Minor formatting changes.
[yaz-moved-to-github.git] / src / seshigh.c
1 /* This file is part of the YAZ toolkit.
2  * Copyright (C) 1995-2008 Index Data
3  * See the file LICENSE for details.
4  */
5 /**
6  * \file seshigh.c
7  * \brief Implements GFS session logic.
8  *
9  * Frontend server logic.
10  *
11  * This code receives incoming APDUs, and handles client requests by means
12  * of the backend API.
13  *
14  * Some of the code is getting quite involved, compared to simpler servers -
15  * primarily because it is asynchronous both in the communication with
16  * the user and the backend. We think the complexity will pay off in
17  * the form of greater flexibility when more asynchronous facilities
18  * are implemented.
19  *
20  * Memory management has become somewhat involved. In the simple case, where
21  * only one PDU is pending at a time, it will simply reuse the same memory,
22  * once it has found its working size. When we enable multiple concurrent
23  * operations, perhaps even with multiple parallel calls to the backend, it
24  * will maintain a pool of buffers for encoding and decoding, trying to
25  * minimize memory allocation/deallocation during normal operation.
26  *
27  */
28
29 #include <stdlib.h>
30 #include <stdio.h>
31 #include <assert.h>
32 #include <ctype.h>
33
34 #if HAVE_SYS_TYPES_H
35 #include <sys/types.h>
36 #endif
37 #if HAVE_SYS_STAT_H
38 #include <sys/stat.h>
39 #endif
40
41 #ifdef WIN32
42 #include <io.h>
43 #define S_ISREG(x) (x & _S_IFREG)
44 #include <process.h>
45 #endif
46
47 #if HAVE_UNISTD_H
48 #include <unistd.h>
49 #endif
50
51 #if YAZ_HAVE_XML2
52 #include <libxml/parser.h>
53 #include <libxml/tree.h>
54 #endif
55
56 #include <yaz/yconfig.h>
57 #include <yaz/xmalloc.h>
58 #include <yaz/comstack.h>
59 #include "eventl.h"
60 #include "session.h"
61 #include "mime.h"
62 #include <yaz/proto.h>
63 #include <yaz/oid_db.h>
64 #include <yaz/log.h>
65 #include <yaz/logrpn.h>
66 #include <yaz/querytowrbuf.h>
67 #include <yaz/statserv.h>
68 #include <yaz/diagbib1.h>
69 #include <yaz/charneg.h>
70 #include <yaz/otherinfo.h>
71 #include <yaz/yaz-util.h>
72 #include <yaz/pquery.h>
73 #include <yaz/oid_db.h>
74
75 #include <yaz/srw.h>
76 #include <yaz/backend.h>
77 #include <yaz/yaz-ccl.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 int ir_read(IOCHAN h, int event)
269 {
270     association *assoc = (association *)iochan_getdata(h);
271     COMSTACK conn = assoc->client_link;
272     request *req;
273     
274     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
275     {
276         yaz_log(YLOG_DEBUG, "ir_session (input)");
277         /* We aren't speaking to this fellow */
278         if (assoc->state == ASSOC_DEAD)
279         {
280             yaz_log(log_sessiondetail, "Connection closed - end of session");
281             cs_close(conn);
282             destroy_association(assoc);
283             iochan_destroy(h);
284             return 0;
285         }
286         assoc->cs_get_mask = EVENT_INPUT;
287
288         do
289         {
290             int res = cs_get(conn, &assoc->input_buffer,
291                              &assoc->input_buffer_len);
292             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
293             {
294                 yaz_log(log_session, "Connection error: %s res=%d",
295                         cs_errmsg(cs_errno(conn)), res);
296                 req = request_get(&assoc->incoming); /* get a new request */
297                 do_close_req(assoc, Z_Close_protocolError, 
298                              "Incoming package too large", req);
299                 return 0;
300             }
301             else if (res <= 0)
302             {
303                 yaz_log(log_session, "Connection closed by client");
304                 assoc->state = ASSOC_DEAD;
305                 return 0;
306             }
307             else if (res == 1) /* incomplete read - wait for more  */
308             {
309                 if (conn->io_pending & CS_WANT_WRITE)
310                     assoc->cs_get_mask |= EVENT_OUTPUT;
311                 iochan_setflag(h, assoc->cs_get_mask);
312                 return 0;
313             }
314             /* we got a complete PDU. Let's decode it */
315             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
316                     assoc->input_buffer[0] & 0xff,
317                     assoc->input_buffer[1] & 0xff,
318                     assoc->input_buffer[2] & 0xff);
319             req = request_get(&assoc->incoming); /* get a new request */
320             odr_reset(assoc->decode);
321             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
322             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
323             {
324                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
325                         "[near byte %ld] ",
326                         odr_errmsg(odr_geterror(assoc->decode)),
327                         odr_getelement(assoc->decode),
328                         (long) odr_offset(assoc->decode));
329                 if (assoc->decode->error != OHTTP)
330                 {
331                     yaz_log(YLOG_WARN, "PDU dump:");
332                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
333                     request_release(req);
334                     do_close(assoc, Z_Close_protocolError, "Malformed package");
335                 }
336                 else
337                 {
338                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
339                     assoc->state = ASSOC_DEAD;
340                     process_gdu_response(assoc, req, p);
341                 }
342                 return 0;
343             }
344             req->request_mem = odr_extract_mem(assoc->decode);
345             if (assoc->print) 
346             {
347                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
348                     yaz_log(YLOG_WARN, "ODR print error: %s", 
349                             odr_errmsg(odr_geterror(assoc->print)));
350                 odr_reset(assoc->print);
351             }
352             request_enq(&assoc->incoming, req);
353         }
354         while (cs_more(conn));
355     }
356     return 1;
357 }
358
359 /*
360  * This is where PDUs from the client are read and the further
361  * processing is initiated. Flow of control moves down through the
362  * various process_* functions below, until the encoded result comes back up
363  * to the output handler in here.
364  * 
365  *  h     : the I/O channel that has an outstanding event.
366  *  event : the current outstanding event.
367  */
368 void ir_session(IOCHAN h, int event)
369 {
370     int res;
371     association *assoc = (association *)iochan_getdata(h);
372     COMSTACK conn = assoc->client_link;
373     request *req;
374
375     assert(h && conn && assoc);
376     if (event == EVENT_TIMEOUT)
377     {
378         if (assoc->state != ASSOC_UP)
379         {
380             yaz_log(YLOG_DEBUG, "Final timeout - closing connection.");
381             /* do we need to lod this at all */
382             cs_close(conn);
383             destroy_association(assoc);
384             iochan_destroy(h);
385         }
386         else
387         {
388             yaz_log(log_sessiondetail, 
389                     "Session idle too long. Sending close.");
390             do_close(assoc, Z_Close_lackOfActivity, 0);
391         }
392         return;
393     }
394     if (event & assoc->cs_accept_mask)
395     {
396         if (!cs_accept(conn))
397         {
398             yaz_log(YLOG_WARN, "accept failed");
399             destroy_association(assoc);
400             iochan_destroy(h);
401         }
402         iochan_clearflag(h, EVENT_OUTPUT);
403         if (conn->io_pending) 
404         {   /* cs_accept didn't complete */
405             assoc->cs_accept_mask = 
406                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
407                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
408
409             iochan_setflag(h, assoc->cs_accept_mask);
410         }
411         else
412         {   /* cs_accept completed. Prepare for reading (cs_get) */
413             assoc->cs_accept_mask = 0;
414             assoc->cs_get_mask = EVENT_INPUT;
415             iochan_setflag(h, assoc->cs_get_mask);
416         }
417         return;
418     }
419     if (event & assoc->cs_get_mask) /* input */
420     {
421         if (!ir_read(h, event))
422             return;
423         req = request_head(&assoc->incoming);
424         if (req->state == REQUEST_IDLE)
425         {
426             request_deq(&assoc->incoming);
427             process_gdu_request(assoc, req);
428         }
429     }
430     if (event & assoc->cs_put_mask)
431     {
432         request *req = request_head(&assoc->outgoing);
433
434         assoc->cs_put_mask = 0;
435         yaz_log(YLOG_DEBUG, "ir_session (output)");
436         req->state = REQUEST_PENDING;
437         switch (res = cs_put(conn, req->response, req->len_response))
438         {
439         case -1:
440             yaz_log(log_sessiondetail, "Connection closed by client");
441             cs_close(conn);
442             destroy_association(assoc);
443             iochan_destroy(h);
444             break;
445         case 0: /* all sent - release the request structure */
446             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
447 #if 0
448             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
449                     req->response);
450 #endif
451             nmem_destroy(req->request_mem);
452             request_deq(&assoc->outgoing);
453             request_release(req);
454             if (!request_head(&assoc->outgoing))
455             {   /* restore mask for cs_get operation ... */
456                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
457                 iochan_setflag(h, assoc->cs_get_mask);
458                 if (assoc->state == ASSOC_DEAD)
459                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
460             }
461             else
462             {
463                 assoc->cs_put_mask = EVENT_OUTPUT;
464             }
465             break;
466         default:
467             if (conn->io_pending & CS_WANT_WRITE)
468                 assoc->cs_put_mask |= EVENT_OUTPUT;
469             if (conn->io_pending & CS_WANT_READ)
470                 assoc->cs_put_mask |= EVENT_INPUT;
471             iochan_setflag(h, assoc->cs_put_mask);
472         }
473     }
474     if (event & EVENT_EXCEPT)
475     {
476         yaz_log(YLOG_WARN, "ir_session (exception)");
477         cs_close(conn);
478         destroy_association(assoc);
479         iochan_destroy(h);
480     }
481 }
482
483 static int process_z_request(association *assoc, request *req, char **msg);
484
485
486 static void assoc_init_reset(association *assoc)
487 {
488     xfree (assoc->init);
489     assoc->init = (bend_initrequest *) xmalloc(sizeof(*assoc->init));
490
491     assoc->init->stream = assoc->encode;
492     assoc->init->print = assoc->print;
493     assoc->init->auth = 0;
494     assoc->init->referenceId = 0;
495     assoc->init->implementation_version = 0;
496     assoc->init->implementation_id = 0;
497     assoc->init->implementation_name = 0;
498     assoc->init->query_charset = 0;
499     assoc->init->records_in_same_charset = 0;
500     assoc->init->bend_sort = NULL;
501     assoc->init->bend_search = NULL;
502     assoc->init->bend_present = NULL;
503     assoc->init->bend_esrequest = NULL;
504     assoc->init->bend_delete = NULL;
505     assoc->init->bend_scan = NULL;
506     assoc->init->bend_segment = NULL;
507     assoc->init->bend_fetch = NULL;
508     assoc->init->bend_explain = NULL;
509     assoc->init->bend_srw_scan = NULL;
510     assoc->init->bend_srw_update = NULL;
511
512     assoc->init->charneg_request = NULL;
513     assoc->init->charneg_response = NULL;
514
515     assoc->init->decode = assoc->decode;
516     assoc->init->peer_name = 
517         odr_strdup(assoc->encode, cs_addrstr(assoc->client_link));
518
519     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
520 }
521
522 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
523 {
524     statserv_options_block *cb = statserv_getcontrol();
525     if (!assoc->init)
526     {
527         const char *encoding = "UTF-8";
528         Z_External *ce;
529         bend_initresult *binitres;
530
531         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
532         assoc_init_reset(assoc);
533         
534         if (sr->username)
535         {
536             Z_IdAuthentication *auth = (Z_IdAuthentication *)
537                 odr_malloc(assoc->decode, sizeof(*auth));
538             int len;
539
540             len = strlen(sr->username) + 1;
541             if (sr->password) 
542                 len += strlen(sr->password) + 2;
543             auth->which = Z_IdAuthentication_open;
544             auth->u.open = (char *) odr_malloc(assoc->decode, len);
545             strcpy(auth->u.open, sr->username);
546             if (sr->password && *sr->password)
547             {
548                 strcat(auth->u.open, "/");
549                 strcat(auth->u.open, sr->password);
550             }
551             assoc->init->auth = auth;
552         }
553
554 #if 1
555         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
556         assoc->init->charneg_request = ce->u.charNeg3;
557 #endif
558         assoc->backend = 0;
559         if (!(binitres = (*cb->bend_init)(assoc->init)))
560         {
561             assoc->state = ASSOC_DEAD;
562             yaz_add_srw_diagnostic(assoc->encode, d, num,
563                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
564             return 0;
565         }
566         assoc->backend = binitres->handle;
567         assoc->init->auth = 0;
568         if (binitres->errcode)
569         {
570             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
571             assoc->state = ASSOC_DEAD;
572             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
573                                    binitres->errstring);
574             return 0;
575         }
576         return 1;
577     }
578     return 1;
579 }
580
581 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
582 {
583 #if YAZ_HAVE_XML2
584     yaz_record_conv_t rc = 0;
585     const char *match_schema = 0;
586     Odr_oid *match_syntax = 0;
587
588     if (assoc->server)
589     {
590         int r;
591         const char *input_schema = yaz_get_esn(rr->comp);
592         Odr_oid *input_syntax_raw = rr->request_format;
593         
594         const char *backend_schema = 0;
595         Odr_oid *backend_syntax = 0;
596
597         r = yaz_retrieval_request(assoc->server->retrieval,
598                                   input_schema,
599                                   input_syntax_raw,
600                                   &match_schema,
601                                   &match_syntax,
602                                   &rc,
603                                   &backend_schema,
604                                   &backend_syntax);
605         if (r == -1) /* error ? */
606         {
607             const char *details = yaz_retrieval_get_error(
608                 assoc->server->retrieval);
609
610             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
611             if (details)
612                 rr->errstring = odr_strdup(rr->stream, details);
613             return -1;
614         }
615         else if (r == 1 || r == 3)
616         {
617             const char *details = input_schema;
618             rr->errcode =
619                 YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
620             if (details)
621                 rr->errstring = odr_strdup(rr->stream, details);
622             return -1;
623         }
624         else if (r == 2)
625         {
626             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
627             if (input_syntax_raw)
628             {
629                 char oidbuf[OID_STR_MAX];
630                 oid_oid_to_dotstring(input_syntax_raw, oidbuf);
631                 rr->errstring = odr_strdup(rr->stream, oidbuf);
632             }
633             return -1;
634         }
635         if (backend_schema)
636         {
637             yaz_set_esn(&rr->comp, backend_schema, odr_getmem(rr->stream));
638         }
639         if (backend_syntax)
640             rr->request_format = backend_syntax;
641     }
642     (*assoc->init->bend_fetch)(assoc->backend, rr);
643     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
644     {   /* post conversion must take place .. */
645         WRBUF output_record = wrbuf_alloc();
646         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
647         if (r)
648         {
649             const char *details = yaz_record_conv_get_error(rc);
650             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
651             if (details)
652                 rr->errstring = odr_strdup(rr->stream, details);
653         }
654         else
655         {
656             rr->len = wrbuf_len(output_record);
657             rr->record = (char *) odr_malloc(rr->stream, rr->len);
658             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
659         }
660         wrbuf_destroy(output_record);
661     }
662     if (match_syntax)
663         rr->output_format = match_syntax;
664     if (match_schema)
665         rr->schema = odr_strdup(rr->stream, match_schema);
666     return 0;
667 #else
668     (*assoc->init->bend_fetch)(assoc->backend, rr);
669 #endif
670     return 0;
671 }
672
673 static int srw_bend_fetch(association *assoc, int pos,
674                           Z_SRW_searchRetrieveRequest *srw_req,
675                           Z_SRW_record *record,
676                           const char **addinfo)
677 {
678     bend_fetch_rr rr;
679     ODR o = assoc->encode;
680
681     rr.setname = "default";
682     rr.number = pos;
683     rr.referenceId = 0;
684     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
685
686     rr.comp = (Z_RecordComposition *)
687             odr_malloc(assoc->decode, sizeof(*rr.comp));
688     rr.comp->which = Z_RecordComp_complex;
689     rr.comp->u.complex = (Z_CompSpec *)
690             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
691     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
692         odr_malloc(assoc->encode, sizeof(bool_t));
693     *rr.comp->u.complex->selectAlternativeSyntax = 0;    
694     rr.comp->u.complex->num_dbSpecific = 0;
695     rr.comp->u.complex->dbSpecific = 0;
696     rr.comp->u.complex->num_recordSyntax = 0; 
697     rr.comp->u.complex->recordSyntax = 0;
698
699     rr.comp->u.complex->generic = (Z_Specification *) 
700             odr_malloc(assoc->decode, sizeof(Z_Specification));
701
702     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
703     rr.comp->u.complex->generic->which = Z_Schema_uri;
704     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
705
706     /* ESN = recordSchema if recordSchema is present */
707     rr.comp->u.complex->generic->elementSpec = 0;
708     if (srw_req->recordSchema)
709     {
710         rr.comp->u.complex->generic->elementSpec = 
711             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
712         rr.comp->u.complex->generic->elementSpec->which = 
713             Z_ElementSpec_elementSetName;
714         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
715             srw_req->recordSchema;
716     }
717     
718     rr.stream = assoc->encode;
719     rr.print = assoc->print;
720
721     rr.basename = 0;
722     rr.len = 0;
723     rr.record = 0;
724     rr.last_in_set = 0;
725     rr.errcode = 0;
726     rr.errstring = 0;
727     rr.surrogate_flag = 0;
728     rr.schema = srw_req->recordSchema;
729
730     if (!assoc->init->bend_fetch)
731         return 1;
732
733     retrieve_fetch(assoc, &rr);
734
735     if (rr.errcode && rr.surrogate_flag)
736     {
737         int code = yaz_diag_bib1_to_srw(rr.errcode);
738         yaz_mk_sru_surrogate(o, record, pos, code, rr.errstring);
739         return 0;
740     }
741     else if (rr.len >= 0)
742     {
743         record->recordData_buf = rr.record;
744         record->recordData_len = rr.len;
745         record->recordPosition = odr_intdup(o, pos);
746         record->recordSchema = odr_strdup_null(
747             o, rr.schema ? rr.schema : srw_req->recordSchema);
748     }
749     if (rr.errcode)
750     {
751         *addinfo = rr.errstring;
752         return rr.errcode;
753     }
754     return 0;
755 }
756
757 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
758                    Z_Query *query_result)
759 {
760     /* have a CQL query and  CQL to PQF transform .. */
761     CQL_parser cp = cql_parser_create();
762     int r;
763     int srw_errcode = 0;
764     const char *add = 0;
765     char rpn_buf[5120];
766             
767     r = cql_parser_string(cp, cql);
768     if (r)
769     {
770         srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
771     }
772     if (!r)
773     {
774         /* Syntax OK */
775         r = cql_transform_buf(ct,
776                               cql_parser_result(cp),
777                               rpn_buf, sizeof(rpn_buf)-1);
778         if (r)
779             srw_errcode = cql_transform_error(ct, &add);
780     }
781     if (!r)
782     {
783         /* Syntax & transform OK. */
784         /* Convert PQF string to Z39.50 to RPN query struct */
785         YAZ_PQF_Parser pp = yaz_pqf_create();
786         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
787         if (!rpnquery)
788         {
789             size_t off;
790             const char *pqf_msg;
791             int code = yaz_pqf_error(pp, &pqf_msg, &off);
792             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
793                     pqf_msg, code);
794             srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
795         }
796         else
797         {
798             query_result->which = Z_Query_type_1;
799             query_result->u.type_1 = rpnquery;
800         }
801         yaz_pqf_destroy(pp);
802     }
803     cql_parser_destroy(cp);
804     return srw_errcode;
805 }
806
807 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
808                         Z_AttributesPlusTerm *result)
809 {
810     Z_Query query;
811     Z_RPNQuery *rpn;
812     int srw_error = cql2pqf(odr, cql, ct, &query);
813     if (srw_error)
814         return srw_error;
815     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
816         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* bad query type */
817     rpn = query.u.type_1;
818     if (!rpn->RPNStructure) 
819         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be structure */
820     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
821         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be simple */
822     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
823         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be be attributes + term */
824     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
825            sizeof(*result));
826     return 0;
827 }
828                    
829
830 static int ccl2pqf(ODR odr, const Odr_oct *ccl, CCL_bibset bibset,
831                    bend_search_rr *bsrr) {
832     char *ccl0;
833     struct ccl_rpn_node *node;
834     int errcode, pos;
835
836     ccl0 = odr_strdupn(odr, (char*) ccl->buf, ccl->len);
837     if ((node = ccl_find_str(bibset, ccl0, &errcode, &pos)) == 0) {
838         bsrr->errstring = (char*) ccl_err_msg(errcode);
839         return YAZ_SRW_QUERY_SYNTAX_ERROR;    /* Query syntax error */
840     }
841
842     bsrr->query->which = Z_Query_type_1;
843     bsrr->query->u.type_1 = ccl_rpn_query(odr, node);
844     return 0;
845 }
846
847
848 static void srw_bend_search(association *assoc, request *req,
849                             Z_SRW_PDU *sr,
850                             Z_SRW_searchRetrieveResponse *srw_res,
851                             int *http_code)
852 {
853     int srw_error = 0;
854     Z_External *ext;
855     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
856     
857     *http_code = 200;
858     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
859     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
860     if (srw_res->num_diagnostics == 0 && assoc->init)
861     {
862         bend_search_rr rr;
863         rr.setname = "default";
864         rr.replace_set = 1;
865         rr.num_bases = 1;
866         rr.basenames = &srw_req->database;
867         rr.referenceId = 0;
868         rr.srw_sortKeys = 0;
869         rr.srw_setname = 0;
870         rr.srw_setnameIdleTime = 0;
871         rr.estimated_hit_count = 0;
872         rr.partial_resultset = 0;
873         rr.query = (Z_Query *) odr_malloc(assoc->decode, sizeof(*rr.query));
874         rr.query->u.type_1 = 0;
875         
876         if (srw_req->query_type == Z_SRW_query_type_cql)
877         {
878             if (assoc->server && assoc->server->cql_transform)
879             {
880                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
881                                           assoc->server->cql_transform,
882                                           rr.query);
883                 if (srw_errcode)
884                 {
885                     yaz_add_srw_diagnostic(assoc->encode,
886                                            &srw_res->diagnostics,
887                                            &srw_res->num_diagnostics,
888                                            srw_errcode, 0);
889                 }
890             }
891             else
892             {
893                 /* CQL query to backend. Wrap it - Z39.50 style */
894                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
895                 ext->direct_reference = odr_getoidbystr(assoc->decode, 
896                                                         "1.2.840.10003.16.2");
897                 ext->indirect_reference = 0;
898                 ext->descriptor = 0;
899                 ext->which = Z_External_CQL;
900                 ext->u.cql = srw_req->query.cql;
901                 
902                 rr.query->which = Z_Query_type_104;
903                 rr.query->u.type_104 =  ext;
904             }
905         }
906         else if (srw_req->query_type == Z_SRW_query_type_pqf)
907         {
908             Z_RPNQuery *RPNquery;
909             YAZ_PQF_Parser pqf_parser;
910             
911             pqf_parser = yaz_pqf_create();
912             
913             RPNquery = yaz_pqf_parse(pqf_parser, assoc->decode,
914                                      srw_req->query.pqf);
915             if (!RPNquery)
916             {
917                 const char *pqf_msg;
918                 size_t off;
919                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
920                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
921                         code, pqf_msg, (long) off);
922                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
923             }
924             
925             rr.query->which = Z_Query_type_1;
926             rr.query->u.type_1 =  RPNquery;
927             
928             yaz_pqf_destroy(pqf_parser);
929         }
930         else
931         {
932             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
933                                    &srw_res->num_diagnostics,
934                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
935         }
936         if (rr.query->u.type_1)
937         {
938             rr.stream = assoc->encode;
939             rr.decode = assoc->decode;
940             rr.print = assoc->print;
941             rr.request = req;
942             if ( srw_req->sort.sortKeys )
943                 rr.srw_sortKeys = odr_strdup(assoc->encode, 
944                                              srw_req->sort.sortKeys );
945             rr.association = assoc;
946             rr.fd = 0;
947             rr.hits = 0;
948             rr.errcode = 0;
949             rr.errstring = 0;
950             rr.search_info = 0;
951             yaz_log_zquery_level(log_requestdetail,rr.query);
952             
953             (assoc->init->bend_search)(assoc->backend, &rr);
954             if (rr.errcode)
955             {
956                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
957                 {
958                     *http_code = 404;
959                 }
960                 else
961                 {
962                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
963                     yaz_add_srw_diagnostic(assoc->encode,
964                                            &srw_res->diagnostics,
965                                            &srw_res->num_diagnostics,
966                                            srw_error, rr.errstring);
967                 }
968             }
969             else
970             {
971                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
972                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
973                 
974                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
975                         start, number, rr.hits);
976                 
977                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
978                 if (rr.srw_setname)
979                 {
980                     srw_res->resultSetId =
981                         odr_strdup(assoc->encode, rr.srw_setname );
982                     srw_res->resultSetIdleTime =
983                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
984                 }
985                 
986                 if (start > rr.hits || start < 1)
987                 {
988                     /* if hits<=0 and start=1 we don't return a diagnostic */
989                     if (start != 1)
990                         yaz_add_srw_diagnostic(
991                             assoc->encode, 
992                             &srw_res->diagnostics, &srw_res->num_diagnostics,
993                             YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
994                 }
995                 else if (number > 0)
996                 {
997                     int i;
998                     int ok = 1;
999                     if (start + number > rr.hits)
1000                         number = rr.hits - start + 1;
1001                     
1002                     /* Call bend_present if defined */
1003                     if (assoc->init->bend_present)
1004                     {
1005                         bend_present_rr *bprr = (bend_present_rr*)
1006                             odr_malloc(assoc->decode, sizeof(*bprr));
1007                         bprr->setname = "default";
1008                         bprr->start = start;
1009                         bprr->number = number;
1010                         if (srw_req->recordSchema)
1011                         {
1012                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1013                                                                             sizeof(*bprr->comp));
1014                             bprr->comp->which = Z_RecordComp_simple;
1015                             bprr->comp->u.simple = (Z_ElementSetNames *)
1016                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1017                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1018                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1019                         }
1020                         else
1021                         {
1022                             bprr->comp = 0;
1023                         }
1024                         bprr->stream = assoc->encode;
1025                         bprr->referenceId = 0;
1026                         bprr->print = assoc->print;
1027                         bprr->request = req;
1028                         bprr->association = assoc;
1029                         bprr->errcode = 0;
1030                         bprr->errstring = NULL;
1031                         (*assoc->init->bend_present)(assoc->backend, bprr);
1032                         
1033                         if (!bprr->request)
1034                             return;
1035                         if (bprr->errcode)
1036                         {
1037                             srw_error = yaz_diag_bib1_to_srw(bprr->errcode);
1038                             yaz_add_srw_diagnostic(assoc->encode,
1039                                                    &srw_res->diagnostics,
1040                                                    &srw_res->num_diagnostics,
1041                                                    srw_error, bprr->errstring);
1042                             ok = 0;
1043                         }
1044                     }
1045                     
1046                     if (ok)
1047                     {
1048                         int j = 0;
1049                         int packing = Z_SRW_recordPacking_string;
1050                         if (srw_req->recordPacking)
1051                         {
1052                             packing = 
1053                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1054                             if (packing == -1)
1055                                 packing = Z_SRW_recordPacking_string;
1056                         }
1057                         srw_res->records = (Z_SRW_record *)
1058                             odr_malloc(assoc->encode,
1059                                        number * sizeof(*srw_res->records));
1060                         
1061                         srw_res->extra_records = (Z_SRW_extra_record **)
1062                             odr_malloc(assoc->encode,
1063                                        number*sizeof(*srw_res->extra_records));
1064
1065                         for (i = 0; i<number; i++)
1066                         {
1067                             int errcode;
1068                             const char *addinfo = 0;
1069                             
1070                             srw_res->records[j].recordPacking = packing;
1071                             srw_res->records[j].recordData_buf = 0;
1072                             srw_res->extra_records[j] = 0;
1073                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1074                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1075                                                      srw_res->records + j,
1076                                                      &addinfo);
1077                             if (errcode)
1078                             {
1079                                 yaz_add_srw_diagnostic(assoc->encode,
1080                                                        &srw_res->diagnostics,
1081                                                        &srw_res->num_diagnostics,
1082                                                        yaz_diag_bib1_to_srw(errcode),
1083                                                        addinfo);
1084                                 
1085                                 break;
1086                             }
1087                             if (srw_res->records[j].recordData_buf)
1088                                 j++;
1089                         }
1090                         srw_res->num_records = j;
1091                         if (!j)
1092                             srw_res->records = 0;
1093                     }
1094                 }
1095                 if (rr.estimated_hit_count || rr.partial_resultset)
1096                 {
1097                     yaz_add_srw_diagnostic(
1098                         assoc->encode,
1099                         &srw_res->diagnostics,
1100                         &srw_res->num_diagnostics,
1101                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1102                         0);
1103                 }
1104             }
1105         }
1106     }
1107     if (log_request)
1108     {
1109         const char *querystr = "?";
1110         const char *querytype = "?";
1111         WRBUF wr = wrbuf_alloc();
1112
1113         switch (srw_req->query_type)
1114         {
1115         case Z_SRW_query_type_cql:
1116             querytype = "CQL";
1117             querystr = srw_req->query.cql;
1118             break;
1119         case Z_SRW_query_type_pqf:
1120             querytype = "PQF";
1121             querystr = srw_req->query.pqf;
1122             break;
1123         }
1124         wrbuf_printf(wr, "SRWSearch ");
1125         wrbuf_printf(wr, srw_req->database);
1126         wrbuf_printf(wr, " ");
1127         if (srw_res->num_diagnostics)
1128             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1129         else if (*http_code != 200)
1130             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1131         else if (srw_res->numberOfRecords)
1132         {
1133             wrbuf_printf(wr, "OK %d",
1134                          (srw_res->numberOfRecords ?
1135                           *srw_res->numberOfRecords : 0));
1136         }
1137         wrbuf_printf(wr, " %s %d+%d", 
1138                      (srw_res->resultSetId ?
1139                       srw_res->resultSetId : "-"),
1140                      (srw_req->startRecord ? *srw_req->startRecord : 1), 
1141                      srw_res->num_records);
1142         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), querytype, querystr);
1143         wrbuf_destroy(wr);
1144     }
1145 }
1146
1147 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1148 {
1149 #if YAZ_HAVE_XML2
1150     xmlNodePtr ptr = (xmlNode *) rr->server_node_ptr;
1151     if (!ptr)
1152         return 0;
1153     for (ptr = ptr->children; ptr; ptr = ptr->next)
1154     {
1155         if (ptr->type != XML_ELEMENT_NODE)
1156             continue;
1157         if (!strcmp((const char *) ptr->name, "explain"))
1158         {
1159             int len;
1160             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1161             xmlChar *buf_out;
1162             char *content;
1163
1164             ptr = xmlCopyNode(ptr, 1);
1165         
1166             xmlDocSetRootElement(doc, ptr);
1167             
1168             xmlDocDumpMemory(doc, &buf_out, &len);
1169             content = (char*) odr_malloc(rr->stream, 1+len);
1170             memcpy(content, buf_out, len);
1171             content[len] = '\0';
1172             
1173             xmlFree(buf_out);
1174             xmlFreeDoc(doc);
1175             rr->explain_buf = content;
1176             return 0;
1177         }
1178     }
1179 #endif
1180     return 0;
1181 }
1182
1183 static void srw_bend_explain(association *assoc, request *req,
1184                              Z_SRW_PDU *sr,
1185                              Z_SRW_explainResponse *srw_res,
1186                              int *http_code)
1187 {
1188     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1189     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1190     *http_code = 404;
1191     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1192     if (assoc->init)
1193     {
1194         bend_explain_rr rr;
1195         
1196         rr.stream = assoc->encode;
1197         rr.decode = assoc->decode;
1198         rr.print = assoc->print;
1199         rr.explain_buf = 0;
1200         rr.database = srw_req->database;
1201         if (assoc->server)
1202             rr.server_node_ptr = assoc->server->server_node_ptr;
1203         else
1204             rr.server_node_ptr = 0;
1205         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1206         if (assoc->init->bend_explain)
1207             (*assoc->init->bend_explain)(assoc->backend, &rr);
1208         else
1209             srw_bend_explain_default(assoc->backend, &rr);
1210
1211         if (rr.explain_buf)
1212         {
1213             int packing = Z_SRW_recordPacking_string;
1214             if (srw_req->recordPacking)
1215             {
1216                 packing = 
1217                     yaz_srw_str_to_pack(srw_req->recordPacking);
1218                 if (packing == -1)
1219                     packing = Z_SRW_recordPacking_string;
1220             }
1221             srw_res->record.recordSchema = rr.schema;
1222             srw_res->record.recordPacking = packing;
1223             srw_res->record.recordData_buf = rr.explain_buf;
1224             srw_res->record.recordData_len = strlen(rr.explain_buf);
1225             srw_res->record.recordPosition = 0;
1226             *http_code = 200;
1227         }
1228     }
1229 }
1230
1231 static void srw_bend_scan(association *assoc, request *req,
1232                           Z_SRW_PDU *sr,
1233                           Z_SRW_scanResponse *srw_res,
1234                           int *http_code)
1235 {
1236     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1237     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1238
1239     *http_code = 200;
1240     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1241     if (srw_res->num_diagnostics == 0 && assoc->init)
1242     {
1243         struct scan_entry *save_entries;
1244
1245         bend_scan_rr *bsrr = (bend_scan_rr *)
1246             odr_malloc(assoc->encode, sizeof(*bsrr));
1247         bsrr->num_bases = 1;
1248         bsrr->basenames = &srw_req->database;
1249
1250         bsrr->num_entries = srw_req->maximumTerms ?
1251             *srw_req->maximumTerms : 10;
1252         bsrr->term_position = srw_req->responsePosition ?
1253             *srw_req->responsePosition : 1;
1254
1255         bsrr->errcode = 0;
1256         bsrr->errstring = 0;
1257         bsrr->referenceId = 0;
1258         bsrr->stream = assoc->encode;
1259         bsrr->print = assoc->print;
1260         bsrr->step_size = odr_intdup(assoc->decode, 0);
1261         bsrr->entries = 0;
1262         bsrr->setname = 0;
1263
1264         if (bsrr->num_entries > 0) 
1265         {
1266             int i;
1267             bsrr->entries = (struct scan_entry *) 
1268                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1269                            bsrr->num_entries);
1270             for (i = 0; i<bsrr->num_entries; i++)
1271             {
1272                 bsrr->entries[i].term = 0;
1273                 bsrr->entries[i].occurrences = 0;
1274                 bsrr->entries[i].errcode = 0;
1275                 bsrr->entries[i].errstring = 0;
1276                 bsrr->entries[i].display_term = 0;
1277             }
1278         }
1279         save_entries = bsrr->entries;  /* save it so we can compare later */
1280
1281         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1282             assoc->init->bend_scan)
1283         {
1284             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1285             
1286             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1287                                       &bsrr->attributeset, 
1288                                       srw_req->scanClause.pqf); 
1289             yaz_pqf_destroy(pqf_parser);
1290             bsrr->scanClause = 0;
1291             ((int (*)(void *, bend_scan_rr *))
1292              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1293         }
1294         else if (srw_req->query_type == Z_SRW_query_type_cql
1295                  && assoc->init->bend_scan && assoc->server
1296                  && assoc->server->cql_transform)
1297         {
1298             int srw_error;
1299             bsrr->scanClause = 0;
1300             bsrr->attributeset = 0;
1301             bsrr->term = (Z_AttributesPlusTerm *)
1302                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1303             srw_error = cql2pqf_scan(assoc->encode,
1304                                      srw_req->scanClause.cql,
1305                                      assoc->server->cql_transform,
1306                                      bsrr->term);
1307             if (srw_error)
1308                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1309                                        &srw_res->num_diagnostics,
1310                                        srw_error, 0);
1311             else
1312             {
1313                 ((int (*)(void *, bend_scan_rr *))
1314                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1315             }
1316         }
1317         else if (srw_req->query_type == Z_SRW_query_type_cql
1318                  && assoc->init->bend_srw_scan)
1319         {
1320             bsrr->term = 0;
1321             bsrr->attributeset = 0;
1322             bsrr->scanClause = srw_req->scanClause.cql;
1323             ((int (*)(void *, bend_scan_rr *))
1324              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1325         }
1326         else
1327         {
1328             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1329                                    &srw_res->num_diagnostics,
1330                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1331         }
1332         if (bsrr->errcode)
1333         {
1334             int srw_error;
1335             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1336             {
1337                 *http_code = 404;
1338                 return;
1339             }
1340             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1341
1342             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1343                                    &srw_res->num_diagnostics,
1344                                    srw_error, bsrr->errstring);
1345         }
1346         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1347         {
1348             int i;
1349             srw_res->terms = (Z_SRW_scanTerm*)
1350                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1351                            bsrr->num_entries);
1352
1353             srw_res->num_terms =  bsrr->num_entries;
1354             for (i = 0; i<bsrr->num_entries; i++)
1355             {
1356                 Z_SRW_scanTerm *t = srw_res->terms + i;
1357                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1358                 t->numberOfRecords =
1359                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1360                 t->displayTerm = 0;
1361                 if (save_entries == bsrr->entries && 
1362                     bsrr->entries[i].display_term)
1363                 {
1364                     /* the entries was _not_ set by the handler. So it's
1365                        safe to test for new member display_term. It is
1366                        NULL'ed by us.
1367                     */
1368                     t->displayTerm = odr_strdup(assoc->encode, 
1369                                                 bsrr->entries[i].display_term);
1370                 }
1371                 t->whereInList = 0;
1372             }
1373         }
1374     }
1375     if (log_request)
1376     {
1377         WRBUF wr = wrbuf_alloc();
1378         const char *querytype = 0;
1379         const char *querystr = 0;
1380
1381         switch(srw_req->query_type)
1382         {
1383         case Z_SRW_query_type_pqf:
1384             querytype = "PQF";
1385             querystr = srw_req->scanClause.pqf;
1386             break;
1387         case Z_SRW_query_type_cql:
1388             querytype = "CQL";
1389             querystr = srw_req->scanClause.cql;
1390             break;
1391         default:
1392             querytype = "UNKNOWN";
1393             querystr = "";
1394         }
1395
1396         wrbuf_printf(wr, "SRWScan ");
1397         wrbuf_printf(wr, srw_req->database);
1398         wrbuf_printf(wr, " ");
1399
1400         if (srw_res->num_diagnostics)
1401             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1402         else if (srw_res->num_terms)
1403             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1404         else
1405             wrbuf_printf(wr, "OK - - ");
1406
1407         wrbuf_printf(wr, "%d+%d+0 ",
1408                      (srw_req->responsePosition ? 
1409                       *srw_req->responsePosition : 1),
1410                      (srw_req->maximumTerms ?
1411                       *srw_req->maximumTerms : 1));
1412         /* there is no step size in SRU/W ??? */
1413         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1414         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1415         wrbuf_destroy(wr);
1416     }
1417
1418 }
1419
1420 static void srw_bend_update(association *assoc, request *req,
1421                             Z_SRW_PDU *sr,
1422                             Z_SRW_updateResponse *srw_res,
1423                             int *http_code)
1424 {
1425     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1426     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1427     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1428     *http_code = 404;
1429     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1430     if (assoc->init)
1431     {
1432         bend_update_rr rr;
1433         Z_SRW_extra_record *extra = srw_req->extra_record;
1434         
1435         rr.stream = assoc->encode;
1436         rr.print = assoc->print;
1437         rr.num_bases = 1;
1438         rr.basenames = &srw_req->database;
1439         rr.operation = srw_req->operation;
1440         rr.operation_status = "failed";
1441         rr.record_id = 0;
1442         rr.record_versions = 0;
1443         rr.num_versions = 0;
1444         rr.record_packing = "string";
1445         rr.record_schema = 0;
1446         rr.record_data = 0;
1447         rr.extra_record_data = 0;
1448         rr.extra_request_data = 0;
1449         rr.extra_response_data = 0;
1450         rr.uri = 0;
1451         rr.message = 0;
1452         rr.details = 0;
1453         
1454         *http_code = 200;
1455         if (rr.operation == 0)
1456         {
1457             yaz_add_sru_update_diagnostic(
1458                 assoc->encode, &srw_res->diagnostics,
1459                 &srw_res->num_diagnostics,
1460                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1461                 "action" );
1462             return;
1463         }
1464         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1465         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1466         if (!strcmp( rr.operation, "delete"))
1467         {
1468             if (srw_req->record && !srw_req->record->recordSchema)
1469             {
1470                 rr.record_schema = odr_strdup(
1471                     assoc->encode,
1472                     srw_req->record->recordSchema);
1473             }
1474             if (srw_req->record)
1475             {
1476                 rr.record_data = odr_strdupn(
1477                     assoc->encode, 
1478                     srw_req->record->recordData_buf,
1479                     srw_req->record->recordData_len );
1480             }
1481             if (extra && extra->extraRecordData_len)
1482             {
1483                 rr.extra_record_data = odr_strdupn(
1484                     assoc->encode, 
1485                     extra->extraRecordData_buf,
1486                     extra->extraRecordData_len );
1487             }
1488             if (srw_req->recordId)
1489                 rr.record_id = srw_req->recordId;
1490             else if (extra && extra->recordIdentifier)
1491                 rr.record_id = extra->recordIdentifier;
1492         }
1493         else if (!strcmp(rr.operation, "replace"))
1494         {
1495             if (srw_req->recordId)
1496                 rr.record_id = srw_req->recordId;
1497             else if (extra && extra->recordIdentifier)
1498                 rr.record_id = extra->recordIdentifier;
1499             else 
1500             {
1501                 yaz_add_sru_update_diagnostic(
1502                     assoc->encode, &srw_res->diagnostics,
1503                     &srw_res->num_diagnostics,
1504                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1505                     "recordIdentifier");
1506             }
1507             if (!srw_req->record)
1508             {
1509                 yaz_add_sru_update_diagnostic(
1510                     assoc->encode, &srw_res->diagnostics,
1511                     &srw_res->num_diagnostics,
1512                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1513                     "record");
1514             }
1515             else 
1516             {
1517                 if (srw_req->record->recordSchema)
1518                     rr.record_schema = odr_strdup(
1519                         assoc->encode, srw_req->record->recordSchema);
1520                 if (srw_req->record->recordData_len )
1521                 {
1522                     rr.record_data = odr_strdupn(assoc->encode, 
1523                                                  srw_req->record->recordData_buf,
1524                                                  srw_req->record->recordData_len );
1525                 }
1526                 else 
1527                 {
1528                     yaz_add_sru_update_diagnostic(
1529                         assoc->encode, &srw_res->diagnostics,
1530                         &srw_res->num_diagnostics,
1531                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,                                              
1532                         "recordData" );
1533                 }
1534             }
1535             if (extra && extra->extraRecordData_len)
1536             {
1537                 rr.extra_record_data = odr_strdupn(
1538                     assoc->encode, 
1539                     extra->extraRecordData_buf,
1540                     extra->extraRecordData_len );
1541             }
1542         }
1543         else if (!strcmp(rr.operation, "insert"))
1544         {
1545             if (srw_req->recordId)
1546                 rr.record_id = srw_req->recordId; 
1547             else if (extra)
1548                 rr.record_id = extra->recordIdentifier;
1549             
1550             if (srw_req->record)
1551             {
1552                 if (srw_req->record->recordSchema)
1553                     rr.record_schema = odr_strdup(
1554                         assoc->encode, srw_req->record->recordSchema);
1555             
1556                 if (srw_req->record->recordData_len)
1557                     rr.record_data = odr_strdupn(
1558                         assoc->encode, 
1559                         srw_req->record->recordData_buf,
1560                         srw_req->record->recordData_len );
1561             }
1562             if (extra && extra->extraRecordData_len)
1563             {
1564                 rr.extra_record_data = odr_strdupn(
1565                     assoc->encode, 
1566                     extra->extraRecordData_buf,
1567                     extra->extraRecordData_len );
1568             }
1569         }
1570         else 
1571             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1572                                           &srw_res->num_diagnostics,
1573                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1574                                           rr.operation );
1575
1576         if (srw_req->record)
1577         {
1578             const char *pack_str = 
1579                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1580             if (pack_str)
1581                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1582         }
1583
1584         if (srw_req->num_recordVersions)
1585         {
1586             rr.record_versions = srw_req->recordVersions;
1587             rr.num_versions = srw_req->num_recordVersions;
1588         }
1589         if (srw_req->extraRequestData_len)
1590         {
1591             rr.extra_request_data = odr_strdupn(assoc->encode,
1592                                                 srw_req->extraRequestData_buf,
1593                                                 srw_req->extraRequestData_len );
1594         }
1595         if (srw_res->num_diagnostics == 0)
1596         {
1597             if ( assoc->init->bend_srw_update)
1598                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1599             else 
1600                 yaz_add_sru_update_diagnostic(
1601                     assoc->encode, &srw_res->diagnostics,
1602                     &srw_res->num_diagnostics,
1603                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1604                     "No Update backend handler");
1605         }
1606
1607         if (rr.uri)
1608             yaz_add_srw_diagnostic_uri(assoc->encode,
1609                                        &srw_res->diagnostics,
1610                                        &srw_res->num_diagnostics,
1611                                        rr.uri, 
1612                                        rr.message,
1613                                        rr.details);
1614         srw_res->recordId = rr.record_id;
1615         srw_res->operationStatus = rr.operation_status;
1616         srw_res->recordVersions = rr.record_versions;
1617         srw_res->num_recordVersions = rr.num_versions;
1618         if (srw_res->extraResponseData_len)
1619         {
1620             srw_res->extraResponseData_buf = rr.extra_response_data;
1621             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1622         }
1623         if (srw_res->num_diagnostics == 0 && rr.record_data)
1624         {
1625             srw_res->record = yaz_srw_get_record(assoc->encode);
1626             srw_res->record->recordSchema = rr.record_schema;
1627             if (rr.record_packing)
1628             {
1629                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1630
1631                 if (pack == -1)
1632                 {
1633                     pack = Z_SRW_recordPacking_string;
1634                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1635                             rr.record_packing);
1636                 }
1637                 srw_res->record->recordPacking = pack;
1638             }
1639             srw_res->record->recordData_buf = rr.record_data;
1640             srw_res->record->recordData_len = strlen(rr.record_data);
1641             if (rr.extra_record_data)
1642             {
1643                 Z_SRW_extra_record *ex = 
1644                     yaz_srw_get_extra_record(assoc->encode);
1645                 srw_res->extra_record = ex;
1646                 ex->extraRecordData_buf = rr.extra_record_data;
1647                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1648             }
1649         }
1650     }
1651 }
1652
1653 /* check if path is OK (1); BAD (0) */
1654 static int check_path(const char *path)
1655 {
1656     if (*path != '/')
1657         return 0;
1658     if (strstr(path, ".."))
1659         return 0;
1660     return 1;
1661 }
1662
1663 static char *read_file(const char *fname, ODR o, int *sz)
1664 {
1665     char *buf;
1666     FILE *inf = fopen(fname, "rb");
1667     if (!inf)
1668         return 0;
1669
1670     fseek(inf, 0L, SEEK_END);
1671     *sz = ftell(inf);
1672     rewind(inf);
1673     buf = (char *) odr_malloc(o, *sz);
1674     fread(buf, 1, *sz, inf);
1675     fclose(inf);
1676     return buf;     
1677 }
1678
1679 static void process_http_request(association *assoc, request *req)
1680 {
1681     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1682     ODR o = assoc->encode;
1683     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1684     Z_SRW_PDU *sr = 0;
1685     Z_SOAP *soap_package = 0;
1686     Z_GDU *p = 0;
1687     char *charset = 0;
1688     Z_HTTP_Response *hres = 0;
1689     int keepalive = 1;
1690     const char *stylesheet = 0; /* for now .. set later */
1691     Z_SRW_diagnostic *diagnostic = 0;
1692     int num_diagnostic = 0;
1693     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1694
1695     if (!control_association(assoc, host, 0))
1696     {
1697         p = z_get_HTTP_Response(o, 404);
1698         r = 1;
1699     }
1700     if (r == 2 && assoc->server && assoc->server->docpath
1701         && hreq->path[0] == '/' 
1702         && 
1703         /* check if path is a proper prefix of documentroot */
1704         strncmp(hreq->path+1, assoc->server->docpath,
1705                 strlen(assoc->server->docpath))
1706         == 0)
1707     {   
1708         if (!check_path(hreq->path))
1709         {
1710             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1711             p = z_get_HTTP_Response(o, 404);
1712         }
1713         else
1714         {
1715             int content_size = 0;
1716             char *content_buf = read_file(hreq->path+1, o, &content_size);
1717             if (!content_buf)
1718             {
1719                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1720                 p = z_get_HTTP_Response(o, 404);
1721             }
1722             else
1723             {
1724                 const char *ctype = 0;
1725                 yaz_mime_types types = yaz_mime_types_create();
1726                 
1727                 yaz_mime_types_add(types, "xsl", "application/xml");
1728                 yaz_mime_types_add(types, "xml", "application/xml");
1729                 yaz_mime_types_add(types, "css", "text/css");
1730                 yaz_mime_types_add(types, "html", "text/html");
1731                 yaz_mime_types_add(types, "htm", "text/html");
1732                 yaz_mime_types_add(types, "txt", "text/plain");
1733                 yaz_mime_types_add(types, "js", "application/x-javascript");
1734                 
1735                 yaz_mime_types_add(types, "gif", "image/gif");
1736                 yaz_mime_types_add(types, "png", "image/png");
1737                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1738                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1739                 
1740                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1741                 if (!ctype)
1742                 {
1743                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1744                     p = z_get_HTTP_Response(o, 404);
1745                 }
1746                 else
1747                 {
1748                     p = z_get_HTTP_Response(o, 200);
1749                     hres = p->u.HTTP_Response;
1750                     hres->content_buf = content_buf;
1751                     hres->content_len = content_size;
1752                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1753                 }
1754                 yaz_mime_types_destroy(types);
1755             }
1756         }
1757         r = 1;
1758     }
1759
1760     if (r == 2)
1761     {
1762         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1763         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1764     }
1765     if (r == 2)  /* not taken */
1766     {
1767         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1768                            &diagnostic, &num_diagnostic);
1769         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1770     }
1771     if (r == 0)  /* decode SRW/SRU OK .. */
1772     {
1773         int http_code = 200;
1774         if (sr->which == Z_SRW_searchRetrieve_request)
1775         {
1776             Z_SRW_PDU *res =
1777                 yaz_srw_get_pdu(assoc->encode, Z_SRW_searchRetrieve_response,
1778                                 sr->srw_version);
1779             stylesheet = sr->u.request->stylesheet;
1780             if (num_diagnostic)
1781             {
1782                 res->u.response->diagnostics = diagnostic;
1783                 res->u.response->num_diagnostics = num_diagnostic;
1784             }
1785             else
1786             {
1787                 srw_bend_search(assoc, req, sr, res->u.response, 
1788                                 &http_code);
1789             }
1790             if (http_code == 200)
1791                 soap_package->u.generic->p = res;
1792         }
1793         else if (sr->which == Z_SRW_explain_request)
1794         {
1795             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_explain_response,
1796                                              sr->srw_version);
1797             stylesheet = sr->u.explain_request->stylesheet;
1798             if (num_diagnostic)
1799             {   
1800                 res->u.explain_response->diagnostics = diagnostic;
1801                 res->u.explain_response->num_diagnostics = num_diagnostic;
1802             }
1803             srw_bend_explain(assoc, req, sr,
1804                              res->u.explain_response, &http_code);
1805             if (http_code == 200)
1806                 soap_package->u.generic->p = res;
1807         }
1808         else if (sr->which == Z_SRW_scan_request)
1809         {
1810             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_scan_response,
1811                                              sr->srw_version);
1812             stylesheet = sr->u.scan_request->stylesheet;
1813             if (num_diagnostic)
1814             {   
1815                 res->u.scan_response->diagnostics = diagnostic;
1816                 res->u.scan_response->num_diagnostics = num_diagnostic;
1817             }
1818             srw_bend_scan(assoc, req, sr,
1819                           res->u.scan_response, &http_code);
1820             if (http_code == 200)
1821                 soap_package->u.generic->p = res;
1822         }
1823         else if (sr->which == Z_SRW_update_request)
1824         {
1825             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1826                                              sr->srw_version);
1827             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1828             if (num_diagnostic)
1829             {   
1830                 res->u.update_response->diagnostics = diagnostic;
1831                 res->u.update_response->num_diagnostics = num_diagnostic;
1832             }
1833             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1834             srw_bend_update(assoc, req, sr,
1835                             res->u.update_response, &http_code);
1836             if (http_code == 200)
1837                 soap_package->u.generic->p = res;
1838         }
1839         else
1840         {
1841             yaz_log(log_request, "SOAP ERROR"); 
1842             /* FIXME - what error, what query */
1843             http_code = 500;
1844             z_soap_error(assoc->encode, soap_package,
1845                          "SOAP-ENV:Client", "Bad method", 0); 
1846         }
1847         if (http_code == 200 || http_code == 500)
1848         {
1849             static Z_SOAP_Handler soap_handlers[4] = {
1850 #if YAZ_HAVE_XML2
1851                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1852                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1853                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1854 #endif
1855                 {0, 0, 0}
1856             };
1857             char ctype[80];
1858             int ret;
1859             p = z_get_HTTP_Response(o, 200);
1860             hres = p->u.HTTP_Response;
1861
1862             if (!stylesheet && assoc->server)
1863                 stylesheet = assoc->server->stylesheet;
1864
1865             /* empty stylesheet means NO stylesheet */
1866             if (stylesheet && *stylesheet == '\0')
1867                 stylesheet = 0;
1868
1869             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1870                                        &hres->content_buf, &hres->content_len,
1871                                        soap_handlers, charset, stylesheet);
1872             hres->code = http_code;
1873
1874             strcpy(ctype, "text/xml");
1875             if (charset && strlen(charset) < sizeof(ctype)-30)
1876             {
1877                 strcat(ctype, "; charset=");
1878                 strcat(ctype, charset);
1879             }
1880             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1881         }
1882         else
1883             p = z_get_HTTP_Response(o, http_code);
1884     }
1885
1886     if (p == 0)
1887         p = z_get_HTTP_Response(o, 500);
1888     hres = p->u.HTTP_Response;
1889     if (!strcmp(hreq->version, "1.0")) 
1890     {
1891         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1892         if (v && !strcmp(v, "Keep-Alive"))
1893             keepalive = 1;
1894         else
1895             keepalive = 0;
1896         hres->version = "1.0";
1897     }
1898     else
1899     {
1900         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1901         if (v && !strcmp(v, "close"))
1902             keepalive = 0;
1903         else
1904             keepalive = 1;
1905         hres->version = "1.1";
1906     }
1907     if (!keepalive)
1908     {
1909         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1910         assoc->state = ASSOC_DEAD;
1911         assoc->cs_get_mask = 0;
1912     }
1913     else
1914     {
1915         int t;
1916         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1917
1918         if (alive && isdigit(*(const unsigned char *) alive))
1919             t = atoi(alive);
1920         else
1921             t = 15;
1922         if (t < 0 || t > 3600)
1923             t = 3600;
1924         iochan_settimeout(assoc->client_chan,t);
1925         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1926     }
1927     process_gdu_response(assoc, req, p);
1928 }
1929
1930 static void process_gdu_request(association *assoc, request *req)
1931 {
1932     if (req->gdu_request->which == Z_GDU_Z3950)
1933     {
1934         char *msg = 0;
1935         req->apdu_request = req->gdu_request->u.z3950;
1936         if (process_z_request(assoc, req, &msg) < 0)
1937             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1938     }
1939     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1940         process_http_request(assoc, req);
1941     else
1942     {
1943         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1944     }
1945 }
1946
1947 /*
1948  * Initiate request processing.
1949  */
1950 static int process_z_request(association *assoc, request *req, char **msg)
1951 {
1952     int fd = -1;
1953     Z_APDU *res;
1954     int retval;
1955     
1956     *msg = "Unknown Error";
1957     assert(req && req->state == REQUEST_IDLE);
1958     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1959     {
1960         *msg = "Missing InitRequest";
1961         return -1;
1962     }
1963     switch (req->apdu_request->which)
1964     {
1965     case Z_APDU_initRequest:
1966         res = process_initRequest(assoc, req); break;
1967     case Z_APDU_searchRequest:
1968         res = process_searchRequest(assoc, req, &fd); break;
1969     case Z_APDU_presentRequest:
1970         res = process_presentRequest(assoc, req, &fd); break;
1971     case Z_APDU_scanRequest:
1972         if (assoc->init->bend_scan)
1973             res = process_scanRequest(assoc, req, &fd);
1974         else
1975         {
1976             *msg = "Cannot handle Scan APDU";
1977             return -1;
1978         }
1979         break;
1980     case Z_APDU_extendedServicesRequest:
1981         if (assoc->init->bend_esrequest)
1982             res = process_ESRequest(assoc, req, &fd);
1983         else
1984         {
1985             *msg = "Cannot handle Extended Services APDU";
1986             return -1;
1987         }
1988         break;
1989     case Z_APDU_sortRequest:
1990         if (assoc->init->bend_sort)
1991             res = process_sortRequest(assoc, req, &fd);
1992         else
1993         {
1994             *msg = "Cannot handle Sort APDU";
1995             return -1;
1996         }
1997         break;
1998     case Z_APDU_close:
1999         process_close(assoc, req);
2000         return 0;
2001     case Z_APDU_deleteResultSetRequest:
2002         if (assoc->init->bend_delete)
2003             res = process_deleteRequest(assoc, req, &fd);
2004         else
2005         {
2006             *msg = "Cannot handle Delete APDU";
2007             return -1;
2008         }
2009         break;
2010     case Z_APDU_segmentRequest:
2011         if (assoc->init->bend_segment)
2012         {
2013             res = process_segmentRequest(assoc, req);
2014         }
2015         else
2016         {
2017             *msg = "Cannot handle Segment APDU";
2018             return -1;
2019         }
2020         break;
2021     case Z_APDU_triggerResourceControlRequest:
2022         return 0;
2023     default:
2024         *msg = "Bad APDU received";
2025         return -1;
2026     }
2027     if (res)
2028     {
2029         yaz_log(YLOG_DEBUG, "  result immediately available");
2030         retval = process_z_response(assoc, req, res);
2031     }
2032     else if (fd < 0)
2033     {
2034         yaz_log(YLOG_DEBUG, "  result unavailble");
2035         retval = 0;
2036     }
2037     else /* no result yet - one will be provided later */
2038     {
2039         IOCHAN chan;
2040
2041         /* Set up an I/O handler for the fd supplied by the backend */
2042
2043         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2044         req->state = REQUEST_PENDING;
2045         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2046             abort();
2047         iochan_setdata(chan, assoc);
2048         retval = 0;
2049     }
2050     return retval;
2051 }
2052
2053 /*
2054  * Handle message from the backend.
2055  */
2056 void backend_response(IOCHAN i, int event)
2057 {
2058     association *assoc = (association *)iochan_getdata(i);
2059     request *req = request_head(&assoc->incoming);
2060     Z_APDU *res;
2061     int fd;
2062
2063     yaz_log(YLOG_DEBUG, "backend_response");
2064     assert(assoc && req && req->state != REQUEST_IDLE);
2065     /* determine what it is we're waiting for */
2066     switch (req->apdu_request->which)
2067     {
2068         case Z_APDU_searchRequest:
2069             res = response_searchRequest(assoc, req, 0, &fd); break;
2070 #if 0
2071         case Z_APDU_presentRequest:
2072             res = response_presentRequest(assoc, req, 0, &fd); break;
2073         case Z_APDU_scanRequest:
2074             res = response_scanRequest(assoc, req, 0, &fd); break;
2075 #endif
2076         default:
2077             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2078             abort();
2079     }
2080     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2081     {
2082         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2083         do_close(assoc, Z_Close_systemProblem, 0);
2084         iochan_destroy(i);
2085         return;
2086     }
2087     else if (!res) /* no result yet - try again later */
2088     {
2089         yaz_log(YLOG_DEBUG, "   no result yet");
2090         iochan_setfd(i, fd); /* in case fd has changed */
2091     }
2092 }
2093
2094 /*
2095  * Encode response, and transfer the request structure to the outgoing queue.
2096  */
2097 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2098 {
2099     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2100
2101     if (assoc->print)
2102     {
2103         if (!z_GDU(assoc->print, &res, 0, 0))
2104             yaz_log(YLOG_WARN, "ODR print error: %s", 
2105                 odr_errmsg(odr_geterror(assoc->print)));
2106         odr_reset(assoc->print);
2107     }
2108     if (!z_GDU(assoc->encode, &res, 0, 0))
2109     {
2110         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2111                 odr_errmsg(odr_geterror(assoc->decode)),
2112                 odr_getelement(assoc->decode));
2113         return -1;
2114     }
2115     req->response = odr_getbuf(assoc->encode, &req->len_response,
2116         &req->size_response);
2117     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2118     odr_reset(assoc->encode);
2119     req->state = REQUEST_IDLE;
2120     request_enq(&assoc->outgoing, req);
2121     /* turn the work over to the ir_session handler */
2122     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2123     assoc->cs_put_mask = EVENT_OUTPUT;
2124     /* Is there more work to be done? give that to the input handler too */
2125     for (;;)
2126     {
2127         req = request_head(&assoc->incoming);
2128         if (req && req->state == REQUEST_IDLE)
2129         {
2130             request_deq(&assoc->incoming);
2131             process_gdu_request(assoc, req);
2132         }
2133         else
2134             break;
2135     }
2136     return 0;
2137 }
2138
2139 /*
2140  * Encode response, and transfer the request structure to the outgoing queue.
2141  */
2142 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2143 {
2144     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2145     gres->which = Z_GDU_Z3950;
2146     gres->u.z3950 = res;
2147
2148     return process_gdu_response(assoc, req, gres);
2149 }
2150
2151 static char *get_vhost(Z_OtherInformation *otherInfo)
2152 {
2153     return yaz_oi_get_string_oid(&otherInfo, yaz_oid_userinfo_proxy, 1, 0);
2154 }
2155
2156 /*
2157  * Handle init request.
2158  * At the moment, we don't check the options
2159  * anywhere else in the code - we just try not to do anything that would
2160  * break a naive client. We'll toss 'em into the association block when
2161  * we need them there.
2162  */
2163 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2164 {
2165     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2166     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2167     Z_InitResponse *resp = apdu->u.initResponse;
2168     bend_initresult *binitres;
2169     char *version;
2170     char options[140];
2171     statserv_options_block *cb = 0;  /* by default no control for backend */
2172
2173     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2174         cb = statserv_getcontrol();  /* got control block for backend */
2175
2176     if (cb && assoc->backend)
2177         (*cb->bend_close)(assoc->backend);
2178
2179     yaz_log(log_requestdetail, "Got initRequest");
2180     if (req->implementationId)
2181         yaz_log(log_requestdetail, "Id:        %s",
2182                 req->implementationId);
2183     if (req->implementationName)
2184         yaz_log(log_requestdetail, "Name:      %s",
2185                 req->implementationName);
2186     if (req->implementationVersion)
2187         yaz_log(log_requestdetail, "Version:   %s",
2188                 req->implementationVersion);
2189     
2190     assoc_init_reset(assoc);
2191
2192     assoc->init->auth = req->idAuthentication;
2193     assoc->init->referenceId = req->referenceId;
2194
2195     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2196     {
2197         Z_CharSetandLanguageNegotiation *negotiation =
2198             yaz_get_charneg_record (req->otherInfo);
2199         if (negotiation &&
2200             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2201             assoc->init->charneg_request = negotiation;
2202     }
2203
2204     assoc->backend = 0;
2205     if (cb)
2206     {
2207         if (req->implementationVersion)
2208             yaz_log(log_requestdetail, "Config:    %s",
2209                     cb->configname);
2210     
2211         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2212         
2213         /* we have a backend control block, so call that init function */
2214         if (!(binitres = (*cb->bend_init)(assoc->init)))
2215         {
2216             yaz_log(YLOG_WARN, "Bad response from backend.");
2217             return 0;
2218         }
2219         assoc->backend = binitres->handle;
2220     }
2221     else
2222     {
2223         /* no backend. return error */
2224         binitres = (bend_initresult *)
2225             odr_malloc(assoc->encode, sizeof(*binitres));
2226         binitres->errstring = 0;
2227         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2228         iochan_settimeout(assoc->client_chan, 10);
2229     }
2230     if ((assoc->init->bend_sort))
2231         yaz_log(YLOG_DEBUG, "Sort handler installed");
2232     if ((assoc->init->bend_search))
2233         yaz_log(YLOG_DEBUG, "Search handler installed");
2234     if ((assoc->init->bend_present))
2235         yaz_log(YLOG_DEBUG, "Present handler installed");   
2236     if ((assoc->init->bend_esrequest))
2237         yaz_log(YLOG_DEBUG, "ESRequest handler installed");   
2238     if ((assoc->init->bend_delete))
2239         yaz_log(YLOG_DEBUG, "Delete handler installed");   
2240     if ((assoc->init->bend_scan))
2241         yaz_log(YLOG_DEBUG, "Scan handler installed");   
2242     if ((assoc->init->bend_segment))
2243         yaz_log(YLOG_DEBUG, "Segment handler installed");   
2244     
2245     resp->referenceId = req->referenceId;
2246     *options = '\0';
2247     /* let's tell the client what we can do */
2248     if (ODR_MASK_GET(req->options, Z_Options_search))
2249     {
2250         ODR_MASK_SET(resp->options, Z_Options_search);
2251         strcat(options, "srch");
2252     }
2253     if (ODR_MASK_GET(req->options, Z_Options_present))
2254     {
2255         ODR_MASK_SET(resp->options, Z_Options_present);
2256         strcat(options, " prst");
2257     }
2258     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2259         assoc->init->bend_delete)
2260     {
2261         ODR_MASK_SET(resp->options, Z_Options_delSet);
2262         strcat(options, " del");
2263     }
2264     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2265         assoc->init->bend_esrequest)
2266     {
2267         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2268         strcat(options, " extendedServices");
2269     }
2270     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2271     {
2272         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2273         strcat(options, " namedresults");
2274     }
2275     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2276     {
2277         ODR_MASK_SET(resp->options, Z_Options_scan);
2278         strcat(options, " scan");
2279     }
2280     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2281     {
2282         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2283         strcat(options, " concurrop");
2284     }
2285     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2286     {
2287         ODR_MASK_SET(resp->options, Z_Options_sort);
2288         strcat(options, " sort");
2289     }
2290     
2291     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2292     {
2293         Z_OtherInformationUnit *p0;
2294
2295         if (!assoc->init->charneg_response)
2296         {
2297             if (assoc->init->query_charset)
2298             {
2299                 assoc->init->charneg_response = yaz_set_response_charneg(
2300                     assoc->encode, assoc->init->query_charset, 0, 
2301                     assoc->init->records_in_same_charset);
2302             }
2303             else
2304             {
2305                 yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2306             }
2307         }
2308         if (assoc->init->charneg_response
2309             && (p0=yaz_oi_update(&resp->otherInfo, assoc->encode, NULL, 0, 0)))
2310         {
2311             p0->which = Z_OtherInfo_externallyDefinedInfo;
2312             p0->information.externallyDefinedInfo =
2313                 assoc->init->charneg_response;
2314             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2315             strcat(options, " negotiation");
2316         }
2317     }
2318     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2319         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2320
2321     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2322     {
2323         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2324         assoc->version = 1; /* 1 & 2 are equivalent */
2325     }
2326     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2327     {
2328         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2329         assoc->version = 2;
2330     }
2331     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2332     {
2333         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2334         assoc->version = 3;
2335     }
2336
2337     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2338
2339     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2340         assoc->maximumRecordSize = *req->maximumRecordSize;
2341
2342     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2343         assoc->preferredMessageSize = *req->preferredMessageSize;
2344
2345     resp->preferredMessageSize = &assoc->preferredMessageSize;
2346     resp->maximumRecordSize = &assoc->maximumRecordSize;
2347
2348     resp->implementationId = odr_prepend(assoc->encode,
2349                 assoc->init->implementation_id,
2350                 resp->implementationId);
2351
2352     resp->implementationName = odr_prepend(assoc->encode,
2353                 assoc->init->implementation_name,
2354                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2355
2356     version = odr_strdup(assoc->encode, "$Revision: 1.128 $");
2357     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2358         version[strlen(version)-2] = '\0';
2359     resp->implementationVersion = odr_prepend(assoc->encode,
2360                 assoc->init->implementation_version,
2361                 odr_prepend(assoc->encode, &version[11],
2362                             resp->implementationVersion));
2363
2364     if (binitres->errcode)
2365     {
2366         assoc->state = ASSOC_DEAD;
2367         resp->userInformationField =
2368             init_diagnostics(assoc->encode, binitres->errcode,
2369                              binitres->errstring);
2370         *resp->result = 0;
2371     }
2372     if (log_request)
2373     {
2374         if (!req->idAuthentication)
2375             yaz_log(log_request, "Auth none");
2376         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2377         {
2378             const char *open = req->idAuthentication->u.open;
2379             const char *slash = strchr(open, '/');
2380             int len;
2381             if (slash)
2382                 len = slash - open;
2383             else
2384                 len = strlen(open);
2385                 yaz_log(log_request, "Auth open %.*s", len, open);
2386         }
2387         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2388         {
2389             const char *user = req->idAuthentication->u.idPass->userId;
2390             const char *group = req->idAuthentication->u.idPass->groupId;
2391             yaz_log(log_request, "Auth idPass %s %s",
2392                     user ? user : "-", group ? group : "-");
2393         }
2394         else if (req->idAuthentication->which 
2395                  == Z_IdAuthentication_anonymous)
2396         {
2397             yaz_log(log_request, "Auth anonymous");
2398         }
2399         else
2400         {
2401             yaz_log(log_request, "Auth other");
2402         }
2403     }
2404     if (log_request)
2405     {
2406         WRBUF wr = wrbuf_alloc();
2407         wrbuf_printf(wr, "Init ");
2408         if (binitres->errcode)
2409             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2410         else
2411             wrbuf_printf(wr, "OK -");
2412         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2413                      (req->implementationId ? req->implementationId :"-"), 
2414                      (req->implementationName ?
2415                       req->implementationName : "-"),
2416                      (req->implementationVersion ?
2417                       req->implementationVersion : "-")
2418             );
2419         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2420         wrbuf_destroy(wr);
2421     }
2422     return apdu;
2423 }
2424
2425 /*
2426  * Set the specified `errcode' and `errstring' into a UserInfo-1
2427  * external to be returned to the client in accordance with Z35.90
2428  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2429  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2430  */
2431 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2432 {
2433     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2434         addinfo ? " -- " : "", addinfo ? addinfo : "");
2435     return zget_init_diagnostics(odr, error, addinfo);
2436 }
2437
2438 /*
2439  * nonsurrogate diagnostic record.
2440  */
2441 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2442 {
2443     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2444
2445     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2446             addinfo ? " -- " : "", addinfo ? addinfo : "");
2447
2448     rec->which = Z_Records_NSD;
2449     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2450                                                            error, addinfo);
2451     return rec;
2452 }
2453
2454 /*
2455  * surrogate diagnostic.
2456  */
2457 static Z_NamePlusRecord *surrogatediagrec(association *assoc, 
2458                                           const char *dbname,
2459                                           int error, const char *addinfo)
2460 {
2461     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2462             addinfo ? " -- " : "", addinfo ? addinfo : "");
2463     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2464 }
2465
2466 static Z_Records *pack_records(association *a, char *setname, int start,
2467                                int *num, Z_RecordComposition *comp,
2468                                int *next, int *pres,
2469                                Z_ReferenceId *referenceId,
2470                                Odr_oid *oid, int *errcode)
2471 {
2472     int recno, total_length = 0, toget = *num, dumped_records = 0;
2473     Z_Records *records =
2474         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2475     Z_NamePlusRecordList *reclist =
2476         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2477     Z_NamePlusRecord **list =
2478         (Z_NamePlusRecord **) odr_malloc(a->encode, sizeof(*list) * toget);
2479
2480     records->which = Z_Records_DBOSD;
2481     records->u.databaseOrSurDiagnostics = reclist;
2482     reclist->num_records = 0;
2483     reclist->records = list;
2484     *pres = Z_PresentStatus_success;
2485     *num = 0;
2486     *next = 0;
2487
2488     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2489     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2490         a->maximumRecordSize);
2491     for (recno = start; reclist->num_records < toget; recno++)
2492     {
2493         bend_fetch_rr freq;
2494         Z_NamePlusRecord *thisrec;
2495         int this_length = 0;
2496         /*
2497          * we get the number of bytes allocated on the stream before any
2498          * allocation done by the backend - this should give us a reasonable
2499          * idea of the total size of the data so far.
2500          */
2501         total_length = odr_total(a->encode) - dumped_records;
2502         freq.errcode = 0;
2503         freq.errstring = 0;
2504         freq.basename = 0;
2505         freq.len = 0;
2506         freq.record = 0;
2507         freq.last_in_set = 0;
2508         freq.setname = setname;
2509         freq.surrogate_flag = 0;
2510         freq.number = recno;
2511         freq.comp = comp;
2512         freq.request_format = oid;
2513         freq.output_format = 0;
2514         freq.stream = a->encode;
2515         freq.print = a->print;
2516         freq.referenceId = referenceId;
2517         freq.schema = 0;
2518
2519         retrieve_fetch(a, &freq);
2520
2521         *next = freq.last_in_set ? 0 : recno + 1;
2522
2523         if (freq.errcode)
2524         {
2525             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2526             {
2527                 char s[20];
2528                 *pres = Z_PresentStatus_failure;
2529                 /* for 'present request out of range',
2530                    set addinfo to record position if not set */
2531                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  && 
2532                                 freq.errstring == 0)
2533                 {
2534                     sprintf (s, "%d", recno);
2535                     freq.errstring = s;
2536                 }
2537                 if (errcode)
2538                     *errcode = freq.errcode;
2539                 return diagrec(a, freq.errcode, freq.errstring);
2540             }
2541             reclist->records[reclist->num_records] =
2542                 surrogatediagrec(a, freq.basename, freq.errcode,
2543                                  freq.errstring);
2544             reclist->num_records++;
2545             continue;
2546         }
2547         if (freq.record == 0)  /* no error and no record ? */
2548         {
2549             *next = 0;   /* signal end-of-set and stop */
2550             break;
2551         }
2552         if (freq.len >= 0)
2553             this_length = freq.len;
2554         else
2555             this_length = odr_total(a->encode) - total_length - dumped_records;
2556         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2557             this_length, total_length, dumped_records);
2558         if (a->preferredMessageSize > 0 &&
2559                 this_length + total_length > a->preferredMessageSize)
2560         {
2561             /* record is small enough, really */
2562             if (this_length <= a->preferredMessageSize && recno > start)
2563             {
2564                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2565                 *pres = Z_PresentStatus_partial_2;
2566                 break;
2567             }
2568             /* record can only be fetched by itself */
2569             if (this_length < a->maximumRecordSize)
2570             {
2571                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2572                 if (toget > 1)
2573                 {
2574                     yaz_log(YLOG_DEBUG, "  Dropped it");
2575                     reclist->records[reclist->num_records] =
2576                          surrogatediagrec(a, freq.basename, 16, 0);
2577                     reclist->num_records++;
2578                     dumped_records += this_length;
2579                     continue;
2580                 }
2581             }
2582             else /* too big entirely */
2583             {
2584                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2585                         this_length, a->maximumRecordSize);
2586                 reclist->records[reclist->num_records] =
2587                     surrogatediagrec(a, freq.basename, 17, 0);
2588                 reclist->num_records++;
2589                 dumped_records += this_length;
2590                 continue;
2591             }
2592         }
2593
2594         if (!(thisrec = (Z_NamePlusRecord *)
2595               odr_malloc(a->encode, sizeof(*thisrec))))
2596             return 0;
2597         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2598         thisrec->which = Z_NamePlusRecord_databaseRecord;
2599
2600         if (!freq.output_format)
2601             freq.output_format = freq.request_format;
2602         thisrec->u.databaseRecord = z_ext_record_oid(
2603             a->encode, freq.output_format, freq.record, freq.len);
2604         if (!thisrec->u.databaseRecord)
2605             return 0;
2606         reclist->records[reclist->num_records] = thisrec;
2607         reclist->num_records++;
2608     }
2609     *num = reclist->num_records;
2610     return records;
2611 }
2612
2613 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2614     int *fd)
2615 {
2616     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2617     bend_search_rr *bsrr = 
2618         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2619     
2620     yaz_log(log_requestdetail, "Got SearchRequest.");
2621     bsrr->fd = fd;
2622     bsrr->request = reqb;
2623     bsrr->association = assoc;
2624     bsrr->referenceId = req->referenceId;
2625     save_referenceId (reqb, bsrr->referenceId);
2626     bsrr->srw_sortKeys = 0;
2627     bsrr->srw_setname = 0;
2628     bsrr->srw_setnameIdleTime = 0;
2629     bsrr->estimated_hit_count = 0;
2630     bsrr->partial_resultset = 0;
2631
2632     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2633     if (req->databaseNames)
2634     {
2635         int i;
2636         for (i = 0; i < req->num_databaseNames; i++)
2637             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2638     }
2639
2640     yaz_log_zquery_level(log_requestdetail,req->query);
2641
2642     if (assoc->init->bend_search)
2643     {
2644         bsrr->setname = req->resultSetName;
2645         bsrr->replace_set = *req->replaceIndicator;
2646         bsrr->num_bases = req->num_databaseNames;
2647         bsrr->basenames = req->databaseNames;
2648         bsrr->query = req->query;
2649         bsrr->stream = assoc->encode;
2650         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2651         bsrr->decode = assoc->decode;
2652         bsrr->print = assoc->print;
2653         bsrr->hits = 0;
2654         bsrr->errcode = 0;
2655         bsrr->errstring = NULL;
2656         bsrr->search_info = NULL;
2657
2658         if (assoc->server && assoc->server->cql_transform 
2659             && req->query->which == Z_Query_type_104
2660             && req->query->u.type_104->which == Z_External_CQL)
2661         {
2662             /* have a CQL query and a CQL to PQF transform .. */
2663             int srw_errcode = 
2664                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2665                         assoc->server->cql_transform, bsrr->query);
2666             if (srw_errcode)
2667                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2668         }
2669
2670         if (assoc->server && assoc->server->ccl_transform 
2671             && req->query->which == Z_Query_type_2) /*CCL*/
2672         {
2673             /* have a CCL query and a CCL to PQF transform .. */
2674             int srw_errcode = 
2675                 ccl2pqf(bsrr->stream, req->query->u.type_2,
2676                         assoc->server->ccl_transform, bsrr);
2677             if (srw_errcode)
2678                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2679         }
2680
2681         if (!bsrr->errcode)
2682             (assoc->init->bend_search)(assoc->backend, bsrr);
2683         if (!bsrr->request)  /* backend not ready with the search response */
2684             return 0;  /* should not be used any more */
2685     }
2686     else
2687     { 
2688         /* FIXME - make a diagnostic for it */
2689         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2690     }
2691     return response_searchRequest(assoc, reqb, bsrr, fd);
2692 }
2693
2694 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2695
2696 /*
2697  * Prepare a searchresponse based on the backend results. We probably want
2698  * to look at making the fetching of records nonblocking as well, but
2699  * so far, we'll keep things simple.
2700  * If bsrt is null, that means we're called in response to a communications
2701  * event, and we'll have to get the response for ourselves.
2702  */
2703 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2704     bend_search_rr *bsrt, int *fd)
2705 {
2706     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2707     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2708     Z_SearchResponse *resp = (Z_SearchResponse *)
2709         odr_malloc(assoc->encode, sizeof(*resp));
2710     int *nulint = odr_intdup(assoc->encode, 0);
2711     int *next = odr_intdup(assoc->encode, 0);
2712     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2713     int returnedrecs = 0;
2714
2715     apdu->which = Z_APDU_searchResponse;
2716     apdu->u.searchResponse = resp;
2717     resp->referenceId = req->referenceId;
2718     resp->additionalSearchInfo = 0;
2719     resp->otherInfo = 0;
2720     *fd = -1;
2721     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2722     {
2723         yaz_log(YLOG_FATAL, "Bad result from backend");
2724         return 0;
2725     }
2726     else if (bsrt->errcode)
2727     {
2728         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2729         resp->resultCount = nulint;
2730         resp->numberOfRecordsReturned = nulint;
2731         resp->nextResultSetPosition = nulint;
2732         resp->searchStatus = nulint;
2733         resp->resultSetStatus = none;
2734         resp->presentStatus = 0;
2735     }
2736     else
2737     {
2738         bool_t *sr = odr_intdup(assoc->encode, 1);
2739         int *toget = odr_intdup(assoc->encode, 0);
2740         Z_RecordComposition comp, *compp = 0;
2741
2742         yaz_log(log_requestdetail, "resultCount: %d", bsrt->hits);
2743
2744         resp->records = 0;
2745         resp->resultCount = &bsrt->hits;
2746
2747         comp.which = Z_RecordComp_simple;
2748         /* how many records does the user agent want, then? */
2749         if (bsrt->hits <= *req->smallSetUpperBound)
2750         {
2751             *toget = bsrt->hits;
2752             if ((comp.u.simple = req->smallSetElementSetNames))
2753                 compp = &comp;
2754         }
2755         else if (bsrt->hits < *req->largeSetLowerBound)
2756         {
2757             *toget = *req->mediumSetPresentNumber;
2758             if (*toget > bsrt->hits)
2759                 *toget = bsrt->hits;
2760             if ((comp.u.simple = req->mediumSetElementSetNames))
2761                 compp = &comp;
2762         }
2763         else
2764             *toget = 0;
2765
2766         if (*toget && !resp->records)
2767         {
2768             int *presst = odr_intdup(assoc->encode, 0);
2769             /* Call bend_present if defined */
2770             if (assoc->init->bend_present)
2771             {
2772                 bend_present_rr *bprr = (bend_present_rr *)
2773                     nmem_malloc(reqb->request_mem, sizeof(*bprr));
2774                 bprr->setname = req->resultSetName;
2775                 bprr->start = 1;
2776                 bprr->number = *toget;
2777                 bprr->format = req->preferredRecordSyntax;
2778                 bprr->comp = compp;
2779                 bprr->referenceId = req->referenceId;
2780                 bprr->stream = assoc->encode;
2781                 bprr->print = assoc->print;
2782                 bprr->request = reqb;
2783                 bprr->association = assoc;
2784                 bprr->errcode = 0;
2785                 bprr->errstring = NULL;
2786                 (*assoc->init->bend_present)(assoc->backend, bprr);
2787
2788                 if (!bprr->request)
2789                     return 0;
2790                 if (bprr->errcode)
2791                 {
2792                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2793                     *resp->presentStatus = Z_PresentStatus_failure;
2794                 }
2795             }
2796
2797             if (!resp->records)
2798                 resp->records = pack_records(
2799                     assoc, req->resultSetName, 1,
2800                     toget, compp, next, presst, req->referenceId,
2801                     req->preferredRecordSyntax, NULL);
2802             if (!resp->records)
2803                 return 0;
2804             resp->numberOfRecordsReturned = toget;
2805             returnedrecs = *toget;
2806             resp->presentStatus = presst;
2807         }
2808         else
2809         {
2810             if (*resp->resultCount)
2811                 *next = 1;
2812             resp->numberOfRecordsReturned = nulint;
2813             resp->presentStatus = 0;
2814         }
2815         resp->nextResultSetPosition = next;
2816         resp->searchStatus = sr;
2817         resp->resultSetStatus = 0;
2818         if (bsrt->estimated_hit_count)
2819         {
2820             resp->resultSetStatus = odr_intdup(assoc->encode, 
2821                                                Z_SearchResponse_estimate);
2822         }
2823         else if (bsrt->partial_resultset)
2824         {
2825             resp->resultSetStatus = odr_intdup(assoc->encode, 
2826                                                Z_SearchResponse_subset);
2827         }
2828     }
2829     resp->additionalSearchInfo = bsrt->search_info;
2830
2831     if (log_request)
2832     {
2833         int i;
2834         WRBUF wr = wrbuf_alloc();
2835
2836         for (i = 0 ; i < req->num_databaseNames; i++){
2837             if (i)
2838                 wrbuf_printf(wr, "+");
2839             wrbuf_printf(wr, req->databaseNames[i]);
2840         }
2841         wrbuf_printf(wr, " ");
2842         
2843         if (bsrt->errcode)
2844             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2845         else
2846             wrbuf_printf(wr, "OK %d", bsrt->hits);
2847         wrbuf_printf(wr, " %s 1+%d ",
2848                      req->resultSetName, returnedrecs);
2849         yaz_query_to_wrbuf(wr, req->query);
2850         
2851         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2852         wrbuf_destroy(wr);
2853     }
2854     return apdu;
2855 }
2856
2857 /*
2858  * Maybe we got a little over-friendly when we designed bend_fetch to
2859  * get only one record at a time. Some backends can optimise multiple-record
2860  * fetches, and at any rate, there is some overhead involved in
2861  * all that selecting and hopping around. Problem is, of course, that the
2862  * frontend can't know ahead of time how many records it'll need to
2863  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2864  * is downright lousy as a bulk data transfer protocol.
2865  *
2866  * To start with, we'll do the fetching of records from the backend
2867  * in one operation: To save some trips in and out of the event-handler,
2868  * and to simplify the interface to pack_records. At any rate, asynch
2869  * operation is more fun in operations that have an unpredictable execution
2870  * speed - which is normally more true for search than for present.
2871  */
2872 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2873                                       int *fd)
2874 {
2875     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2876     Z_APDU *apdu;
2877     Z_PresentResponse *resp;
2878     int *next;
2879     int *num;
2880     int errcode = 0;
2881     const char *errstring = 0;
2882
2883     yaz_log(log_requestdetail, "Got PresentRequest.");
2884
2885     resp = (Z_PresentResponse *)odr_malloc(assoc->encode, sizeof(*resp));
2886     resp->records = 0;
2887     resp->presentStatus = odr_intdup(assoc->encode, 0);
2888     if (assoc->init->bend_present)
2889     {
2890         bend_present_rr *bprr = (bend_present_rr *)
2891             nmem_malloc(reqb->request_mem, sizeof(*bprr));
2892         bprr->setname = req->resultSetId;
2893         bprr->start = *req->resultSetStartPoint;
2894         bprr->number = *req->numberOfRecordsRequested;
2895         bprr->format = req->preferredRecordSyntax;
2896         bprr->comp = req->recordComposition;
2897         bprr->referenceId = req->referenceId;
2898         bprr->stream = assoc->encode;
2899         bprr->print = assoc->print;
2900         bprr->request = reqb;
2901         bprr->association = assoc;
2902         bprr->errcode = 0;
2903         bprr->errstring = NULL;
2904         (*assoc->init->bend_present)(assoc->backend, bprr);
2905         
2906         if (!bprr->request)
2907             return 0; /* should not happen */
2908         if (bprr->errcode)
2909         {
2910             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2911             *resp->presentStatus = Z_PresentStatus_failure;
2912             errcode = bprr->errcode;
2913             errstring = bprr->errstring;
2914         }
2915     }
2916     apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2917     next = odr_intdup(assoc->encode, 0);
2918     num = odr_intdup(assoc->encode, 0);
2919     
2920     apdu->which = Z_APDU_presentResponse;
2921     apdu->u.presentResponse = resp;
2922     resp->referenceId = req->referenceId;
2923     resp->otherInfo = 0;
2924     
2925     if (!resp->records)
2926     {
2927         *num = *req->numberOfRecordsRequested;
2928         resp->records =
2929             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2930                          num, req->recordComposition, next,
2931                          resp->presentStatus,
2932                          req->referenceId, req->preferredRecordSyntax, 
2933                          &errcode);
2934     }
2935     if (log_request)
2936     {
2937         WRBUF wr = wrbuf_alloc();
2938         wrbuf_printf(wr, "Present ");
2939
2940         if (*resp->presentStatus == Z_PresentStatus_failure)
2941             wrbuf_printf(wr, "ERROR %d ", errcode);
2942         else if (*resp->presentStatus == Z_PresentStatus_success)
2943             wrbuf_printf(wr, "OK -  ");
2944         else
2945             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2946
2947         wrbuf_printf(wr, " %s %d+%d ",
2948                 req->resultSetId, *req->resultSetStartPoint,
2949                 *req->numberOfRecordsRequested);
2950         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
2951         wrbuf_destroy(wr);
2952     }
2953     if (!resp->records)
2954         return 0;
2955     resp->numberOfRecordsReturned = num;
2956     resp->nextResultSetPosition = next;
2957     
2958     return apdu;
2959 }
2960
2961 /*
2962  * Scan was implemented rather in a hurry, and with support for only the basic
2963  * elements of the service in the backend API. Suggestions are welcome.
2964  */
2965 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2966 {
2967     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2968     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2969     Z_ScanResponse *res = (Z_ScanResponse *)
2970         odr_malloc(assoc->encode, sizeof(*res));
2971     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2972     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2973     Z_ListEntries *ents = (Z_ListEntries *)
2974         odr_malloc(assoc->encode, sizeof(*ents));
2975     Z_DiagRecs *diagrecs_p = NULL;
2976     bend_scan_rr *bsrr = (bend_scan_rr *)
2977         odr_malloc(assoc->encode, sizeof(*bsrr));
2978     struct scan_entry *save_entries;
2979
2980     yaz_log(log_requestdetail, "Got ScanRequest");
2981
2982     apdu->which = Z_APDU_scanResponse;
2983     apdu->u.scanResponse = res;
2984     res->referenceId = req->referenceId;
2985
2986     /* if step is absent, set it to 0 */
2987     res->stepSize = odr_intdup(assoc->encode, 0);
2988     if (req->stepSize)
2989         *res->stepSize = *req->stepSize;
2990
2991     res->scanStatus = scanStatus;
2992     res->numberOfEntriesReturned = numberOfEntriesReturned;
2993     res->positionOfTerm = 0;
2994     res->entries = ents;
2995     ents->num_entries = 0;
2996     ents->entries = NULL;
2997     ents->num_nonsurrogateDiagnostics = 0;
2998     ents->nonsurrogateDiagnostics = NULL;
2999     res->attributeSet = 0;
3000     res->otherInfo = 0;
3001
3002     if (req->databaseNames)
3003     {
3004         int i;
3005         for (i = 0; i < req->num_databaseNames; i++)
3006             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
3007     }
3008     bsrr->scanClause = 0;
3009     bsrr->errcode = 0;
3010     bsrr->errstring = 0;
3011     bsrr->num_bases = req->num_databaseNames;
3012     bsrr->basenames = req->databaseNames;
3013     bsrr->num_entries = *req->numberOfTermsRequested;
3014     bsrr->term = req->termListAndStartPoint;
3015     bsrr->referenceId = req->referenceId;
3016     bsrr->stream = assoc->encode;
3017     bsrr->print = assoc->print;
3018     bsrr->step_size = res->stepSize;
3019     bsrr->setname = yaz_oi_get_string_oid(&req->otherInfo, 
3020                                           yaz_oid_userinfo_scan_set, 1, 0);
3021     bsrr->entries = 0;
3022     /* For YAZ 2.0 and earlier it was the backend handler that
3023        initialized entries (member display_term did not exist)
3024        YAZ 2.0 and later sets 'entries'  and initialize all members
3025        including 'display_term'. If YAZ 2.0 or later sees that
3026        entries was modified - we assume that it is an old handler and
3027        that 'display_term' is _not_ set.
3028     */
3029     if (bsrr->num_entries > 0) 
3030     {
3031         int i;
3032         bsrr->entries = (struct scan_entry *)
3033             odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3034                        bsrr->num_entries);
3035         for (i = 0; i<bsrr->num_entries; i++)
3036         {
3037             bsrr->entries[i].term = 0;
3038             bsrr->entries[i].occurrences = 0;
3039             bsrr->entries[i].errcode = 0;
3040             bsrr->entries[i].errstring = 0;
3041             bsrr->entries[i].display_term = 0;
3042         }
3043     }
3044     save_entries = bsrr->entries;  /* save it so we can compare later */
3045
3046     bsrr->attributeset = req->attributeSet;
3047     log_scan_term_level(log_requestdetail, req->termListAndStartPoint, 
3048                         bsrr->attributeset);
3049     bsrr->term_position = req->preferredPositionInResponse ?
3050         *req->preferredPositionInResponse : 1;
3051
3052     ((int (*)(void *, bend_scan_rr *))
3053      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3054
3055     if (bsrr->errcode)
3056         diagrecs_p = zget_DiagRecs(assoc->encode,
3057                                    bsrr->errcode, bsrr->errstring);
3058     else
3059     {
3060         int i;
3061         Z_Entry **tab = (Z_Entry **)
3062             odr_malloc(assoc->encode, sizeof(*tab) * bsrr->num_entries);
3063         
3064         if (bsrr->status == BEND_SCAN_PARTIAL)
3065             *scanStatus = Z_Scan_partial_5;
3066         else
3067             *scanStatus = Z_Scan_success;
3068         ents->entries = tab;
3069         ents->num_entries = bsrr->num_entries;
3070         res->numberOfEntriesReturned = &ents->num_entries;          
3071         res->positionOfTerm = &bsrr->term_position;
3072         for (i = 0; i < bsrr->num_entries; i++)
3073         {
3074             Z_Entry *e;
3075             Z_TermInfo *t;
3076             Odr_oct *o;
3077             
3078             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3079             if (bsrr->entries[i].occurrences >= 0)
3080             {
3081                 e->which = Z_Entry_termInfo;
3082                 e->u.termInfo = t = (Z_TermInfo *)
3083                     odr_malloc(assoc->encode, sizeof(*t));
3084                 t->suggestedAttributes = 0;
3085                 t->displayTerm = 0;
3086                 if (save_entries == bsrr->entries && 
3087                     bsrr->entries[i].display_term)
3088                 {
3089                     /* the entries was _not_ set by the handler. So it's
3090                        safe to test for new member display_term. It is
3091                        NULL'ed by us.
3092                     */
3093                     t->displayTerm = odr_strdup(assoc->encode,
3094                                                 bsrr->entries[i].display_term);
3095                 }
3096                 t->alternativeTerm = 0;
3097                 t->byAttributes = 0;
3098                 t->otherTermInfo = 0;
3099                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3100                 t->term = (Z_Term *)
3101                     odr_malloc(assoc->encode, sizeof(*t->term));
3102                 t->term->which = Z_Term_general;
3103                 t->term->u.general = o =
3104                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3105                 o->buf = (unsigned char *)
3106                     odr_malloc(assoc->encode, o->len = o->size =
3107                                strlen(bsrr->entries[i].term));
3108                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3109                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3110                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3111             }
3112             else
3113             {
3114                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3115                                                   bsrr->entries[i].errcode,
3116                                                   bsrr->entries[i].errstring);
3117                 assert(drecs->num_diagRecs == 1);
3118                 e->which = Z_Entry_surrogateDiagnostic;
3119                 assert(drecs->diagRecs[0]);
3120                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3121             }
3122         }
3123     }
3124     if (diagrecs_p)
3125     {
3126         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3127         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3128     }
3129     if (log_request)
3130     {
3131         int i;
3132         WRBUF wr = wrbuf_alloc();
3133         wrbuf_printf(wr, "Scan ");
3134         for (i = 0 ; i < req->num_databaseNames; i++)
3135         {
3136             if (i)
3137                 wrbuf_printf(wr, "+");
3138             wrbuf_printf(wr, req->databaseNames[i]);
3139         }
3140
3141         wrbuf_printf(wr, " ");
3142         
3143         if (bsrr->errcode)
3144             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3145         else
3146             wrbuf_printf(wr, "OK"); 
3147
3148         wrbuf_printf(wr, " %d - %d+%d+%d",
3149                      res->numberOfEntriesReturned ?
3150                      *res->numberOfEntriesReturned : 0,
3151                      (req->preferredPositionInResponse ?
3152                       *req->preferredPositionInResponse : 1),
3153                      *req->numberOfTermsRequested,
3154                      (res->stepSize ? *res->stepSize : 1));
3155         
3156         if (bsrr->setname)
3157             wrbuf_printf(wr, "+%s", bsrr->setname);
3158
3159         wrbuf_printf(wr, " ");
3160         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint, 
3161                           bsrr->attributeset);
3162         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3163         wrbuf_destroy(wr);
3164     }
3165     return apdu;
3166 }
3167
3168 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3169     int *fd)
3170 {
3171     int i;
3172     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3173     Z_SortResponse *res = (Z_SortResponse *)
3174         odr_malloc(assoc->encode, sizeof(*res));
3175     bend_sort_rr *bsrr = (bend_sort_rr *)
3176         odr_malloc(assoc->encode, sizeof(*bsrr));
3177
3178     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3179
3180     yaz_log(log_requestdetail, "Got SortRequest.");
3181
3182     bsrr->num_input_setnames = req->num_inputResultSetNames;
3183     for (i=0;i<req->num_inputResultSetNames;i++)
3184         yaz_log(log_requestdetail, "Input resultset: '%s'",
3185                 req->inputResultSetNames[i]);
3186     bsrr->input_setnames = req->inputResultSetNames;
3187     bsrr->referenceId = req->referenceId;
3188     bsrr->output_setname = req->sortedResultSetName;
3189     yaz_log(log_requestdetail, "Output resultset: '%s'",
3190                 req->sortedResultSetName);
3191     bsrr->sort_sequence = req->sortSequence;
3192        /*FIXME - dump those sequences too */
3193     bsrr->stream = assoc->encode;
3194     bsrr->print = assoc->print;
3195
3196     bsrr->sort_status = Z_SortResponse_failure;
3197     bsrr->errcode = 0;
3198     bsrr->errstring = 0;
3199     
3200     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3201     
3202     res->referenceId = bsrr->referenceId;
3203     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3204     res->resultSetStatus = 0;
3205     if (bsrr->errcode)
3206     {
3207         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3208                                        bsrr->errcode, bsrr->errstring);
3209         res->diagnostics = dr->diagRecs;
3210         res->num_diagnostics = dr->num_diagRecs;
3211     }
3212     else
3213     {
3214         res->num_diagnostics = 0;
3215         res->diagnostics = 0;
3216     }
3217     res->resultCount = 0;
3218     res->otherInfo = 0;
3219
3220     apdu->which = Z_APDU_sortResponse;
3221     apdu->u.sortResponse = res;
3222     if (log_request)
3223     {
3224         WRBUF wr = wrbuf_alloc();
3225         wrbuf_printf(wr, "Sort ");
3226         if (bsrr->errcode)
3227             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3228         else
3229             wrbuf_printf(wr,  "OK -");
3230         wrbuf_printf(wr, " (");
3231         for (i = 0; i<req->num_inputResultSetNames; i++)
3232         {
3233             if (i)
3234                 wrbuf_printf(wr, "+");
3235             wrbuf_printf(wr, req->inputResultSetNames[i]);
3236         }
3237         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3238
3239         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3240         wrbuf_destroy(wr);
3241     }
3242     return apdu;
3243 }
3244
3245 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3246     int *fd)
3247 {
3248     int i;
3249     Z_DeleteResultSetRequest *req =
3250         reqb->apdu_request->u.deleteResultSetRequest;
3251     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3252         odr_malloc(assoc->encode, sizeof(*res));
3253     bend_delete_rr *bdrr = (bend_delete_rr *)
3254         odr_malloc(assoc->encode, sizeof(*bdrr));
3255     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3256
3257     yaz_log(log_requestdetail, "Got DeleteRequest.");
3258
3259     bdrr->num_setnames = req->num_resultSetList;
3260     bdrr->setnames = req->resultSetList;
3261     for (i = 0; i<req->num_resultSetList; i++)
3262         yaz_log(log_requestdetail, "resultset: '%s'",
3263                 req->resultSetList[i]);
3264     bdrr->stream = assoc->encode;
3265     bdrr->print = assoc->print;
3266     bdrr->function = *req->deleteFunction;
3267     bdrr->referenceId = req->referenceId;
3268     bdrr->statuses = 0;
3269     if (bdrr->num_setnames > 0)
3270     {
3271         bdrr->statuses = (int*) 
3272             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3273                        bdrr->num_setnames);
3274         for (i = 0; i < bdrr->num_setnames; i++)
3275             bdrr->statuses[i] = 0;
3276     }
3277     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3278     
3279     res->referenceId = req->referenceId;
3280
3281     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3282
3283     res->deleteListStatuses = 0;
3284     if (bdrr->num_setnames > 0)
3285     {
3286         int i;
3287         res->deleteListStatuses = (Z_ListStatuses *)
3288             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3289         res->deleteListStatuses->num = bdrr->num_setnames;
3290         res->deleteListStatuses->elements =
3291             (Z_ListStatus **)
3292             odr_malloc(assoc->encode, 
3293                         sizeof(*res->deleteListStatuses->elements) *
3294                         bdrr->num_setnames);
3295         for (i = 0; i<bdrr->num_setnames; i++)
3296         {
3297             res->deleteListStatuses->elements[i] =
3298                 (Z_ListStatus *)
3299                 odr_malloc(assoc->encode,
3300                             sizeof(**res->deleteListStatuses->elements));
3301             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3302             res->deleteListStatuses->elements[i]->id =
3303                 odr_strdup(assoc->encode, bdrr->setnames[i]);
3304         }
3305     }
3306     res->numberNotDeleted = 0;
3307     res->bulkStatuses = 0;
3308     res->deleteMessage = 0;
3309     res->otherInfo = 0;
3310
3311     apdu->which = Z_APDU_deleteResultSetResponse;
3312     apdu->u.deleteResultSetResponse = res;
3313     if (log_request)
3314     {
3315         WRBUF wr = wrbuf_alloc();
3316         wrbuf_printf(wr, "Delete ");
3317         if (bdrr->delete_status)
3318             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3319         else
3320             wrbuf_printf(wr, "OK -");
3321         for (i = 0; i<req->num_resultSetList; i++)
3322             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3323         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3324         wrbuf_destroy(wr);
3325     }
3326     return apdu;
3327 }
3328
3329 static void process_close(association *assoc, request *reqb)
3330 {
3331     Z_Close *req = reqb->apdu_request->u.close;
3332     static char *reasons[] =
3333     {
3334         "finished",
3335         "shutdown",
3336         "systemProblem",
3337         "costLimit",
3338         "resources",
3339         "securityViolation",
3340         "protocolError",
3341         "lackOfActivity",
3342         "peerAbort",
3343         "unspecified"
3344     };
3345
3346     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3347         reasons[*req->closeReason], req->diagnosticInformation ?
3348         req->diagnosticInformation : "NULL");
3349     if (assoc->version < 3) /* to make do_force respond with close */
3350         assoc->version = 3;
3351     do_close_req(assoc, Z_Close_finished,
3352                  "Association terminated by client", reqb);
3353     yaz_log(log_request,"Close OK");
3354 }
3355
3356 void save_referenceId(request *reqb, Z_ReferenceId *refid)
3357 {
3358     if (refid)
3359     {
3360         reqb->len_refid = refid->len;
3361         reqb->refid = (char *)nmem_malloc(reqb->request_mem, refid->len);
3362         memcpy(reqb->refid, refid->buf, refid->len);
3363     }
3364     else
3365     {
3366         reqb->len_refid = 0;
3367         reqb->refid = NULL;
3368     }
3369 }
3370
3371 void bend_request_send(bend_association a, bend_request req, Z_APDU *res)
3372 {
3373     process_z_response(a, req, res);
3374 }
3375
3376 bend_request bend_request_mk(bend_association a)
3377 {
3378     request *nreq = request_get(&a->outgoing);
3379     nreq->request_mem = nmem_create();
3380     return nreq;
3381 }
3382
3383 Z_ReferenceId *bend_request_getid(ODR odr, bend_request req)
3384 {
3385     Z_ReferenceId *id;
3386     if (!req->refid)
3387         return 0;
3388     id = (Odr_oct *)odr_malloc(odr, sizeof(*odr));
3389     id->buf = (unsigned char *)odr_malloc(odr, req->len_refid);
3390     id->len = id->size = req->len_refid;
3391     memcpy(id->buf, req->refid, req->len_refid);
3392     return id;
3393 }
3394
3395 void bend_request_destroy(bend_request *req)
3396 {
3397     nmem_destroy((*req)->request_mem);
3398     request_release(*req);
3399     *req = NULL;
3400 }
3401
3402 int bend_backend_respond(bend_association a, bend_request req)
3403 {
3404     char *msg;
3405     int r;
3406     r = process_z_request(a, req, &msg);
3407     if (r < 0)
3408         yaz_log(YLOG_WARN, "%s", msg);
3409     return r;
3410 }
3411
3412 void bend_request_setdata(bend_request r, void *p)
3413 {
3414     r->clientData = p;
3415 }