG, "more work to be done");
2150         iochan_setevent(assoc->client_chan, EVENT_WORK);
2151     }
2152 #endif
2153     return 0;
2154 }
2155
2156 /*
2157  * Encode response, and transfer the request structure to the outgoing queue.
2158  */
2159 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2160 {
2161     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2162     gres->which = Z_GDU_Z3950;
2163     gres->u.z3950 = res;
2164
2165     return process_gdu_response(assoc, req, gres);
2166 }
2167
2168 static char *get_vhost(Z_OtherInformation *otherInfo)
2169 {
2170     return yaz_oi_get_string_oidval(&otherInfo, VAL_PROXY, 1, 0);
2171 }
2172
2173 /*
2174  * Handle init request.
2175  * At the moment, we don't check the options
2176  * anywhere else in the code - we just try not to do anything that would
2177  * break a naive client. We'll toss 'em into the association block when
2178  * we need them there.
2179  */
2180 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2181 {
2182     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2183     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2184     Z_InitResponse *resp = apdu->u.initResponse;
2185     bend_initresult *binitres;
2186     char *version;
2187     char options[140];
2188     statserv_options_block *cb = 0;  /* by default no control for backend */
2189
2190     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2191         cb = statserv_getcontrol();  /* got control block for backend */
2192
2193     if (cb && assoc->backend)
2194         (*cb->bend_close)(assoc->backend);
2195
2196     yaz_log(log_requestdetail, "Got initRequest");
2197     if (req->implementationId)
2198         yaz_log(log_requestdetail, "Id:        %s",
2199                 req->implementationId);
2200     if (req->implementationName)
2201         yaz_log(log_requestdetail, "Name:      %s",
2202                 req->implementationName);
2203     if (req->implementationVersion)
2204         yaz_log(log_requestdetail, "Version:   %s",
2205                 req->implementationVersion);
2206     
2207     assoc_init_reset(assoc);
2208
2209     assoc->init->auth = req->idAuthentication;
2210     assoc->init->referenceId = req->referenceId;
2211
2212     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2213     {
2214         Z_CharSetandLanguageNegotiation *negotiation =
2215             yaz_get_charneg_record (req->otherInfo);
2216         if (negotiation &&
2217             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2218             assoc->init->charneg_request = negotiation;
2219     }
2220
2221     assoc->backend = 0;
2222     if (cb)
2223     {
2224         if (req->implementationVersion)
2225             yaz_log(log_requestdetail, "Config:    %s",
2226                     cb->configname);
2227     
2228         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2229         
2230         /* we have a backend control block, so call that init function */
2231         if (!(binitres = (*cb->bend_init)(assoc->init)))
2232         {
2233             yaz_log(YLOG_WARN, "Bad response from backend.");
2234             return 0;
2235         }
2236         assoc->backend = binitres->handle;
2237     }
2238     else
2239     {
2240         /* no backend. return error */
2241         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
2242         binitres->errstring = 0;
2243         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2244         iochan_settimeout(assoc->client_chan, 10);
2245     }
2246     if ((assoc->init->bend_sort))
2247         yaz_log (YLOG_DEBUG, "Sort handler installed");
2248     if ((assoc->init->bend_search))
2249         yaz_log (YLOG_DEBUG, "Search handler installed");
2250     if ((assoc->init->bend_present))
2251         yaz_log (YLOG_DEBUG, "Present handler installed");   
2252     if ((assoc->init->bend_esrequest))
2253         yaz_log (YLOG_DEBUG, "ESRequest handler installed");   
2254     if ((assoc->init->bend_delete))
2255         yaz_log (YLOG_DEBUG, "Delete handler installed");   
2256     if ((assoc->init->bend_scan))
2257         yaz_log (YLOG_DEBUG, "Scan handler installed");   
2258     if ((assoc->init->bend_segment))
2259         yaz_log (YLOG_DEBUG, "Segment handler installed");   
2260     
2261     resp->referenceId = req->referenceId;
2262     *options = '\0';
2263     /* let's tell the client what we can do */
2264     if (ODR_MASK_GET(req->options, Z_Options_search))
2265     {
2266         ODR_MASK_SET(resp->options, Z_Options_search);
2267         strcat(options, "srch");
2268     }
2269     if (ODR_MASK_GET(req->options, Z_Options_present))
2270     {
2271         ODR_MASK_SET(resp->options, Z_Options_present);
2272         strcat(options, " prst");
2273     }
2274     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2275         assoc->init->bend_delete)
2276     {
2277         ODR_MASK_SET(resp->options, Z_Options_delSet);
2278         strcat(options, " del");
2279     }
2280     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2281         assoc->init->bend_esrequest)
2282     {
2283         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2284         strcat (options, " extendedServices");
2285     }
2286     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2287     {
2288         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2289         strcat(options, " namedresults");
2290     }
2291     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2292     {
2293         ODR_MASK_SET(resp->options, Z_Options_scan);
2294         strcat(options, " scan");
2295     }
2296     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2297     {
2298         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2299         strcat(options, " concurrop");
2300     }
2301     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2302     {
2303         ODR_MASK_SET(resp->options, Z_Options_sort);
2304         strcat(options, " sort");
2305     }
2306
2307     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
2308         && assoc->init->charneg_response)
2309     {
2310         Z_OtherInformation **p;
2311         Z_OtherInformationUnit *p0;
2312         
2313         yaz_oi_APDU(apdu, &p);
2314         
2315         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2316             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2317             
2318             p0->which = Z_OtherInfo_externallyDefinedInfo;
2319             p0->information.externallyDefinedInfo =
2320                 assoc->init->charneg_response;
2321         }
2322         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2323         strcat(options, " negotiation");
2324     }
2325         
2326     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2327         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2328
2329     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2330     {
2331         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2332         assoc->version = 1; /* 1 & 2 are equivalent */
2333     }
2334     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2335     {
2336         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2337         assoc->version = 2;
2338     }
2339     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2340     {
2341         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2342         assoc->version = 3;
2343     }
2344
2345     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2346
2347     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2348         assoc->maximumRecordSize = *req->maximumRecordSize;
2349
2350     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2351         assoc->preferredMessageSize = *req->preferredMessageSize;
2352
2353     resp->preferredMessageSize = &assoc->preferredMessageSize;
2354     resp->maximumRecordSize = &assoc->maximumRecordSize;
2355
2356     resp->implementationId = odr_prepend(assoc->encode,
2357                 assoc->init->implementation_id,
2358                 resp->implementationId);
2359
2360     resp->implementationName = odr_prepend(assoc->encode,
2361                 assoc->init->implementation_name,
2362                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2363
2364     version = odr_strdup(assoc->encode, "$Revision: 1.103 $");
2365     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2366         version[strlen(version)-2] = '\0';
2367     resp->implementationVersion = odr_prepend(assoc->encode,
2368                 assoc->init->implementation_version,
2369                 odr_prepend(assoc->encode, &version[11],
2370                             resp->implementationVersion));
2371
2372     if (binitres->errcode)
2373     {
2374         assoc->state = ASSOC_DEAD;
2375         resp->userInformationField =
2376             init_diagnostics(assoc->encode, binitres->errcode,
2377                              binitres->errstring);
2378         *resp->result = 0;
2379     }
2380     if (log_request)
2381     {
2382         if (!req->idAuthentication)
2383             yaz_log(log_request, "Auth none");
2384         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2385         {
2386             const char *open = req->idAuthentication->u.open;
2387             const char *slash = strchr(open, '/');
2388             int len;
2389             if (slash)
2390                 len = slash - open;
2391             else
2392                 len = strlen(open);
2393                 yaz_log(log_request, "Auth open %.*s", len, open);
2394         }
2395         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2396         {
2397             const char *user = req->idAuthentication->u.idPass->userId;
2398             const char *group = req->idAuthentication->u.idPass->groupId;
2399             yaz_log(log_request, "Auth idPass %s %s",
2400                     user ? user : "-", group ? group : "-");
2401         }
2402         else if (req->idAuthentication->which 
2403                  == Z_IdAuthentication_anonymous)
2404         {
2405             yaz_log(log_request, "Auth anonymous");
2406         }
2407         else
2408         {
2409             yaz_log(log_request, "Auth other");
2410         }
2411     }
2412     if (log_request)
2413     {
2414         WRBUF wr = wrbuf_alloc();
2415         wrbuf_printf(wr, "Init ");
2416         if (binitres->errcode)
2417             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2418         else
2419             wrbuf_printf(wr, "OK -");
2420         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2421                      (req->implementationId ? req->implementationId :"-"), 
2422                      (req->implementationName ?
2423                       req->implementationName : "-"),
2424                      (req->implementationVersion ?
2425                       req->implementationVersion : "-")
2426             );
2427         yaz_log(log_request, "%s", wrbuf_buf(wr));
2428         wrbuf_free(wr, 1);
2429     }
2430     return apdu;
2431 }
2432
2433 /*
2434  * Set the specified `errcode' and `errstring' into a UserInfo-1
2435  * external to be returned to the client in accordance with Z35.90
2436  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2437  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2438  */
2439 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2440 {
2441     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2442         addinfo ? " -- " : "", addinfo ? addinfo : "");
2443     return zget_init_diagnostics(odr, error, addinfo);
2444 }
2445
2446 /*
2447  * nonsurrogate diagnostic record.
2448  */
2449 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2450 {
2451     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2452
2453     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2454             addinfo ? " -- " : "", addinfo ? addinfo : "");
2455
2456     rec->which = Z_Records_NSD;
2457     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2458                                                            error, addinfo);
2459     return rec;
2460 }
2461
2462 /*
2463  * surrogate diagnostic.
2464  */
2465 static Z_NamePlusRecord *surrogatediagrec(association *assoc, 
2466                                           const char *dbname,
2467                                           int error, const char *addinfo)
2468 {
2469     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2470             addinfo ? " -- " : "", addinfo ? addinfo : "");
2471     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2472 }
2473
2474 static Z_Records *pack_records(association *a, char *setname, int start,
2475                                int *num, Z_RecordComposition *comp,
2476                                int *next, int *pres, oid_value format,
2477                                Z_ReferenceId *referenceId,
2478                                int *oid, int *errcode)
2479 {
2480     int recno, total_length = 0, toget = *num, dumped_records = 0;
2481     Z_Records *records =
2482         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2483     Z_NamePlusRecordList *reclist =
2484         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2485     Z_NamePlusRecord **list =
2486         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2487
2488     records->which = Z_Records_DBOSD;
2489     records->u.databaseOrSurDiagnostics = reclist;
2490     reclist->num_records = 0;
2491     reclist->records = list;
2492     *pres = Z_PresentStatus_success;
2493     *num = 0;
2494     *next = 0;
2495
2496     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2497     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2498         a->maximumRecordSize);
2499     for (recno = start; reclist->num_records < toget; recno++)
2500     {
2501         bend_fetch_rr freq;
2502         Z_NamePlusRecord *thisrec;
2503         int this_length = 0;
2504         /*
2505          * we get the number of bytes allocated on the stream before any
2506          * allocation done by the backend - this should give us a reasonable
2507          * idea of the total size of the data so far.
2508          */
2509         total_length = odr_total(a->encode) - dumped_records;
2510         freq.errcode = 0;
2511         freq.errstring = 0;
2512         freq.basename = 0;
2513         freq.len = 0;
2514         freq.record = 0;
2515         freq.last_in_set = 0;
2516         freq.setname = setname;
2517         freq.surrogate_flag = 0;
2518         freq.number = recno;
2519         freq.comp = comp;
2520         freq.request_format = format;
2521         freq.request_format_raw = oid;
2522         freq.output_format = format;
2523         freq.output_format_raw = 0;
2524         freq.stream = a->encode;
2525         freq.print = a->print;
2526         freq.referenceId = referenceId;
2527         freq.schema = 0;
2528
2529         retrieve_fetch(a, &freq);
2530
2531         *next = freq.last_in_set ? 0 : recno + 1;
2532
2533         /* backend should be able to signal whether error is system-wide
2534            or only pertaining to current record */
2535         if (freq.errcode)
2536         {
2537             if (!freq.surrogate_flag)
2538             {
2539                 char s[20];
2540                 *pres = Z_PresentStatus_failure;
2541                 /* for 'present request out of range',
2542                    set addinfo to record position if not set */
2543                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  && 
2544                                 freq.errstring == 0)
2545                 {
2546                     sprintf (s, "%d", recno);
2547                     freq.errstring = s;
2548                 }
2549                 if (errcode)
2550                     *errcode = freq.errcode;
2551                 return diagrec(a, freq.errcode, freq.errstring);
2552             }
2553             reclist->records[reclist->num_records] =
2554                 surrogatediagrec(a, freq.basename, freq.errcode,
2555                                  freq.errstring);
2556             reclist->num_records++;
2557             continue;
2558         }
2559         if (freq.record == 0)  /* no error and no record ? */
2560         {
2561             *next = 0;   /* signal end-of-set and stop */
2562             break;
2563         }
2564         if (freq.len >= 0)
2565             this_length = freq.len;
2566         else
2567             this_length = odr_total(a->encode) - total_length - dumped_records;
2568         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2569             this_length, total_length, dumped_records);
2570         if (a->preferredMessageSize > 0 &&
2571                 this_length + total_length > a->preferredMessageSize)
2572         {
2573             /* record is small enough, really */
2574             if (this_length <= a->preferredMessageSize && recno > start)
2575             {
2576                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2577                 *pres = Z_PresentStatus_partial_2;
2578                 break;
2579             }
2580             /* record can only be fetched by itself */
2581             if (this_length < a->maximumRecordSize)
2582             {
2583                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2584                 if (toget > 1)
2585                 {
2586                     yaz_log(YLOG_DEBUG, "  Dropped it");
2587                     reclist->records[reclist->num_records] =
2588                          surrogatediagrec(a, freq.basename, 16, 0);
2589                     reclist->num_records++;
2590                     dumped_records += this_length;
2591                     continue;
2592                 }
2593             }
2594             else /* too big entirely */
2595             {
2596                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2597                         this_length, a->maximumRecordSize);
2598                 reclist->records[reclist->num_records] =
2599                     surrogatediagrec(a, freq.basename, 17, 0);
2600                 reclist->num_records++;
2601                 dumped_records += this_length;
2602                 continue;
2603             }
2604         }
2605
2606         if (!(thisrec = (Z_NamePlusRecord *)
2607               odr_malloc(a->encode, sizeof(*thisrec))))
2608             return 0;
2609         if (freq.basename)
2610             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2611         else
2612             thisrec->databaseName = 0;
2613         thisrec->which = Z_NamePlusRecord_databaseRecord;
2614
2615         if (freq.output_format_raw)
2616         {
2617             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
2618             freq.output_format = ident->value;
2619         }
2620         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
2621                                                  freq.record, freq.len);
2622         if (!thisrec->u.databaseRecord)
2623             return 0;
2624         reclist->records[reclist->num_records] = thisrec;
2625         reclist->num_records++;
2626     }
2627     *num = reclist->num_records;
2628     return records;
2629 }
2630
2631 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2632     int *fd)
2633 {
2634     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2635     bend_search_rr *bsrr = 
2636         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2637     
2638     yaz_log(log_requestdetail, "Got SearchRequest.");
2639     bsrr->fd = fd;
2640     bsrr->request = reqb;
2641     bsrr->association = assoc;
2642     bsrr->referenceId = req->referenceId;
2643     save_referenceId (reqb, bsrr->referenceId);
2644     bsrr->srw_sortKeys = 0;
2645     bsrr->srw_setname = 0;
2646     bsrr->srw_setnameIdleTime = 0;
2647
2648     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2649     if (req->databaseNames)
2650     {
2651         int i;
2652         for (i = 0; i < req->num_databaseNames; i++)
2653             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2654     }
2655
2656     yaz_log_zquery_level(log_requestdetail,req->query);
2657
2658     if (assoc->init->bend_search)
2659     {
2660         bsrr->setname = req->resultSetName;
2661         bsrr->replace_set = *req->replaceIndicator;
2662         bsrr->num_bases = req->num_databaseNames;
2663         bsrr->basenames = req->databaseNames;
2664         bsrr->query = req->query;
2665         bsrr->stream = assoc->encode;
2666         nmem_transfer(bsrr->stream->mem, reqb->request_mem);
2667         bsrr->decode = assoc->decode;
2668         bsrr->print = assoc->print;
2669         bsrr->hits = 0;
2670         bsrr->errcode = 0;
2671         bsrr->errstring = NULL;
2672         bsrr->search_info = NULL;
2673
2674         if (assoc->server && assoc->server->cql_transform 
2675             && req->query->which == Z_Query_type_104
2676             && req->query->u.type_104->which == Z_External_CQL)
2677         {
2678             /* have a CQL query and a CQL to PQF transform .. */
2679             int srw_errcode = 
2680                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2681                         assoc->server->cql_transform, bsrr->query);
2682             if (srw_errcode)
2683                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2684         }
2685         if (!bsrr->errcode)
2686             (assoc->init->bend_search)(assoc->backend, bsrr);
2687         if (!bsrr->request)  /* backend not ready with the search response */
2688             return 0;  /* should not be used any more */
2689     }
2690     else
2691     { 
2692         /* FIXME - make a diagnostic for it */
2693         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2694     }
2695     return response_searchRequest(assoc, reqb, bsrr, fd);
2696 }
2697
2698 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2699
2700 /*
2701  * Prepare a searchresponse based on the backend results. We probably want
2702  * to look at making the fetching of records nonblocking as well, but
2703  * so far, we'll keep things simple.
2704  * If bsrt is null, that means we're called in response to a communications
2705  * event, and we'll have to get the response for ourselves.
2706  */
2707 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2708     bend_search_rr *bsrt, int *fd)
2709 {
2710     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2711     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2712     Z_SearchResponse *resp = (Z_SearchResponse *)
2713         odr_malloc (assoc->encode, sizeof(*resp));
2714     int *nulint = odr_intdup (assoc->encode, 0);
2715     bool_t *sr = odr_intdup(assoc->encode, 1);
2716     int *next = odr_intdup(assoc->encode, 0);
2717     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2718     int returnedrecs=0;
2719
2720     apdu->which = Z_APDU_searchResponse;
2721     apdu->u.searchResponse = resp;
2722     resp->referenceId = req->referenceId;
2723     resp->additionalSearchInfo = 0;
2724     resp->otherInfo = 0;
2725     *fd = -1;
2726     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2727     {
2728         yaz_log(YLOG_FATAL, "Bad result from backend");
2729         return 0;
2730     }
2731     else if (bsrt->errcode)
2732     {
2733         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2734         resp->resultCount = nulint;
2735         resp->numberOfRecordsReturned = nulint;
2736         resp->nextResultSetPosition = nulint;
2737         resp->searchStatus = nulint;
2738         resp->resultSetStatus = none;
2739         resp->presentStatus = 0;
2740     }
2741     else
2742     {
2743         int *toget = odr_intdup(assoc->encode, 0);
2744         int *presst = odr_intdup(assoc->encode, 0);
2745         Z_RecordComposition comp, *compp = 0;
2746
2747         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2748
2749         resp->records = 0;
2750         resp->resultCount = &bsrt->hits;
2751
2752         comp.which = Z_RecordComp_simple;
2753         /* how many records does the user agent want, then? */
2754         if (bsrt->hits <= *req->smallSetUpperBound)
2755         {
2756             *toget = bsrt->hits;
2757             if ((comp.u.simple = req->smallSetElementSetNames))
2758                 compp = &comp;
2759         }
2760         else if (bsrt->hits < *req->largeSetLowerBound)
2761         {
2762             *toget = *req->mediumSetPresentNumber;
2763             if (*toget > bsrt->hits)
2764                 *toget = bsrt->hits;
2765             if ((comp.u.simple = req->mediumSetElementSetNames))
2766                 compp = &comp;
2767         }
2768         else
2769             *toget = 0;
2770
2771         if (*toget && !resp->records)
2772         {
2773             oident *prefformat;
2774             oid_value form;
2775
2776             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2777                 form = VAL_NONE;
2778             else
2779                 form = prefformat->value;
2780
2781             /* Call bend_present if defined */
2782             if (assoc->init->bend_present)
2783             {
2784                 bend_present_rr *bprr = (bend_present_rr *)
2785                     nmem_malloc (reqb->request_mem, sizeof(*bprr));
2786                 bprr->setname = req->resultSetName;
2787                 bprr->start = 1;
2788                 bprr->number = *toget;
2789                 bprr->format = form;
2790                 bprr->comp = compp;
2791                 bprr->referenceId = req->referenceId;
2792                 bprr->stream = assoc->encode;
2793                 bprr->print = assoc->print;
2794                 bprr->request = reqb;
2795                 bprr->association = assoc;
2796                 bprr->errcode = 0;
2797                 bprr->errstring = NULL;
2798                 (*assoc->init->bend_present)(assoc->backend, bprr);
2799
2800                 if (!bprr->request)
2801                     return 0;
2802                 if (bprr->errcode)
2803                 {
2804                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2805                     *resp->presentStatus = Z_PresentStatus_failure;
2806                 }
2807             }
2808
2809             if (!resp->records)
2810                 resp->records = pack_records(assoc, req->resultSetName, 1,
2811                                              toget, compp, next, presst, form, req->referenceId,
2812                                              req->preferredRecordSyntax, NULL);
2813             if (!resp->records)
2814                 return 0;
2815             resp->numberOfRecordsReturned = toget;
2816             returnedrecs = *toget;
2817             resp->nextResultSetPosition = next;
2818             resp->searchStatus = sr;
2819             resp->resultSetStatus = 0;
2820             resp->presentStatus = presst;
2821         }
2822         else
2823         {
2824             if (*resp->resultCount)
2825                 *next = 1;
2826             resp->numberOfRecordsReturned = nulint;
2827             resp->nextResultSetPosition = next;
2828             resp->searchStatus = sr;
2829             resp->resultSetStatus = 0;
2830             resp->presentStatus = 0;
2831         }
2832     }
2833     resp->additionalSearchInfo = bsrt->search_info;
2834
2835     if (log_request)
2836     {
2837         int i;
2838         WRBUF wr = wrbuf_alloc();
2839
2840         for (i = 0 ; i < req->num_databaseNames; i++){
2841             if (i)
2842                 wrbuf_printf(wr, "+");
2843             wrbuf_printf(wr, req->databaseNames[i]);
2844         }
2845         wrbuf_printf(wr, " ");
2846         
2847         if (bsrt->errcode)
2848             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2849         else
2850             wrbuf_printf(wr, "OK %d", bsrt->hits);
2851         wrbuf_printf(wr, " %s 1+%d ",
2852                      req->resultSetName, returnedrecs);
2853         yaz_query_to_wrbuf(wr, req->query);
2854         
2855         yaz_log(log_request, "Search %s", wrbuf_buf(wr));
2856         wrbuf_free(wr, 1);
2857     }
2858     return apdu;
2859 }
2860
2861 /*
2862  * Maybe we got a little over-friendly when we designed bend_fetch to
2863  * get only one record at a time. Some backends can optimise multiple-record
2864  * fetches, and at any rate, there is some overhead involved in
2865  * all that selecting and hopping around. Problem is, of course, that the
2866  * frontend can't know ahead of time how many records it'll need to
2867  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2868  * is downright lousy as a bulk data transfer protocol.
2869  *
2870  * To start with, we'll do the fetching of records from the backend
2871  * in one operation: To save some trips in and out of the event-handler,
2872  * and to simplify the interface to pack_records. At any rate, asynch
2873  * operation is more fun in operations that have an unpredictable execution
2874  * speed - which is normally more true for search than for present.
2875  */
2876 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2877                                       int *fd)
2878 {
2879     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2880     oident *prefformat;
2881     oid_value form;
2882     Z_APDU *apdu;
2883     Z_PresentResponse *resp;
2884     int *next;
2885     int *num;
2886     int errcode = 0;
2887     const char *errstring = 0;
2888
2889     yaz_log(log_requestdetail, "Got PresentRequest.");
2890
2891     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2892         form = VAL_NONE;
2893     else
2894         form = prefformat->value;
2895     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2896     resp->records = 0;
2897     resp->presentStatus = odr_intdup(assoc->encode, 0);
2898     if (assoc->init->bend_present)
2899     {
2900         bend_present_rr *bprr = (bend_present_rr *)
2901             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2902         bprr->setname = req->resultSetId;
2903         bprr->start = *req->resultSetStartPoint;
2904         bprr->number = *req->numberOfRecordsRequested;
2905         bprr->format = form;
2906         bprr->comp = req->recordComposition;
2907         bprr->referenceId = req->referenceId;
2908         bprr->stream = assoc->encode;
2909         bprr->print = assoc->print;
2910         bprr->request = reqb;
2911         bprr->association = assoc;
2912         bprr->errcode = 0;
2913         bprr->errstring = NULL;
2914         (*assoc->init->bend_present)(assoc->backend, bprr);
2915         
2916         if (!bprr->request)
2917             return 0; /* should not happen */
2918         if (bprr->errcode)
2919         {
2920             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2921             *resp->presentStatus = Z_PresentStatus_failure;
2922             errcode = bprr->errcode;
2923             errstring = bprr->errstring;
2924         }
2925     }
2926     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2927     next = odr_intdup(assoc->encode, 0);
2928     num = odr_intdup(assoc->encode, 0);
2929     
2930     apdu->which = Z_APDU_presentResponse;
2931     apdu->u.presentResponse = resp;
2932     resp->referenceId = req->referenceId;
2933     resp->otherInfo = 0;
2934     
2935     if (!resp->records)
2936     {
2937         *num = *req->numberOfRecordsRequested;
2938         resp->records =
2939             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2940                          num, req->recordComposition, next,
2941                          resp->presentStatus,
2942                          form, req->referenceId, req->preferredRecordSyntax, 
2943                          &errcode);
2944     }
2945     if (log_request)
2946     {
2947         WRBUF wr = wrbuf_alloc();
2948         wrbuf_printf(wr, "Present ");
2949
2950         if (*resp->presentStatus == Z_PresentStatus_failure)
2951             wrbuf_printf(wr, "ERROR %d ", errcode);
2952         else if (*resp->presentStatus == Z_PresentStatus_success)
2953             wrbuf_printf(wr, "OK -  ");
2954         else
2955             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2956
2957         wrbuf_printf(wr, " %s %d+%d ",
2958                 req->resultSetId, *req->resultSetStartPoint,
2959                 *req->numberOfRecordsRequested);
2960         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2961         wrbuf_free(wr, 1);
2962     }
2963     if (!resp->records)
2964         return 0;
2965     resp->numberOfRecordsReturned = num;
2966     resp->nextResultSetPosition = next;
2967     
2968     return apdu;
2969 }
2970
2971 /*
2972  * Scan was implemented rather in a hurry, and with support for only the basic
2973  * elements of the service in the backend API. Suggestions are welcome.
2974  */
2975 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2976 {
2977     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2978     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2979     Z_ScanResponse *res = (Z_ScanResponse *)
2980         odr_malloc (assoc->encode, sizeof(*res));
2981     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2982     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2983     Z_ListEntries *ents = (Z_ListEntries *)
2984         odr_malloc (assoc->encode, sizeof(*ents));
2985     Z_DiagRecs *diagrecs_p = NULL;
2986     oident *attset;
2987     bend_scan_rr *bsrr = (bend_scan_rr *)
2988         odr_malloc (assoc->encode, sizeof(*bsrr));
2989     struct scan_entry *save_entries;
2990
2991     yaz_log(log_requestdetail, "Got ScanRequest");
2992
2993     apdu->which = Z_APDU_scanResponse;
2994     apdu->u.scanResponse = res;
2995     res->referenceId = req->referenceId;
2996
2997     /* if step is absent, set it to 0 */
2998     res->stepSize = odr_intdup(assoc->encode, 0);
2999     if (req->stepSize)
3000         *res->stepSize = *req->stepSize;
3001
3002     res->scanStatus = scanStatus;
3003     res->numberOfEntriesReturned = numberOfEntriesReturned;
3004     res->positionOfTerm = 0;
3005     res->entries = ents;
3006     ents->num_entries = 0;
3007     ents->entries = NULL;
3008     ents->num_nonsurrogateDiagnostics = 0;
3009     ents->nonsurrogateDiagnostics = NULL;
3010     res->attributeSet = 0;
3011     res->otherInfo = 0;
3012
3013     if (req->databaseNames)
3014     {
3015         int i;
3016         for (i = 0; i < req->num_databaseNames; i++)
3017             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
3018     }
3019     bsrr->scanClause = 0;
3020     bsrr->errcode = 0;
3021     bsrr->errstring = 0;
3022     bsrr->num_bases = req->num_databaseNames;
3023     bsrr->basenames = req->databaseNames;
3024     bsrr->num_entries = *req->numberOfTermsRequested;
3025     bsrr->term = req->termListAndStartPoint;
3026     bsrr->referenceId = req->referenceId;
3027     bsrr->stream = assoc->encode;
3028     bsrr->print = assoc->print;
3029     bsrr->step_size = res->stepSize;
3030     bsrr->entries = 0;
3031     /* For YAZ 2.0 and earlier it was the backend handler that
3032        initialized entries (member display_term did not exist)
3033        YAZ 2.0 and later sets 'entries'  and initialize all members
3034        including 'display_term'. If YAZ 2.0 or later sees that
3035        entries was modified - we assume that it is an old handler and
3036        that 'display_term' is _not_ set.
3037     */
3038     if (bsrr->num_entries > 0) 
3039     {
3040         int i;
3041         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3042                                    bsrr->num_entries);
3043         for (i = 0; i<bsrr->num_entries; i++)
3044         {
3045             bsrr->entries[i].term = 0;
3046             bsrr->entries[i].occurrences = 0;
3047             bsrr->entries[i].errcode = 0;
3048             bsrr->entries[i].errstring = 0;
3049             bsrr->entries[i].display_term = 0;
3050         }
3051     }
3052     save_entries = bsrr->entries;  /* save it so we can compare later */
3053
3054     if (req->attributeSet &&
3055         (attset = oid_getentbyoid(req->attributeSet)) &&
3056         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
3057         bsrr->attributeset = attset->value;
3058     else
3059         bsrr->attributeset = VAL_NONE;
3060     log_scan_term_level (log_requestdetail, req->termListAndStartPoint, 
3061             bsrr->attributeset);
3062     bsrr->term_position = req->preferredPositionInResponse ?
3063         *req->preferredPositionInResponse : 1;
3064
3065     ((int (*)(void *, bend_scan_rr *))
3066      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3067
3068     if (bsrr->errcode)
3069         diagrecs_p = zget_DiagRecs(assoc->encode,
3070                                    bsrr->errcode, bsrr->errstring);
3071     else
3072     {
3073         int i;
3074         Z_Entry **tab = (Z_Entry **)
3075             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
3076         
3077         if (bsrr->status == BEND_SCAN_PARTIAL)
3078             *scanStatus = Z_Scan_partial_5;
3079         else
3080             *scanStatus = Z_Scan_success;
3081         ents->entries = tab;
3082         ents->num_entries = bsrr->num_entries;
3083         res->numberOfEntriesReturned = &ents->num_entries;          
3084         res->positionOfTerm = &bsrr->term_position;
3085         for (i = 0; i < bsrr->num_entries; i++)
3086         {
3087             Z_Entry *e;
3088             Z_TermInfo *t;
3089             Odr_oct *o;
3090             
3091             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3092             if (bsrr->entries[i].occurrences >= 0)
3093             {
3094                 e->which = Z_Entry_termInfo;
3095                 e->u.termInfo = t = (Z_TermInfo *)
3096                     odr_malloc(assoc->encode, sizeof(*t));
3097                 t->suggestedAttributes = 0;
3098                 t->displayTerm = 0;
3099                 if (save_entries == bsrr->entries && 
3100                     bsrr->entries[i].display_term)
3101                 {
3102                     /* the entries was _not_ set by the handler. So it's
3103                        safe to test for new member display_term. It is
3104                        NULL'ed by us.
3105                     */
3106                     t->displayTerm = odr_strdup(assoc->encode,
3107                                                 bsrr->entries[i].display_term);
3108                 }
3109                 t->alternativeTerm = 0;
3110                 t->byAttributes = 0;
3111                 t->otherTermInfo = 0;
3112                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3113                 t->term = (Z_Term *)
3114                     odr_malloc(assoc->encode, sizeof(*t->term));
3115                 t->term->which = Z_Term_general;
3116                 t->term->u.general = o =
3117                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3118                 o->buf = (unsigned char *)
3119                     odr_malloc(assoc->encode, o->len = o->size =
3120                                strlen(bsrr->entries[i].term));
3121                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3122                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3123                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3124             }
3125             else
3126             {
3127                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3128                                                   bsrr->entries[i].errcode,
3129                                                   bsrr->entries[i].errstring);
3130                 assert (drecs->num_diagRecs == 1);
3131                 e->which = Z_Entry_surrogateDiagnostic;
3132                 assert (drecs->diagRecs[0]);
3133                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3134             }
3135         }
3136     }
3137     if (diagrecs_p)
3138     {
3139         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3140         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3141     }
3142     if (log_request)
3143     {
3144         int i;
3145         WRBUF wr = wrbuf_alloc();
3146         wrbuf_printf(wr, "Scan ");
3147         for (i = 0 ; i < req->num_databaseNames; i++){
3148             if (i)
3149                 wrbuf_printf(wr, "+");
3150             wrbuf_printf(wr, req->databaseNames[i]);
3151         }
3152         wrbuf_printf(wr, " ");
3153         
3154         if (bsrr->errcode){
3155             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3156             wrbuf_printf(wr, " ");
3157         }
3158         else
3159             wrbuf_printf(wr, "OK "); 
3160         /* else if (*res->scanStatus == Z_Scan_success) */
3161         /*    wrbuf_printf(wr, "OK "); */
3162         /* else */
3163         /* wrbuf_printf(wr, "Partial "); */
3164
3165         if (*res->numberOfEntriesReturned)
3166             wrbuf_printf(wr, "%d - ", *res->numberOfEntriesReturned);
3167         else
3168             wrbuf_printf(wr, "0 - ");
3169
3170         wrbuf_printf(wr, "%d+%d+%d ",
3171                      (req->preferredPositionInResponse ?
3172                       *req->preferredPositionInResponse : 1),
3173                      *req->numberOfTermsRequested,
3174                      (res->stepSize ? *res->stepSize : 1));
3175
3176         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint, 
3177                           bsrr->attributeset);
3178         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3179         wrbuf_free(wr, 1);
3180     }
3181     return apdu;
3182 }
3183
3184 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3185     int *fd)
3186 {
3187     int i;
3188     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3189     Z_SortResponse *res = (Z_SortResponse *)
3190         odr_malloc (assoc->encode, sizeof(*res));
3191     bend_sort_rr *bsrr = (bend_sort_rr *)
3192         odr_malloc (assoc->encode, sizeof(*bsrr));
3193
3194     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3195
3196     yaz_log(log_requestdetail, "Got SortRequest.");
3197
3198     bsrr->num_input_setnames = req->num_inputResultSetNames;
3199     for (i=0;i<req->num_inputResultSetNames;i++)
3200         yaz_log(log_requestdetail, "Input resultset: '%s'",
3201                 req->inputResultSetNames[i]);
3202     bsrr->input_setnames = req->inputResultSetNames;
3203     bsrr->referenceId = req->referenceId;
3204     bsrr->output_setname = req->sortedResultSetName;
3205     yaz_log(log_requestdetail, "Output resultset: '%s'",
3206                 req->sortedResultSetName);
3207     bsrr->sort_sequence = req->sortSequence;
3208        /*FIXME - dump those sequences too */
3209     bsrr->stream = assoc->encode;
3210     bsrr->print = assoc->print;
3211
3212     bsrr->sort_status = Z_SortResponse_failure;
3213     bsrr->errcode = 0;
3214     bsrr->errstring = 0;
3215     
3216     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3217     
3218     res->referenceId = bsrr->referenceId;
3219     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3220     res->resultSetStatus = 0;
3221     if (bsrr->errcode)
3222     {
3223         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3224                                        bsrr->errcode, bsrr->errstring);
3225         res->diagnostics = dr->diagRecs;
3226         res->num_diagnostics = dr->num_diagRecs;
3227     }
3228     else
3229     {
3230         res->num_diagnostics = 0;
3231         res->diagnostics = 0;
3232     }
3233     res->resultCount = 0;
3234     res->otherInfo = 0;
3235
3236     apdu->which = Z_APDU_sortResponse;
3237     apdu->u.sortResponse = res;
3238     if (log_request)
3239     {
3240         WRBUF wr = wrbuf_alloc();
3241         wrbuf_printf(wr, "Sort ");
3242         if (bsrr->errcode)
3243             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3244         else
3245             wrbuf_printf(wr,  "OK -");
3246         wrbuf_printf(wr, " (");
3247         for (i = 0; i<req->num_inputResultSetNames; i++)
3248         {
3249             if (i)
3250                 wrbuf_printf(wr, "+");
3251             wrbuf_printf(wr, req->inputResultSetNames[i]);
3252         }
3253         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3254
3255         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3256         wrbuf_free(wr, 1);
3257     }
3258     return apdu;
3259 }
3260
3261 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3262     int *fd)
3263 {
3264     int i;
3265     Z_DeleteResultSetRequest *req =
3266         reqb->apdu_request->u.deleteResultSetRequest;
3267     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3268         odr_malloc (assoc->encode, sizeof(*res));
3269     bend_delete_rr *bdrr = (bend_delete_rr *)
3270         odr_malloc (assoc->encode, sizeof(*bdrr));
3271     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3272
3273     yaz_log(log_requestdetail, "Got DeleteRequest.");
3274
3275     bdrr->num_setnames = req->num_resultSetList;
3276     bdrr->setnames = req->resultSetList;
3277     for (i = 0; i<req->num_resultSetList; i++)
3278         yaz_log(log_requestdetail, "resultset: '%s'",
3279                 req->resultSetList[i]);
3280     bdrr->stream = assoc->encode;
3281     bdrr->print = assoc->print;
3282     bdrr->function = *req->deleteFunction;
3283     bdrr->referenceId = req->referenceId;
3284     bdrr->statuses = 0;
3285     if (bdrr->num_setnames > 0)
3286     {
3287         bdrr->statuses = (int*) 
3288             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3289                        bdrr->num_setnames);
3290         for (i = 0; i < bdrr->num_setnames; i++)
3291             bdrr->statuses[i] = 0;
3292     }
3293     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3294     
3295     res->referenceId = req->referenceId;
3296
3297     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3298
3299     res->deleteListStatuses = 0;
3300     if (bdrr->num_setnames > 0)
3301     {
3302         int i;
3303         res->deleteListStatuses = (Z_ListStatuses *)
3304             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3305         res->deleteListStatuses->num = bdrr->num_setnames;
3306         res->deleteListStatuses->elements =
3307             (Z_ListStatus **)
3308             odr_malloc (assoc->encode, 
3309                         sizeof(*res->deleteListStatuses->elements) *
3310                         bdrr->num_setnames);
3311         for (i = 0; i<bdrr->num_setnames; i++)
3312         {
3313             res->deleteListStatuses->elements[i] =
3314                 (Z_ListStatus *)
3315                 odr_malloc (assoc->encode,
3316                             sizeof(**res->deleteListStatuses->elements));
3317             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3318             res->deleteListStatuses->elements[i]->id =
3319                 odr_strdup (assoc->encode, bdrr->setnames[i]);
3320         }
3321     }
3322     res->numberNotDeleted = 0;
3323     res->bulkStatuses = 0;
3324     res->deleteMessage = 0;
3325     res->otherInfo = 0;
3326
3327     apdu->which = Z_APDU_deleteResultSetResponse;
3328     apdu->u.deleteResultSetResponse = res;
3329     if (log_request)
3330     {
3331         WRBUF wr = wrbuf_alloc();
3332         wrbuf_printf(wr, "Delete ");
3333         if (bdrr->delete_status)
3334             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3335         else
3336             wrbuf_printf(wr, "OK -");
3337         for (i = 0; i<req->num_resultSetList; i++)
3338             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3339         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3340         wrbuf_free(wr, 1);
3341     }
3342     return apdu;
3343 }
3344
3345 static void process_close(association *assoc, request *reqb)
3346 {
3347     Z_Close *req = reqb->apdu_request->u.close;
3348     static char *reasons[] =
3349     {
3350         "finished",
3351         "shutdown",
3352         "systemProblem",
3353         "costLimit",
3354         "resources",
3355         "securityViolation",
3356         "protocolError",
3357         "lackOfActivity",
3358         "peerAbort",
3359         "unspecified"
3360     };
3361
3362     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3363         reasons[*req->closeReason], req->diagnosticInformation ?
3364         req->diagnosticInformation : "NULL");
3365     if (assoc->version < 3) /* to make do_force respond with close */
3366         assoc->version = 3;
3367     do_close_req(assoc, Z_Close_finished,
3368                  "Association terminated by client", reqb);
3369     yaz_log(log_request,"Close OK");
3370 }
3371
3372 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3373 {
3374     if (refid)
3375     {
3376         reqb->len_refid = refid->len;
3377         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3378         memcpy (reqb->refid, refid->buf, refid->len);
3379     }
3380     else
3381     {
3382         reqb->len_refid = 0;
3383         reqb->refid = NULL;
3384     }
3385 }