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 1.82 2004-01-07 21:29:26 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                 xmlFreeDoc(doc);
 615                 xmlFreeDoc(res);
 616             }
 617         }
 618     }
 619     xsltFreeStylesheet(xsp);
 620 }
 621
 622 void Yaz_Proxy::convert_to_marcxml(Z_NamePlusRecordList *p)
 623 {
 624     int i;
 625
 626     yaz_marc_t mt = yaz_marc_create();
 627     yaz_marc_xml(mt, YAZ_MARC_MARCXML);
 628     for (i = 0; i < p->num_records; i++)
 629     {
 630         Z_NamePlusRecord *npr = p->records[i];
 631         if (npr->which == Z_NamePlusRecord_databaseRecord)
 632         {
 633             Z_External *r = npr->u.databaseRecord;
 634             if (r->which == Z_External_octet)
 635             {
 636                 int rlen;
 637                 char *result;
 638                 if (yaz_marc_decode_buf(mt, (char*) r->u.octet_aligned->buf,
 639                                         r->u.octet_aligned->len,
 640                                         &result, &rlen))
 641                 {
 642                     yaz_iconv_t cd = yaz_iconv_open("UTF-8", "MARC-8");
 643                     WRBUF wrbuf = wrbuf_alloc();
 644
 645                     char outbuf[120];
 646                     size_t inbytesleft = rlen;
 647                     const char *inp = result;
 648                     while (cd && inbytesleft)
 649                     {
 650                         size_t outbytesleft = sizeof(outbuf);
 651                         char *outp = outbuf;
 652                         size_t r;
 653
 654                         r = yaz_iconv (cd, (char**) &inp,
 655                                        &inbytesleft,
 656                                        &outp, &outbytesleft);
 657                         if (r == (size_t) (-1))
 658                         {
 659                             int e = yaz_iconv_error(cd);
 660                             if (e != YAZ_ICONV_E2BIG)
 661                             {
 662                                 yaz_log(LOG_WARN, "conversion failure");
 663                                 break;
 664                             }
 665                         }
 666                         wrbuf_write(wrbuf, outbuf, outp - outbuf);
 667                     }
 668                     if (cd)
 669                         yaz_iconv_close(cd);
 670
 671                     npr->u.databaseRecord = z_ext_record(odr_encode(),
 672                                                          VAL_TEXT_XML,
 673                                                          wrbuf_buf(wrbuf),
 674                                                          wrbuf_len(wrbuf));
 675                     wrbuf_free(wrbuf, 1);
 676                 }
 677             }
 678         }
 679     }
 680     yaz_marc_destroy(mt);
 681 }
 682
 683 void Yaz_Proxy::logtime()
 684 {
 685     if (m_time_tv.tv_sec)
 686     {
 687         struct timeval tv;
 688         gettimeofday(&tv, 0);
 689         long diff = (tv.tv_sec - m_time_tv.tv_sec)*1000000 +
 690             (tv.tv_usec - m_time_tv.tv_usec);
 691         if (diff >= 0)
 692             yaz_log(LOG_LOG, "%sElapsed %ld.%03ld", m_session_str,
 693                     diff/1000000, (diff/1000)%1000);
 694     }
 695     m_time_tv.tv_sec = 0;
 696     m_time_tv.tv_usec = 0;
 697 }
 698
 699 int Yaz_Proxy::send_http_response(int code)
 700 {
 701     ODR o = odr_encode();
 702     Z_GDU *gdu = z_get_HTTP_Response(o, code);
 703     Z_HTTP_Response *hres = gdu->u.HTTP_Response;
 704     if (m_http_version)
 705         hres->version = odr_strdup(o, m_http_version);
 706     m_http_keepalive = 0;
 707     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
 708     {
 709         yaz_log (LOG_LOG, "%sSending %s to client", m_session_str,
 710                  gdu_name(gdu));
 711     }
 712     int len;
 713     int r = send_GDU(gdu, &len);
 714     logtime();
 715     return r;
 716 }
 717
 718 int Yaz_Proxy::send_srw_response(Z_SRW_PDU *srw_pdu)
 719 {
 720     ODR o = odr_encode();
 721     const char *ctype = "text/xml";
 722     Z_GDU *gdu = z_get_HTTP_Response(o, 200);
 723     Z_HTTP_Response *hres = gdu->u.HTTP_Response;
 724     if (m_http_version)
 725         hres->version = odr_strdup(o, m_http_version);
 726     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
 727     if (m_http_keepalive)
 728         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
 729
 730     static Z_SOAP_Handler soap_handlers[2] = {
 731 #if HAVE_XSLT
 732         {"http://www.loc.gov/zing/srw/", 0,
 733          (Z_SOAP_fun) yaz_srw_codec},
 734 #endif
 735         {0, 0, 0}
 736     };
 737
 738     Z_SOAP *soap_package = (Z_SOAP*) odr_malloc(o, sizeof(Z_SOAP));
 739     soap_package->which = Z_SOAP_generic;
 740     soap_package->u.generic =
 741         (Z_SOAP_Generic *) odr_malloc(o,  sizeof(*soap_package->u.generic));
 742     soap_package->u.generic->no = 0;
 743     soap_package->u.generic->ns = soap_handlers[0].ns;
 744     soap_package->u.generic->p = (void *) srw_pdu;
 745     soap_package->ns = m_soap_ns;
 746     z_soap_codec_enc_xsl(o, &soap_package,
 747                          &hres->content_buf, &hres->content_len,
 748                          soap_handlers, 0, m_s2z_stylesheet);
 749     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
 750     {
 751         yaz_log (LOG_LOG, "%sSending %s to client", m_session_str,
 752                  gdu_name(gdu));
 753     }
 754     int len;
 755     int r = send_GDU(gdu, &len);
 756     logtime();
 757     return r;
 758 }
 759
 760 int Yaz_Proxy::send_to_srw_client_error(int srw_error)
 761 {
 762     ODR o = odr_encode();
 763     Z_SRW_PDU *srw_pdu = yaz_srw_get(o, Z_SRW_searchRetrieve_response);
 764     Z_SRW_searchRetrieveResponse *srw_res = srw_pdu->u.response;
 765
 766     srw_res->num_diagnostics = 1;
 767     srw_res->diagnostics = (Z_SRW_diagnostic *)
 768         odr_malloc(o, sizeof(*srw_res->diagnostics));
 769     srw_res->diagnostics[0].code =  odr_intdup(o, srw_error);
 770     srw_res->diagnostics[0].details = 0;
 771     return send_srw_response(srw_pdu);
 772 }
 773
 774 int Yaz_Proxy::z_to_srw_diag(ODR o, Z_SRW_searchRetrieveResponse *srw_res,
 775                              Z_DefaultDiagFormat *ddf)
 776 {
 777     int bib1_code = *ddf->condition;
 778     if (bib1_code == 109)
 779         return 404;
 780     srw_res->num_diagnostics = 1;
 781     srw_res->diagnostics = (Z_SRW_diagnostic *)
 782         odr_malloc(o, sizeof(*srw_res->diagnostics));
 783     srw_res->diagnostics[0].code =
 784         odr_intdup(o, yaz_diag_bib1_to_srw(*ddf->condition));
 785     srw_res->diagnostics[0].details = ddf->u.v2Addinfo;
 786     return 0;
 787 }
 788
 789 int Yaz_Proxy::send_to_srw_client_ok(int hits, Z_Records *records, int start)
 790 {
 791     ODR o = odr_encode();
 792     Z_SRW_PDU *srw_pdu = yaz_srw_get(o, Z_SRW_searchRetrieve_response);
 793     Z_SRW_searchRetrieveResponse *srw_res = srw_pdu->u.response;
 794
 795     srw_res->numberOfRecords = odr_intdup (o, hits);
 796     if (records && records->which == Z_Records_DBOSD)
 797     {
 798         srw_res->num_records =
 799             records->u.databaseOrSurDiagnostics->num_records;
 800         int i;
 801         srw_res->records = (Z_SRW_record *)
 802             odr_malloc(o, srw_res->num_records * sizeof(Z_SRW_record));
 803         for (i = 0; i < srw_res->num_records; i++)
 804         {
 805             Z_NamePlusRecord *npr = records->u.databaseOrSurDiagnostics->records[i];
 806             if (npr->which != Z_NamePlusRecord_databaseRecord)
 807             {
 808                 srw_res->records[i].recordSchema = "diagnostic";
 809                 srw_res->records[i].recordPacking = m_s2z_packing;
 810                 srw_res->records[i].recordData_buf = "67";
 811                 srw_res->records[i].recordData_len = 2;
 812                 srw_res->records[i].recordPosition = odr_intdup(o, i+start);
 813                 continue;
 814             }
 815             Z_External *r = npr->u.databaseRecord;
 816             oident *ent = oid_getentbyoid(r->direct_reference);
 817             if (r->which == Z_External_octet && ent->value == VAL_TEXT_XML)
 818             {
 819                 srw_res->records[i].recordSchema = m_schema;
 820                 srw_res->records[i].recordPacking = m_s2z_packing;
 821                 srw_res->records[i].recordData_buf = (char*)
 822                     r->u.octet_aligned->buf;
 823                 srw_res->records[i].recordData_len = r->u.octet_aligned->len;
 824                 srw_res->records[i].recordPosition = odr_intdup(o, i+start);
 825             }
 826             else
 827             {
 828                 srw_res->records[i].recordSchema = "diagnostic";
 829                 srw_res->records[i].recordPacking = m_s2z_packing;
 830                 srw_res->records[i].recordData_buf = "67";
 831                 srw_res->records[i].recordData_len = 2;
 832                 srw_res->records[i].recordPosition = odr_intdup(o, i+start);
 833             }
 834         }
 835     }
 836     if (records && records->which == Z_Records_NSD)
 837     {
 838         int http_code;
 839         http_code = z_to_srw_diag(odr_encode(), srw_res,
 840                                    records->u.nonSurrogateDiagnostic);
 841         if (http_code)
 842             return send_http_response(http_code);
 843     }
 844     return send_srw_response(srw_pdu);
 845
 846 }
 847
 848 int Yaz_Proxy::send_srw_explain()
 849 {
 850     Z_SRW_PDU *res = yaz_srw_get(odr_encode(), Z_SRW_explain_response);
 851     Z_SRW_explainResponse *er = res->u.explain_response;
 852
 853     Yaz_ProxyConfig *cfg = check_reconfigure();
 854     if (cfg)
 855     {
 856         int len;
 857         assert (m_proxyTarget);
 858         char *b = cfg->get_explain(odr_encode(), 0 /* target */,
 859                                    0 /* db */, &len);
 860         if (b)
 861         {
 862             er->record.recordData_buf = b;
 863             er->record.recordData_len = len;
 864             er->record.recordPacking = m_s2z_packing;
 865         }
 866     }
 867     return send_srw_response(res);
 868 }
 869
 870 int Yaz_Proxy::send_PDU_convert(Z_APDU *apdu, int *len)
 871 {
 872     if (m_http_version)
 873     {
 874         if (apdu->which == Z_APDU_initResponse)
 875         {
 876             Z_InitResponse *res = apdu->u.initResponse;
 877             if (*res->result == 0)
 878             {
 879                 send_to_srw_client_error(3);
 880             }
 881             else if (!m_s2z_search_apdu)
 882             {
 883                 send_srw_explain();
 884             }
 885             else
 886             {
 887                 handle_incoming_Z_PDU(m_s2z_search_apdu);
 888             }
 889         }
 890         else if (m_s2z_search_apdu && apdu->which == Z_APDU_searchResponse)
 891         {
 892             m_s2z_search_apdu = 0;
 893             Z_SearchResponse *res = apdu->u.searchResponse;
 894             m_s2z_hit_count = *res->resultCount;
 895             if (res->records && res->records->which == Z_Records_NSD)
 896             {
 897                 send_to_srw_client_ok(0, res->records, 1);
 898             }
 899             else if (m_s2z_present_apdu)
 900             {
 901                 handle_incoming_Z_PDU(m_s2z_present_apdu);
 902             }
 903             else
 904             {
 905                 send_to_srw_client_ok(m_s2z_hit_count, res->records, 1);
 906             }
 907         }
 908         else if (m_s2z_present_apdu && apdu->which == Z_APDU_presentResponse)
 909         {
 910             int start =
 911                 *m_s2z_present_apdu->u.presentRequest->resultSetStartPoint;
 912
 913             m_s2z_present_apdu = 0;
 914             Z_PresentResponse *res = apdu->u.presentResponse;
 915             send_to_srw_client_ok(m_s2z_hit_count, res->records, start);
 916         }
 917     }
 918     else
 919     {
 920         if (m_log_mask & PROXY_LOG_REQ_CLIENT)
 921             yaz_log (LOG_LOG, "%sSending %s to client", m_session_str,
 922                      apdu_name(apdu));
 923         int r = send_Z_PDU(apdu, len);
 924         logtime();
 925         return r;
 926     }
 927     return 0;
 928 }
 929
 930 int Yaz_Proxy::send_to_client(Z_APDU *apdu)
 931 {
 932     int len = 0;
 933     int kill_session = 0;
 934     if (apdu->which == Z_APDU_searchResponse)
 935     {
 936         Z_SearchResponse *sr = apdu->u.searchResponse;
 937         Z_Records *p = sr->records;
 938         if (p && p->which == Z_Records_NSD)
 939         {
 940             Z_DiagRec dr, *dr_p = &dr;
 941             dr.which = Z_DiagRec_defaultFormat;
 942             dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
 943
 944             *sr->searchStatus = 0;
 945             display_diagrecs(&dr_p, 1);
 946         }
 947         else
 948         {
 949             if (p && p->which == Z_Records_DBOSD)
 950             {
 951                 if (m_marcxml_flag)
 952                     convert_to_marcxml(p->u.databaseOrSurDiagnostics);
 953                 convert_xsl(p->u.databaseOrSurDiagnostics);
 954             }
 955             if (sr->resultCount)
 956             {
 957                 yaz_log(LOG_LOG, "%s%d hits", m_session_str,
 958                         *sr->resultCount);
 959                 if (*sr->resultCount < 0)
 960                 {
 961                     m_invalid_session = 1;
 962                     kill_session = 1;
 963
 964                     *sr->searchStatus = 0;
 965                     sr->records =
 966                         create_nonSurrogateDiagnostics(odr_encode(), 2, 0);
 967                     *sr->resultCount = 0;
 968                 }
 969             }
 970         }
 971     }
 972     else if (apdu->which == Z_APDU_presentResponse)
 973     {
 974         Z_PresentResponse *sr = apdu->u.presentResponse;
 975         Z_Records *p = sr->records;
 976         if (p && p->which == Z_Records_NSD)
 977         {
 978             Z_DiagRec dr, *dr_p = &dr;
 979             dr.which = Z_DiagRec_defaultFormat;
 980             dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
 981             if (*sr->presentStatus == Z_PresentStatus_success)
 982                 *sr->presentStatus = Z_PresentStatus_failure;
 983             display_diagrecs(&dr_p, 1);
 984         }
 985         if (p && p->which == Z_Records_DBOSD)
 986         {
 987             if (m_marcxml_flag)
 988                 convert_to_marcxml(p->u.databaseOrSurDiagnostics);
 989             convert_xsl(p->u.databaseOrSurDiagnostics);
 990         }
 991     }
 992     int r = send_PDU_convert(apdu, &len);
 993     if (r)
 994         return r;
 995     m_bytes_sent += len;
 996     m_bw_stat.add_bytes(len);
 997     if (kill_session)
 998     {
 999         delete m_client;
1000         m_client = 0;
1001         m_parent->pre_init();
1002     }
1003     if (m_http_version)
1004     {
1005         if (!m_http_keepalive)
1006         {
1007 #if 1
1008             timeout(1);
1009 #else
1010             shutdown();
1011             return -1;
1012 #endif
1013         }
1014     }
1015     return r;
1016 }
1017
1018 int Yaz_ProxyClient::send_to_target(Z_APDU *apdu)
1019 {
1020     int len = 0;
1021     const char *apdu_name_tmp = apdu_name(apdu);
1022     int r = send_Z_PDU(apdu, &len);
1023     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
1024         yaz_log (LOG_LOG, "%sSending %s to %s %d bytes",
1025                  get_session_str(),
1026                  apdu_name_tmp, get_hostname(), len);
1027     m_bytes_sent += len;
1028     return r;
1029 }
1030
1031 Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
1032 {
1033     if (apdu->which == Z_APDU_presentRequest)
1034     {
1035         Z_PresentRequest *pr = apdu->u.presentRequest;
1036         int toget = *pr->numberOfRecordsRequested;
1037         int start = *pr->resultSetStartPoint;
1038
1039         yaz_log(LOG_LOG, "%sPresent %s %d+%d", m_session_str,
1040                 pr->resultSetId, start, toget);
1041
1042         if (*m_parent->m_optimize == '0')
1043             return apdu;
1044
1045         if (!m_client->m_last_resultSetId)
1046         {
1047             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1048             new_apdu->u.presentResponse->records =
1049                 create_nonSurrogateDiagnostics(odr_encode(), 30,
1050                                                pr->resultSetId);
1051             send_to_client(new_apdu);
1052             return 0;
1053         }
1054         if (!strcmp(m_client->m_last_resultSetId, pr->resultSetId))
1055         {
1056             if (start+toget-1 > m_client->m_last_resultCount)
1057             {
1058                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1059                 new_apdu->u.presentResponse->records =
1060                     create_nonSurrogateDiagnostics(odr_encode(), 13, 0);
1061                 send_to_client(new_apdu);
1062                 return 0;
1063             }
1064             Z_NamePlusRecordList *npr;
1065             if (m_client->m_cache.lookup (odr_encode(), &npr, start, toget,
1066                                           pr->preferredRecordSyntax,
1067                                           pr->recordComposition))
1068             {
1069                 yaz_log (LOG_LOG, "%sReturned cached records for present request",
1070                          m_session_str);
1071                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1072                 new_apdu->u.presentResponse->referenceId = pr->referenceId;
1073
1074                 new_apdu->u.presentResponse->numberOfRecordsReturned
1075                     = odr_intdup(odr_encode(), toget);
1076
1077                 new_apdu->u.presentResponse->records = (Z_Records*)
1078                     odr_malloc(odr_encode(), sizeof(Z_Records));
1079                 new_apdu->u.presentResponse->records->which = Z_Records_DBOSD;
1080                 new_apdu->u.presentResponse->records->u.databaseOrSurDiagnostics = npr;
1081                 new_apdu->u.presentResponse->nextResultSetPosition =
1082                     odr_intdup(odr_encode(), start+toget);
1083
1084                 send_to_client(new_apdu);
1085                 return 0;
1086             }
1087         }
1088     }
1089
1090     if (apdu->which != Z_APDU_searchRequest)
1091         return apdu;
1092     Z_SearchRequest *sr = apdu->u.searchRequest;
1093     Yaz_Z_Query *this_query = new Yaz_Z_Query;
1094     Yaz_Z_Databases this_databases;
1095
1096     this_databases.set(sr->num_databaseNames, (const char **)
1097                        sr->databaseNames);
1098
1099     this_query->set_Z_Query(sr->query);
1100
1101     char query_str[120];
1102     this_query->print(query_str, sizeof(query_str)-1);
1103     yaz_log(LOG_LOG, "%sSearch %s", m_session_str, query_str);
1104
1105     if (*m_parent->m_optimize != '0' &&
1106         m_client->m_last_ok && m_client->m_last_query &&
1107         m_client->m_last_query->match(this_query) &&
1108         !strcmp(m_client->m_last_resultSetId, sr->resultSetName) &&
1109         m_client->m_last_databases.match(this_databases))
1110     {
1111         delete this_query;
1112         if (m_client->m_last_resultCount > *sr->smallSetUpperBound &&
1113             m_client->m_last_resultCount < *sr->largeSetLowerBound)
1114         {
1115             Z_NamePlusRecordList *npr;
1116             int toget = *sr->mediumSetPresentNumber;
1117             Z_RecordComposition *comp = 0;
1118
1119             if (toget > m_client->m_last_resultCount)
1120                 toget = m_client->m_last_resultCount;
1121
1122             if (sr->mediumSetElementSetNames)
1123             {
1124                 comp = (Z_RecordComposition *)
1125                     odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
1126                 comp->which = Z_RecordComp_simple;
1127                 comp->u.simple = sr->mediumSetElementSetNames;
1128             }
1129
1130             if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
1131                                           sr->preferredRecordSyntax, comp))
1132             {
1133                 yaz_log (LOG_LOG, "%sReturned cached records for medium set",
1134                          m_session_str);
1135                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1136                 new_apdu->u.searchResponse->referenceId = sr->referenceId;
1137                 new_apdu->u.searchResponse->resultCount =
1138                     &m_client->m_last_resultCount;
1139
1140                 new_apdu->u.searchResponse->numberOfRecordsReturned
1141                     = odr_intdup(odr_encode(), toget);
1142
1143                 new_apdu->u.searchResponse->presentStatus =
1144                     odr_intdup(odr_encode(), Z_PresentStatus_success);
1145                 new_apdu->u.searchResponse->records = (Z_Records*)
1146                     odr_malloc(odr_encode(), sizeof(Z_Records));
1147                 new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
1148                 new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
1149                 new_apdu->u.searchResponse->nextResultSetPosition =
1150                     odr_intdup(odr_encode(), toget+1);
1151                 send_to_client(new_apdu);
1152                 return 0;
1153             }
1154             else
1155             {
1156                 // medium Set
1157                 // send present request (medium size)
1158                 yaz_log (LOG_LOG, "%sOptimizing search for medium set",
1159                          m_session_str);
1160
1161                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
1162                 Z_PresentRequest *pr = new_apdu->u.presentRequest;
1163                 pr->referenceId = sr->referenceId;
1164                 pr->resultSetId = sr->resultSetName;
1165                 pr->preferredRecordSyntax = sr->preferredRecordSyntax;
1166                 *pr->numberOfRecordsRequested = toget;
1167                 pr->recordComposition = comp;
1168                 m_client->m_sr_transform = 1;
1169                 return new_apdu;
1170             }
1171         }
1172         else if (m_client->m_last_resultCount >= *sr->largeSetLowerBound ||
1173             m_client->m_last_resultCount <= 0)
1174         {
1175             // large set. Return pseudo-search response immediately
1176             yaz_log (LOG_LOG, "%sOptimizing search for large set",
1177                      m_session_str);
1178             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1179             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1180             new_apdu->u.searchResponse->resultCount =
1181                 &m_client->m_last_resultCount;
1182             send_to_client(new_apdu);
1183             return 0;
1184         }
1185         else
1186         {
1187             Z_NamePlusRecordList *npr;
1188             int toget = m_client->m_last_resultCount;
1189             Z_RecordComposition *comp = 0;
1190             // small set
1191             // send a present request (small set)
1192
1193             if (sr->smallSetElementSetNames)
1194             {
1195                 comp = (Z_RecordComposition *)
1196                     odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
1197                 comp->which = Z_RecordComp_simple;
1198                 comp->u.simple = sr->smallSetElementSetNames;
1199             }
1200
1201             if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
1202                                           sr->preferredRecordSyntax, comp))
1203             {
1204                 yaz_log (LOG_LOG, "%sReturned cached records for small set",
1205                          m_session_str);
1206                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1207                 new_apdu->u.searchResponse->referenceId = sr->referenceId;
1208                 new_apdu->u.searchResponse->resultCount =
1209                     &m_client->m_last_resultCount;
1210
1211                 new_apdu->u.searchResponse->numberOfRecordsReturned
1212                     = odr_intdup(odr_encode(), toget);
1213
1214                 new_apdu->u.searchResponse->presentStatus =
1215                     odr_intdup(odr_encode(), Z_PresentStatus_success);
1216                 new_apdu->u.searchResponse->records = (Z_Records*)
1217                     odr_malloc(odr_encode(), sizeof(Z_Records));
1218                 new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
1219                 new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
1220                 new_apdu->u.searchResponse->nextResultSetPosition =
1221                     odr_intdup(odr_encode(), toget+1);
1222                 send_to_client(new_apdu);
1223                 return 0;
1224             }
1225             else
1226             {
1227                 yaz_log (LOG_LOG, "%sOptimizing search for small set",
1228                          m_session_str);
1229                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
1230                 Z_PresentRequest *pr = new_apdu->u.presentRequest;
1231                 pr->referenceId = sr->referenceId;
1232                 pr->resultSetId = sr->resultSetName;
1233                 pr->preferredRecordSyntax = sr->preferredRecordSyntax;
1234                 *pr->numberOfRecordsRequested = toget;
1235                 pr->recordComposition = comp;
1236                 m_client->m_sr_transform = 1;
1237                 return new_apdu;
1238             }
1239         }
1240     }
1241     else  // query doesn't match
1242     {
1243         delete m_client->m_last_query;
1244         m_client->m_last_query = this_query;
1245         m_client->m_last_ok = 0;
1246         m_client->m_cache.clear();
1247         m_client->m_resultSetStartPoint = 0;
1248
1249         xfree (m_client->m_last_resultSetId);
1250         m_client->m_last_resultSetId = xstrdup (sr->resultSetName);
1251
1252         m_client->m_last_databases.set(sr->num_databaseNames,
1253                                        (const char **) sr->databaseNames);
1254     }
1255     return apdu;
1256 }
1257
1258
1259 void Yaz_Proxy::inc_request_no()
1260 {
1261     char *cp = strchr(m_session_str, ' ');
1262     m_request_no++;
1263     if (cp)
1264         sprintf(cp+1, "%d ", m_request_no);
1265 }
1266
1267 void Yaz_Proxy::recv_GDU(Z_GDU *apdu, int len)
1268 {
1269     inc_request_no();
1270
1271     m_bytes_recv += len;
1272
1273     if (m_log_mask & PROXY_LOG_APDU_CLIENT)
1274         yaz_log (LOG_DEBUG, "%sReceiving %s from client %d bytes",
1275                  m_session_str, gdu_name(apdu), len);
1276
1277     if (m_bw_hold_PDU)     // double incoming PDU. shutdown now.
1278         shutdown();
1279
1280     m_bw_stat.add_bytes(len);
1281     m_pdu_stat.add_bytes(1);
1282
1283     gettimeofday(&m_time_tv, 0);
1284
1285     int bw_total = m_bw_stat.get_total();
1286     int pdu_total = m_pdu_stat.get_total();
1287
1288     int reduce = 0;
1289     if (m_bw_max)
1290     {
1291         if (bw_total > m_bw_max)
1292         {
1293             reduce = (bw_total/m_bw_max);
1294         }
1295     }
1296     if (m_pdu_max)
1297     {
1298         if (pdu_total > m_pdu_max)
1299         {
1300             int nreduce = (m_pdu_max >= 60) ? 1 : 60/m_pdu_max;
1301             reduce = (reduce > nreduce) ? reduce : nreduce;
1302         }
1303     }
1304     if (reduce)
1305     {
1306         yaz_log(LOG_LOG, "%sdelay=%d bw=%d pdu=%d limit-bw=%d limit-pdu=%d",
1307                 m_session_str, reduce, bw_total, pdu_total,
1308                 m_bw_max, m_pdu_max);
1309
1310         m_bw_hold_PDU = apdu;  // save PDU and signal "on hold"
1311         timeout(reduce);       // call us reduce seconds later
1312     }
1313     else if (apdu->which == Z_GDU_Z3950)
1314         handle_incoming_Z_PDU(apdu->u.z3950);
1315     else if (apdu->which == Z_GDU_HTTP_Request)
1316         handle_incoming_HTTP(apdu->u.HTTP_Request);
1317 }
1318
1319 void Yaz_Proxy::handle_max_record_retrieve(Z_APDU *apdu)
1320 {
1321     if (m_max_record_retrieve)
1322     {
1323         if (apdu->which == Z_APDU_presentRequest)
1324         {
1325             Z_PresentRequest *pr = apdu->u.presentRequest;
1326             if (pr->numberOfRecordsRequested &&
1327                 *pr->numberOfRecordsRequested > m_max_record_retrieve)
1328                 *pr->numberOfRecordsRequested = m_max_record_retrieve;
1329         }
1330     }
1331 }
1332
1333 Z_Records *Yaz_Proxy::create_nonSurrogateDiagnostics(ODR odr,
1334                                                      int error,
1335                                                      const char *addinfo)
1336 {
1337     Z_Records *rec = (Z_Records *)
1338         odr_malloc (odr, sizeof(*rec));
1339     int *err = (int *)
1340         odr_malloc (odr, sizeof(*err));
1341     Z_DiagRec *drec = (Z_DiagRec *)
1342         odr_malloc (odr, sizeof(*drec));
1343     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
1344         odr_malloc (odr, sizeof(*dr));
1345     *err = error;
1346     rec->which = Z_Records_NSD;
1347     rec->u.nonSurrogateDiagnostic = dr;
1348     dr->diagnosticSetId =
1349         yaz_oidval_to_z3950oid (odr, CLASS_DIAGSET, VAL_BIB1);
1350     dr->condition = err;
1351     dr->which = Z_DefaultDiagFormat_v2Addinfo;
1352     dr->u.v2Addinfo = odr_strdup (odr, addinfo ? addinfo : "");
1353     return rec;
1354 }
1355
1356 Z_APDU *Yaz_Proxy::handle_query_transformation(Z_APDU *apdu)
1357 {
1358     if (apdu->which == Z_APDU_searchRequest &&
1359         apdu->u.searchRequest->query &&
1360         apdu->u.searchRequest->query->which == Z_Query_type_104 &&
1361         apdu->u.searchRequest->query->u.type_104->which == Z_External_CQL)
1362     {
1363         Z_RPNQuery *rpnquery = 0;
1364         Z_SearchRequest *sr = apdu->u.searchRequest;
1365         char *addinfo = 0;
1366
1367         yaz_log(LOG_LOG, "%sCQL: %s", m_session_str,
1368                 sr->query->u.type_104->u.cql);
1369
1370         int r = m_cql2rpn.query_transform(sr->query->u.type_104->u.cql,
1371                                           &rpnquery, odr_encode(),
1372                                           &addinfo);
1373         if (r == -3)
1374             yaz_log(LOG_LOG, "%sNo CQL to RPN table", m_session_str);
1375         else if (r)
1376         {
1377             yaz_log(LOG_LOG, "%sCQL Conversion error %d", m_session_str, r);
1378             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1379
1380             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1381             new_apdu->u.searchResponse->records =
1382                 create_nonSurrogateDiagnostics(odr_encode(),
1383                                                yaz_diag_srw_to_bib1(r),
1384                                                addinfo);
1385             *new_apdu->u.searchResponse->searchStatus = 0;
1386
1387             send_to_client(new_apdu);
1388
1389             return 0;
1390         }
1391         else
1392         {
1393             sr->query->which = Z_Query_type_1;
1394             sr->query->u.type_1 = rpnquery;
1395         }
1396         return apdu;
1397     }
1398     return apdu;
1399 }
1400
1401 Z_APDU *Yaz_Proxy::handle_query_validation(Z_APDU *apdu)
1402 {
1403     if (apdu->which == Z_APDU_searchRequest)
1404     {
1405         Z_SearchRequest *sr = apdu->u.searchRequest;
1406         int err = 0;
1407         char *addinfo = 0;
1408
1409         Yaz_ProxyConfig *cfg = check_reconfigure();
1410         if (cfg)
1411             err = cfg->check_query(odr_encode(), m_default_target,
1412                                    sr->query, &addinfo);
1413         if (err)
1414         {
1415             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1416
1417             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1418             new_apdu->u.searchResponse->records =
1419                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
1420             *new_apdu->u.searchResponse->searchStatus = 0;
1421
1422             send_to_client(new_apdu);
1423
1424             return 0;
1425         }
1426     }
1427     return apdu;
1428 }
1429
1430 Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
1431 {
1432     m_marcxml_flag = 0;
1433     if (apdu->which == Z_APDU_searchRequest)
1434     {
1435         Z_SearchRequest *sr = apdu->u.searchRequest;
1436         int err = 0;
1437         char *addinfo = 0;
1438         Yaz_ProxyConfig *cfg = check_reconfigure();
1439
1440         Z_RecordComposition rc_temp, *rc = 0;
1441         if (sr->smallSetElementSetNames)
1442         {
1443             rc_temp.which = Z_RecordComp_simple;
1444             rc_temp.u.simple = sr->smallSetElementSetNames;
1445             rc = &rc_temp;
1446         }
1447
1448         if (cfg)
1449             err = cfg->check_syntax(odr_encode(),
1450                                     m_default_target,
1451                                     sr->preferredRecordSyntax, rc,
1452                                     &addinfo, &m_stylesheet_schema, &m_schema);
1453         if (err == -1)
1454         {
1455             sr->preferredRecordSyntax =
1456                 yaz_oidval_to_z3950oid(odr_encode(), CLASS_RECSYN, VAL_USMARC);
1457             m_marcxml_flag = 1;
1458         }
1459         else if (err)
1460         {
1461             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1462
1463             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1464             new_apdu->u.searchResponse->records =
1465                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
1466             *new_apdu->u.searchResponse->searchStatus = 0;
1467
1468             send_to_client(new_apdu);
1469
1470             return 0;
1471         }
1472     }
1473     else if (apdu->which == Z_APDU_presentRequest)
1474     {
1475         Z_PresentRequest *pr = apdu->u.presentRequest;
1476         int err = 0;
1477         char *addinfo = 0;
1478         Yaz_ProxyConfig *cfg = check_reconfigure();
1479
1480         if (cfg)
1481             err = cfg->check_syntax(odr_encode(), m_default_target,
1482                                     pr->preferredRecordSyntax,
1483                                     pr->recordComposition,
1484                                     &addinfo, &m_stylesheet_schema, &m_schema);
1485         if (err == -1)
1486         {
1487             pr->preferredRecordSyntax =
1488                 yaz_oidval_to_z3950oid(odr_decode(), CLASS_RECSYN, VAL_USMARC);
1489             m_marcxml_flag = 1;
1490         }
1491         else if (err)
1492         {
1493             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1494
1495             new_apdu->u.presentResponse->referenceId = pr->referenceId;
1496             new_apdu->u.presentResponse->records =
1497                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
1498             *new_apdu->u.presentResponse->presentStatus =
1499                 Z_PresentStatus_failure;
1500
1501             send_to_client(new_apdu);
1502
1503             return 0;
1504         }
1505     }
1506     return apdu;
1507 }
1508
1509 Z_ElementSetNames *Yaz_Proxy::mk_esn_from_schema(ODR o, const char *schema)
1510 {
1511     if (!schema)
1512         return 0;
1513     Z_ElementSetNames *esn = (Z_ElementSetNames *)
1514         odr_malloc(o, sizeof(Z_ElementSetNames));
1515     esn->which = Z_ElementSetNames_generic;
1516     esn->u.generic = odr_strdup(o, schema);
1517     return esn;
1518 }
1519
1520 void Yaz_Proxy::handle_incoming_HTTP(Z_HTTP_Request *hreq)
1521 {
1522
1523     if (m_s2z_odr_init)
1524     {
1525         odr_destroy(m_s2z_odr_init);
1526         m_s2z_odr_init = 0;
1527     }
1528     if (m_s2z_odr_search)
1529     {
1530         odr_destroy(m_s2z_odr_search);
1531         m_s2z_odr_search = 0;
1532     }
1533
1534     m_http_keepalive = 0;
1535     m_http_version = 0;
1536     if (!strcmp(hreq->version, "1.0"))
1537     {
1538         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1539         if (v && !strcmp(v, "Keep-Alive"))
1540             m_http_keepalive = 1;
1541         else
1542             m_http_keepalive = 0;
1543         m_http_version = "1.0";
1544     }
1545     else
1546     {
1547         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1548         if (v && !strcmp(v, "close"))
1549             m_http_keepalive = 0;
1550         else
1551             m_http_keepalive = 1;
1552         m_http_version = "1.1";
1553     }
1554
1555     Z_SRW_PDU *srw_pdu = 0;
1556     Z_SOAP *soap_package = 0;
1557     char *charset = 0;
1558     if (yaz_srw_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
1559                        &charset) == 0
1560         || yaz_sru_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
1561                           &charset) == 0)
1562     {
1563         m_s2z_odr_init = odr_createmem(ODR_ENCODE);
1564         m_s2z_odr_search = odr_createmem(ODR_ENCODE);
1565         m_soap_ns = odr_strdup(m_s2z_odr_search, soap_package->ns);
1566         m_s2z_init_apdu = 0;
1567         m_s2z_search_apdu = 0;
1568         m_s2z_present_apdu = 0;
1569
1570         m_s2z_stylesheet = 0;
1571
1572         if (srw_pdu->which == Z_SRW_searchRetrieve_request)
1573         {
1574             Z_SRW_searchRetrieveRequest *srw_req = srw_pdu->u.request;
1575
1576             // save stylesheet
1577             if (srw_req->stylesheet)
1578                 m_s2z_stylesheet =
1579                     odr_strdup(m_s2z_odr_init, srw_req->stylesheet);
1580
1581             // set packing for response records ..
1582             if (srw_req->recordPacking &&
1583                 !strcmp(srw_req->recordPacking, "xml"))
1584                 m_s2z_packing = Z_SRW_recordPacking_XML;
1585             else
1586                 m_s2z_packing = Z_SRW_recordPacking_string;
1587
1588             // prepare search PDU
1589             m_s2z_search_apdu = zget_APDU(m_s2z_odr_search,
1590                                           Z_APDU_searchRequest);
1591             Z_SearchRequest *z_searchRequest =
1592                 m_s2z_search_apdu->u.searchRequest;
1593
1594             z_searchRequest->num_databaseNames = 1;
1595             z_searchRequest->databaseNames = (char**)
1596                 odr_malloc(m_s2z_odr_search, sizeof(char *));
1597             z_searchRequest->databaseNames[0] = odr_strdup(m_s2z_odr_search,
1598                                                            srw_req->database);
1599
1600             // query transformation
1601             Z_Query *query = (Z_Query *)
1602                 odr_malloc(m_s2z_odr_search, sizeof(Z_Query));
1603             z_searchRequest->query = query;
1604
1605             if (srw_req->query_type == Z_SRW_query_type_cql)
1606             {
1607                 Z_External *ext = (Z_External *)
1608                     odr_malloc(m_s2z_odr_search, sizeof(*ext));
1609                 ext->direct_reference =
1610                     odr_getoidbystr(m_s2z_odr_search, "1.2.840.10003.16.2");
1611                 ext->indirect_reference = 0;
1612                 ext->descriptor = 0;
1613                 ext->which = Z_External_CQL;
1614                 ext->u.cql = srw_req->query.cql;
1615
1616                 query->which = Z_Query_type_104;
1617                 query->u.type_104 =  ext;
1618             }
1619             else if (srw_req->query_type == Z_SRW_query_type_pqf)
1620             {
1621                 Z_RPNQuery *RPNquery;
1622                 YAZ_PQF_Parser pqf_parser;
1623
1624                 pqf_parser = yaz_pqf_create ();
1625
1626                 RPNquery = yaz_pqf_parse (pqf_parser, m_s2z_odr_search,
1627                                           srw_req->query.pqf);
1628                 if (!RPNquery)
1629                 {
1630                     const char *pqf_msg;
1631                     size_t off;
1632                     int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
1633                     yaz_log(LOG_LOG, "%*s^\n", off+4, "");
1634                     yaz_log(LOG_LOG, "Bad PQF: %s (code %d)\n", pqf_msg, code);
1635
1636                     send_to_srw_client_error(10);
1637                     return;
1638                 }
1639                 query->which = Z_Query_type_1;
1640                 query->u.type_1 =  RPNquery;
1641
1642                 yaz_pqf_destroy (pqf_parser);
1643             }
1644             else
1645             {
1646                 send_to_srw_client_error(11);
1647                 return;
1648             }
1649
1650             // present
1651             m_s2z_present_apdu = 0;
1652             int max = 0;
1653             if (srw_req->maximumRecords)
1654                 max = *srw_req->maximumRecords;
1655             int start = 1;
1656             if (srw_req->startRecord)
1657                 start = *srw_req->startRecord;
1658             if (max > 0)
1659             {
1660                 // Some backend, such as Voyager doesn't honor piggyback
1661                 // So we use present always (0 &&).
1662                 if (0 && start <= 1)  // Z39.50 piggyback
1663                 {
1664                     *z_searchRequest->smallSetUpperBound = max;
1665                     *z_searchRequest->mediumSetPresentNumber = max;
1666                     *z_searchRequest->largeSetLowerBound = 2000000000; // 2e9
1667
1668                     z_searchRequest->preferredRecordSyntax =
1669                         yaz_oidval_to_z3950oid(m_s2z_odr_search, CLASS_RECSYN,
1670                                                VAL_TEXT_XML);
1671                     if (srw_req->recordSchema)
1672                     {
1673                         z_searchRequest->smallSetElementSetNames =
1674                             z_searchRequest->mediumSetElementSetNames =
1675                             mk_esn_from_schema(m_s2z_odr_search,
1676                                                srw_req->recordSchema);
1677                     }
1678                 }
1679                 else   // Z39.50 present
1680                 {
1681                     m_s2z_present_apdu = zget_APDU(m_s2z_odr_search,
1682                                                    Z_APDU_presentRequest);
1683                     Z_PresentRequest *z_presentRequest =
1684                         m_s2z_present_apdu->u.presentRequest;
1685                     *z_presentRequest->resultSetStartPoint = start;
1686                     *z_presentRequest->numberOfRecordsRequested = max;
1687                     z_presentRequest->preferredRecordSyntax =
1688                         yaz_oidval_to_z3950oid(m_s2z_odr_search, CLASS_RECSYN,
1689                                                VAL_TEXT_XML);
1690                     z_presentRequest->recordComposition =
1691                         (Z_RecordComposition *)
1692                         odr_malloc(m_s2z_odr_search,
1693                                    sizeof(Z_RecordComposition));
1694                     if (srw_req->recordSchema)
1695                     {
1696                         z_presentRequest->recordComposition->which =
1697                             Z_RecordComp_simple;
1698                         z_presentRequest->recordComposition->u.simple =
1699                             mk_esn_from_schema(m_s2z_odr_search,
1700                                                srw_req->recordSchema);
1701                     }
1702                 }
1703             }
1704             if (!m_client)
1705             {
1706                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
1707                                             Z_APDU_initRequest);
1708
1709                 // prevent m_initRequest_apdu memory from being grabbed
1710                 // in Yaz_Proxy::handle_incoming_Z_PDU
1711                 m_initRequest_apdu = m_s2z_init_apdu;
1712                 handle_incoming_Z_PDU(m_s2z_init_apdu);
1713                 return;
1714             }
1715             else
1716             {
1717                 handle_incoming_Z_PDU(m_s2z_search_apdu);
1718                 return;
1719             }
1720         }
1721         else if (srw_pdu->which == Z_SRW_explain_request)
1722         {
1723             Z_SRW_explainRequest *srw_req = srw_pdu->u.explain_request;
1724
1725             // save stylesheet
1726             if (srw_req->stylesheet)
1727                 m_s2z_stylesheet =
1728                     odr_strdup(m_s2z_odr_init, srw_req->stylesheet);
1729
1730             if (srw_req->recordPacking &&
1731                 !strcmp(srw_req->recordPacking, "xml"))
1732                 m_s2z_packing = Z_SRW_recordPacking_XML;
1733             else
1734                 m_s2z_packing = Z_SRW_recordPacking_string;
1735
1736             if (!m_client)
1737             {
1738                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
1739                                             Z_APDU_initRequest);
1740
1741                 // prevent m_initRequest_apdu memory from being grabbed
1742                 // in Yaz_Proxy::handle_incoming_Z_PDU
1743                 m_initRequest_apdu = m_s2z_init_apdu;
1744                 handle_incoming_Z_PDU(m_s2z_init_apdu);
1745             }
1746             else
1747                 send_srw_explain();
1748             return;
1749         }
1750     }
1751     int len = 0;
1752     Z_GDU *p = z_get_HTTP_Response(odr_encode(), 400);
1753     send_GDU(p, &len);
1754     timeout(1);
1755 }
1756
1757 void Yaz_Proxy::handle_incoming_Z_PDU(Z_APDU *apdu)
1758 {
1759     if (!m_client && m_invalid_session)
1760     {
1761         m_apdu_invalid_session = apdu;
1762         m_mem_invalid_session = odr_extract_mem(odr_decode());
1763         apdu = m_initRequest_apdu;
1764     }
1765
1766     // Determine our client.
1767     Z_OtherInformation **oi;
1768     get_otherInfoAPDU(apdu, &oi);
1769     m_client = get_client(apdu, get_cookie(oi), get_proxy(oi));
1770     if (!m_client)
1771     {
1772         delete this;
1773         return;
1774     }
1775     m_client->m_server = this;
1776
1777     if (apdu->which == Z_APDU_initRequest)
1778     {
1779         if (apdu->u.initRequest->implementationId)
1780             yaz_log(LOG_LOG, "%simplementationId: %s",
1781                     m_session_str, apdu->u.initRequest->implementationId);
1782         if (apdu->u.initRequest->implementationName)
1783             yaz_log(LOG_LOG, "%simplementationName: %s",
1784                     m_session_str, apdu->u.initRequest->implementationName);
1785         if (apdu->u.initRequest->implementationVersion)
1786             yaz_log(LOG_LOG, "%simplementationVersion: %s",
1787                     m_session_str, apdu->u.initRequest->implementationVersion);
1788         if (m_initRequest_apdu == 0)
1789         {
1790             if (m_initRequest_mem)
1791                 nmem_destroy(m_initRequest_mem);
1792             m_initRequest_apdu = apdu;
1793             m_initRequest_mem = odr_extract_mem(odr_decode());
1794         }
1795         if (m_client->m_init_flag)
1796         {
1797             if (handle_init_response_for_invalid_session(apdu))
1798                 return;
1799             Z_APDU *apdu2 = m_client->m_initResponse;
1800             apdu2->u.initResponse->otherInfo = 0;
1801             if (m_client->m_cookie && *m_client->m_cookie)
1802                 set_otherInformationString(apdu2, VAL_COOKIE, 1,
1803                                            m_client->m_cookie);
1804             apdu2->u.initResponse->referenceId =
1805                 apdu->u.initRequest->referenceId;
1806             send_to_client(apdu2);
1807             return;
1808         }
1809         m_client->m_init_flag = 1;
1810     }
1811     handle_max_record_retrieve(apdu);
1812
1813     if (apdu)
1814         apdu = handle_syntax_validation(apdu);
1815
1816     if (apdu)
1817         apdu = handle_query_transformation(apdu);
1818
1819     if (apdu)
1820         apdu = handle_query_validation(apdu);
1821
1822     if (apdu)
1823         apdu = result_set_optimize(apdu);
1824     if (!apdu)
1825     {
1826         m_client->timeout(m_target_idletime);  // mark it active even
1827         // though we didn't use it
1828         return;
1829     }
1830
1831     // delete other info part from PDU before sending to target
1832     get_otherInfoAPDU(apdu, &oi);
1833     if (oi)
1834         *oi = 0;
1835
1836     if (apdu->which == Z_APDU_presentRequest &&
1837         m_client->m_resultSetStartPoint == 0)
1838     {
1839         Z_PresentRequest *pr = apdu->u.presentRequest;
1840         m_client->m_resultSetStartPoint = *pr->resultSetStartPoint;
1841         m_client->m_cache.copy_presentRequest(apdu->u.presentRequest);
1842     } else {
1843         m_client->m_resultSetStartPoint = 0;
1844     }
1845     if (m_client->send_to_target(apdu) < 0)
1846     {
1847         delete m_client;
1848         m_client = 0;
1849         delete this;
1850     }
1851     else
1852         m_client->m_waiting = 1;
1853 }
1854
1855 void Yaz_Proxy::connectNotify()
1856 {
1857 }
1858
1859 void Yaz_Proxy::shutdown()
1860 {
1861     m_invalid_session = 0;
1862     // only keep if keep_alive flag is set...
1863     if (m_client &&
1864         m_client->m_pdu_recv < m_keepalive_limit_pdu &&
1865         m_client->m_bytes_recv+m_client->m_bytes_sent < m_keepalive_limit_bw &&
1866         m_client->m_waiting == 0)
1867     {
1868         yaz_log(LOG_LOG, "%sShutdown (client to proxy) keepalive %s",
1869                  m_session_str,
1870                  m_client->get_hostname());
1871         yaz_log(LOG_LOG, "%sbw=%d pdu=%d limit-bw=%d limit-pdu=%d",
1872                 m_session_str, m_client->m_pdu_recv,
1873                 m_client->m_bytes_sent + m_client->m_bytes_recv,
1874                 m_keepalive_limit_bw, m_keepalive_limit_pdu);
1875         assert (m_client->m_waiting != 2);
1876         // Tell client (if any) that no server connection is there..
1877         m_client->m_server = 0;
1878         m_invalid_session = 0;
1879     }
1880     else if (m_client)
1881     {
1882         yaz_log (LOG_LOG, "%sShutdown (client to proxy) close %s",
1883                  m_session_str,
1884                  m_client->get_hostname());
1885         assert (m_client->m_waiting != 2);
1886         delete m_client;
1887     }
1888     else if (!m_parent)
1889     {
1890         yaz_log (LOG_LOG, "%sshutdown (client to proxy) bad state",
1891                  m_session_str);
1892         assert (m_parent);
1893     }
1894     else
1895     {
1896         yaz_log (LOG_LOG, "%sShutdown (client to proxy)",
1897                  m_session_str);
1898     }
1899     if (m_parent)
1900         m_parent->pre_init();
1901     delete this;
1902 }
1903
1904 const char *Yaz_ProxyClient::get_session_str()
1905 {
1906     if (!m_server)
1907         return "0 ";
1908     return m_server->get_session_str();
1909 }
1910
1911 void Yaz_ProxyClient::shutdown()
1912 {
1913     yaz_log (LOG_LOG, "%sShutdown (proxy to target) %s", get_session_str(),
1914              get_hostname());
1915     delete m_server;
1916     delete this;
1917 }
1918
1919 void Yaz_Proxy::failNotify()
1920 {
1921     inc_request_no();
1922     yaz_log (LOG_LOG, "%sConnection closed by client",
1923              get_session_str());
1924     shutdown();
1925 }
1926
1927 void Yaz_ProxyClient::failNotify()
1928 {
1929     if (m_server)
1930         m_server->inc_request_no();
1931     yaz_log (LOG_LOG, "%sConnection closed by target %s",
1932              get_session_str(), get_hostname());
1933     shutdown();
1934 }
1935
1936 void Yaz_ProxyClient::connectNotify()
1937 {
1938     const char *s = get_session_str();
1939     const char *h = get_hostname();
1940     yaz_log (LOG_LOG, "%sConnection accepted by %s timeout=%d", s, h,
1941              m_target_idletime);
1942     timeout(m_target_idletime);
1943     if (!m_server)
1944         pre_init_client();
1945 }
1946
1947 IYaz_PDU_Observer *Yaz_ProxyClient::sessionNotify(IYaz_PDU_Observable
1948                                                   *the_PDU_Observable, int fd)
1949 {
1950     return new Yaz_ProxyClient(the_PDU_Observable, 0);
1951 }
1952
1953 Yaz_ProxyClient::~Yaz_ProxyClient()
1954 {
1955     if (m_prev)
1956         *m_prev = m_next;
1957     if (m_next)
1958         m_next->m_prev = m_prev;
1959     m_waiting = 2;     // for debugging purposes only.
1960     odr_destroy(m_init_odr);
1961     delete m_last_query;
1962     xfree (m_last_resultSetId);
1963     xfree (m_cookie);
1964 }
1965
1966 void Yaz_ProxyClient::pre_init_client()
1967 {
1968     Z_APDU *apdu = create_Z_PDU(Z_APDU_initRequest);
1969     Z_InitRequest *req = apdu->u.initRequest;
1970
1971     ODR_MASK_SET(req->options, Z_Options_search);
1972     ODR_MASK_SET(req->options, Z_Options_present);
1973     ODR_MASK_SET(req->options, Z_Options_namedResultSets);
1974     ODR_MASK_SET(req->options, Z_Options_triggerResourceCtrl);
1975     ODR_MASK_SET(req->options, Z_Options_scan);
1976     ODR_MASK_SET(req->options, Z_Options_sort);
1977     ODR_MASK_SET(req->options, Z_Options_extendedServices);
1978     ODR_MASK_SET(req->options, Z_Options_delSet);
1979
1980     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_1);
1981     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_2);
1982     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_3);
1983
1984     if (send_to_target(apdu) < 0)
1985     {
1986         delete this;
1987     }
1988     else
1989     {
1990         m_waiting = 1;
1991         m_init_flag = 1;
1992     }
1993 }
1994
1995 void Yaz_Proxy::pre_init()
1996 {
1997     int i;
1998     const char *name = 0;
1999     const char *zurl_in_use[MAX_ZURL_PLEX];
2000     int limit_bw, limit_pdu, limit_req;
2001     int target_idletime, client_idletime;
2002     int max_clients;
2003     int keepalive_limit_bw, keepalive_limit_pdu;
2004     int pre_init;
2005     const char *cql2rpn = 0;
2006
2007     Yaz_ProxyConfig *cfg = check_reconfigure();
2008
2009     zurl_in_use[0] = 0;
2010
2011     if (m_log_mask & PROXY_LOG_APDU_CLIENT)
2012         set_APDU_yazlog(1);
2013     else
2014         set_APDU_yazlog(0);
2015
2016     for (i = 0; cfg && cfg->get_target_no(i, &name, zurl_in_use,
2017                                           &limit_bw, &limit_pdu, &limit_req,
2018                                           &target_idletime, &client_idletime,
2019                                           &max_clients,
2020                                           &keepalive_limit_bw,
2021                                           &keepalive_limit_pdu,
2022                                           &pre_init,
2023                                           &cql2rpn) ; i++)
2024     {
2025         if (pre_init)
2026         {
2027             int j;
2028             for (j = 0; zurl_in_use[j]; j++)
2029             {
2030                 Yaz_ProxyClient *c;
2031                 int spare = 0;
2032                 int in_use = 0;
2033                 int other = 0;
2034                 for (c = m_clientPool; c; c = c->m_next)
2035                 {
2036                     if (!strcmp(zurl_in_use[j], c->get_hostname()))
2037                     {
2038                         if (c->m_cookie == 0)
2039                         {
2040                             if (c->m_server == 0)
2041                                 spare++;
2042                             else
2043                                 in_use++;
2044                         }
2045                         else
2046                             other++;
2047                     }
2048                 }
2049                 yaz_log(LOG_LOG, "%spre-init %s %s use=%d other=%d spare=%d "
2050                         "preinit=%d",m_session_str,
2051                         name, zurl_in_use[j], in_use, other, spare, pre_init);
2052                 if (spare < pre_init)
2053                 {
2054                     c = new Yaz_ProxyClient(m_PDU_Observable->clone(), this);
2055                     c->m_next = m_clientPool;
2056                     if (c->m_next)
2057                         c->m_next->m_prev = &c->m_next;
2058                     m_clientPool = c;
2059                     c->m_prev = &m_clientPool;
2060
2061                     if (m_log_mask & PROXY_LOG_APDU_SERVER)
2062                         c->set_APDU_yazlog(1);
2063                     else
2064                         c->set_APDU_yazlog(0);
2065
2066                     if (c->client(zurl_in_use[j]))
2067                     {
2068                         timeout(60);
2069                         delete c;
2070                         return;
2071                     }
2072                     c->timeout(30);
2073                     c->m_waiting = 1;
2074                     c->m_target_idletime = target_idletime;
2075                     c->m_seqno = m_seqno++;
2076                 }
2077             }
2078         }
2079     }
2080 }
2081
2082 void Yaz_Proxy::timeoutNotify()
2083 {
2084     if (m_parent)
2085     {
2086         if (m_bw_hold_PDU)
2087         {
2088             timeout(m_client_idletime);
2089             Z_GDU *apdu = m_bw_hold_PDU;
2090             m_bw_hold_PDU = 0;
2091
2092             if (apdu->which == Z_GDU_Z3950)
2093                 handle_incoming_Z_PDU(apdu->u.z3950);
2094             else if (apdu->which == Z_GDU_HTTP_Request)
2095                 handle_incoming_HTTP(apdu->u.HTTP_Request);
2096         }
2097         else
2098         {
2099             inc_request_no();
2100
2101             yaz_log (LOG_LOG, "%sTimeout (client to proxy)", m_session_str);
2102             shutdown();
2103         }
2104     }
2105     else
2106     {
2107         timeout(600);
2108         pre_init();
2109     }
2110 }
2111
2112 void Yaz_ProxyClient::timeoutNotify()
2113 {
2114     if (m_server)
2115         m_server->inc_request_no();
2116
2117     yaz_log (LOG_LOG, "%sTimeout (proxy to target) %s", get_session_str(),
2118              get_hostname());
2119     m_waiting = 1;
2120     m_root->pre_init();
2121     shutdown();
2122 }
2123
2124 Yaz_ProxyClient::Yaz_ProxyClient(IYaz_PDU_Observable *the_PDU_Observable,
2125                                  Yaz_Proxy *parent) :
2126     Yaz_Z_Assoc (the_PDU_Observable)
2127 {
2128     m_cookie = 0;
2129     m_next = 0;
2130     m_prev = 0;
2131     m_init_flag = 0;
2132     m_last_query = 0;
2133     m_last_resultSetId = 0;
2134     m_last_resultCount = 0;
2135     m_last_ok = 0;
2136     m_sr_transform = 0;
2137     m_waiting = 0;
2138     m_init_odr = odr_createmem (ODR_DECODE);
2139     m_initResponse = 0;
2140     m_resultSetStartPoint = 0;
2141     m_bytes_sent = m_bytes_recv = 0;
2142     m_pdu_recv = 0;
2143     m_server = 0;
2144     m_seqno = 0;
2145     m_target_idletime = 600;
2146     m_root = parent;
2147 }
2148
2149 const char *Yaz_Proxy::option(const char *name, const char *value)
2150 {
2151     if (!strcmp (name, "optimize")) {
2152         if (value) {
2153             xfree (m_optimize);
2154             m_optimize = xstrdup (value);
2155         }
2156         return m_optimize;
2157     }
2158     return 0;
2159 }
2160
2161 void Yaz_ProxyClient::recv_HTTP_response(Z_HTTP_Response *apdu, int len)
2162 {
2163
2164 }
2165
2166 void Yaz_ProxyClient::recv_GDU(Z_GDU *apdu, int len)
2167 {
2168     if (apdu->which == Z_GDU_Z3950)
2169         recv_Z_PDU(apdu->u.z3950, len);
2170     else if (apdu->which == Z_GDU_HTTP_Response)
2171         recv_HTTP_response(apdu->u.HTTP_Response, len);
2172     else
2173         shutdown();
2174 }
2175
2176 int Yaz_Proxy::handle_init_response_for_invalid_session(Z_APDU *apdu)
2177 {
2178     if (!m_invalid_session)
2179         return 0;
2180     m_invalid_session = 0;
2181     handle_incoming_Z_PDU(m_apdu_invalid_session);
2182     assert (m_mem_invalid_session);
2183     nmem_destroy(m_mem_invalid_session);
2184     m_mem_invalid_session = 0;
2185     return 1;
2186 }
2187
2188 void Yaz_ProxyClient::recv_Z_PDU(Z_APDU *apdu, int len)
2189 {
2190     m_bytes_recv += len;
2191     m_pdu_recv++;
2192     m_waiting = 0;
2193     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
2194         yaz_log (LOG_LOG, "%sReceiving %s from %s %d bytes", get_session_str(),
2195                  apdu_name(apdu), get_hostname(), len);
2196     if (apdu->which == Z_APDU_initResponse)
2197     {
2198         if (!m_server)  // if this is a pre init session , check for more
2199             m_root->pre_init();
2200         NMEM nmem = odr_extract_mem (odr_decode());
2201         odr_reset (m_init_odr);
2202         nmem_transfer (m_init_odr->mem, nmem);
2203         m_initResponse = apdu;
2204
2205         Z_InitResponse *ir = apdu->u.initResponse;
2206         char *im0 = ir->implementationName;
2207
2208         char *im1 = (char*)
2209             odr_malloc(m_init_odr, 20 + (im0 ? strlen(im0) : 0));
2210         *im1 = '\0';
2211         if (im0)
2212         {
2213             strcat(im1, im0);
2214             strcat(im1, " ");
2215         }
2216         strcat(im1, "(YAZ Proxy)");
2217         ir->implementationName = im1;
2218
2219         nmem_destroy (nmem);
2220
2221         if (m_server && m_server->handle_init_response_for_invalid_session(apdu))
2222             return;
2223     }
2224     if (apdu->which == Z_APDU_searchResponse)
2225     {
2226         Z_SearchResponse *sr = apdu->u.searchResponse;
2227         m_last_resultCount = *sr->resultCount;
2228         int status = *sr->searchStatus;
2229         if (status && (!sr->records || sr->records->which == Z_Records_DBOSD))
2230         {
2231             m_last_ok = 1;
2232
2233             if (sr->records && sr->records->which == Z_Records_DBOSD)
2234             {
2235                 m_cache.add(odr_decode(),
2236                             sr->records->u.databaseOrSurDiagnostics, 1,
2237                             *sr->resultCount);
2238             }
2239         }
2240     }
2241     if (apdu->which == Z_APDU_presentResponse)
2242     {
2243         Z_PresentResponse *pr = apdu->u.presentResponse;
2244         if (m_sr_transform)
2245         {
2246             m_sr_transform = 0;
2247             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
2248             Z_SearchResponse *sr = new_apdu->u.searchResponse;
2249             sr->referenceId = pr->referenceId;
2250             *sr->resultCount = m_last_resultCount;
2251             sr->records = pr->records;
2252             sr->nextResultSetPosition = pr->nextResultSetPosition;
2253             sr->numberOfRecordsReturned = pr->numberOfRecordsReturned;
2254             apdu = new_apdu;
2255         }
2256         if (pr->records &&
2257             pr->records->which == Z_Records_DBOSD && m_resultSetStartPoint)
2258         {
2259             m_cache.add(odr_decode(),
2260                         pr->records->u.databaseOrSurDiagnostics,
2261                         m_resultSetStartPoint, -1);
2262             m_resultSetStartPoint = 0;
2263         }
2264     }
2265     if (m_cookie)
2266         set_otherInformationString (apdu, VAL_COOKIE, 1, m_cookie);
2267     if (m_server)
2268     {
2269         m_server->send_to_client(apdu);
2270     }
2271     if (apdu->which == Z_APDU_close)
2272     {
2273         shutdown();
2274     }
2275 }
2276
2277 int Yaz_Proxy::server(const char *addr)
2278 {
2279     int r = Yaz_Z_Assoc::server(addr);
2280     if (!r)
2281     {
2282         yaz_log(LOG_LOG, "%sStarted proxy " VERSION " on %s", m_session_str, addr);
2283         timeout(1);
2284     }
2285     return r;
2286 }
2287