src/yaz-proxy.cpp

   1 /*
   2  * Copyright (c) 1998-2004, Index Data.
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: yaz-proxy.cpp,v 1.86 2004-01-09 18:11:15 adam Exp $
   6  */
   7
   8 #include <assert.h>
   9 #include <time.h>
  10
  11 #include <yaz/srw.h>
  12 #include <yaz/marcdisp.h>
  13 #include <yaz/yaz-iconv.h>
  14 #include <yaz/log.h>
  15 #include <yaz/diagbib1.h>
  16 #include <yaz++/proxy.h>
  17 #include <yaz/pquery.h>
  18
  19 #if HAVE_XSLT
  20 #include <libxslt/xsltutils.h>
  21 #include <libxslt/transform.h>
  22 #endif
  23
  24 static const char *apdu_name(Z_APDU *apdu)
  25 {
  26     switch (apdu->which)
  27     {
  28     case Z_APDU_initRequest:
  29         return "initRequest";
  30     case Z_APDU_initResponse:
  31         return "initResponse";
  32     case Z_APDU_searchRequest:
  33         return "searchRequest";
  34     case Z_APDU_searchResponse:
  35         return "searchResponse";
  36     case Z_APDU_presentRequest:
  37         return "presentRequest";
  38     case Z_APDU_presentResponse:
  39         return "presentResponse";
  40     case Z_APDU_deleteResultSetRequest:
  41         return "deleteResultSetRequest";
  42     case Z_APDU_deleteResultSetResponse:
  43         return "deleteResultSetResponse";
  44     case Z_APDU_scanRequest:
  45         return "scanRequest";
  46     case Z_APDU_scanResponse:
  47         return "scanResponse";
  48     case Z_APDU_sortRequest:
  49         return "sortRequest";
  50     case Z_APDU_sortResponse:
  51         return "sortResponse";
  52     case Z_APDU_extendedServicesRequest:
  53         return "extendedServicesRequest";
  54     case Z_APDU_extendedServicesResponse:
  55         return "extendedServicesResponse";
  56     case Z_APDU_close:
  57         return "close";
  58     }
  59     return "other";
  60 }
  61
  62 static const char *gdu_name(Z_GDU *gdu)
  63 {
  64     switch(gdu->which)
  65     {
  66     case Z_GDU_Z3950:
  67         return apdu_name(gdu->u.z3950);
  68     case Z_GDU_HTTP_Request:
  69         return "HTTP Request";
  70     case Z_GDU_HTTP_Response:
  71         return "HTTP Response";
  72     }
  73     return "Unknown request/response";
  74 }
  75
  76 Yaz_Proxy::Yaz_Proxy(IYaz_PDU_Observable *the_PDU_Observable,
  77                      Yaz_Proxy *parent) :
  78     Yaz_Z_Assoc(the_PDU_Observable), m_bw_stat(60), m_pdu_stat(60)
  79 {
  80     m_PDU_Observable = the_PDU_Observable;
  81     m_client = 0;
  82     m_parent = parent;
  83     m_clientPool = 0;
  84     m_seqno = 1;
  85     m_keepalive_limit_bw = 500000;
  86     m_keepalive_limit_pdu = 1000;
  87     m_proxyTarget = 0;
  88     m_default_target = 0;
  89     m_proxy_authentication = 0;
  90     m_max_clients = 150;
  91     m_log_mask = 0;
  92     m_seed = time(0);
  93     m_client_idletime = 600;
  94     m_target_idletime = 600;
  95     m_optimize = xstrdup ("1");
  96     strcpy(m_session_str, "0 ");
  97     m_session_no=0;
  98     m_bytes_sent = m_bytes_recv = 0;
  99     m_bw_hold_PDU = 0;
 100     m_bw_max = 0;
 101     m_pdu_max = 0;
 102     m_max_record_retrieve = 0;
 103     m_reconfig_flag = 0;
 104     m_config_fname = 0;
 105     m_request_no = 0;
 106     m_invalid_session = 0;
 107     m_config = 0;
 108     m_marcxml_flag = 0;
 109     m_stylesheet_schema = 0;
 110     m_s2z_stylesheet = 0;
 111     m_schema = 0;
 112     m_initRequest_apdu = 0;
 113     m_initRequest_mem = 0;
 114     m_apdu_invalid_session = 0;
 115     m_mem_invalid_session = 0;
 116     m_s2z_odr_init = 0;
 117     m_s2z_odr_search = 0;
 118     m_s2z_init_apdu = 0;
 119     m_s2z_search_apdu = 0;
 120     m_s2z_present_apdu = 0;
 121     m_http_keepalive = 0;
 122     m_http_version = 0;
 123     m_soap_ns = 0;
 124     m_s2z_packing = Z_SRW_recordPacking_string;
 125     m_time_tv.tv_sec = 0;
 126     m_time_tv.tv_usec = 0;
 127 }
 128
 129 Yaz_Proxy::~Yaz_Proxy()
 130 {
 131     yaz_log(LOG_LOG, "%sClosed %d/%d sent/recv bytes total", m_session_str,
 132             m_bytes_sent, m_bytes_recv);
 133     nmem_destroy(m_initRequest_mem);
 134     nmem_destroy(m_mem_invalid_session);
 135     xfree (m_proxyTarget);
 136     xfree (m_default_target);
 137     xfree (m_proxy_authentication);
 138     xfree (m_optimize);
 139     xfree (m_stylesheet_schema);
 140     xfree (m_schema);
 141     if (m_s2z_odr_init)
 142         odr_destroy(m_s2z_odr_init);
 143     if (m_s2z_odr_search)
 144         odr_destroy(m_s2z_odr_search);
 145     delete m_config;
 146 }
 147
 148 int Yaz_Proxy::set_config(const char *config)
 149 {
 150     delete m_config;
 151     m_config = new Yaz_ProxyConfig();
 152     xfree(m_config_fname);
 153     m_config_fname = xstrdup(config);
 154     int r = m_config->read_xml(config);
 155     if (!r)
 156         m_config->get_generic_info(&m_log_mask, &m_max_clients);
 157     return r;
 158 }
 159
 160 void Yaz_Proxy::set_default_target(const char *target)
 161 {
 162     xfree (m_default_target);
 163     m_default_target = 0;
 164     if (target)
 165         m_default_target = (char *) xstrdup (target);
 166 }
 167
 168 void Yaz_Proxy::set_proxy_authentication (const char *auth)
 169 {
 170     xfree (m_proxy_authentication);
 171     m_proxy_authentication = 0;
 172     if (auth)
 173         m_proxy_authentication = (char *) xstrdup (auth);
 174 }
 175
 176 Yaz_ProxyConfig *Yaz_Proxy::check_reconfigure()
 177 {
 178     if (m_parent)
 179         return m_parent->check_reconfigure();
 180
 181     Yaz_ProxyConfig *cfg = m_config;
 182     if (m_reconfig_flag)
 183     {
 184         yaz_log(LOG_LOG, "reconfigure");
 185         yaz_log_reopen();
 186         if (m_config_fname && cfg)
 187         {
 188             yaz_log(LOG_LOG, "reconfigure config %s", m_config_fname);
 189             int r = cfg->read_xml(m_config_fname);
 190             if (r)
 191                 yaz_log(LOG_WARN, "reconfigure failed");
 192             else
 193             {
 194                 m_log_mask = 0;
 195                 cfg->get_generic_info(&m_log_mask, &m_max_clients);
 196             }
 197         }
 198         else
 199             yaz_log(LOG_LOG, "reconfigure");
 200         m_reconfig_flag = 0;
 201     }
 202     return cfg;
 203 }
 204
 205 IYaz_PDU_Observer *Yaz_Proxy::sessionNotify(IYaz_PDU_Observable
 206                                             *the_PDU_Observable, int fd)
 207 {
 208     check_reconfigure();
 209     Yaz_Proxy *new_proxy = new Yaz_Proxy(the_PDU_Observable, this);
 210     new_proxy->m_config = 0;
 211     new_proxy->m_config_fname = 0;
 212     new_proxy->timeout(m_client_idletime);
 213     new_proxy->m_target_idletime = m_target_idletime;
 214     new_proxy->set_default_target(m_default_target);
 215     new_proxy->m_max_clients = m_max_clients;
 216     new_proxy->m_log_mask = m_log_mask;
 217     new_proxy->set_APDU_log(get_APDU_log());
 218     if (m_log_mask & PROXY_LOG_APDU_CLIENT)
 219         new_proxy->set_APDU_yazlog(1);
 220     else
 221         new_proxy->set_APDU_yazlog(0);
 222     new_proxy->set_proxy_authentication(m_proxy_authentication);
 223     sprintf(new_proxy->m_session_str, "%ld:%d ", (long) time(0), m_session_no);
 224     m_session_no++;
 225     yaz_log (LOG_LOG, "%sNew session %s", new_proxy->m_session_str,
 226              the_PDU_Observable->getpeername());
 227     return new_proxy;
 228 }
 229
 230 char *Yaz_Proxy::get_cookie(Z_OtherInformation **otherInfo)
 231 {
 232     int oid[OID_SIZE];
 233     Z_OtherInformationUnit *oi;
 234     struct oident ent;
 235     ent.proto = PROTO_Z3950;
 236     ent.oclass = CLASS_USERINFO;
 237     ent.value = (oid_value) VAL_COOKIE;
 238     assert (oid_ent_to_oid (&ent, oid));
 239
 240     if (oid_ent_to_oid (&ent, oid) &&
 241         (oi = update_otherInformation(otherInfo, 0, oid, 1, 1)) &&
 242         oi->which == Z_OtherInfo_characterInfo)
 243         return oi->information.characterInfo;
 244     return 0;
 245 }
 246
 247 char *Yaz_Proxy::get_proxy(Z_OtherInformation **otherInfo)
 248 {
 249     int oid[OID_SIZE];
 250     Z_OtherInformationUnit *oi;
 251     struct oident ent;
 252     ent.proto = PROTO_Z3950;
 253     ent.oclass = CLASS_USERINFO;
 254     ent.value = (oid_value) VAL_PROXY;
 255     if (oid_ent_to_oid (&ent, oid) &&
 256         (oi = update_otherInformation(otherInfo, 0, oid, 1, 1)) &&
 257         oi->which == Z_OtherInfo_characterInfo)
 258         return oi->information.characterInfo;
 259     return 0;
 260 }
 261
 262 const char *Yaz_Proxy::load_balance(const char **url)
 263 {
 264     int zurl_in_use[MAX_ZURL_PLEX];
 265     Yaz_ProxyClient *c;
 266     int i;
 267
 268     for (i = 0; i<MAX_ZURL_PLEX; i++)
 269         zurl_in_use[i] = 0;
 270     for (c = m_parent->m_clientPool; c; c = c->m_next)
 271     {
 272         for (i = 0; url[i]; i++)
 273             if (!strcmp(url[i], c->get_hostname()))
 274                 zurl_in_use[i]++;
 275     }
 276     int min = 100000;
 277     const char *ret = 0;
 278     for (i = 0; url[i]; i++)
 279     {
 280         yaz_log(LOG_DEBUG, "%szurl=%s use=%d",
 281                 m_session_str, url[i], zurl_in_use[i]);
 282         if (min > zurl_in_use[i])
 283         {
 284             ret = url[i];
 285             min = zurl_in_use[i];
 286         }
 287     }
 288     return ret;
 289 }
 290
 291 Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu, const char *cookie,
 292                                        const char *proxy_host)
 293 {
 294     assert (m_parent);
 295     Yaz_Proxy *parent = m_parent;
 296     Yaz_ProxyClient *c = m_client;
 297
 298     if (!m_proxyTarget)
 299     {
 300         const char *url[MAX_ZURL_PLEX];
 301         Yaz_ProxyConfig *cfg = check_reconfigure();
 302         if (proxy_host)
 303         {
 304 #if 1
 305 /* only to be enabled for debugging... */
 306             if (!strcmp(proxy_host, "stop"))
 307                 exit(0);
 308 #endif
 309             xfree(m_default_target);
 310             m_default_target = xstrdup(proxy_host);
 311             proxy_host = m_default_target;
 312         }
 313         int client_idletime = -1;
 314         const char *cql2rpn_fname = 0;
 315         url[0] = m_default_target;
 316         url[1] = 0;
 317         if (cfg)
 318         {
 319             int pre_init = 0;
 320             cfg->get_target_info(proxy_host, url, &m_bw_max,
 321                                  &m_pdu_max, &m_max_record_retrieve,
 322                                  &m_target_idletime, &client_idletime,
 323                                  &parent->m_max_clients,
 324                                  &m_keepalive_limit_bw,
 325                                  &m_keepalive_limit_pdu,
 326                                  &pre_init,
 327                                  &cql2rpn_fname);
 328         }
 329         if (client_idletime != -1)
 330         {
 331             m_client_idletime = client_idletime;
 332             timeout(m_client_idletime);
 333         }
 334         if (cql2rpn_fname)
 335             m_cql2rpn.set_pqf_file(cql2rpn_fname);
 336         if (!url[0])
 337         {
 338             yaz_log(LOG_LOG, "%sNo default target", m_session_str);
 339             return 0;
 340         }
 341         // we don't handle multiplexing for cookie session, so we just
 342         // pick the first one in this case (anonymous users will be able
 343         // to use any backend)
 344         if (cookie && *cookie)
 345             m_proxyTarget = (char*) xstrdup(url[0]);
 346         else
 347             m_proxyTarget = (char*) xstrdup(load_balance(url));
 348     }
 349     if (cookie && *cookie)
 350     {   // search in sessions with a cookie
 351         for (c = parent->m_clientPool; c; c = c->m_next)
 352         {
 353             assert (c->m_prev);
 354             assert (*c->m_prev == c);
 355             if (c->m_cookie && !strcmp(cookie,c->m_cookie) &&
 356                 !strcmp(m_proxyTarget, c->get_hostname()))
 357             {
 358                 // Found it in cache
 359                 // The following handles "cancel"
 360                 // If connection is busy (waiting for PDU) and
 361                 // we have an initRequest we can safely do re-open
 362                 if (c->m_waiting && apdu->which == Z_APDU_initRequest)
 363                 {
 364                     yaz_log (LOG_LOG, "%s REOPEN target=%s", m_session_str,
 365                              c->get_hostname());
 366                     c->close();
 367                     c->m_init_flag = 0;
 368
 369                     c->m_last_ok = 0;
 370                     c->m_cache.clear();
 371                     c->m_last_resultCount = 0;
 372                     c->m_sr_transform = 0;
 373                     c->m_waiting = 0;
 374                     c->m_resultSetStartPoint = 0;
 375                     c->m_target_idletime = m_target_idletime;
 376                     if (c->client(m_proxyTarget))
 377                     {
 378                         delete c;
 379                         return 0;
 380                     }
 381                     c->timeout(30);
 382                 }
 383                 c->m_seqno = parent->m_seqno;
 384                 if (c->m_server && c->m_server != this)
 385                     c->m_server->m_client = 0;
 386                 c->m_server = this;
 387                 (parent->m_seqno)++;
 388                 yaz_log (LOG_DEBUG, "get_client 1 %p %p", this, c);
 389                 return c;
 390             }
 391         }
 392     }
 393     else if (!c)
 394     {
 395         // don't have a client session yet. Search in session w/o cookie
 396         for (c = parent->m_clientPool; c; c = c->m_next)
 397         {
 398             assert (c->m_prev);
 399             assert (*c->m_prev == c);
 400             if (c->m_server == 0 && c->m_cookie == 0 &&
 401                 c->m_waiting == 0 &&
 402                 !strcmp(m_proxyTarget, c->get_hostname()))
 403             {
 404                 // found it in cache
 405                 yaz_log (LOG_LOG, "%sREUSE %s",
 406                          m_session_str, c->get_hostname());
 407
 408                 c->m_seqno = parent->m_seqno;
 409                 assert(c->m_server == 0);
 410                 c->m_server = this;
 411
 412                 if (parent->m_log_mask & PROXY_LOG_APDU_SERVER)
 413                     c->set_APDU_yazlog(1);
 414                 else
 415                     c->set_APDU_yazlog(0);
 416
 417                 (parent->m_seqno)++;
 418
 419                 parent->pre_init();
 420
 421                 return c;
 422             }
 423         }
 424     }
 425     if (!m_client)
 426     {
 427         if (apdu->which != Z_APDU_initRequest)
 428         {
 429             yaz_log (LOG_LOG, "no first INIT!");
 430             return 0;
 431         }
 432         Z_InitRequest *initRequest = apdu->u.initRequest;
 433
 434         if (!initRequest->idAuthentication)
 435         {
 436             if (m_proxy_authentication)
 437             {
 438                 initRequest->idAuthentication =
 439                     (Z_IdAuthentication *)
 440                     odr_malloc (odr_encode(),
 441                                 sizeof(*initRequest->idAuthentication));
 442                 initRequest->idAuthentication->which =
 443                     Z_IdAuthentication_open;
 444                 initRequest->idAuthentication->u.open =
 445                     odr_strdup (odr_encode(), m_proxy_authentication);
 446             }
 447         }
 448
 449         // go through list of clients - and find the lowest/oldest one.
 450         Yaz_ProxyClient *c_min = 0;
 451         int min_seq = -1;
 452         int no_of_clients = 0;
 453         if (parent->m_clientPool)
 454             yaz_log (LOG_DEBUG, "Existing sessions");
 455         for (c = parent->m_clientPool; c; c = c->m_next)
 456         {
 457             yaz_log (LOG_DEBUG, " Session %-3d wait=%d %s cookie=%s", c->m_seqno,
 458                                c->m_waiting, c->get_hostname(),
 459                                c->m_cookie ? c->m_cookie : "");
 460             no_of_clients++;
 461             if (min_seq < 0 || c->m_seqno < min_seq)
 462             {
 463                 min_seq = c->m_seqno;
 464                 c_min = c;
 465             }
 466         }
 467         if (no_of_clients >= parent->m_max_clients)
 468         {
 469             c = c_min;
 470             if (c->m_waiting || strcmp(m_proxyTarget, c->get_hostname()))
 471             {
 472                 yaz_log (LOG_LOG, "%sMAXCLIENTS Destroy %d",
 473                          m_session_str, c->m_seqno);
 474                 if (c->m_server && c->m_server != this)
 475                     delete c->m_server;
 476                 c->m_server = 0;
 477             }
 478             else
 479             {
 480                 yaz_log (LOG_LOG, "%sMAXCLIENTS Reuse %d %d %s",
 481                          m_session_str,
 482                          c->m_seqno, parent->m_seqno, c->get_hostname());
 483                 xfree (c->m_cookie);
 484                 c->m_cookie = 0;
 485                 if (cookie)
 486                     c->m_cookie = xstrdup(cookie);
 487                 c->m_seqno = parent->m_seqno;
 488                 if (c->m_server && c->m_server != this)
 489                 {
 490                     c->m_server->m_client = 0;
 491                     delete c->m_server;
 492                 }
 493                 (parent->m_seqno)++;
 494                 c->m_target_idletime = m_target_idletime;
 495                 c->timeout(m_target_idletime);
 496
 497                 if (parent->m_log_mask & PROXY_LOG_APDU_SERVER)
 498                     c->set_APDU_yazlog(1);
 499                 else
 500                     c->set_APDU_yazlog(0);
 501
 502                 return c;
 503             }
 504         }
 505         else
 506         {
 507             yaz_log (LOG_LOG, "%sNEW %d %s",
 508                      m_session_str, parent->m_seqno, m_proxyTarget);
 509             c = new Yaz_ProxyClient(m_PDU_Observable->clone(), parent);
 510             c->m_next = parent->m_clientPool;
 511             if (c->m_next)
 512                 c->m_next->m_prev = &c->m_next;
 513             parent->m_clientPool = c;
 514             c->m_prev = &parent->m_clientPool;
 515         }
 516
 517         xfree (c->m_cookie);
 518         c->m_cookie = 0;
 519         if (cookie)
 520             c->m_cookie = xstrdup(cookie);
 521
 522         c->m_seqno = parent->m_seqno;
 523         c->m_init_flag = 0;
 524         c->m_last_resultCount = 0;
 525         c->m_last_ok = 0;
 526         c->m_cache.clear();
 527         c->m_sr_transform = 0;
 528         c->m_waiting = 0;
 529         c->m_resultSetStartPoint = 0;
 530         (parent->m_seqno)++;
 531         if (c->client(m_proxyTarget))
 532         {
 533             delete c;
 534             return 0;
 535         }
 536         c->m_target_idletime = m_target_idletime;
 537         c->timeout(30);
 538
 539         if (parent->m_log_mask & PROXY_LOG_APDU_SERVER)
 540             c->set_APDU_yazlog(1);
 541         else
 542             c->set_APDU_yazlog(0);
 543     }
 544     yaz_log (LOG_DEBUG, "get_client 3 %p %p", this, c);
 545     return c;
 546 }
 547
 548 void Yaz_Proxy::display_diagrecs(Z_DiagRec **pp, int num)
 549 {
 550     int i;
 551     for (i = 0; i<num; i++)
 552     {
 553         oident *ent;
 554         Z_DefaultDiagFormat *r;
 555         Z_DiagRec *p = pp[i];
 556         if (p->which != Z_DiagRec_defaultFormat)
 557         {
 558             yaz_log(LOG_LOG, "%sError no diagnostics", m_session_str);
 559             return;
 560         }
 561         else
 562             r = p->u.defaultFormat;
 563         if (!(ent = oid_getentbyoid(r->diagnosticSetId)) ||
 564             ent->oclass != CLASS_DIAGSET || ent->value != VAL_BIB1)
 565             yaz_log(LOG_LOG, "%sError unknown diagnostic set", m_session_str);
 566         switch (r->which)
 567         {
 568         case Z_DefaultDiagFormat_v2Addinfo:
 569             yaz_log(LOG_LOG, "%sError %d %s:%s",
 570                     m_session_str,
 571                     *r->condition, diagbib1_str(*r->condition),
 572                     r->u.v2Addinfo);
 573             break;
 574         case Z_DefaultDiagFormat_v3Addinfo:
 575             yaz_log(LOG_LOG, "%sError %d %s:%s",
 576                     m_session_str,
 577                     *r->condition, diagbib1_str(*r->condition),
 578                     r->u.v3Addinfo);
 579             break;
 580         }
 581     }
 582 }
 583
 584 void Yaz_Proxy::convert_xsl(Z_NamePlusRecordList *p)
 585 {
 586     if (!m_stylesheet_schema)
 587         return;
 588     xmlDocPtr xslt_doc = xmlParseFile(m_stylesheet_schema);
 589     xsltStylesheetPtr xsp;
 590
 591     xsp = xsltParseStylesheetDoc(xslt_doc);
 592
 593     int i;
 594     for (i = 0; i < p->num_records; i++)
 595     {
 596         Z_NamePlusRecord *npr = p->records[i];
 597         if (npr->which == Z_NamePlusRecord_databaseRecord)
 598         {
 599             Z_External *r = npr->u.databaseRecord;
 600             if (r->which == Z_External_octet)
 601             {
 602                 xmlDocPtr res, doc = xmlParseMemory(
 603                     (char*) r->u.octet_aligned->buf,
 604                     r->u.octet_aligned->len);
 605
 606                 res = xsltApplyStylesheet(xsp, doc, 0);
 607
 608                 xmlChar *out_buf;
 609                 int out_len;
 610                 xmlDocDumpMemory (res, &out_buf, &out_len);
 611                 p->records[i]->u.databaseRecord =
 612                     z_ext_record(odr_encode(), VAL_TEXT_XML,
 613                                  (char*) out_buf, out_len);
 614                 xmlFree(out_buf);
 615                 xmlFreeDoc(doc);
 616                 xmlFreeDoc(res);
 617             }
 618         }
 619     }
 620     xsltFreeStylesheet(xsp);
 621 }
 622
 623 void Yaz_Proxy::convert_to_marcxml(Z_NamePlusRecordList *p)
 624 {
 625     int i;
 626
 627     yaz_marc_t mt = yaz_marc_create();
 628     yaz_marc_xml(mt, YAZ_MARC_MARCXML);
 629     for (i = 0; i < p->num_records; i++)
 630     {
 631         Z_NamePlusRecord *npr = p->records[i];
 632         if (npr->which == Z_NamePlusRecord_databaseRecord)
 633         {
 634             Z_External *r = npr->u.databaseRecord;
 635             if (r->which == Z_External_octet)
 636             {
 637                 int rlen;
 638                 char *result;
 639                 if (yaz_marc_decode_buf(mt, (char*) r->u.octet_aligned->buf,
 640                                         r->u.octet_aligned->len,
 641                                         &result, &rlen))
 642                 {
 643                     yaz_iconv_t cd = yaz_iconv_open("UTF-8", "MARC-8");
 644                     WRBUF wrbuf = wrbuf_alloc();
 645
 646                     char outbuf[120];
 647                     size_t inbytesleft = rlen;
 648                     const char *inp = result;
 649                     while (cd && inbytesleft)
 650                     {
 651                         size_t outbytesleft = sizeof(outbuf);
 652                         char *outp = outbuf;
 653                         size_t r;
 654
 655                         r = yaz_iconv (cd, (char**) &inp,
 656                                        &inbytesleft,
 657                                        &outp, &outbytesleft);
 658                         if (r == (size_t) (-1))
 659                         {
 660                             int e = yaz_iconv_error(cd);
 661                             if (e != YAZ_ICONV_E2BIG)
 662                             {
 663                                 yaz_log(LOG_WARN, "conversion failure");
 664                                 break;
 665                             }
 666                         }
 667                         wrbuf_write(wrbuf, outbuf, outp - outbuf);
 668                     }
 669                     if (cd)
 670                         yaz_iconv_close(cd);
 671
 672                     npr->u.databaseRecord = z_ext_record(odr_encode(),
 673                                                          VAL_TEXT_XML,
 674                                                          wrbuf_buf(wrbuf),
 675                                                          wrbuf_len(wrbuf));
 676                     wrbuf_free(wrbuf, 1);
 677                 }
 678             }
 679         }
 680     }
 681     yaz_marc_destroy(mt);
 682 }
 683
 684 void Yaz_Proxy::logtime()
 685 {
 686     if (m_time_tv.tv_sec)
 687     {
 688         struct timeval tv;
 689         gettimeofday(&tv, 0);
 690         long diff = (tv.tv_sec - m_time_tv.tv_sec)*1000000 +
 691             (tv.tv_usec - m_time_tv.tv_usec);
 692         if (diff >= 0)
 693             yaz_log(LOG_LOG, "%sElapsed %ld.%03ld", m_session_str,
 694                     diff/1000000, (diff/1000)%1000);
 695     }
 696     m_time_tv.tv_sec = 0;
 697     m_time_tv.tv_usec = 0;
 698 }
 699
 700 int Yaz_Proxy::send_http_response(int code)
 701 {
 702     ODR o = odr_encode();
 703     Z_GDU *gdu = z_get_HTTP_Response(o, code);
 704     Z_HTTP_Response *hres = gdu->u.HTTP_Response;
 705     if (m_http_version)
 706         hres->version = odr_strdup(o, m_http_version);
 707     m_http_keepalive = 0;
 708     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
 709     {
 710         yaz_log (LOG_LOG, "%sSending %s to client", m_session_str,
 711                  gdu_name(gdu));
 712     }
 713     int len;
 714     int r = send_GDU(gdu, &len);
 715     logtime();
 716     return r;
 717 }
 718
 719 int Yaz_Proxy::send_srw_response(Z_SRW_PDU *srw_pdu)
 720 {
 721     ODR o = odr_encode();
 722     const char *ctype = "text/xml";
 723     Z_GDU *gdu = z_get_HTTP_Response(o, 200);
 724     Z_HTTP_Response *hres = gdu->u.HTTP_Response;
 725     if (m_http_version)
 726         hres->version = odr_strdup(o, m_http_version);
 727     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
 728     if (m_http_keepalive)
 729         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
 730
 731     static Z_SOAP_Handler soap_handlers[2] = {
 732 #if HAVE_XSLT
 733         {"http://www.loc.gov/zing/srw/", 0,
 734          (Z_SOAP_fun) yaz_srw_codec},
 735 #endif
 736         {0, 0, 0}
 737     };
 738
 739     Z_SOAP *soap_package = (Z_SOAP*) odr_malloc(o, sizeof(Z_SOAP));
 740     soap_package->which = Z_SOAP_generic;
 741     soap_package->u.generic =
 742         (Z_SOAP_Generic *) odr_malloc(o,  sizeof(*soap_package->u.generic));
 743     soap_package->u.generic->no = 0;
 744     soap_package->u.generic->ns = soap_handlers[0].ns;
 745     soap_package->u.generic->p = (void *) srw_pdu;
 746     soap_package->ns = m_soap_ns;
 747     z_soap_codec_enc_xsl(o, &soap_package,
 748                          &hres->content_buf, &hres->content_len,
 749                          soap_handlers, 0, m_s2z_stylesheet);
 750     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
 751     {
 752         yaz_log (LOG_LOG, "%sSending %s to client", m_session_str,
 753                  gdu_name(gdu));
 754     }
 755     int len;
 756     int r = send_GDU(gdu, &len);
 757     logtime();
 758     return r;
 759 }
 760
 761 int Yaz_Proxy::send_to_srw_client_error(int srw_error, const char *add)
 762 {
 763     ODR o = odr_encode();
 764     Z_SRW_PDU *srw_pdu = yaz_srw_get(o, Z_SRW_searchRetrieve_response);
 765     Z_SRW_searchRetrieveResponse *srw_res = srw_pdu->u.response;
 766
 767     srw_res->num_diagnostics = 1;
 768     srw_res->diagnostics = (Z_SRW_diagnostic *)
 769         odr_malloc(o, sizeof(*srw_res->diagnostics));
 770     srw_res->diagnostics[0].code =  odr_intdup(o, srw_error);
 771     srw_res->diagnostics[0].details = add ? odr_strdup(o, add) : 0;
 772     return send_srw_response(srw_pdu);
 773 }
 774
 775 int Yaz_Proxy::z_to_srw_diag(ODR o, Z_SRW_searchRetrieveResponse *srw_res,
 776                              Z_DefaultDiagFormat *ddf)
 777 {
 778     int bib1_code = *ddf->condition;
 779     if (bib1_code == 109)
 780         return 404;
 781     srw_res->num_diagnostics = 1;
 782     srw_res->diagnostics = (Z_SRW_diagnostic *)
 783         odr_malloc(o, sizeof(*srw_res->diagnostics));
 784     srw_res->diagnostics[0].code =
 785         odr_intdup(o, yaz_diag_bib1_to_srw(*ddf->condition));
 786     srw_res->diagnostics[0].details = ddf->u.v2Addinfo;
 787     return 0;
 788 }
 789
 790 int Yaz_Proxy::send_to_srw_client_ok(int hits, Z_Records *records, int start)
 791 {
 792     ODR o = odr_encode();
 793     Z_SRW_PDU *srw_pdu = yaz_srw_get(o, Z_SRW_searchRetrieve_response);
 794     Z_SRW_searchRetrieveResponse *srw_res = srw_pdu->u.response;
 795
 796     srw_res->numberOfRecords = odr_intdup (o, hits);
 797     if (records && records->which == Z_Records_DBOSD)
 798     {
 799         srw_res->num_records =
 800             records->u.databaseOrSurDiagnostics->num_records;
 801         int i;
 802         srw_res->records = (Z_SRW_record *)
 803             odr_malloc(o, srw_res->num_records * sizeof(Z_SRW_record));
 804         for (i = 0; i < srw_res->num_records; i++)
 805         {
 806             Z_NamePlusRecord *npr = records->u.databaseOrSurDiagnostics->records[i];
 807             if (npr->which != Z_NamePlusRecord_databaseRecord)
 808             {
 809                 srw_res->records[i].recordSchema = "diagnostic";
 810                 srw_res->records[i].recordPacking = m_s2z_packing;
 811                 srw_res->records[i].recordData_buf = "67";
 812                 srw_res->records[i].recordData_len = 2;
 813                 srw_res->records[i].recordPosition = odr_intdup(o, i+start);
 814                 continue;
 815             }
 816             Z_External *r = npr->u.databaseRecord;
 817             oident *ent = oid_getentbyoid(r->direct_reference);
 818             if (r->which == Z_External_octet && ent->value == VAL_TEXT_XML)
 819             {
 820                 srw_res->records[i].recordSchema = m_schema;
 821                 srw_res->records[i].recordPacking = m_s2z_packing;
 822                 srw_res->records[i].recordData_buf = (char*)
 823                     r->u.octet_aligned->buf;
 824                 srw_res->records[i].recordData_len = r->u.octet_aligned->len;
 825                 srw_res->records[i].recordPosition = odr_intdup(o, i+start);
 826             }
 827             else
 828             {
 829                 srw_res->records[i].recordSchema = "diagnostic";
 830                 srw_res->records[i].recordPacking = m_s2z_packing;
 831                 srw_res->records[i].recordData_buf = "67";
 832                 srw_res->records[i].recordData_len = 2;
 833                 srw_res->records[i].recordPosition = odr_intdup(o, i+start);
 834             }
 835         }
 836     }
 837     if (records && records->which == Z_Records_NSD)
 838     {
 839         int http_code;
 840         http_code = z_to_srw_diag(odr_encode(), srw_res,
 841                                    records->u.nonSurrogateDiagnostic);
 842         if (http_code)
 843             return send_http_response(http_code);
 844     }
 845     return send_srw_response(srw_pdu);
 846
 847 }
 848
 849 int Yaz_Proxy::send_srw_explain_response(Z_SRW_diagnostic *diagnostics,
 850                                         int num_diagnostics)
 851 {
 852     Z_SRW_PDU *res = yaz_srw_get(odr_encode(), Z_SRW_explain_response);
 853     Z_SRW_explainResponse *er = res->u.explain_response;
 854
 855     Yaz_ProxyConfig *cfg = check_reconfigure();
 856     if (cfg)
 857     {
 858         int len;
 859         char *b = cfg->get_explain(odr_encode(), 0 /* target */,
 860                                    0 /* db */, &len);
 861         if (b)
 862         {
 863             er->record.recordData_buf = b;
 864             er->record.recordData_len = len;
 865             er->record.recordPacking = m_s2z_packing;
 866         }
 867     }
 868     er->diagnostics = diagnostics;
 869     er->num_diagnostics = num_diagnostics;
 870     return send_srw_response(res);
 871 }
 872
 873 int Yaz_Proxy::send_PDU_convert(Z_APDU *apdu, int *len)
 874 {
 875     if (m_http_version)
 876     {
 877         if (apdu->which == Z_APDU_initResponse)
 878         {
 879             Z_InitResponse *res = apdu->u.initResponse;
 880             if (*res->result == 0)
 881             {
 882                 send_to_srw_client_error(3, 0);
 883             }
 884             else if (!m_s2z_search_apdu)
 885             {
 886                 send_srw_explain_response(0, 0);
 887             }
 888             else
 889             {
 890                 handle_incoming_Z_PDU(m_s2z_search_apdu);
 891             }
 892         }
 893         else if (m_s2z_search_apdu && apdu->which == Z_APDU_searchResponse)
 894         {
 895             m_s2z_search_apdu = 0;
 896             Z_SearchResponse *res = apdu->u.searchResponse;
 897             m_s2z_hit_count = *res->resultCount;
 898             if (res->records && res->records->which == Z_Records_NSD)
 899             {
 900                 send_to_srw_client_ok(0, res->records, 1);
 901             }
 902             else if (m_s2z_present_apdu)
 903             {
 904                 // adjust
 905                 Z_PresentRequest *pr = m_s2z_present_apdu->u.presentRequest;
 906
 907                 if (*pr->resultSetStartPoint <= m_s2z_hit_count)
 908                 {
 909                     if (*pr->numberOfRecordsRequested+ *pr->resultSetStartPoint
 910                         > m_s2z_hit_count)
 911                         *pr->numberOfRecordsRequested =
 912                             1 + m_s2z_hit_count - *pr->resultSetStartPoint;
 913                 }
 914                 handle_incoming_Z_PDU(m_s2z_present_apdu);
 915             }
 916             else
 917             {
 918                 send_to_srw_client_ok(m_s2z_hit_count, res->records, 1);
 919             }
 920         }
 921         else if (m_s2z_present_apdu && apdu->which == Z_APDU_presentResponse)
 922         {
 923             int start =
 924                 *m_s2z_present_apdu->u.presentRequest->resultSetStartPoint;
 925
 926             m_s2z_present_apdu = 0;
 927             Z_PresentResponse *res = apdu->u.presentResponse;
 928             send_to_srw_client_ok(m_s2z_hit_count, res->records, start);
 929         }
 930     }
 931     else
 932     {
 933         if (m_log_mask & PROXY_LOG_REQ_CLIENT)
 934             yaz_log (LOG_LOG, "%sSending %s to client", m_session_str,
 935                      apdu_name(apdu));
 936         int r = send_Z_PDU(apdu, len);
 937         logtime();
 938         return r;
 939     }
 940     return 0;
 941 }
 942
 943 int Yaz_Proxy::send_to_client(Z_APDU *apdu)
 944 {
 945     int len = 0;
 946     int kill_session = 0;
 947     if (apdu->which == Z_APDU_searchResponse)
 948     {
 949         Z_SearchResponse *sr = apdu->u.searchResponse;
 950         Z_Records *p = sr->records;
 951         if (p && p->which == Z_Records_NSD)
 952         {
 953             Z_DiagRec dr, *dr_p = &dr;
 954             dr.which = Z_DiagRec_defaultFormat;
 955             dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
 956
 957             *sr->searchStatus = 0;
 958             display_diagrecs(&dr_p, 1);
 959         }
 960         else
 961         {
 962             if (p && p->which == Z_Records_DBOSD)
 963             {
 964                 if (m_marcxml_flag)
 965                     convert_to_marcxml(p->u.databaseOrSurDiagnostics);
 966                 convert_xsl(p->u.databaseOrSurDiagnostics);
 967             }
 968             if (sr->resultCount)
 969             {
 970                 yaz_log(LOG_LOG, "%s%d hits", m_session_str,
 971                         *sr->resultCount);
 972                 if (*sr->resultCount < 0)
 973                 {
 974                     m_invalid_session = 1;
 975                     kill_session = 1;
 976
 977                     *sr->searchStatus = 0;
 978                     sr->records =
 979                         create_nonSurrogateDiagnostics(odr_encode(), 2, 0);
 980                     *sr->resultCount = 0;
 981                 }
 982             }
 983         }
 984     }
 985     else if (apdu->which == Z_APDU_presentResponse)
 986     {
 987         Z_PresentResponse *sr = apdu->u.presentResponse;
 988         Z_Records *p = sr->records;
 989         if (p && p->which == Z_Records_NSD)
 990         {
 991             Z_DiagRec dr, *dr_p = &dr;
 992             dr.which = Z_DiagRec_defaultFormat;
 993             dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
 994             if (*sr->presentStatus == Z_PresentStatus_success)
 995                 *sr->presentStatus = Z_PresentStatus_failure;
 996             display_diagrecs(&dr_p, 1);
 997         }
 998         if (p && p->which == Z_Records_DBOSD)
 999         {
1000             if (m_marcxml_flag)
1001                 convert_to_marcxml(p->u.databaseOrSurDiagnostics);
1002             convert_xsl(p->u.databaseOrSurDiagnostics);
1003         }
1004     }
1005     int r = send_PDU_convert(apdu, &len);
1006     if (r)
1007         return r;
1008     m_bytes_sent += len;
1009     m_bw_stat.add_bytes(len);
1010     if (kill_session)
1011     {
1012         delete m_client;
1013         m_client = 0;
1014         m_parent->pre_init();
1015     }
1016     if (m_http_version)
1017     {
1018         if (!m_http_keepalive)
1019         {
1020 #if 1
1021             timeout(1);
1022 #else
1023             shutdown();
1024             return -1;
1025 #endif
1026         }
1027     }
1028     return r;
1029 }
1030
1031 int Yaz_ProxyClient::send_to_target(Z_APDU *apdu)
1032 {
1033     int len = 0;
1034     const char *apdu_name_tmp = apdu_name(apdu);
1035     int r = send_Z_PDU(apdu, &len);
1036     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
1037         yaz_log (LOG_LOG, "%sSending %s to %s %d bytes",
1038                  get_session_str(),
1039                  apdu_name_tmp, get_hostname(), len);
1040     m_bytes_sent += len;
1041     return r;
1042 }
1043
1044 Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
1045 {
1046     if (apdu->which == Z_APDU_presentRequest)
1047     {
1048         Z_PresentRequest *pr = apdu->u.presentRequest;
1049         int toget = *pr->numberOfRecordsRequested;
1050         int start = *pr->resultSetStartPoint;
1051
1052         yaz_log(LOG_LOG, "%sPresent %s %d+%d", m_session_str,
1053                 pr->resultSetId, start, toget);
1054
1055         if (*m_parent->m_optimize == '0')
1056             return apdu;
1057
1058         if (!m_client->m_last_resultSetId)
1059         {
1060             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1061             new_apdu->u.presentResponse->records =
1062                 create_nonSurrogateDiagnostics(odr_encode(), 30,
1063                                                pr->resultSetId);
1064             send_to_client(new_apdu);
1065             return 0;
1066         }
1067         if (!strcmp(m_client->m_last_resultSetId, pr->resultSetId))
1068         {
1069             if (start+toget-1 > m_client->m_last_resultCount)
1070             {
1071                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1072                 new_apdu->u.presentResponse->records =
1073                     create_nonSurrogateDiagnostics(odr_encode(), 13, 0);
1074                 send_to_client(new_apdu);
1075                 return 0;
1076             }
1077             Z_NamePlusRecordList *npr;
1078             if (m_client->m_cache.lookup (odr_encode(), &npr, start, toget,
1079                                           pr->preferredRecordSyntax,
1080                                           pr->recordComposition))
1081             {
1082                 yaz_log (LOG_LOG, "%sReturned cached records for present request",
1083                          m_session_str);
1084                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1085                 new_apdu->u.presentResponse->referenceId = pr->referenceId;
1086
1087                 new_apdu->u.presentResponse->numberOfRecordsReturned
1088                     = odr_intdup(odr_encode(), toget);
1089
1090                 new_apdu->u.presentResponse->records = (Z_Records*)
1091                     odr_malloc(odr_encode(), sizeof(Z_Records));
1092                 new_apdu->u.presentResponse->records->which = Z_Records_DBOSD;
1093                 new_apdu->u.presentResponse->records->u.databaseOrSurDiagnostics = npr;
1094                 new_apdu->u.presentResponse->nextResultSetPosition =
1095                     odr_intdup(odr_encode(), start+toget);
1096
1097                 send_to_client(new_apdu);
1098                 return 0;
1099             }
1100         }
1101     }
1102
1103     if (apdu->which != Z_APDU_searchRequest)
1104         return apdu;
1105     Z_SearchRequest *sr = apdu->u.searchRequest;
1106     Yaz_Z_Query *this_query = new Yaz_Z_Query;
1107     Yaz_Z_Databases this_databases;
1108
1109     this_databases.set(sr->num_databaseNames, (const char **)
1110                        sr->databaseNames);
1111
1112     this_query->set_Z_Query(sr->query);
1113
1114     char query_str[120];
1115     this_query->print(query_str, sizeof(query_str)-1);
1116     yaz_log(LOG_LOG, "%sSearch %s", m_session_str, query_str);
1117
1118     if (*m_parent->m_optimize != '0' &&
1119         m_client->m_last_ok && m_client->m_last_query &&
1120         m_client->m_last_query->match(this_query) &&
1121         !strcmp(m_client->m_last_resultSetId, sr->resultSetName) &&
1122         m_client->m_last_databases.match(this_databases))
1123     {
1124         delete this_query;
1125         if (m_client->m_last_resultCount > *sr->smallSetUpperBound &&
1126             m_client->m_last_resultCount < *sr->largeSetLowerBound)
1127         {
1128             Z_NamePlusRecordList *npr;
1129             int toget = *sr->mediumSetPresentNumber;
1130             Z_RecordComposition *comp = 0;
1131
1132             if (toget > m_client->m_last_resultCount)
1133                 toget = m_client->m_last_resultCount;
1134
1135             if (sr->mediumSetElementSetNames)
1136             {
1137                 comp = (Z_RecordComposition *)
1138                     odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
1139                 comp->which = Z_RecordComp_simple;
1140                 comp->u.simple = sr->mediumSetElementSetNames;
1141             }
1142
1143             if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
1144                                           sr->preferredRecordSyntax, comp))
1145             {
1146                 yaz_log (LOG_LOG, "%sReturned cached records for medium set",
1147                          m_session_str);
1148                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1149                 new_apdu->u.searchResponse->referenceId = sr->referenceId;
1150                 new_apdu->u.searchResponse->resultCount =
1151                     &m_client->m_last_resultCount;
1152
1153                 new_apdu->u.searchResponse->numberOfRecordsReturned
1154                     = odr_intdup(odr_encode(), toget);
1155
1156                 new_apdu->u.searchResponse->presentStatus =
1157                     odr_intdup(odr_encode(), Z_PresentStatus_success);
1158                 new_apdu->u.searchResponse->records = (Z_Records*)
1159                     odr_malloc(odr_encode(), sizeof(Z_Records));
1160                 new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
1161                 new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
1162                 new_apdu->u.searchResponse->nextResultSetPosition =
1163                     odr_intdup(odr_encode(), toget+1);
1164                 send_to_client(new_apdu);
1165                 return 0;
1166             }
1167             else
1168             {
1169                 // medium Set
1170                 // send present request (medium size)
1171                 yaz_log (LOG_LOG, "%sOptimizing search for medium set",
1172                          m_session_str);
1173
1174                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
1175                 Z_PresentRequest *pr = new_apdu->u.presentRequest;
1176                 pr->referenceId = sr->referenceId;
1177                 pr->resultSetId = sr->resultSetName;
1178                 pr->preferredRecordSyntax = sr->preferredRecordSyntax;
1179                 *pr->numberOfRecordsRequested = toget;
1180                 pr->recordComposition = comp;
1181                 m_client->m_sr_transform = 1;
1182                 return new_apdu;
1183             }
1184         }
1185         else if (m_client->m_last_resultCount >= *sr->largeSetLowerBound ||
1186             m_client->m_last_resultCount <= 0)
1187         {
1188             // large set. Return pseudo-search response immediately
1189             yaz_log (LOG_LOG, "%sOptimizing search for large set",
1190                      m_session_str);
1191             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1192             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1193             new_apdu->u.searchResponse->resultCount =
1194                 &m_client->m_last_resultCount;
1195             send_to_client(new_apdu);
1196             return 0;
1197         }
1198         else
1199         {
1200             Z_NamePlusRecordList *npr;
1201             int toget = m_client->m_last_resultCount;
1202             Z_RecordComposition *comp = 0;
1203             // small set
1204             // send a present request (small set)
1205
1206             if (sr->smallSetElementSetNames)
1207             {
1208                 comp = (Z_RecordComposition *)
1209                     odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
1210                 comp->which = Z_RecordComp_simple;
1211                 comp->u.simple = sr->smallSetElementSetNames;
1212             }
1213
1214             if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
1215                                           sr->preferredRecordSyntax, comp))
1216             {
1217                 yaz_log (LOG_LOG, "%sReturned cached records for small set",
1218                          m_session_str);
1219                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1220                 new_apdu->u.searchResponse->referenceId = sr->referenceId;
1221                 new_apdu->u.searchResponse->resultCount =
1222                     &m_client->m_last_resultCount;
1223
1224                 new_apdu->u.searchResponse->numberOfRecordsReturned
1225                     = odr_intdup(odr_encode(), toget);
1226
1227                 new_apdu->u.searchResponse->presentStatus =
1228                     odr_intdup(odr_encode(), Z_PresentStatus_success);
1229                 new_apdu->u.searchResponse->records = (Z_Records*)
1230                     odr_malloc(odr_encode(), sizeof(Z_Records));
1231                 new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
1232                 new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
1233                 new_apdu->u.searchResponse->nextResultSetPosition =
1234                     odr_intdup(odr_encode(), toget+1);
1235                 send_to_client(new_apdu);
1236                 return 0;
1237             }
1238             else
1239             {
1240                 yaz_log (LOG_LOG, "%sOptimizing search for small set",
1241                          m_session_str);
1242                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
1243                 Z_PresentRequest *pr = new_apdu->u.presentRequest;
1244                 pr->referenceId = sr->referenceId;
1245                 pr->resultSetId = sr->resultSetName;
1246                 pr->preferredRecordSyntax = sr->preferredRecordSyntax;
1247                 *pr->numberOfRecordsRequested = toget;
1248                 pr->recordComposition = comp;
1249                 m_client->m_sr_transform = 1;
1250                 return new_apdu;
1251             }
1252         }
1253     }
1254     else  // query doesn't match
1255     {
1256         delete m_client->m_last_query;
1257         m_client->m_last_query = this_query;
1258         m_client->m_last_ok = 0;
1259         m_client->m_cache.clear();
1260         m_client->m_resultSetStartPoint = 0;
1261
1262         xfree (m_client->m_last_resultSetId);
1263         m_client->m_last_resultSetId = xstrdup (sr->resultSetName);
1264
1265         m_client->m_last_databases.set(sr->num_databaseNames,
1266                                        (const char **) sr->databaseNames);
1267     }
1268     return apdu;
1269 }
1270
1271
1272 void Yaz_Proxy::inc_request_no()
1273 {
1274     char *cp = strchr(m_session_str, ' ');
1275     m_request_no++;
1276     if (cp)
1277         sprintf(cp+1, "%d ", m_request_no);
1278 }
1279
1280 void Yaz_Proxy::recv_GDU(Z_GDU *apdu, int len)
1281 {
1282     inc_request_no();
1283
1284     m_bytes_recv += len;
1285
1286     if (m_log_mask & PROXY_LOG_APDU_CLIENT)
1287         yaz_log (LOG_DEBUG, "%sReceiving %s from client %d bytes",
1288                  m_session_str, gdu_name(apdu), len);
1289
1290     if (m_bw_hold_PDU)     // double incoming PDU. shutdown now.
1291         shutdown();
1292
1293     m_bw_stat.add_bytes(len);
1294     m_pdu_stat.add_bytes(1);
1295
1296     gettimeofday(&m_time_tv, 0);
1297
1298     int bw_total = m_bw_stat.get_total();
1299     int pdu_total = m_pdu_stat.get_total();
1300
1301     int reduce = 0;
1302     if (m_bw_max)
1303     {
1304         if (bw_total > m_bw_max)
1305         {
1306             reduce = (bw_total/m_bw_max);
1307         }
1308     }
1309     if (m_pdu_max)
1310     {
1311         if (pdu_total > m_pdu_max)
1312         {
1313             int nreduce = (m_pdu_max >= 60) ? 1 : 60/m_pdu_max;
1314             reduce = (reduce > nreduce) ? reduce : nreduce;
1315         }
1316     }
1317     if (reduce)
1318     {
1319         yaz_log(LOG_LOG, "%sdelay=%d bw=%d pdu=%d limit-bw=%d limit-pdu=%d",
1320                 m_session_str, reduce, bw_total, pdu_total,
1321                 m_bw_max, m_pdu_max);
1322
1323         m_bw_hold_PDU = apdu;  // save PDU and signal "on hold"
1324         timeout(reduce);       // call us reduce seconds later
1325     }
1326     else if (apdu->which == Z_GDU_Z3950)
1327         handle_incoming_Z_PDU(apdu->u.z3950);
1328     else if (apdu->which == Z_GDU_HTTP_Request)
1329         handle_incoming_HTTP(apdu->u.HTTP_Request);
1330 }
1331
1332 void Yaz_Proxy::handle_max_record_retrieve(Z_APDU *apdu)
1333 {
1334     if (m_max_record_retrieve)
1335     {
1336         if (apdu->which == Z_APDU_presentRequest)
1337         {
1338             Z_PresentRequest *pr = apdu->u.presentRequest;
1339             if (pr->numberOfRecordsRequested &&
1340                 *pr->numberOfRecordsRequested > m_max_record_retrieve)
1341                 *pr->numberOfRecordsRequested = m_max_record_retrieve;
1342         }
1343     }
1344 }
1345
1346 Z_Records *Yaz_Proxy::create_nonSurrogateDiagnostics(ODR odr,
1347                                                      int error,
1348                                                      const char *addinfo)
1349 {
1350     Z_Records *rec = (Z_Records *)
1351         odr_malloc (odr, sizeof(*rec));
1352     int *err = (int *)
1353         odr_malloc (odr, sizeof(*err));
1354     Z_DiagRec *drec = (Z_DiagRec *)
1355         odr_malloc (odr, sizeof(*drec));
1356     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
1357         odr_malloc (odr, sizeof(*dr));
1358     *err = error;
1359     rec->which = Z_Records_NSD;
1360     rec->u.nonSurrogateDiagnostic = dr;
1361     dr->diagnosticSetId =
1362         yaz_oidval_to_z3950oid (odr, CLASS_DIAGSET, VAL_BIB1);
1363     dr->condition = err;
1364     dr->which = Z_DefaultDiagFormat_v2Addinfo;
1365     dr->u.v2Addinfo = odr_strdup (odr, addinfo ? addinfo : "");
1366     return rec;
1367 }
1368
1369 Z_APDU *Yaz_Proxy::handle_query_transformation(Z_APDU *apdu)
1370 {
1371     if (apdu->which == Z_APDU_searchRequest &&
1372         apdu->u.searchRequest->query &&
1373         apdu->u.searchRequest->query->which == Z_Query_type_104 &&
1374         apdu->u.searchRequest->query->u.type_104->which == Z_External_CQL)
1375     {
1376         Z_RPNQuery *rpnquery = 0;
1377         Z_SearchRequest *sr = apdu->u.searchRequest;
1378         char *addinfo = 0;
1379
1380         yaz_log(LOG_LOG, "%sCQL: %s", m_session_str,
1381                 sr->query->u.type_104->u.cql);
1382
1383         int r = m_cql2rpn.query_transform(sr->query->u.type_104->u.cql,
1384                                           &rpnquery, odr_encode(),
1385                                           &addinfo);
1386         if (r == -3)
1387             yaz_log(LOG_LOG, "%sNo CQL to RPN table", m_session_str);
1388         else if (r)
1389         {
1390             yaz_log(LOG_LOG, "%sCQL Conversion error %d", m_session_str, r);
1391             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1392
1393             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1394             new_apdu->u.searchResponse->records =
1395                 create_nonSurrogateDiagnostics(odr_encode(),
1396                                                yaz_diag_srw_to_bib1(r),
1397                                                addinfo);
1398             *new_apdu->u.searchResponse->searchStatus = 0;
1399
1400             send_to_client(new_apdu);
1401
1402             return 0;
1403         }
1404         else
1405         {
1406             sr->query->which = Z_Query_type_1;
1407             sr->query->u.type_1 = rpnquery;
1408         }
1409         return apdu;
1410     }
1411     return apdu;
1412 }
1413
1414 Z_APDU *Yaz_Proxy::handle_query_validation(Z_APDU *apdu)
1415 {
1416     if (apdu->which == Z_APDU_searchRequest)
1417     {
1418         Z_SearchRequest *sr = apdu->u.searchRequest;
1419         int err = 0;
1420         char *addinfo = 0;
1421
1422         Yaz_ProxyConfig *cfg = check_reconfigure();
1423         if (cfg)
1424             err = cfg->check_query(odr_encode(), m_default_target,
1425                                    sr->query, &addinfo);
1426         if (err)
1427         {
1428             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1429
1430             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1431             new_apdu->u.searchResponse->records =
1432                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
1433             *new_apdu->u.searchResponse->searchStatus = 0;
1434
1435             send_to_client(new_apdu);
1436
1437             return 0;
1438         }
1439     }
1440     return apdu;
1441 }
1442
1443 Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
1444 {
1445     m_marcxml_flag = 0;
1446     if (apdu->which == Z_APDU_searchRequest)
1447     {
1448         Z_SearchRequest *sr = apdu->u.searchRequest;
1449         int err = 0;
1450         char *addinfo = 0;
1451         Yaz_ProxyConfig *cfg = check_reconfigure();
1452
1453         Z_RecordComposition rc_temp, *rc = 0;
1454         if (sr->smallSetElementSetNames)
1455         {
1456             rc_temp.which = Z_RecordComp_simple;
1457             rc_temp.u.simple = sr->smallSetElementSetNames;
1458             rc = &rc_temp;
1459         }
1460
1461         if (cfg)
1462             err = cfg->check_syntax(odr_encode(),
1463                                     m_default_target,
1464                                     sr->preferredRecordSyntax, rc,
1465                                     &addinfo, &m_stylesheet_schema, &m_schema);
1466         if (err == -1)
1467         {
1468             sr->preferredRecordSyntax =
1469                 yaz_oidval_to_z3950oid(odr_encode(), CLASS_RECSYN, VAL_USMARC);
1470             m_marcxml_flag = 1;
1471         }
1472         else if (err)
1473         {
1474             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1475
1476             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1477             new_apdu->u.searchResponse->records =
1478                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
1479             *new_apdu->u.searchResponse->searchStatus = 0;
1480
1481             send_to_client(new_apdu);
1482
1483             return 0;
1484         }
1485     }
1486     else if (apdu->which == Z_APDU_presentRequest)
1487     {
1488         Z_PresentRequest *pr = apdu->u.presentRequest;
1489         int err = 0;
1490         char *addinfo = 0;
1491         Yaz_ProxyConfig *cfg = check_reconfigure();
1492
1493         if (cfg)
1494             err = cfg->check_syntax(odr_encode(), m_default_target,
1495                                     pr->preferredRecordSyntax,
1496                                     pr->recordComposition,
1497                                     &addinfo, &m_stylesheet_schema, &m_schema);
1498         if (err == -1)
1499         {
1500             pr->preferredRecordSyntax =
1501                 yaz_oidval_to_z3950oid(odr_decode(), CLASS_RECSYN, VAL_USMARC);
1502             m_marcxml_flag = 1;
1503         }
1504         else if (err)
1505         {
1506             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1507
1508             new_apdu->u.presentResponse->referenceId = pr->referenceId;
1509             new_apdu->u.presentResponse->records =
1510                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
1511             *new_apdu->u.presentResponse->presentStatus =
1512                 Z_PresentStatus_failure;
1513
1514             send_to_client(new_apdu);
1515
1516             return 0;
1517         }
1518     }
1519     return apdu;
1520 }
1521
1522 Z_ElementSetNames *Yaz_Proxy::mk_esn_from_schema(ODR o, const char *schema)
1523 {
1524     if (!schema)
1525         return 0;
1526     Z_ElementSetNames *esn = (Z_ElementSetNames *)
1527         odr_malloc(o, sizeof(Z_ElementSetNames));
1528     esn->which = Z_ElementSetNames_generic;
1529     esn->u.generic = odr_strdup(o, schema);
1530     return esn;
1531 }
1532
1533 void Yaz_Proxy::handle_incoming_HTTP(Z_HTTP_Request *hreq)
1534 {
1535
1536     if (m_s2z_odr_init)
1537     {
1538         odr_destroy(m_s2z_odr_init);
1539         m_s2z_odr_init = 0;
1540     }
1541     if (m_s2z_odr_search)
1542     {
1543         odr_destroy(m_s2z_odr_search);
1544         m_s2z_odr_search = 0;
1545     }
1546
1547     m_http_keepalive = 0;
1548     m_http_version = 0;
1549     if (!strcmp(hreq->version, "1.0"))
1550     {
1551         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1552         if (v && !strcmp(v, "Keep-Alive"))
1553             m_http_keepalive = 1;
1554         else
1555             m_http_keepalive = 0;
1556         m_http_version = "1.0";
1557     }
1558     else
1559     {
1560         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1561         if (v && !strcmp(v, "close"))
1562             m_http_keepalive = 0;
1563         else
1564             m_http_keepalive = 1;
1565         m_http_version = "1.1";
1566     }
1567
1568     Z_SRW_PDU *srw_pdu = 0;
1569     Z_SOAP *soap_package = 0;
1570     char *charset = 0;
1571     Z_SRW_diagnostic *diagnostic = 0;
1572     int num_diagnostic = 0;
1573     if (yaz_srw_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
1574                        &charset) == 0
1575         || yaz_sru_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
1576                           &charset, &diagnostic, &num_diagnostic) == 0)
1577     {
1578         m_s2z_odr_init = odr_createmem(ODR_ENCODE);
1579         m_s2z_odr_search = odr_createmem(ODR_ENCODE);
1580         m_soap_ns = odr_strdup(m_s2z_odr_search, soap_package->ns);
1581         m_s2z_init_apdu = 0;
1582         m_s2z_search_apdu = 0;
1583         m_s2z_present_apdu = 0;
1584
1585         m_s2z_stylesheet = 0;
1586
1587         if (srw_pdu->which == Z_SRW_searchRetrieve_request)
1588         {
1589             Z_SRW_searchRetrieveRequest *srw_req = srw_pdu->u.request;
1590
1591             // recordXPath unsupported.
1592             if (srw_req->recordXPath)
1593             {
1594                 yaz_add_srw_diagnostic(odr_decode(),
1595                                        &diagnostic, &num_diagnostic,
1596                                        72, 0);
1597             }
1598             // must have a query
1599             if (!srw_req->query.cql)
1600             {
1601                 yaz_add_srw_diagnostic(odr_decode(),
1602                                        &diagnostic, &num_diagnostic,
1603                                        7, "query");
1604             }
1605             // sort unsupported
1606             if (srw_req->sort_type != Z_SRW_sort_type_none)
1607             {
1608                 yaz_add_srw_diagnostic(odr_decode(),
1609                                        &diagnostic, &num_diagnostic,
1610                                        80, 0);
1611             }
1612             // save stylesheet
1613             if (srw_req->stylesheet)
1614                 m_s2z_stylesheet =
1615                     odr_strdup(m_s2z_odr_init, srw_req->stylesheet);
1616
1617             // set packing for response records ..
1618             if (srw_req->recordPacking &&
1619                 !strcmp(srw_req->recordPacking, "xml"))
1620                 m_s2z_packing = Z_SRW_recordPacking_XML;
1621             else
1622                 m_s2z_packing = Z_SRW_recordPacking_string;
1623
1624             if (num_diagnostic)
1625             {
1626                 Z_SRW_PDU *srw_pdu =
1627                     yaz_srw_get(odr_encode(),
1628                                 Z_SRW_searchRetrieve_response);
1629                 Z_SRW_searchRetrieveResponse *srw_res = srw_pdu->u.response;
1630
1631                 srw_res->diagnostics = diagnostic;
1632                 srw_res->num_diagnostics = num_diagnostic;
1633                 send_srw_response(srw_pdu);
1634                 return;
1635             }
1636
1637             // prepare search PDU
1638             m_s2z_search_apdu = zget_APDU(m_s2z_odr_search,
1639                                           Z_APDU_searchRequest);
1640             Z_SearchRequest *z_searchRequest =
1641                 m_s2z_search_apdu->u.searchRequest;
1642
1643             z_searchRequest->num_databaseNames = 1;
1644             z_searchRequest->databaseNames = (char**)
1645                 odr_malloc(m_s2z_odr_search, sizeof(char *));
1646             z_searchRequest->databaseNames[0] = odr_strdup(m_s2z_odr_search,
1647                                                            srw_req->database);
1648
1649             // query transformation
1650             Z_Query *query = (Z_Query *)
1651                 odr_malloc(m_s2z_odr_search, sizeof(Z_Query));
1652             z_searchRequest->query = query;
1653
1654             if (srw_req->query_type == Z_SRW_query_type_cql)
1655             {
1656                 Z_External *ext = (Z_External *)
1657                     odr_malloc(m_s2z_odr_search, sizeof(*ext));
1658                 ext->direct_reference =
1659                     odr_getoidbystr(m_s2z_odr_search, "1.2.840.10003.16.2");
1660                 ext->indirect_reference = 0;
1661                 ext->descriptor = 0;
1662                 ext->which = Z_External_CQL;
1663                 ext->u.cql = srw_req->query.cql;
1664
1665                 query->which = Z_Query_type_104;
1666                 query->u.type_104 =  ext;
1667             }
1668             else if (srw_req->query_type == Z_SRW_query_type_pqf)
1669             {
1670                 Z_RPNQuery *RPNquery;
1671                 YAZ_PQF_Parser pqf_parser;
1672
1673                 pqf_parser = yaz_pqf_create ();
1674
1675                 RPNquery = yaz_pqf_parse (pqf_parser, m_s2z_odr_search,
1676                                           srw_req->query.pqf);
1677                 if (!RPNquery)
1678                 {
1679                     const char *pqf_msg;
1680                     size_t off;
1681                     int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
1682                     yaz_log(LOG_LOG, "%*s^\n", off+4, "");
1683                     yaz_log(LOG_LOG, "Bad PQF: %s (code %d)\n", pqf_msg, code);
1684
1685                     send_to_srw_client_error(10, 0);
1686                     return;
1687                 }
1688                 query->which = Z_Query_type_1;
1689                 query->u.type_1 =  RPNquery;
1690
1691                 yaz_pqf_destroy (pqf_parser);
1692             }
1693             else
1694             {
1695                 send_to_srw_client_error(7, "query");
1696                 return;
1697             }
1698
1699             // present
1700             m_s2z_present_apdu = 0;
1701             int max = 0;
1702             if (srw_req->maximumRecords)
1703                 max = *srw_req->maximumRecords;
1704             int start = 1;
1705             if (srw_req->startRecord)
1706                 start = *srw_req->startRecord;
1707             if (max > 0)
1708             {
1709                 // Some backend, such as Voyager doesn't honor piggyback
1710                 // So we use present always (0 &&).
1711                 if (0 && start <= 1)  // Z39.50 piggyback
1712                 {
1713                     *z_searchRequest->smallSetUpperBound = max;
1714                     *z_searchRequest->mediumSetPresentNumber = max;
1715                     *z_searchRequest->largeSetLowerBound = 2000000000; // 2e9
1716
1717                     z_searchRequest->preferredRecordSyntax =
1718                         yaz_oidval_to_z3950oid(m_s2z_odr_search, CLASS_RECSYN,
1719                                                VAL_TEXT_XML);
1720                     if (srw_req->recordSchema)
1721                     {
1722                         z_searchRequest->smallSetElementSetNames =
1723                             z_searchRequest->mediumSetElementSetNames =
1724                             mk_esn_from_schema(m_s2z_odr_search,
1725                                                srw_req->recordSchema);
1726                     }
1727                 }
1728                 else   // Z39.50 present
1729                 {
1730                     m_s2z_present_apdu = zget_APDU(m_s2z_odr_search,
1731                                                    Z_APDU_presentRequest);
1732                     Z_PresentRequest *z_presentRequest =
1733                         m_s2z_present_apdu->u.presentRequest;
1734                     *z_presentRequest->resultSetStartPoint = start;
1735                     *z_presentRequest->numberOfRecordsRequested = max;
1736                     z_presentRequest->preferredRecordSyntax =
1737                         yaz_oidval_to_z3950oid(m_s2z_odr_search, CLASS_RECSYN,
1738                                                VAL_TEXT_XML);
1739                     z_presentRequest->recordComposition =
1740                         (Z_RecordComposition *)
1741                         odr_malloc(m_s2z_odr_search,
1742                                    sizeof(Z_RecordComposition));
1743                     if (srw_req->recordSchema)
1744                     {
1745                         z_presentRequest->recordComposition->which =
1746                             Z_RecordComp_simple;
1747                         z_presentRequest->recordComposition->u.simple =
1748                             mk_esn_from_schema(m_s2z_odr_search,
1749                                                srw_req->recordSchema);
1750                     }
1751                 }
1752             }
1753             if (!m_client)
1754             {
1755                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
1756                                             Z_APDU_initRequest);
1757
1758                 // prevent m_initRequest_apdu memory from being grabbed
1759                 // in Yaz_Proxy::handle_incoming_Z_PDU
1760                 m_initRequest_apdu = m_s2z_init_apdu;
1761                 handle_incoming_Z_PDU(m_s2z_init_apdu);
1762                 return;
1763             }
1764             else
1765             {
1766                 handle_incoming_Z_PDU(m_s2z_search_apdu);
1767                 return;
1768             }
1769         }
1770         else if (srw_pdu->which == Z_SRW_explain_request)
1771         {
1772             Z_SRW_explainRequest *srw_req = srw_pdu->u.explain_request;
1773
1774             // save stylesheet
1775             if (srw_req->stylesheet)
1776                 m_s2z_stylesheet =
1777                     odr_strdup(m_s2z_odr_init, srw_req->stylesheet);
1778
1779             if (srw_req->recordPacking &&
1780                 !strcmp(srw_req->recordPacking, "xml"))
1781                 m_s2z_packing = Z_SRW_recordPacking_XML;
1782             else
1783                 m_s2z_packing = Z_SRW_recordPacking_string;
1784
1785             if (num_diagnostic)
1786             {
1787                 send_srw_explain_response(diagnostic, num_diagnostic);
1788                 return;
1789             }
1790
1791             if (!m_client)
1792             {
1793                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
1794                                             Z_APDU_initRequest);
1795
1796                 // prevent m_initRequest_apdu memory from being grabbed
1797                 // in Yaz_Proxy::handle_incoming_Z_PDU
1798                 m_initRequest_apdu = m_s2z_init_apdu;
1799                 handle_incoming_Z_PDU(m_s2z_init_apdu);
1800             }
1801             else
1802                 send_srw_explain_response(0, 0);
1803             return;
1804         }
1805         else if (srw_pdu->which == Z_SRW_scan_request)
1806         {
1807             yaz_add_srw_diagnostic(odr_decode(),
1808                                    &diagnostic, &num_diagnostic,
1809                                    4, "scan");
1810             Z_SRW_PDU *srw_pdu =
1811                 yaz_srw_get(odr_encode(),
1812                             Z_SRW_scan_response);
1813             Z_SRW_scanResponse *srw_res = srw_pdu->u.scan_response;
1814
1815             srw_res->diagnostics = diagnostic;
1816             srw_res->num_diagnostics = num_diagnostic;
1817             send_srw_response(srw_pdu);
1818             return;
1819         }
1820         else
1821         {
1822             send_to_srw_client_error(4, 0);
1823         }
1824     }
1825     int len = 0;
1826     Z_GDU *p = z_get_HTTP_Response(odr_encode(), 400);
1827     send_GDU(p, &len);
1828     timeout(1);
1829 }
1830
1831 void Yaz_Proxy::handle_incoming_Z_PDU(Z_APDU *apdu)
1832 {
1833     if (!m_client && m_invalid_session)
1834     {
1835         m_apdu_invalid_session = apdu;
1836         m_mem_invalid_session = odr_extract_mem(odr_decode());
1837         apdu = m_initRequest_apdu;
1838     }
1839
1840     // Determine our client.
1841     Z_OtherInformation **oi;
1842     get_otherInfoAPDU(apdu, &oi);
1843     m_client = get_client(apdu, get_cookie(oi), get_proxy(oi));
1844     if (!m_client)
1845     {
1846         delete this;
1847         return;
1848     }
1849     m_client->m_server = this;
1850
1851     if (apdu->which == Z_APDU_initRequest)
1852     {
1853         if (apdu->u.initRequest->implementationId)
1854             yaz_log(LOG_LOG, "%simplementationId: %s",
1855                     m_session_str, apdu->u.initRequest->implementationId);
1856         if (apdu->u.initRequest->implementationName)
1857             yaz_log(LOG_LOG, "%simplementationName: %s",
1858                     m_session_str, apdu->u.initRequest->implementationName);
1859         if (apdu->u.initRequest->implementationVersion)
1860             yaz_log(LOG_LOG, "%simplementationVersion: %s",
1861                     m_session_str, apdu->u.initRequest->implementationVersion);
1862         if (m_initRequest_apdu == 0)
1863         {
1864             if (m_initRequest_mem)
1865                 nmem_destroy(m_initRequest_mem);
1866             m_initRequest_apdu = apdu;
1867             m_initRequest_mem = odr_extract_mem(odr_decode());
1868         }
1869         if (m_client->m_init_flag)
1870         {
1871             if (handle_init_response_for_invalid_session(apdu))
1872                 return;
1873             Z_APDU *apdu2 = m_client->m_initResponse;
1874             apdu2->u.initResponse->otherInfo = 0;
1875             if (m_client->m_cookie && *m_client->m_cookie)
1876                 set_otherInformationString(apdu2, VAL_COOKIE, 1,
1877                                            m_client->m_cookie);
1878             apdu2->u.initResponse->referenceId =
1879                 apdu->u.initRequest->referenceId;
1880             send_to_client(apdu2);
1881             return;
1882         }
1883         m_client->m_init_flag = 1;
1884     }
1885     handle_max_record_retrieve(apdu);
1886
1887     if (apdu)
1888         apdu = handle_syntax_validation(apdu);
1889
1890     if (apdu)
1891         apdu = handle_query_transformation(apdu);
1892
1893     if (apdu)
1894         apdu = handle_query_validation(apdu);
1895
1896     if (apdu)
1897         apdu = result_set_optimize(apdu);
1898     if (!apdu)
1899     {
1900         m_client->timeout(m_target_idletime);  // mark it active even
1901         // though we didn't use it
1902         return;
1903     }
1904
1905     // delete other info part from PDU before sending to target
1906     get_otherInfoAPDU(apdu, &oi);
1907     if (oi)
1908         *oi = 0;
1909
1910     if (apdu->which == Z_APDU_presentRequest &&
1911         m_client->m_resultSetStartPoint == 0)
1912     {
1913         Z_PresentRequest *pr = apdu->u.presentRequest;
1914         m_client->m_resultSetStartPoint = *pr->resultSetStartPoint;
1915         m_client->m_cache.copy_presentRequest(apdu->u.presentRequest);
1916     } else {
1917         m_client->m_resultSetStartPoint = 0;
1918     }
1919     if (m_client->send_to_target(apdu) < 0)
1920     {
1921         delete m_client;
1922         m_client = 0;
1923         delete this;
1924     }
1925     else
1926         m_client->m_waiting = 1;
1927 }
1928
1929 void Yaz_Proxy::connectNotify()
1930 {
1931 }
1932
1933 void Yaz_Proxy::shutdown()
1934 {
1935     m_invalid_session = 0;
1936     // only keep if keep_alive flag is set...
1937     if (m_client &&
1938         m_client->m_pdu_recv < m_keepalive_limit_pdu &&
1939         m_client->m_bytes_recv+m_client->m_bytes_sent < m_keepalive_limit_bw &&
1940         m_client->m_waiting == 0)
1941     {
1942         yaz_log(LOG_LOG, "%sShutdown (client to proxy) keepalive %s",
1943                  m_session_str,
1944                  m_client->get_hostname());
1945         yaz_log(LOG_LOG, "%sbw=%d pdu=%d limit-bw=%d limit-pdu=%d",
1946                 m_session_str, m_client->m_pdu_recv,
1947                 m_client->m_bytes_sent + m_client->m_bytes_recv,
1948                 m_keepalive_limit_bw, m_keepalive_limit_pdu);
1949         assert (m_client->m_waiting != 2);
1950         // Tell client (if any) that no server connection is there..
1951         m_client->m_server = 0;
1952         m_invalid_session = 0;
1953     }
1954     else if (m_client)
1955     {
1956         yaz_log (LOG_LOG, "%sShutdown (client to proxy) close %s",
1957                  m_session_str,
1958                  m_client->get_hostname());
1959         assert (m_client->m_waiting != 2);
1960         delete m_client;
1961     }
1962     else if (!m_parent)
1963     {
1964         yaz_log (LOG_LOG, "%sshutdown (client to proxy) bad state",
1965                  m_session_str);
1966         assert (m_parent);
1967     }
1968     else
1969     {
1970         yaz_log (LOG_LOG, "%sShutdown (client to proxy)",
1971                  m_session_str);
1972     }
1973     if (m_parent)
1974         m_parent->pre_init();
1975     delete this;
1976 }
1977
1978 const char *Yaz_ProxyClient::get_session_str()
1979 {
1980     if (!m_server)
1981         return "0 ";
1982     return m_server->get_session_str();
1983 }
1984
1985 void Yaz_ProxyClient::shutdown()
1986 {
1987     yaz_log (LOG_LOG, "%sShutdown (proxy to target) %s", get_session_str(),
1988              get_hostname());
1989     delete m_server;
1990     delete this;
1991 }
1992
1993 void Yaz_Proxy::failNotify()
1994 {
1995     inc_request_no();
1996     yaz_log (LOG_LOG, "%sConnection closed by client",
1997              get_session_str());
1998     shutdown();
1999 }
2000
2001 void Yaz_ProxyClient::failNotify()
2002 {
2003     if (m_server)
2004         m_server->inc_request_no();
2005     yaz_log (LOG_LOG, "%sConnection closed by target %s",
2006              get_session_str(), get_hostname());
2007     shutdown();
2008 }
2009
2010 void Yaz_ProxyClient::connectNotify()
2011 {
2012     const char *s = get_session_str();
2013     const char *h = get_hostname();
2014     yaz_log (LOG_LOG, "%sConnection accepted by %s timeout=%d", s, h,
2015              m_target_idletime);
2016     timeout(m_target_idletime);
2017     if (!m_server)
2018         pre_init_client();
2019 }
2020
2021 IYaz_PDU_Observer *Yaz_ProxyClient::sessionNotify(IYaz_PDU_Observable
2022                                                   *the_PDU_Observable, int fd)
2023 {
2024     return new Yaz_ProxyClient(the_PDU_Observable, 0);
2025 }
2026
2027 Yaz_ProxyClient::~Yaz_ProxyClient()
2028 {
2029     if (m_prev)
2030         *m_prev = m_next;
2031     if (m_next)
2032         m_next->m_prev = m_prev;
2033     m_waiting = 2;     // for debugging purposes only.
2034     odr_destroy(m_init_odr);
2035     delete m_last_query;
2036     xfree (m_last_resultSetId);
2037     xfree (m_cookie);
2038 }
2039
2040 void Yaz_ProxyClient::pre_init_client()
2041 {
2042     Z_APDU *apdu = create_Z_PDU(Z_APDU_initRequest);
2043     Z_InitRequest *req = apdu->u.initRequest;
2044
2045     ODR_MASK_SET(req->options, Z_Options_search);
2046     ODR_MASK_SET(req->options, Z_Options_present);
2047     ODR_MASK_SET(req->options, Z_Options_namedResultSets);
2048     ODR_MASK_SET(req->options, Z_Options_triggerResourceCtrl);
2049     ODR_MASK_SET(req->options, Z_Options_scan);
2050     ODR_MASK_SET(req->options, Z_Options_sort);
2051     ODR_MASK_SET(req->options, Z_Options_extendedServices);
2052     ODR_MASK_SET(req->options, Z_Options_delSet);
2053
2054     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_1);
2055     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_2);
2056     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_3);
2057
2058     if (send_to_target(apdu) < 0)
2059     {
2060         delete this;
2061     }
2062     else
2063     {
2064         m_waiting = 1;
2065         m_init_flag = 1;
2066     }
2067 }
2068
2069 void Yaz_Proxy::pre_init()
2070 {
2071     int i;
2072     const char *name = 0;
2073     const char *zurl_in_use[MAX_ZURL_PLEX];
2074     int limit_bw, limit_pdu, limit_req;
2075     int target_idletime, client_idletime;
2076     int max_clients;
2077     int keepalive_limit_bw, keepalive_limit_pdu;
2078     int pre_init;
2079     const char *cql2rpn = 0;
2080
2081     Yaz_ProxyConfig *cfg = check_reconfigure();
2082
2083     zurl_in_use[0] = 0;
2084
2085     if (m_log_mask & PROXY_LOG_APDU_CLIENT)
2086         set_APDU_yazlog(1);
2087     else
2088         set_APDU_yazlog(0);
2089
2090     for (i = 0; cfg && cfg->get_target_no(i, &name, zurl_in_use,
2091                                           &limit_bw, &limit_pdu, &limit_req,
2092                                           &target_idletime, &client_idletime,
2093                                           &max_clients,
2094                                           &keepalive_limit_bw,
2095                                           &keepalive_limit_pdu,
2096                                           &pre_init,
2097                                           &cql2rpn) ; i++)
2098     {
2099         if (pre_init)
2100         {
2101             int j;
2102             for (j = 0; zurl_in_use[j]; j++)
2103             {
2104                 Yaz_ProxyClient *c;
2105                 int spare = 0;
2106                 int in_use = 0;
2107                 int other = 0;
2108                 for (c = m_clientPool; c; c = c->m_next)
2109                 {
2110                     if (!strcmp(zurl_in_use[j], c->get_hostname()))
2111                     {
2112                         if (c->m_cookie == 0)
2113                         {
2114                             if (c->m_server == 0)
2115                                 spare++;
2116                             else
2117                                 in_use++;
2118                         }
2119                         else
2120                             other++;
2121                     }
2122                 }
2123                 yaz_log(LOG_LOG, "%spre-init %s %s use=%d other=%d spare=%d "
2124                         "preinit=%d",m_session_str,
2125                         name, zurl_in_use[j], in_use, other, spare, pre_init);
2126                 if (spare < pre_init)
2127                 {
2128                     c = new Yaz_ProxyClient(m_PDU_Observable->clone(), this);
2129                     c->m_next = m_clientPool;
2130                     if (c->m_next)
2131                         c->m_next->m_prev = &c->m_next;
2132                     m_clientPool = c;
2133                     c->m_prev = &m_clientPool;
2134
2135                     if (m_log_mask & PROXY_LOG_APDU_SERVER)
2136                         c->set_APDU_yazlog(1);
2137                     else
2138                         c->set_APDU_yazlog(0);
2139
2140                     if (c->client(zurl_in_use[j]))
2141                     {
2142                         timeout(60);
2143                         delete c;
2144                         return;
2145                     }
2146                     c->timeout(30);
2147                     c->m_waiting = 1;
2148                     c->m_target_idletime = target_idletime;
2149                     c->m_seqno = m_seqno++;
2150                 }
2151             }
2152         }
2153     }
2154 }
2155
2156 void Yaz_Proxy::timeoutNotify()
2157 {
2158     if (m_parent)
2159     {
2160         if (m_bw_hold_PDU)
2161         {
2162             timeout(m_client_idletime);
2163             Z_GDU *apdu = m_bw_hold_PDU;
2164             m_bw_hold_PDU = 0;
2165
2166             if (apdu->which == Z_GDU_Z3950)
2167                 handle_incoming_Z_PDU(apdu->u.z3950);
2168             else if (apdu->which == Z_GDU_HTTP_Request)
2169                 handle_incoming_HTTP(apdu->u.HTTP_Request);
2170         }
2171         else
2172         {
2173             inc_request_no();
2174
2175             yaz_log (LOG_LOG, "%sTimeout (client to proxy)", m_session_str);
2176             shutdown();
2177         }
2178     }
2179     else
2180     {
2181         timeout(600);
2182         pre_init();
2183     }
2184 }
2185
2186 void Yaz_ProxyClient::timeoutNotify()
2187 {
2188     if (m_server)
2189         m_server->inc_request_no();
2190
2191     yaz_log (LOG_LOG, "%sTimeout (proxy to target) %s", get_session_str(),
2192              get_hostname());
2193     m_waiting = 1;
2194     m_root->pre_init();
2195     shutdown();
2196 }
2197
2198 Yaz_ProxyClient::Yaz_ProxyClient(IYaz_PDU_Observable *the_PDU_Observable,
2199                                  Yaz_Proxy *parent) :
2200     Yaz_Z_Assoc (the_PDU_Observable)
2201 {
2202     m_cookie = 0;
2203     m_next = 0;
2204     m_prev = 0;
2205     m_init_flag = 0;
2206     m_last_query = 0;
2207     m_last_resultSetId = 0;
2208     m_last_resultCount = 0;
2209     m_last_ok = 0;
2210     m_sr_transform = 0;
2211     m_waiting = 0;
2212     m_init_odr = odr_createmem (ODR_DECODE);
2213     m_initResponse = 0;
2214     m_resultSetStartPoint = 0;
2215     m_bytes_sent = m_bytes_recv = 0;
2216     m_pdu_recv = 0;
2217     m_server = 0;
2218     m_seqno = 0;
2219     m_target_idletime = 600;
2220     m_root = parent;
2221 }
2222
2223 const char *Yaz_Proxy::option(const char *name, const char *value)
2224 {
2225     if (!strcmp (name, "optimize")) {
2226         if (value) {
2227             xfree (m_optimize);
2228             m_optimize = xstrdup (value);
2229         }
2230         return m_optimize;
2231     }
2232     return 0;
2233 }
2234
2235 void Yaz_ProxyClient::recv_HTTP_response(Z_HTTP_Response *apdu, int len)
2236 {
2237
2238 }
2239
2240 void Yaz_ProxyClient::recv_GDU(Z_GDU *apdu, int len)
2241 {
2242     if (apdu->which == Z_GDU_Z3950)
2243         recv_Z_PDU(apdu->u.z3950, len);
2244     else if (apdu->which == Z_GDU_HTTP_Response)
2245         recv_HTTP_response(apdu->u.HTTP_Response, len);
2246     else
2247         shutdown();
2248 }
2249
2250 int Yaz_Proxy::handle_init_response_for_invalid_session(Z_APDU *apdu)
2251 {
2252     if (!m_invalid_session)
2253         return 0;
2254     m_invalid_session = 0;
2255     handle_incoming_Z_PDU(m_apdu_invalid_session);
2256     assert (m_mem_invalid_session);
2257     nmem_destroy(m_mem_invalid_session);
2258     m_mem_invalid_session = 0;
2259     return 1;
2260 }
2261
2262 void Yaz_ProxyClient::recv_Z_PDU(Z_APDU *apdu, int len)
2263 {
2264     m_bytes_recv += len;
2265     m_pdu_recv++;
2266     m_waiting = 0;
2267     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
2268         yaz_log (LOG_LOG, "%sReceiving %s from %s %d bytes", get_session_str(),
2269                  apdu_name(apdu), get_hostname(), len);
2270     if (apdu->which == Z_APDU_initResponse)
2271     {
2272         if (!m_server)  // if this is a pre init session , check for more
2273             m_root->pre_init();
2274         NMEM nmem = odr_extract_mem (odr_decode());
2275         odr_reset (m_init_odr);
2276         nmem_transfer (m_init_odr->mem, nmem);
2277         m_initResponse = apdu;
2278
2279         Z_InitResponse *ir = apdu->u.initResponse;
2280         char *im0 = ir->implementationName;
2281
2282         char *im1 = (char*)
2283             odr_malloc(m_init_odr, 20 + (im0 ? strlen(im0) : 0));
2284         *im1 = '\0';
2285         if (im0)
2286         {
2287             strcat(im1, im0);
2288             strcat(im1, " ");
2289         }
2290         strcat(im1, "(YAZ Proxy)");
2291         ir->implementationName = im1;
2292
2293         nmem_destroy (nmem);
2294
2295         if (m_server && m_server->handle_init_response_for_invalid_session(apdu))
2296             return;
2297     }
2298     if (apdu->which == Z_APDU_searchResponse)
2299     {
2300         Z_SearchResponse *sr = apdu->u.searchResponse;
2301         m_last_resultCount = *sr->resultCount;
2302         int status = *sr->searchStatus;
2303         if (status && (!sr->records || sr->records->which == Z_Records_DBOSD))
2304         {
2305             m_last_ok = 1;
2306
2307             if (sr->records && sr->records->which == Z_Records_DBOSD)
2308             {
2309                 m_cache.add(odr_decode(),
2310                             sr->records->u.databaseOrSurDiagnostics, 1,
2311                             *sr->resultCount);
2312             }
2313         }
2314     }
2315     if (apdu->which == Z_APDU_presentResponse)
2316     {
2317         Z_PresentResponse *pr = apdu->u.presentResponse;
2318         if (m_sr_transform)
2319         {
2320             m_sr_transform = 0;
2321             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
2322             Z_SearchResponse *sr = new_apdu->u.searchResponse;
2323             sr->referenceId = pr->referenceId;
2324             *sr->resultCount = m_last_resultCount;
2325             sr->records = pr->records;
2326             sr->nextResultSetPosition = pr->nextResultSetPosition;
2327             sr->numberOfRecordsReturned = pr->numberOfRecordsReturned;
2328             apdu = new_apdu;
2329         }
2330         if (pr->records &&
2331             pr->records->which == Z_Records_DBOSD && m_resultSetStartPoint)
2332         {
2333             m_cache.add(odr_decode(),
2334                         pr->records->u.databaseOrSurDiagnostics,
2335                         m_resultSetStartPoint, -1);
2336             m_resultSetStartPoint = 0;
2337         }
2338     }
2339     if (m_cookie)
2340         set_otherInformationString (apdu, VAL_COOKIE, 1, m_cookie);
2341     if (m_server)
2342     {
2343         m_server->send_to_client(apdu);
2344     }
2345     if (apdu->which == Z_APDU_close)
2346     {
2347         shutdown();
2348     }
2349 }
2350
2351 int Yaz_Proxy::server(const char *addr)
2352 {
2353     int r = Yaz_Z_Assoc::server(addr);
2354     if (!r)
2355     {
2356         yaz_log(LOG_LOG, "%sStarted proxy " VERSION " on %s", m_session_str, addr);
2357         timeout(1);
2358     }
2359     return r;
2360 }
2361