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 1.89 2004-01-14 12:14:13 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     xsltStylesheetPtr xsp;
 589
 590     xsp = xsltParseStylesheetFile((const xmlChar *) m_stylesheet_schema);
 591
 592     int i;
 593     for (i = 0; i < p->num_records; i++)
 594     {
 595         Z_NamePlusRecord *npr = p->records[i];
 596         if (npr->which == Z_NamePlusRecord_databaseRecord)
 597         {
 598             Z_External *r = npr->u.databaseRecord;
 599             if (r->which == Z_External_octet)
 600             {
 601                 xmlDocPtr res, doc = xmlParseMemory(
 602                     (char*) r->u.octet_aligned->buf,
 603                     r->u.octet_aligned->len);
 604
 605                 res = xsltApplyStylesheet(xsp, doc, 0);
 606
 607                 xmlChar *out_buf;
 608                 int out_len;
 609                 xmlDocDumpFormatMemory (res, &out_buf, &out_len, 1);
 610
 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 && m_s2z_hit_count > 0)
 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                 m_s2z_present_apdu = 0;
 919                 send_to_srw_client_ok(m_s2z_hit_count, res->records, 1);
 920             }
 921         }
 922         else if (m_s2z_present_apdu && apdu->which == Z_APDU_presentResponse)
 923         {
 924             int start =
 925                 *m_s2z_present_apdu->u.presentRequest->resultSetStartPoint;
 926
 927             m_s2z_present_apdu = 0;
 928             Z_PresentResponse *res = apdu->u.presentResponse;
 929             send_to_srw_client_ok(m_s2z_hit_count, res->records, start);
 930         }
 931     }
 932     else
 933     {
 934         if (m_log_mask & PROXY_LOG_REQ_CLIENT)
 935             yaz_log (LOG_LOG, "%sSending %s to client", m_session_str,
 936                      apdu_name(apdu));
 937         int r = send_Z_PDU(apdu, len);
 938         logtime();
 939         return r;
 940     }
 941     return 0;
 942 }
 943
 944 int Yaz_Proxy::send_to_client(Z_APDU *apdu)
 945 {
 946     int len = 0;
 947     int kill_session = 0;
 948     if (apdu->which == Z_APDU_searchResponse)
 949     {
 950         Z_SearchResponse *sr = apdu->u.searchResponse;
 951         Z_Records *p = sr->records;
 952         if (p && p->which == Z_Records_NSD)
 953         {
 954             Z_DiagRec dr, *dr_p = &dr;
 955             dr.which = Z_DiagRec_defaultFormat;
 956             dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
 957
 958             *sr->searchStatus = 0;
 959             display_diagrecs(&dr_p, 1);
 960         }
 961         else
 962         {
 963             if (p && p->which == Z_Records_DBOSD)
 964             {
 965                 if (m_marcxml_flag)
 966                     convert_to_marcxml(p->u.databaseOrSurDiagnostics);
 967                 convert_xsl(p->u.databaseOrSurDiagnostics);
 968             }
 969             if (sr->resultCount)
 970             {
 971                 yaz_log(LOG_LOG, "%s%d hits", m_session_str,
 972                         *sr->resultCount);
 973                 if (*sr->resultCount < 0)
 974                 {
 975                     m_invalid_session = 1;
 976                     kill_session = 1;
 977
 978                     *sr->searchStatus = 0;
 979                     sr->records =
 980                         create_nonSurrogateDiagnostics(odr_encode(), 2, 0);
 981                     *sr->resultCount = 0;
 982                 }
 983             }
 984         }
 985     }
 986     else if (apdu->which == Z_APDU_presentResponse)
 987     {
 988         Z_PresentResponse *sr = apdu->u.presentResponse;
 989         Z_Records *p = sr->records;
 990         if (p && p->which == Z_Records_NSD)
 991         {
 992             Z_DiagRec dr, *dr_p = &dr;
 993             dr.which = Z_DiagRec_defaultFormat;
 994             dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
 995             if (*sr->presentStatus == Z_PresentStatus_success)
 996                 *sr->presentStatus = Z_PresentStatus_failure;
 997             display_diagrecs(&dr_p, 1);
 998         }
 999         if (p && p->which == Z_Records_DBOSD)
1000         {
1001             if (m_marcxml_flag)
1002                 convert_to_marcxml(p->u.databaseOrSurDiagnostics);
1003             convert_xsl(p->u.databaseOrSurDiagnostics);
1004         }
1005     }
1006     int r = send_PDU_convert(apdu, &len);
1007     if (r)
1008         return r;
1009     m_bytes_sent += len;
1010     m_bw_stat.add_bytes(len);
1011     if (kill_session)
1012     {
1013         delete m_client;
1014         m_client = 0;
1015         m_parent->pre_init();
1016     }
1017     if (m_http_version)
1018     {
1019         if (!m_http_keepalive)
1020         {
1021 #if 1
1022             timeout(1);
1023 #else
1024             shutdown();
1025             return -1;
1026 #endif
1027         }
1028     }
1029     return r;
1030 }
1031
1032 int Yaz_ProxyClient::send_to_target(Z_APDU *apdu)
1033 {
1034     int len = 0;
1035     const char *apdu_name_tmp = apdu_name(apdu);
1036     int r = send_Z_PDU(apdu, &len);
1037     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
1038         yaz_log (LOG_LOG, "%sSending %s to %s %d bytes",
1039                  get_session_str(),
1040                  apdu_name_tmp, get_hostname(), len);
1041     m_bytes_sent += len;
1042     return r;
1043 }
1044
1045 Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
1046 {
1047     if (apdu->which == Z_APDU_presentRequest)
1048     {
1049         Z_PresentRequest *pr = apdu->u.presentRequest;
1050         int toget = *pr->numberOfRecordsRequested;
1051         int start = *pr->resultSetStartPoint;
1052
1053         yaz_log(LOG_LOG, "%sPresent %s %d+%d", m_session_str,
1054                 pr->resultSetId, start, toget);
1055
1056         if (*m_parent->m_optimize == '0')
1057             return apdu;
1058
1059         if (!m_client->m_last_resultSetId)
1060         {
1061             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1062             new_apdu->u.presentResponse->records =
1063                 create_nonSurrogateDiagnostics(odr_encode(), 30,
1064                                                pr->resultSetId);
1065             send_to_client(new_apdu);
1066             return 0;
1067         }
1068         if (!strcmp(m_client->m_last_resultSetId, pr->resultSetId))
1069         {
1070             if (start+toget-1 > m_client->m_last_resultCount)
1071             {
1072                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1073                 new_apdu->u.presentResponse->records =
1074                     create_nonSurrogateDiagnostics(odr_encode(), 13, 0);
1075                 send_to_client(new_apdu);
1076                 return 0;
1077             }
1078             Z_NamePlusRecordList *npr;
1079             if (m_client->m_cache.lookup (odr_encode(), &npr, start, toget,
1080                                           pr->preferredRecordSyntax,
1081                                           pr->recordComposition))
1082             {
1083                 yaz_log (LOG_LOG, "%sReturned cached records for present request",
1084                          m_session_str);
1085                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1086                 new_apdu->u.presentResponse->referenceId = pr->referenceId;
1087
1088                 new_apdu->u.presentResponse->numberOfRecordsReturned
1089                     = odr_intdup(odr_encode(), toget);
1090
1091                 new_apdu->u.presentResponse->records = (Z_Records*)
1092                     odr_malloc(odr_encode(), sizeof(Z_Records));
1093                 new_apdu->u.presentResponse->records->which = Z_Records_DBOSD;
1094                 new_apdu->u.presentResponse->records->u.databaseOrSurDiagnostics = npr;
1095                 new_apdu->u.presentResponse->nextResultSetPosition =
1096                     odr_intdup(odr_encode(), start+toget);
1097
1098                 send_to_client(new_apdu);
1099                 return 0;
1100             }
1101         }
1102     }
1103
1104     if (apdu->which != Z_APDU_searchRequest)
1105         return apdu;
1106     Z_SearchRequest *sr = apdu->u.searchRequest;
1107     Yaz_Z_Query *this_query = new Yaz_Z_Query;
1108     Yaz_Z_Databases this_databases;
1109
1110     this_databases.set(sr->num_databaseNames, (const char **)
1111                        sr->databaseNames);
1112
1113     this_query->set_Z_Query(sr->query);
1114
1115     char query_str[120];
1116     this_query->print(query_str, sizeof(query_str)-1);
1117     yaz_log(LOG_LOG, "%sSearch %s", m_session_str, query_str);
1118
1119     if (*m_parent->m_optimize != '0' &&
1120         m_client->m_last_ok && m_client->m_last_query &&
1121         m_client->m_last_query->match(this_query) &&
1122         !strcmp(m_client->m_last_resultSetId, sr->resultSetName) &&
1123         m_client->m_last_databases.match(this_databases))
1124     {
1125         delete this_query;
1126         if (m_client->m_last_resultCount > *sr->smallSetUpperBound &&
1127             m_client->m_last_resultCount < *sr->largeSetLowerBound)
1128         {
1129             Z_NamePlusRecordList *npr;
1130             int toget = *sr->mediumSetPresentNumber;
1131             Z_RecordComposition *comp = 0;
1132
1133             if (toget > m_client->m_last_resultCount)
1134                 toget = m_client->m_last_resultCount;
1135
1136             if (sr->mediumSetElementSetNames)
1137             {
1138                 comp = (Z_RecordComposition *)
1139                     odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
1140                 comp->which = Z_RecordComp_simple;
1141                 comp->u.simple = sr->mediumSetElementSetNames;
1142             }
1143
1144             if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
1145                                           sr->preferredRecordSyntax, comp))
1146             {
1147                 yaz_log (LOG_LOG, "%sReturned cached records for medium set",
1148                          m_session_str);
1149                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1150                 new_apdu->u.searchResponse->referenceId = sr->referenceId;
1151                 new_apdu->u.searchResponse->resultCount =
1152                     &m_client->m_last_resultCount;
1153
1154                 new_apdu->u.searchResponse->numberOfRecordsReturned
1155                     = odr_intdup(odr_encode(), toget);
1156
1157                 new_apdu->u.searchResponse->presentStatus =
1158                     odr_intdup(odr_encode(), Z_PresentStatus_success);
1159                 new_apdu->u.searchResponse->records = (Z_Records*)
1160                     odr_malloc(odr_encode(), sizeof(Z_Records));
1161                 new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
1162                 new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
1163                 new_apdu->u.searchResponse->nextResultSetPosition =
1164                     odr_intdup(odr_encode(), toget+1);
1165                 send_to_client(new_apdu);
1166                 return 0;
1167             }
1168             else
1169             {
1170                 // medium Set
1171                 // send present request (medium size)
1172                 yaz_log (LOG_LOG, "%sOptimizing search for medium set",
1173                          m_session_str);
1174
1175                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
1176                 Z_PresentRequest *pr = new_apdu->u.presentRequest;
1177                 pr->referenceId = sr->referenceId;
1178                 pr->resultSetId = sr->resultSetName;
1179                 pr->preferredRecordSyntax = sr->preferredRecordSyntax;
1180                 *pr->numberOfRecordsRequested = toget;
1181                 pr->recordComposition = comp;
1182                 m_client->m_sr_transform = 1;
1183                 return new_apdu;
1184             }
1185         }
1186         else if (m_client->m_last_resultCount >= *sr->largeSetLowerBound ||
1187             m_client->m_last_resultCount <= 0)
1188         {
1189             // large set. Return pseudo-search response immediately
1190             yaz_log (LOG_LOG, "%sOptimizing search for large set",
1191                      m_session_str);
1192             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1193             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1194             new_apdu->u.searchResponse->resultCount =
1195                 &m_client->m_last_resultCount;
1196             send_to_client(new_apdu);
1197             return 0;
1198         }
1199         else
1200         {
1201             Z_NamePlusRecordList *npr;
1202             int toget = m_client->m_last_resultCount;
1203             Z_RecordComposition *comp = 0;
1204             // small set
1205             // send a present request (small set)
1206
1207             if (sr->smallSetElementSetNames)
1208             {
1209                 comp = (Z_RecordComposition *)
1210                     odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
1211                 comp->which = Z_RecordComp_simple;
1212                 comp->u.simple = sr->smallSetElementSetNames;
1213             }
1214
1215             if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
1216                                           sr->preferredRecordSyntax, comp))
1217             {
1218                 yaz_log (LOG_LOG, "%sReturned cached records for small set",
1219                          m_session_str);
1220                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1221                 new_apdu->u.searchResponse->referenceId = sr->referenceId;
1222                 new_apdu->u.searchResponse->resultCount =
1223                     &m_client->m_last_resultCount;
1224
1225                 new_apdu->u.searchResponse->numberOfRecordsReturned
1226                     = odr_intdup(odr_encode(), toget);
1227
1228                 new_apdu->u.searchResponse->presentStatus =
1229                     odr_intdup(odr_encode(), Z_PresentStatus_success);
1230                 new_apdu->u.searchResponse->records = (Z_Records*)
1231                     odr_malloc(odr_encode(), sizeof(Z_Records));
1232                 new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
1233                 new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
1234                 new_apdu->u.searchResponse->nextResultSetPosition =
1235                     odr_intdup(odr_encode(), toget+1);
1236                 send_to_client(new_apdu);
1237                 return 0;
1238             }
1239             else
1240             {
1241                 yaz_log (LOG_LOG, "%sOptimizing search for small set",
1242                          m_session_str);
1243                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
1244                 Z_PresentRequest *pr = new_apdu->u.presentRequest;
1245                 pr->referenceId = sr->referenceId;
1246                 pr->resultSetId = sr->resultSetName;
1247                 pr->preferredRecordSyntax = sr->preferredRecordSyntax;
1248                 *pr->numberOfRecordsRequested = toget;
1249                 pr->recordComposition = comp;
1250                 m_client->m_sr_transform = 1;
1251                 return new_apdu;
1252             }
1253         }
1254     }
1255     else  // query doesn't match
1256     {
1257         delete m_client->m_last_query;
1258         m_client->m_last_query = this_query;
1259         m_client->m_last_ok = 0;
1260         m_client->m_cache.clear();
1261         m_client->m_resultSetStartPoint = 0;
1262
1263         xfree (m_client->m_last_resultSetId);
1264         m_client->m_last_resultSetId = xstrdup (sr->resultSetName);
1265
1266         m_client->m_last_databases.set(sr->num_databaseNames,
1267                                        (const char **) sr->databaseNames);
1268     }
1269     return apdu;
1270 }
1271
1272
1273 void Yaz_Proxy::inc_request_no()
1274 {
1275     char *cp = strchr(m_session_str, ' ');
1276     m_request_no++;
1277     if (cp)
1278         sprintf(cp+1, "%d ", m_request_no);
1279 }
1280
1281 void Yaz_Proxy::recv_GDU(Z_GDU *apdu, int len)
1282 {
1283     inc_request_no();
1284
1285     m_bytes_recv += len;
1286
1287     if (m_log_mask & PROXY_LOG_APDU_CLIENT)
1288         yaz_log (LOG_DEBUG, "%sReceiving %s from client %d bytes",
1289                  m_session_str, gdu_name(apdu), len);
1290
1291     if (m_bw_hold_PDU)     // double incoming PDU. shutdown now.
1292         shutdown();
1293
1294     m_bw_stat.add_bytes(len);
1295     m_pdu_stat.add_bytes(1);
1296
1297     gettimeofday(&m_time_tv, 0);
1298
1299     int bw_total = m_bw_stat.get_total();
1300     int pdu_total = m_pdu_stat.get_total();
1301
1302     int reduce = 0;
1303     if (m_bw_max)
1304     {
1305         if (bw_total > m_bw_max)
1306         {
1307             reduce = (bw_total/m_bw_max);
1308         }
1309     }
1310     if (m_pdu_max)
1311     {
1312         if (pdu_total > m_pdu_max)
1313         {
1314             int nreduce = (m_pdu_max >= 60) ? 1 : 60/m_pdu_max;
1315             reduce = (reduce > nreduce) ? reduce : nreduce;
1316         }
1317     }
1318     if (reduce)
1319     {
1320         yaz_log(LOG_LOG, "%sdelay=%d bw=%d pdu=%d limit-bw=%d limit-pdu=%d",
1321                 m_session_str, reduce, bw_total, pdu_total,
1322                 m_bw_max, m_pdu_max);
1323
1324         m_bw_hold_PDU = apdu;  // save PDU and signal "on hold"
1325         timeout(reduce);       // call us reduce seconds later
1326     }
1327     else if (apdu->which == Z_GDU_Z3950)
1328         handle_incoming_Z_PDU(apdu->u.z3950);
1329     else if (apdu->which == Z_GDU_HTTP_Request)
1330         handle_incoming_HTTP(apdu->u.HTTP_Request);
1331 }
1332
1333 void Yaz_Proxy::handle_max_record_retrieve(Z_APDU *apdu)
1334 {
1335     if (m_max_record_retrieve)
1336     {
1337         if (apdu->which == Z_APDU_presentRequest)
1338         {
1339             Z_PresentRequest *pr = apdu->u.presentRequest;
1340             if (pr->numberOfRecordsRequested &&
1341                 *pr->numberOfRecordsRequested > m_max_record_retrieve)
1342                 *pr->numberOfRecordsRequested = m_max_record_retrieve;
1343         }
1344     }
1345 }
1346
1347 Z_Records *Yaz_Proxy::create_nonSurrogateDiagnostics(ODR odr,
1348                                                      int error,
1349                                                      const char *addinfo)
1350 {
1351     Z_Records *rec = (Z_Records *)
1352         odr_malloc (odr, sizeof(*rec));
1353     int *err = (int *)
1354         odr_malloc (odr, sizeof(*err));
1355     Z_DiagRec *drec = (Z_DiagRec *)
1356         odr_malloc (odr, sizeof(*drec));
1357     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
1358         odr_malloc (odr, sizeof(*dr));
1359     *err = error;
1360     rec->which = Z_Records_NSD;
1361     rec->u.nonSurrogateDiagnostic = dr;
1362     dr->diagnosticSetId =
1363         yaz_oidval_to_z3950oid (odr, CLASS_DIAGSET, VAL_BIB1);
1364     dr->condition = err;
1365     dr->which = Z_DefaultDiagFormat_v2Addinfo;
1366     dr->u.v2Addinfo = odr_strdup (odr, addinfo ? addinfo : "");
1367     return rec;
1368 }
1369
1370 Z_APDU *Yaz_Proxy::handle_query_transformation(Z_APDU *apdu)
1371 {
1372     if (apdu->which == Z_APDU_searchRequest &&
1373         apdu->u.searchRequest->query &&
1374         apdu->u.searchRequest->query->which == Z_Query_type_104 &&
1375         apdu->u.searchRequest->query->u.type_104->which == Z_External_CQL)
1376     {
1377         Z_RPNQuery *rpnquery = 0;
1378         Z_SearchRequest *sr = apdu->u.searchRequest;
1379         char *addinfo = 0;
1380
1381         yaz_log(LOG_LOG, "%sCQL: %s", m_session_str,
1382                 sr->query->u.type_104->u.cql);
1383
1384         int r = m_cql2rpn.query_transform(sr->query->u.type_104->u.cql,
1385                                           &rpnquery, odr_encode(),
1386                                           &addinfo);
1387         if (r == -3)
1388             yaz_log(LOG_LOG, "%sNo CQL to RPN table", m_session_str);
1389         else if (r)
1390         {
1391             yaz_log(LOG_LOG, "%sCQL Conversion error %d", m_session_str, r);
1392             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1393
1394             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1395             new_apdu->u.searchResponse->records =
1396                 create_nonSurrogateDiagnostics(odr_encode(),
1397                                                yaz_diag_srw_to_bib1(r),
1398                                                addinfo);
1399             *new_apdu->u.searchResponse->searchStatus = 0;
1400
1401             send_to_client(new_apdu);
1402
1403             return 0;
1404         }
1405         else
1406         {
1407             sr->query->which = Z_Query_type_1;
1408             sr->query->u.type_1 = rpnquery;
1409         }
1410         return apdu;
1411     }
1412     return apdu;
1413 }
1414
1415 Z_APDU *Yaz_Proxy::handle_query_validation(Z_APDU *apdu)
1416 {
1417     if (apdu->which == Z_APDU_searchRequest)
1418     {
1419         Z_SearchRequest *sr = apdu->u.searchRequest;
1420         int err = 0;
1421         char *addinfo = 0;
1422
1423         Yaz_ProxyConfig *cfg = check_reconfigure();
1424         if (cfg)
1425             err = cfg->check_query(odr_encode(), m_default_target,
1426                                    sr->query, &addinfo);
1427         if (err)
1428         {
1429             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1430
1431             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1432             new_apdu->u.searchResponse->records =
1433                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
1434             *new_apdu->u.searchResponse->searchStatus = 0;
1435
1436             send_to_client(new_apdu);
1437
1438             return 0;
1439         }
1440     }
1441     return apdu;
1442 }
1443
1444 Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
1445 {
1446     m_marcxml_flag = 0;
1447     if (apdu->which == Z_APDU_searchRequest)
1448     {
1449         Z_SearchRequest *sr = apdu->u.searchRequest;
1450         int err = 0;
1451         char *addinfo = 0;
1452         Yaz_ProxyConfig *cfg = check_reconfigure();
1453
1454         Z_RecordComposition rc_temp, *rc = 0;
1455         if (sr->smallSetElementSetNames)
1456         {
1457             rc_temp.which = Z_RecordComp_simple;
1458             rc_temp.u.simple = sr->smallSetElementSetNames;
1459             rc = &rc_temp;
1460         }
1461
1462         if (cfg)
1463             err = cfg->check_syntax(odr_encode(),
1464                                     m_default_target,
1465                                     sr->preferredRecordSyntax, rc,
1466                                     &addinfo, &m_stylesheet_schema, &m_schema);
1467         if (err == -1)
1468         {
1469             sr->preferredRecordSyntax =
1470                 yaz_oidval_to_z3950oid(odr_encode(), CLASS_RECSYN, VAL_USMARC);
1471             m_marcxml_flag = 1;
1472         }
1473         else if (err)
1474         {
1475             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1476
1477             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1478             new_apdu->u.searchResponse->records =
1479                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
1480             *new_apdu->u.searchResponse->searchStatus = 0;
1481
1482             send_to_client(new_apdu);
1483
1484             return 0;
1485         }
1486     }
1487     else if (apdu->which == Z_APDU_presentRequest)
1488     {
1489         Z_PresentRequest *pr = apdu->u.presentRequest;
1490         int err = 0;
1491         char *addinfo = 0;
1492         Yaz_ProxyConfig *cfg = check_reconfigure();
1493
1494         if (cfg)
1495             err = cfg->check_syntax(odr_encode(), m_default_target,
1496                                     pr->preferredRecordSyntax,
1497                                     pr->recordComposition,
1498                                     &addinfo, &m_stylesheet_schema, &m_schema);
1499         if (err == -1)
1500         {
1501             pr->preferredRecordSyntax =
1502                 yaz_oidval_to_z3950oid(odr_decode(), CLASS_RECSYN, VAL_USMARC);
1503             m_marcxml_flag = 1;
1504         }
1505         else if (err)
1506         {
1507             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1508
1509             new_apdu->u.presentResponse->referenceId = pr->referenceId;
1510             new_apdu->u.presentResponse->records =
1511                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
1512             *new_apdu->u.presentResponse->presentStatus =
1513                 Z_PresentStatus_failure;
1514
1515             send_to_client(new_apdu);
1516
1517             return 0;
1518         }
1519     }
1520     return apdu;
1521 }
1522
1523 Z_ElementSetNames *Yaz_Proxy::mk_esn_from_schema(ODR o, const char *schema)
1524 {
1525     if (!schema)
1526         return 0;
1527     Z_ElementSetNames *esn = (Z_ElementSetNames *)
1528         odr_malloc(o, sizeof(Z_ElementSetNames));
1529     esn->which = Z_ElementSetNames_generic;
1530     esn->u.generic = odr_strdup(o, schema);
1531     return esn;
1532 }
1533
1534 void Yaz_Proxy::handle_incoming_HTTP(Z_HTTP_Request *hreq)
1535 {
1536
1537     if (m_s2z_odr_init)
1538     {
1539         odr_destroy(m_s2z_odr_init);
1540         m_s2z_odr_init = 0;
1541     }
1542     if (m_s2z_odr_search)
1543     {
1544         odr_destroy(m_s2z_odr_search);
1545         m_s2z_odr_search = 0;
1546     }
1547
1548     m_http_keepalive = 0;
1549     m_http_version = 0;
1550     if (!strcmp(hreq->version, "1.0"))
1551     {
1552         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1553         if (v && !strcmp(v, "Keep-Alive"))
1554             m_http_keepalive = 1;
1555         else
1556             m_http_keepalive = 0;
1557         m_http_version = "1.0";
1558     }
1559     else
1560     {
1561         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1562         if (v && !strcmp(v, "close"))
1563             m_http_keepalive = 0;
1564         else
1565             m_http_keepalive = 1;
1566         m_http_version = "1.1";
1567     }
1568
1569     Z_SRW_PDU *srw_pdu = 0;
1570     Z_SOAP *soap_package = 0;
1571     char *charset = 0;
1572     Z_SRW_diagnostic *diagnostic = 0;
1573     int num_diagnostic = 0;
1574     if (yaz_srw_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
1575                        &charset) == 0
1576         || yaz_sru_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
1577                           &charset, &diagnostic, &num_diagnostic) == 0)
1578     {
1579         m_s2z_odr_init = odr_createmem(ODR_ENCODE);
1580         m_s2z_odr_search = odr_createmem(ODR_ENCODE);
1581         m_soap_ns = odr_strdup(m_s2z_odr_search, soap_package->ns);
1582         m_s2z_init_apdu = 0;
1583         m_s2z_search_apdu = 0;
1584         m_s2z_present_apdu = 0;
1585
1586         m_s2z_stylesheet = 0;
1587
1588         if (srw_pdu->which == Z_SRW_searchRetrieve_request)
1589         {
1590             Z_SRW_searchRetrieveRequest *srw_req = srw_pdu->u.request;
1591
1592             // recordXPath unsupported.
1593             if (srw_req->recordXPath)
1594             {
1595                 yaz_add_srw_diagnostic(odr_decode(),
1596                                        &diagnostic, &num_diagnostic,
1597                                        72, 0);
1598             }
1599             // must have a query
1600             if (!srw_req->query.cql)
1601             {
1602                 yaz_add_srw_diagnostic(odr_decode(),
1603                                        &diagnostic, &num_diagnostic,
1604                                        7, "query");
1605             }
1606             // sort unsupported
1607             if (srw_req->sort_type != Z_SRW_sort_type_none)
1608             {
1609                 yaz_add_srw_diagnostic(odr_decode(),
1610                                        &diagnostic, &num_diagnostic,
1611                                        80, 0);
1612             }
1613             // save stylesheet
1614             if (srw_req->stylesheet)
1615                 m_s2z_stylesheet =
1616                     odr_strdup(m_s2z_odr_init, srw_req->stylesheet);
1617
1618             // set packing for response records ..
1619             if (srw_req->recordPacking &&
1620                 !strcmp(srw_req->recordPacking, "xml"))
1621                 m_s2z_packing = Z_SRW_recordPacking_XML;
1622             else
1623                 m_s2z_packing = Z_SRW_recordPacking_string;
1624
1625             if (num_diagnostic)
1626             {
1627                 Z_SRW_PDU *srw_pdu =
1628                     yaz_srw_get(odr_encode(),
1629                                 Z_SRW_searchRetrieve_response);
1630                 Z_SRW_searchRetrieveResponse *srw_res = srw_pdu->u.response;
1631
1632                 srw_res->diagnostics = diagnostic;
1633                 srw_res->num_diagnostics = num_diagnostic;
1634                 send_srw_response(srw_pdu);
1635                 return;
1636             }
1637
1638             // prepare search PDU
1639             m_s2z_search_apdu = zget_APDU(m_s2z_odr_search,
1640                                           Z_APDU_searchRequest);
1641             Z_SearchRequest *z_searchRequest =
1642                 m_s2z_search_apdu->u.searchRequest;
1643
1644             z_searchRequest->num_databaseNames = 1;
1645             z_searchRequest->databaseNames = (char**)
1646                 odr_malloc(m_s2z_odr_search, sizeof(char *));
1647             z_searchRequest->databaseNames[0] = odr_strdup(m_s2z_odr_search,
1648                                                            srw_req->database);
1649
1650             // query transformation
1651             Z_Query *query = (Z_Query *)
1652                 odr_malloc(m_s2z_odr_search, sizeof(Z_Query));
1653             z_searchRequest->query = query;
1654
1655             if (srw_req->query_type == Z_SRW_query_type_cql)
1656             {
1657                 Z_External *ext = (Z_External *)
1658                     odr_malloc(m_s2z_odr_search, sizeof(*ext));
1659                 ext->direct_reference =
1660                     odr_getoidbystr(m_s2z_odr_search, "1.2.840.10003.16.2");
1661                 ext->indirect_reference = 0;
1662                 ext->descriptor = 0;
1663                 ext->which = Z_External_CQL;
1664                 ext->u.cql = srw_req->query.cql;
1665
1666                 query->which = Z_Query_type_104;
1667                 query->u.type_104 =  ext;
1668             }
1669             else if (srw_req->query_type == Z_SRW_query_type_pqf)
1670             {
1671                 Z_RPNQuery *RPNquery;
1672                 YAZ_PQF_Parser pqf_parser;
1673
1674                 pqf_parser = yaz_pqf_create ();
1675
1676                 RPNquery = yaz_pqf_parse (pqf_parser, m_s2z_odr_search,
1677                                           srw_req->query.pqf);
1678                 if (!RPNquery)
1679                 {
1680                     const char *pqf_msg;
1681                     size_t off;
1682                     int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
1683                     yaz_log(LOG_LOG, "%*s^\n", off+4, "");
1684                     yaz_log(LOG_LOG, "Bad PQF: %s (code %d)\n", pqf_msg, code);
1685
1686                     send_to_srw_client_error(10, 0);
1687                     return;
1688                 }
1689                 query->which = Z_Query_type_1;
1690                 query->u.type_1 =  RPNquery;
1691
1692                 yaz_pqf_destroy (pqf_parser);
1693             }
1694             else
1695             {
1696                 send_to_srw_client_error(7, "query");
1697                 return;
1698             }
1699
1700             // present
1701             m_s2z_present_apdu = 0;
1702             int max = 0;
1703             if (srw_req->maximumRecords)
1704                 max = *srw_req->maximumRecords;
1705             int start = 1;
1706             if (srw_req->startRecord)
1707                 start = *srw_req->startRecord;
1708             if (max > 0)
1709             {
1710                 // Some backend, such as Voyager doesn't honor piggyback
1711                 // So we use present always (0 &&).
1712                 if (0 && start <= 1)  // Z39.50 piggyback
1713                 {
1714                     *z_searchRequest->smallSetUpperBound = max;
1715                     *z_searchRequest->mediumSetPresentNumber = max;
1716                     *z_searchRequest->largeSetLowerBound = 2000000000; // 2e9
1717
1718                     z_searchRequest->preferredRecordSyntax =
1719                         yaz_oidval_to_z3950oid(m_s2z_odr_search, CLASS_RECSYN,
1720                                                VAL_TEXT_XML);
1721                     if (srw_req->recordSchema)
1722                     {
1723                         z_searchRequest->smallSetElementSetNames =
1724                             z_searchRequest->mediumSetElementSetNames =
1725                             mk_esn_from_schema(m_s2z_odr_search,
1726                                                srw_req->recordSchema);
1727                     }
1728                 }
1729                 else   // Z39.50 present
1730                 {
1731                     m_s2z_present_apdu = zget_APDU(m_s2z_odr_search,
1732                                                    Z_APDU_presentRequest);
1733                     Z_PresentRequest *z_presentRequest =
1734                         m_s2z_present_apdu->u.presentRequest;
1735                     *z_presentRequest->resultSetStartPoint = start;
1736                     *z_presentRequest->numberOfRecordsRequested = max;
1737                     z_presentRequest->preferredRecordSyntax =
1738                         yaz_oidval_to_z3950oid(m_s2z_odr_search, CLASS_RECSYN,
1739                                                VAL_TEXT_XML);
1740                     z_presentRequest->recordComposition =
1741                         (Z_RecordComposition *)
1742                         odr_malloc(m_s2z_odr_search,
1743                                    sizeof(Z_RecordComposition));
1744                     if (srw_req->recordSchema)
1745                     {
1746                         z_presentRequest->recordComposition->which =
1747                             Z_RecordComp_simple;
1748                         z_presentRequest->recordComposition->u.simple =
1749                             mk_esn_from_schema(m_s2z_odr_search,
1750                                                srw_req->recordSchema);
1751                     }
1752                 }
1753             }
1754             if (!m_client)
1755             {
1756                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
1757                                             Z_APDU_initRequest);
1758
1759                 // prevent m_initRequest_apdu memory from being grabbed
1760                 // in Yaz_Proxy::handle_incoming_Z_PDU
1761                 m_initRequest_apdu = m_s2z_init_apdu;
1762                 handle_incoming_Z_PDU(m_s2z_init_apdu);
1763                 return;
1764             }
1765             else
1766             {
1767                 handle_incoming_Z_PDU(m_s2z_search_apdu);
1768                 return;
1769             }
1770         }
1771         else if (srw_pdu->which == Z_SRW_explain_request)
1772         {
1773             Z_SRW_explainRequest *srw_req = srw_pdu->u.explain_request;
1774
1775             // save stylesheet
1776             if (srw_req->stylesheet)
1777                 m_s2z_stylesheet =
1778                     odr_strdup(m_s2z_odr_init, srw_req->stylesheet);
1779
1780             if (srw_req->recordPacking &&
1781                 !strcmp(srw_req->recordPacking, "xml"))
1782                 m_s2z_packing = Z_SRW_recordPacking_XML;
1783             else
1784                 m_s2z_packing = Z_SRW_recordPacking_string;
1785
1786             if (num_diagnostic)
1787             {
1788                 send_srw_explain_response(diagnostic, num_diagnostic);
1789                 return;
1790             }
1791
1792             if (!m_client)
1793             {
1794                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
1795                                             Z_APDU_initRequest);
1796
1797                 // prevent m_initRequest_apdu memory from being grabbed
1798                 // in Yaz_Proxy::handle_incoming_Z_PDU
1799                 m_initRequest_apdu = m_s2z_init_apdu;
1800                 handle_incoming_Z_PDU(m_s2z_init_apdu);
1801             }
1802             else
1803                 send_srw_explain_response(0, 0);
1804             return;
1805         }
1806         else if (srw_pdu->which == Z_SRW_scan_request)
1807         {
1808             yaz_add_srw_diagnostic(odr_decode(),
1809                                    &diagnostic, &num_diagnostic,
1810                                    4, "scan");
1811             Z_SRW_PDU *srw_pdu =
1812                 yaz_srw_get(odr_encode(),
1813                             Z_SRW_scan_response);
1814             Z_SRW_scanResponse *srw_res = srw_pdu->u.scan_response;
1815
1816             srw_res->diagnostics = diagnostic;
1817             srw_res->num_diagnostics = num_diagnostic;
1818             send_srw_response(srw_pdu);
1819             return;
1820         }
1821         else
1822         {
1823             send_to_srw_client_error(4, 0);
1824         }
1825     }
1826     int len = 0;
1827     Z_GDU *p = z_get_HTTP_Response(odr_encode(), 400);
1828     send_GDU(p, &len);
1829     timeout(1);
1830 }
1831
1832 void Yaz_Proxy::handle_incoming_Z_PDU(Z_APDU *apdu)
1833 {
1834     if (!m_client && m_invalid_session)
1835     {
1836         m_apdu_invalid_session = apdu;
1837         m_mem_invalid_session = odr_extract_mem(odr_decode());
1838         apdu = m_initRequest_apdu;
1839     }
1840
1841     // Determine our client.
1842     Z_OtherInformation **oi;
1843     get_otherInfoAPDU(apdu, &oi);
1844     m_client = get_client(apdu, get_cookie(oi), get_proxy(oi));
1845     if (!m_client)
1846     {
1847         delete this;
1848         return;
1849     }
1850     m_client->m_server = this;
1851
1852     if (apdu->which == Z_APDU_initRequest)
1853     {
1854         if (apdu->u.initRequest->implementationId)
1855             yaz_log(LOG_LOG, "%simplementationId: %s",
1856                     m_session_str, apdu->u.initRequest->implementationId);
1857         if (apdu->u.initRequest->implementationName)
1858             yaz_log(LOG_LOG, "%simplementationName: %s",
1859                     m_session_str, apdu->u.initRequest->implementationName);
1860         if (apdu->u.initRequest->implementationVersion)
1861             yaz_log(LOG_LOG, "%simplementationVersion: %s",
1862                     m_session_str, apdu->u.initRequest->implementationVersion);
1863         if (m_initRequest_apdu == 0)
1864         {
1865             if (m_initRequest_mem)
1866                 nmem_destroy(m_initRequest_mem);
1867             m_initRequest_apdu = apdu;
1868             m_initRequest_mem = odr_extract_mem(odr_decode());
1869         }
1870         if (m_client->m_init_flag)
1871         {
1872             if (handle_init_response_for_invalid_session(apdu))
1873                 return;
1874             Z_APDU *apdu2 = m_client->m_initResponse;
1875             apdu2->u.initResponse->otherInfo = 0;
1876             if (m_client->m_cookie && *m_client->m_cookie)
1877                 set_otherInformationString(apdu2, VAL_COOKIE, 1,
1878                                            m_client->m_cookie);
1879             apdu2->u.initResponse->referenceId =
1880                 apdu->u.initRequest->referenceId;
1881             send_to_client(apdu2);
1882             return;
1883         }
1884         m_client->m_init_flag = 1;
1885     }
1886     handle_max_record_retrieve(apdu);
1887
1888     if (apdu)
1889         apdu = handle_syntax_validation(apdu);
1890
1891     if (apdu)
1892         apdu = handle_query_transformation(apdu);
1893
1894     if (apdu)
1895         apdu = handle_query_validation(apdu);
1896
1897     if (apdu)
1898         apdu = result_set_optimize(apdu);
1899     if (!apdu)
1900     {
1901         m_client->timeout(m_target_idletime);  // mark it active even
1902         // though we didn't use it
1903         return;
1904     }
1905
1906     // delete other info part from PDU before sending to target
1907     get_otherInfoAPDU(apdu, &oi);
1908     if (oi)
1909         *oi = 0;
1910
1911     if (apdu->which == Z_APDU_presentRequest &&
1912         m_client->m_resultSetStartPoint == 0)
1913     {
1914         Z_PresentRequest *pr = apdu->u.presentRequest;
1915         m_client->m_resultSetStartPoint = *pr->resultSetStartPoint;
1916         m_client->m_cache.copy_presentRequest(apdu->u.presentRequest);
1917     } else {
1918         m_client->m_resultSetStartPoint = 0;
1919     }
1920     if (m_client->send_to_target(apdu) < 0)
1921     {
1922         delete m_client;
1923         m_client = 0;
1924         delete this;
1925     }
1926     else
1927         m_client->m_waiting = 1;
1928 }
1929
1930 void Yaz_Proxy::connectNotify()
1931 {
1932 }
1933
1934 void Yaz_Proxy::shutdown()
1935 {
1936     m_invalid_session = 0;
1937     // only keep if keep_alive flag is set...
1938     if (m_client &&
1939         m_client->m_pdu_recv < m_keepalive_limit_pdu &&
1940         m_client->m_bytes_recv+m_client->m_bytes_sent < m_keepalive_limit_bw &&
1941         m_client->m_waiting == 0)
1942     {
1943         yaz_log(LOG_LOG, "%sShutdown (client to proxy) keepalive %s",
1944                  m_session_str,
1945                  m_client->get_hostname());
1946         yaz_log(LOG_LOG, "%sbw=%d pdu=%d limit-bw=%d limit-pdu=%d",
1947                 m_session_str, m_client->m_pdu_recv,
1948                 m_client->m_bytes_sent + m_client->m_bytes_recv,
1949                 m_keepalive_limit_bw, m_keepalive_limit_pdu);
1950         assert (m_client->m_waiting != 2);
1951         // Tell client (if any) that no server connection is there..
1952         m_client->m_server = 0;
1953         m_invalid_session = 0;
1954     }
1955     else if (m_client)
1956     {
1957         yaz_log (LOG_LOG, "%sShutdown (client to proxy) close %s",
1958                  m_session_str,
1959                  m_client->get_hostname());
1960         assert (m_client->m_waiting != 2);
1961         delete m_client;
1962     }
1963     else if (!m_parent)
1964     {
1965         yaz_log (LOG_LOG, "%sshutdown (client to proxy) bad state",
1966                  m_session_str);
1967         assert (m_parent);
1968     }
1969     else
1970     {
1971         yaz_log (LOG_LOG, "%sShutdown (client to proxy)",
1972                  m_session_str);
1973     }
1974     if (m_parent)
1975         m_parent->pre_init();
1976     delete this;
1977 }
1978
1979 const char *Yaz_ProxyClient::get_session_str()
1980 {
1981     if (!m_server)
1982         return "0 ";
1983     return m_server->get_session_str();
1984 }
1985
1986 void Yaz_ProxyClient::shutdown()
1987 {
1988     yaz_log (LOG_LOG, "%sShutdown (proxy to target) %s", get_session_str(),
1989              get_hostname());
1990     delete m_server;
1991     delete this;
1992 }
1993
1994 void Yaz_Proxy::failNotify()
1995 {
1996     inc_request_no();
1997     yaz_log (LOG_LOG, "%sConnection closed by client",
1998              get_session_str());
1999     shutdown();
2000 }
2001
2002 void Yaz_ProxyClient::failNotify()
2003 {
2004     if (m_server)
2005         m_server->inc_request_no();
2006     yaz_log (LOG_LOG, "%sConnection closed by target %s",
2007              get_session_str(), get_hostname());
2008     shutdown();
2009 }
2010
2011 void Yaz_ProxyClient::connectNotify()
2012 {
2013     const char *s = get_session_str();
2014     const char *h = get_hostname();
2015     yaz_log (LOG_LOG, "%sConnection accepted by %s timeout=%d", s, h,
2016              m_target_idletime);
2017     timeout(m_target_idletime);
2018     if (!m_server)
2019         pre_init_client();
2020 }
2021
2022 IYaz_PDU_Observer *Yaz_ProxyClient::sessionNotify(IYaz_PDU_Observable
2023                                                   *the_PDU_Observable, int fd)
2024 {
2025     return new Yaz_ProxyClient(the_PDU_Observable, 0);
2026 }
2027
2028 Yaz_ProxyClient::~Yaz_ProxyClient()
2029 {
2030     if (m_prev)
2031         *m_prev = m_next;
2032     if (m_next)
2033         m_next->m_prev = m_prev;
2034     m_waiting = 2;     // for debugging purposes only.
2035     odr_destroy(m_init_odr);
2036     delete m_last_query;
2037     xfree (m_last_resultSetId);
2038     xfree (m_cookie);
2039 }
2040
2041 void Yaz_ProxyClient::pre_init_client()
2042 {
2043     Z_APDU *apdu = create_Z_PDU(Z_APDU_initRequest);
2044     Z_InitRequest *req = apdu->u.initRequest;
2045
2046     ODR_MASK_SET(req->options, Z_Options_search);
2047     ODR_MASK_SET(req->options, Z_Options_present);
2048     ODR_MASK_SET(req->options, Z_Options_namedResultSets);
2049     ODR_MASK_SET(req->options, Z_Options_triggerResourceCtrl);
2050     ODR_MASK_SET(req->options, Z_Options_scan);
2051     ODR_MASK_SET(req->options, Z_Options_sort);
2052     ODR_MASK_SET(req->options, Z_Options_extendedServices);
2053     ODR_MASK_SET(req->options, Z_Options_delSet);
2054
2055     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_1);
2056     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_2);
2057     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_3);
2058
2059     if (send_to_target(apdu) < 0)
2060     {
2061         delete this;
2062     }
2063     else
2064     {
2065         m_waiting = 1;
2066         m_init_flag = 1;
2067     }
2068 }
2069
2070 void Yaz_Proxy::pre_init()
2071 {
2072     int i;
2073     const char *name = 0;
2074     const char *zurl_in_use[MAX_ZURL_PLEX];
2075     int limit_bw, limit_pdu, limit_req;
2076     int target_idletime, client_idletime;
2077     int max_clients;
2078     int keepalive_limit_bw, keepalive_limit_pdu;
2079     int pre_init;
2080     const char *cql2rpn = 0;
2081
2082     Yaz_ProxyConfig *cfg = check_reconfigure();
2083
2084     zurl_in_use[0] = 0;
2085
2086     if (m_log_mask & PROXY_LOG_APDU_CLIENT)
2087         set_APDU_yazlog(1);
2088     else
2089         set_APDU_yazlog(0);
2090
2091     for (i = 0; cfg && cfg->get_target_no(i, &name, zurl_in_use,
2092                                           &limit_bw, &limit_pdu, &limit_req,
2093                                           &target_idletime, &client_idletime,
2094                                           &max_clients,
2095                                           &keepalive_limit_bw,
2096                                           &keepalive_limit_pdu,
2097                                           &pre_init,
2098                                           &cql2rpn) ; i++)
2099     {
2100         if (pre_init)
2101         {
2102             int j;
2103             for (j = 0; zurl_in_use[j]; j++)
2104             {
2105                 Yaz_ProxyClient *c;
2106                 int spare = 0;
2107                 int in_use = 0;
2108                 int other = 0;
2109                 for (c = m_clientPool; c; c = c->m_next)
2110                 {
2111                     if (!strcmp(zurl_in_use[j], c->get_hostname()))
2112                     {
2113                         if (c->m_cookie == 0)
2114                         {
2115                             if (c->m_server == 0)
2116                                 spare++;
2117                             else
2118                                 in_use++;
2119                         }
2120                         else
2121                             other++;
2122                     }
2123                 }
2124                 yaz_log(LOG_LOG, "%spre-init %s %s use=%d other=%d spare=%d "
2125                         "preinit=%d",m_session_str,
2126                         name, zurl_in_use[j], in_use, other, spare, pre_init);
2127                 if (spare < pre_init)
2128                 {
2129                     c = new Yaz_ProxyClient(m_PDU_Observable->clone(), this);
2130                     c->m_next = m_clientPool;
2131                     if (c->m_next)
2132                         c->m_next->m_prev = &c->m_next;
2133                     m_clientPool = c;
2134                     c->m_prev = &m_clientPool;
2135
2136                     if (m_log_mask & PROXY_LOG_APDU_SERVER)
2137                         c->set_APDU_yazlog(1);
2138                     else
2139                         c->set_APDU_yazlog(0);
2140
2141                     if (c->client(zurl_in_use[j]))
2142                     {
2143                         timeout(60);
2144                         delete c;
2145                         return;
2146                     }
2147                     c->timeout(30);
2148                     c->m_waiting = 1;
2149                     c->m_target_idletime = target_idletime;
2150                     c->m_seqno = m_seqno++;
2151                 }
2152             }
2153         }
2154     }
2155 }
2156
2157 void Yaz_Proxy::timeoutNotify()
2158 {
2159     if (m_parent)
2160     {
2161         if (m_bw_hold_PDU)
2162         {
2163             timeout(m_client_idletime);
2164             Z_GDU *apdu = m_bw_hold_PDU;
2165             m_bw_hold_PDU = 0;
2166
2167             if (apdu->which == Z_GDU_Z3950)
2168                 handle_incoming_Z_PDU(apdu->u.z3950);
2169             else if (apdu->which == Z_GDU_HTTP_Request)
2170                 handle_incoming_HTTP(apdu->u.HTTP_Request);
2171         }
2172         else
2173         {
2174             inc_request_no();
2175
2176             yaz_log (LOG_LOG, "%sTimeout (client to proxy)", m_session_str);
2177             shutdown();
2178         }
2179     }
2180     else
2181     {
2182         timeout(600);
2183         pre_init();
2184     }
2185 }
2186
2187 void Yaz_Proxy::markInvalid()
2188 {
2189     m_client = 0;
2190     m_invalid_session = 1;
2191 }
2192
2193 void Yaz_ProxyClient::timeoutNotify()
2194 {
2195     if (m_server)
2196         m_server->inc_request_no();
2197
2198     yaz_log (LOG_LOG, "%sTimeout (proxy to target) %s", get_session_str(),
2199              get_hostname());
2200     m_waiting = 1;
2201     m_root->pre_init();
2202     if (m_server && m_init_flag)
2203     {
2204         // target timed out in a session that was properly initialized
2205         // server object stay alive but we mark it as invalid so it
2206         // gets initialized again
2207         m_server->markInvalid();
2208         m_server = 0;
2209     }
2210     shutdown();
2211 }
2212
2213 Yaz_ProxyClient::Yaz_ProxyClient(IYaz_PDU_Observable *the_PDU_Observable,
2214                                  Yaz_Proxy *parent) :
2215     Yaz_Z_Assoc (the_PDU_Observable)
2216 {
2217     m_cookie = 0;
2218     m_next = 0;
2219     m_prev = 0;
2220     m_init_flag = 0;
2221     m_last_query = 0;
2222     m_last_resultSetId = 0;
2223     m_last_resultCount = 0;
2224     m_last_ok = 0;
2225     m_sr_transform = 0;
2226     m_waiting = 0;
2227     m_init_odr = odr_createmem (ODR_DECODE);
2228     m_initResponse = 0;
2229     m_resultSetStartPoint = 0;
2230     m_bytes_sent = m_bytes_recv = 0;
2231     m_pdu_recv = 0;
2232     m_server = 0;
2233     m_seqno = 0;
2234     m_target_idletime = 600;
2235     m_root = parent;
2236 }
2237
2238 const char *Yaz_Proxy::option(const char *name, const char *value)
2239 {
2240     if (!strcmp (name, "optimize")) {
2241         if (value) {
2242             xfree (m_optimize);
2243             m_optimize = xstrdup (value);
2244         }
2245         return m_optimize;
2246     }
2247     return 0;
2248 }
2249
2250 void Yaz_ProxyClient::recv_HTTP_response(Z_HTTP_Response *apdu, int len)
2251 {
2252
2253 }
2254
2255 void Yaz_ProxyClient::recv_GDU(Z_GDU *apdu, int len)
2256 {
2257     if (apdu->which == Z_GDU_Z3950)
2258         recv_Z_PDU(apdu->u.z3950, len);
2259     else if (apdu->which == Z_GDU_HTTP_Response)
2260         recv_HTTP_response(apdu->u.HTTP_Response, len);
2261     else
2262         shutdown();
2263 }
2264
2265 int Yaz_Proxy::handle_init_response_for_invalid_session(Z_APDU *apdu)
2266 {
2267     if (!m_invalid_session)
2268         return 0;
2269     m_invalid_session = 0;
2270     handle_incoming_Z_PDU(m_apdu_invalid_session);
2271     assert (m_mem_invalid_session);
2272     nmem_destroy(m_mem_invalid_session);
2273     m_mem_invalid_session = 0;
2274     return 1;
2275 }
2276
2277 void Yaz_ProxyClient::recv_Z_PDU(Z_APDU *apdu, int len)
2278 {
2279     m_bytes_recv += len;
2280     m_pdu_recv++;
2281     m_waiting = 0;
2282     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
2283         yaz_log (LOG_LOG, "%sReceiving %s from %s %d bytes", get_session_str(),
2284                  apdu_name(apdu), get_hostname(), len);
2285     if (apdu->which == Z_APDU_initResponse)
2286     {
2287         if (!m_server)  // if this is a pre init session , check for more
2288             m_root->pre_init();
2289         NMEM nmem = odr_extract_mem (odr_decode());
2290         odr_reset (m_init_odr);
2291         nmem_transfer (m_init_odr->mem, nmem);
2292         m_initResponse = apdu;
2293
2294         Z_InitResponse *ir = apdu->u.initResponse;
2295         char *im0 = ir->implementationName;
2296
2297         char *im1 = (char*)
2298             odr_malloc(m_init_odr, 20 + (im0 ? strlen(im0) : 0));
2299         *im1 = '\0';
2300         if (im0)
2301         {
2302             strcat(im1, im0);
2303             strcat(im1, " ");
2304         }
2305         strcat(im1, "(YAZ Proxy)");
2306         ir->implementationName = im1;
2307
2308         nmem_destroy (nmem);
2309
2310         if (m_server && m_server->handle_init_response_for_invalid_session(apdu))
2311             return;
2312     }
2313     if (apdu->which == Z_APDU_searchResponse)
2314     {
2315         Z_SearchResponse *sr = apdu->u.searchResponse;
2316         m_last_resultCount = *sr->resultCount;
2317         int status = *sr->searchStatus;
2318         if (status && (!sr->records || sr->records->which == Z_Records_DBOSD))
2319         {
2320             m_last_ok = 1;
2321
2322             if (sr->records && sr->records->which == Z_Records_DBOSD)
2323             {
2324                 m_cache.add(odr_decode(),
2325                             sr->records->u.databaseOrSurDiagnostics, 1,
2326                             *sr->resultCount);
2327             }
2328         }
2329     }
2330     if (apdu->which == Z_APDU_presentResponse)
2331     {
2332         Z_PresentResponse *pr = apdu->u.presentResponse;
2333         if (m_sr_transform)
2334         {
2335             m_sr_transform = 0;
2336             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
2337             Z_SearchResponse *sr = new_apdu->u.searchResponse;
2338             sr->referenceId = pr->referenceId;
2339             *sr->resultCount = m_last_resultCount;
2340             sr->records = pr->records;
2341             sr->nextResultSetPosition = pr->nextResultSetPosition;
2342             sr->numberOfRecordsReturned = pr->numberOfRecordsReturned;
2343             apdu = new_apdu;
2344         }
2345         if (pr->records &&
2346             pr->records->which == Z_Records_DBOSD && m_resultSetStartPoint)
2347         {
2348             m_cache.add(odr_decode(),
2349                         pr->records->u.databaseOrSurDiagnostics,
2350                         m_resultSetStartPoint, -1);
2351             m_resultSetStartPoint = 0;
2352         }
2353     }
2354     if (m_cookie)
2355         set_otherInformationString (apdu, VAL_COOKIE, 1, m_cookie);
2356     if (m_server)
2357     {
2358         m_server->send_to_client(apdu);
2359     }
2360     if (apdu->which == Z_APDU_close)
2361     {
2362         shutdown();
2363     }
2364 }
2365
2366 int Yaz_Proxy::server(const char *addr)
2367 {
2368     int r = Yaz_Z_Assoc::server(addr);
2369     if (!r)
2370     {
2371         yaz_log(LOG_LOG, "%sStarted proxy " VERSION " on %s", m_session_str, addr);
2372         timeout(1);
2373     }
2374     return r;
2375 }
2376