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 1.78 2004-01-07 11:10:55 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 = 0;
 110     m_schema = 0;
 111     m_initRequest_apdu = 0;
 112     m_initRequest_mem = 0;
 113     m_apdu_invalid_session = 0;
 114     m_mem_invalid_session = 0;
 115     m_s2z_odr_init = 0;
 116     m_s2z_odr_search = 0;
 117     m_s2z_init_apdu = 0;
 118     m_s2z_search_apdu = 0;
 119     m_s2z_present_apdu = 0;
 120     m_http_keepalive = 0;
 121     m_http_version = 0;
 122     m_soap_ns = 0;
 123     m_s2z_packing = Z_SRW_recordPacking_string;
 124     m_time_tv.tv_sec = 0;
 125     m_time_tv.tv_usec = 0;
 126 }
 127
 128 Yaz_Proxy::~Yaz_Proxy()
 129 {
 130     yaz_log(LOG_LOG, "%sClosed %d/%d sent/recv bytes total", m_session_str,
 131             m_bytes_sent, m_bytes_recv);
 132     nmem_destroy(m_initRequest_mem);
 133     nmem_destroy(m_mem_invalid_session);
 134     xfree (m_proxyTarget);
 135     xfree (m_default_target);
 136     xfree (m_proxy_authentication);
 137     xfree (m_optimize);
 138     xfree (m_stylesheet);
 139     xfree (m_schema);
 140     if (m_s2z_odr_init)
 141         odr_destroy(m_s2z_odr_init);
 142     if (m_s2z_odr_search)
 143         odr_destroy(m_s2z_odr_search);
 144     delete m_config;
 145 }
 146
 147 int Yaz_Proxy::set_config(const char *config)
 148 {
 149     delete m_config;
 150     m_config = new Yaz_ProxyConfig();
 151     xfree(m_config_fname);
 152     m_config_fname = xstrdup(config);
 153     int r = m_config->read_xml(config);
 154     if (!r)
 155         m_config->get_generic_info(&m_log_mask, &m_max_clients);
 156     return r;
 157 }
 158
 159 void Yaz_Proxy::set_default_target(const char *target)
 160 {
 161     xfree (m_default_target);
 162     m_default_target = 0;
 163     if (target)
 164         m_default_target = (char *) xstrdup (target);
 165 }
 166
 167 void Yaz_Proxy::set_proxy_authentication (const char *auth)
 168 {
 169     xfree (m_proxy_authentication);
 170     m_proxy_authentication = 0;
 171     if (auth)
 172         m_proxy_authentication = (char *) xstrdup (auth);
 173 }
 174
 175 Yaz_ProxyConfig *Yaz_Proxy::check_reconfigure()
 176 {
 177     if (m_parent)
 178         return m_parent->check_reconfigure();
 179
 180     Yaz_ProxyConfig *cfg = m_config;
 181     if (m_reconfig_flag)
 182     {
 183         yaz_log(LOG_LOG, "reconfigure");
 184         yaz_log_reopen();
 185         if (m_config_fname && cfg)
 186         {
 187             yaz_log(LOG_LOG, "reconfigure config %s", m_config_fname);
 188             int r = cfg->read_xml(m_config_fname);
 189             if (r)
 190                 yaz_log(LOG_WARN, "reconfigure failed");
 191             else
 192             {
 193                 m_log_mask = 0;
 194                 cfg->get_generic_info(&m_log_mask, &m_max_clients);
 195             }
 196         }
 197         else
 198             yaz_log(LOG_LOG, "reconfigure");
 199         m_reconfig_flag = 0;
 200     }
 201     return cfg;
 202 }
 203
 204 IYaz_PDU_Observer *Yaz_Proxy::sessionNotify(IYaz_PDU_Observable
 205                                             *the_PDU_Observable, int fd)
 206 {
 207     check_reconfigure();
 208     Yaz_Proxy *new_proxy = new Yaz_Proxy(the_PDU_Observable, this);
 209     new_proxy->m_config = 0;
 210     new_proxy->m_config_fname = 0;
 211     new_proxy->timeout(m_client_idletime);
 212     new_proxy->m_target_idletime = m_target_idletime;
 213     new_proxy->set_default_target(m_default_target);
 214     new_proxy->m_max_clients = m_max_clients;
 215     new_proxy->m_log_mask = m_log_mask;
 216     new_proxy->set_APDU_log(get_APDU_log());
 217     if (m_log_mask & PROXY_LOG_APDU_CLIENT)
 218         new_proxy->set_APDU_yazlog(1);
 219     else
 220         new_proxy->set_APDU_yazlog(0);
 221     new_proxy->set_proxy_authentication(m_proxy_authentication);
 222     sprintf(new_proxy->m_session_str, "%ld:%d ", (long) time(0), m_session_no);
 223     m_session_no++;
 224     yaz_log (LOG_LOG, "%sNew session %s", new_proxy->m_session_str,
 225              the_PDU_Observable->getpeername());
 226     return new_proxy;
 227 }
 228
 229 char *Yaz_Proxy::get_cookie(Z_OtherInformation **otherInfo)
 230 {
 231     int oid[OID_SIZE];
 232     Z_OtherInformationUnit *oi;
 233     struct oident ent;
 234     ent.proto = PROTO_Z3950;
 235     ent.oclass = CLASS_USERINFO;
 236     ent.value = (oid_value) VAL_COOKIE;
 237     assert (oid_ent_to_oid (&ent, oid));
 238
 239     if (oid_ent_to_oid (&ent, oid) &&
 240         (oi = update_otherInformation(otherInfo, 0, oid, 1, 1)) &&
 241         oi->which == Z_OtherInfo_characterInfo)
 242         return oi->information.characterInfo;
 243     return 0;
 244 }
 245
 246 char *Yaz_Proxy::get_proxy(Z_OtherInformation **otherInfo)
 247 {
 248     int oid[OID_SIZE];
 249     Z_OtherInformationUnit *oi;
 250     struct oident ent;
 251     ent.proto = PROTO_Z3950;
 252     ent.oclass = CLASS_USERINFO;
 253     ent.value = (oid_value) VAL_PROXY;
 254     if (oid_ent_to_oid (&ent, oid) &&
 255         (oi = update_otherInformation(otherInfo, 0, oid, 1, 1)) &&
 256         oi->which == Z_OtherInfo_characterInfo)
 257         return oi->information.characterInfo;
 258     return 0;
 259 }
 260
 261 const char *Yaz_Proxy::load_balance(const char **url)
 262 {
 263     int zurl_in_use[MAX_ZURL_PLEX];
 264     Yaz_ProxyClient *c;
 265     int i;
 266
 267     for (i = 0; i<MAX_ZURL_PLEX; i++)
 268         zurl_in_use[i] = 0;
 269     for (c = m_parent->m_clientPool; c; c = c->m_next)
 270     {
 271         for (i = 0; url[i]; i++)
 272             if (!strcmp(url[i], c->get_hostname()))
 273                 zurl_in_use[i]++;
 274     }
 275     int min = 100000;
 276     const char *ret = 0;
 277     for (i = 0; url[i]; i++)
 278     {
 279         yaz_log(LOG_DEBUG, "%szurl=%s use=%d",
 280                 m_session_str, url[i], zurl_in_use[i]);
 281         if (min > zurl_in_use[i])
 282         {
 283             ret = url[i];
 284             min = zurl_in_use[i];
 285         }
 286     }
 287     return ret;
 288 }
 289
 290 Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu, const char *cookie,
 291                                        const char *proxy_host)
 292 {
 293     assert (m_parent);
 294     Yaz_Proxy *parent = m_parent;
 295     Z_OtherInformation **oi;
 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)
 587         return;
 588     xmlDocPtr xslt_doc = xmlParseFile(m_stylesheet);
 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     const char *ctype = "text/xml";
 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     int ret = z_soap_codec_enc(o, &soap_package,
 748                                &hres->content_buf, &hres->content_len,
 749                                soap_handlers, 0);
 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)
 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 = 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()
 850 {
 851     Z_SRW_PDU *res = yaz_srw_get(odr_encode(), Z_SRW_explain_response);
 852     Z_SRW_explainResponse *er = res->u.explain_response;
 853
 854     Yaz_ProxyConfig *cfg = check_reconfigure();
 855     if (cfg)
 856     {
 857         int len;
 858         assert (m_proxyTarget);
 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     return send_srw_response(res);
 869 }
 870
 871 int Yaz_Proxy::send_PDU_convert(Z_APDU *apdu, int *len)
 872 {
 873     if (m_http_version)
 874     {
 875         if (apdu->which == Z_APDU_initResponse)
 876         {
 877             Z_InitResponse *res = apdu->u.initResponse;
 878             if (*res->result == 0)
 879             {
 880                 send_to_srw_client_error(3);
 881             }
 882             else if (!m_s2z_search_apdu)
 883             {
 884                 send_srw_explain();
 885             }
 886             else
 887             {
 888                 handle_incoming_Z_PDU(m_s2z_search_apdu);
 889             }
 890         }
 891         else if (m_s2z_search_apdu && apdu->which == Z_APDU_searchResponse)
 892         {
 893             m_s2z_search_apdu = 0;
 894             Z_SearchResponse *res = apdu->u.searchResponse;
 895             m_s2z_hit_count = *res->resultCount;
 896             if (res->records && res->records->which == Z_Records_NSD)
 897             {
 898                 send_to_srw_client_ok(0, res->records, 1);
 899             }
 900             else if (m_s2z_present_apdu)
 901             {
 902                 handle_incoming_Z_PDU(m_s2z_present_apdu);
 903             }
 904             else
 905             {
 906                 send_to_srw_client_ok(m_s2z_hit_count, res->records, 1);
 907             }
 908         }
 909         else if (m_s2z_present_apdu && apdu->which == Z_APDU_presentResponse)
 910         {
 911             int start =
 912                 *m_s2z_present_apdu->u.presentRequest->resultSetStartPoint;
 913
 914             m_s2z_present_apdu = 0;
 915             Z_PresentResponse *res = apdu->u.presentResponse;
 916             send_to_srw_client_ok(m_s2z_hit_count, res->records, start);
 917         }
 918     }
 919     else
 920     {
 921         if (m_log_mask & PROXY_LOG_REQ_CLIENT)
 922             yaz_log (LOG_LOG, "%sSending %s to client", m_session_str,
 923                      apdu_name(apdu));
 924         int r = send_Z_PDU(apdu, len);
 925         logtime();
 926         return r;
 927     }
 928     return 0;
 929 }
 930
 931 int Yaz_Proxy::send_to_client(Z_APDU *apdu)
 932 {
 933     int len = 0;
 934     int kill_session = 0;
 935     if (apdu->which == Z_APDU_searchResponse)
 936     {
 937         Z_SearchResponse *sr = apdu->u.searchResponse;
 938         Z_Records *p = sr->records;
 939         if (p && p->which == Z_Records_NSD)
 940         {
 941             Z_DiagRec dr, *dr_p = &dr;
 942             dr.which = Z_DiagRec_defaultFormat;
 943             dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
 944
 945             *sr->searchStatus = 0;
 946             display_diagrecs(&dr_p, 1);
 947         }
 948         else
 949         {
 950             if (p && p->which == Z_Records_DBOSD)
 951             {
 952                 if (m_marcxml_flag)
 953                     convert_to_marcxml(p->u.databaseOrSurDiagnostics);
 954                 convert_xsl(p->u.databaseOrSurDiagnostics);
 955             }
 956             if (sr->resultCount)
 957             {
 958                 yaz_log(LOG_LOG, "%s%d hits", m_session_str,
 959                         *sr->resultCount);
 960                 if (*sr->resultCount < 0)
 961                 {
 962                     m_invalid_session = 1;
 963                     kill_session = 1;
 964
 965                     *sr->searchStatus = 0;
 966                     sr->records =
 967                         create_nonSurrogateDiagnostics(odr_encode(), 2, 0);
 968                     *sr->resultCount = 0;
 969                 }
 970             }
 971         }
 972     }
 973     else if (apdu->which == Z_APDU_presentResponse)
 974     {
 975         Z_PresentResponse *sr = apdu->u.presentResponse;
 976         Z_Records *p = sr->records;
 977         if (p && p->which == Z_Records_NSD)
 978         {
 979             Z_DiagRec dr, *dr_p = &dr;
 980             dr.which = Z_DiagRec_defaultFormat;
 981             dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
 982             if (*sr->presentStatus == Z_PresentStatus_success)
 983                 *sr->presentStatus = Z_PresentStatus_failure;
 984             display_diagrecs(&dr_p, 1);
 985         }
 986         if (p && p->which == Z_Records_DBOSD)
 987         {
 988             if (m_marcxml_flag)
 989                 convert_to_marcxml(p->u.databaseOrSurDiagnostics);
 990             convert_xsl(p->u.databaseOrSurDiagnostics);
 991         }
 992     }
 993     int r = send_PDU_convert(apdu, &len);
 994     if (r)
 995         return r;
 996     m_bytes_sent += len;
 997     m_bw_stat.add_bytes(len);
 998     if (kill_session)
 999     {
1000         delete m_client;
1001         m_client = 0;
1002         m_parent->pre_init();
1003     }
1004     if (m_http_version)
1005     {
1006         if (!m_http_keepalive)
1007         {
1008 #if 1
1009             timeout(1);
1010 #else
1011             shutdown();
1012             return -1;
1013 #endif
1014         }
1015     }
1016     return r;
1017 }
1018
1019 int Yaz_ProxyClient::send_to_target(Z_APDU *apdu)
1020 {
1021     int len = 0;
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(apdu), 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, &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, &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         if (srw_pdu->which == Z_SRW_searchRetrieve_request)
1570         {
1571             Z_SRW_searchRetrieveRequest *srw_req = srw_pdu->u.request;
1572
1573             // set packing for response records ..
1574             if (srw_req->recordPacking &&
1575                 !strcmp(srw_req->recordPacking, "xml"))
1576                 m_s2z_packing = Z_SRW_recordPacking_XML;
1577             else
1578                 m_s2z_packing = Z_SRW_recordPacking_string;
1579
1580             // prepare search PDU
1581             m_s2z_search_apdu = zget_APDU(m_s2z_odr_search,
1582                                           Z_APDU_searchRequest);
1583             Z_SearchRequest *z_searchRequest =
1584                 m_s2z_search_apdu->u.searchRequest;
1585
1586             z_searchRequest->num_databaseNames = 1;
1587             z_searchRequest->databaseNames = (char**)
1588                 odr_malloc(m_s2z_odr_search, sizeof(char *));
1589             z_searchRequest->databaseNames[0] = odr_strdup(m_s2z_odr_search,
1590                                                            srw_req->database);
1591
1592             // query transformation
1593             Z_Query *query = (Z_Query *)
1594                 odr_malloc(m_s2z_odr_search, sizeof(Z_Query));
1595             z_searchRequest->query = query;
1596
1597             if (srw_req->query_type == Z_SRW_query_type_cql)
1598             {
1599                 Z_External *ext = (Z_External *)
1600                     odr_malloc(m_s2z_odr_search, sizeof(*ext));
1601                 ext->direct_reference =
1602                     odr_getoidbystr(m_s2z_odr_search, "1.2.840.10003.16.2");
1603                 ext->indirect_reference = 0;
1604                 ext->descriptor = 0;
1605                 ext->which = Z_External_CQL;
1606                 ext->u.cql = srw_req->query.cql;
1607
1608                 query->which = Z_Query_type_104;
1609                 query->u.type_104 =  ext;
1610             }
1611             else if (srw_req->query_type == Z_SRW_query_type_pqf)
1612             {
1613                 Z_RPNQuery *RPNquery;
1614                 YAZ_PQF_Parser pqf_parser;
1615
1616                 pqf_parser = yaz_pqf_create ();
1617
1618                 RPNquery = yaz_pqf_parse (pqf_parser, m_s2z_odr_search,
1619                                           srw_req->query.pqf);
1620                 if (!RPNquery)
1621                 {
1622                     const char *pqf_msg;
1623                     size_t off;
1624                     int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
1625                     yaz_log(LOG_LOG, "%*s^\n", off+4, "");
1626                     yaz_log(LOG_LOG, "Bad PQF: %s (code %d)\n", pqf_msg, code);
1627
1628                     send_to_srw_client_error(10);
1629                     return;
1630                 }
1631                 query->which = Z_Query_type_1;
1632                 query->u.type_1 =  RPNquery;
1633
1634                 yaz_pqf_destroy (pqf_parser);
1635             }
1636             else
1637             {
1638                 send_to_srw_client_error(11);
1639                 return;
1640             }
1641
1642             // present
1643             m_s2z_present_apdu = 0;
1644             int max = 0;
1645             if (srw_req->maximumRecords)
1646                 max = *srw_req->maximumRecords;
1647             int start = 1;
1648             if (srw_req->startRecord)
1649                 start = *srw_req->startRecord;
1650             if (max > 0)
1651             {
1652                 // Some backend, such as Voyager doesn't honor piggyback
1653                 // So we use present always (0 &&).
1654                 if (0 && start <= 1)  // Z39.50 piggyback
1655                 {
1656                     *z_searchRequest->smallSetUpperBound = max;
1657                     *z_searchRequest->mediumSetPresentNumber = max;
1658                     *z_searchRequest->largeSetLowerBound = 2000000000; // 2e9
1659
1660                     z_searchRequest->preferredRecordSyntax =
1661                         yaz_oidval_to_z3950oid(m_s2z_odr_search, CLASS_RECSYN,
1662                                                VAL_TEXT_XML);
1663                     if (srw_req->recordSchema)
1664                     {
1665                         z_searchRequest->smallSetElementSetNames =
1666                             z_searchRequest->mediumSetElementSetNames =
1667                             mk_esn_from_schema(m_s2z_odr_search,
1668                                                srw_req->recordSchema);
1669                     }
1670                 }
1671                 else   // Z39.50 present
1672                 {
1673                     m_s2z_present_apdu = zget_APDU(m_s2z_odr_search,
1674                                                    Z_APDU_presentRequest);
1675                     Z_PresentRequest *z_presentRequest =
1676                         m_s2z_present_apdu->u.presentRequest;
1677                     *z_presentRequest->resultSetStartPoint = start;
1678                     *z_presentRequest->numberOfRecordsRequested = max;
1679                     z_presentRequest->preferredRecordSyntax =
1680                         yaz_oidval_to_z3950oid(m_s2z_odr_search, CLASS_RECSYN,
1681                                                VAL_TEXT_XML);
1682                     z_presentRequest->recordComposition =
1683                         (Z_RecordComposition *)
1684                         odr_malloc(m_s2z_odr_search,
1685                                    sizeof(Z_RecordComposition));
1686                     if (srw_req->recordSchema)
1687                     {
1688                         z_presentRequest->recordComposition->which =
1689                             Z_RecordComp_simple;
1690                         z_presentRequest->recordComposition->u.simple =
1691                             mk_esn_from_schema(m_s2z_odr_search,
1692                                                srw_req->recordSchema);
1693                     }
1694                 }
1695             }
1696             if (!m_client)
1697             {
1698                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
1699                                             Z_APDU_initRequest);
1700
1701                 // prevent m_initRequest_apdu memory from being grabbed
1702                 // in Yaz_Proxy::handle_incoming_Z_PDU
1703                 m_initRequest_apdu = m_s2z_init_apdu;
1704                 handle_incoming_Z_PDU(m_s2z_init_apdu);
1705                 return;
1706             }
1707             else
1708             {
1709                 handle_incoming_Z_PDU(m_s2z_search_apdu);
1710                 return;
1711             }
1712         }
1713         else if (srw_pdu->which == Z_SRW_explain_request)
1714         {
1715             Z_SRW_explainRequest *srw_req = srw_pdu->u.explain_request;
1716
1717             if (srw_req->recordPacking &&
1718                 !strcmp(srw_req->recordPacking, "xml"))
1719                 m_s2z_packing = Z_SRW_recordPacking_XML;
1720             else
1721                 m_s2z_packing = Z_SRW_recordPacking_string;
1722
1723             if (!m_client)
1724             {
1725                 yaz_log(LOG_LOG, "handle_incoming: initRequest");
1726                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
1727                                             Z_APDU_initRequest);
1728
1729                 // prevent m_initRequest_apdu memory from being grabbed
1730                 // in Yaz_Proxy::handle_incoming_Z_PDU
1731                 m_initRequest_apdu = m_s2z_init_apdu;
1732                 handle_incoming_Z_PDU(m_s2z_init_apdu);
1733             }
1734             else
1735                 send_srw_explain();
1736             return;
1737         }
1738     }
1739     int len = 0;
1740     Z_GDU *p = z_get_HTTP_Response(odr_encode(), 400);
1741     send_GDU(p, &len);
1742     timeout(1);
1743 }
1744
1745 void Yaz_Proxy::handle_incoming_Z_PDU(Z_APDU *apdu)
1746 {
1747     if (!m_client && m_invalid_session)
1748     {
1749         m_apdu_invalid_session = apdu;
1750         m_mem_invalid_session = odr_extract_mem(odr_decode());
1751         apdu = m_initRequest_apdu;
1752     }
1753
1754     // Determine our client.
1755     Z_OtherInformation **oi;
1756     get_otherInfoAPDU(apdu, &oi);
1757     m_client = get_client(apdu, get_cookie(oi), get_proxy(oi));
1758     if (!m_client)
1759     {
1760         delete this;
1761         return;
1762     }
1763     m_client->m_server = this;
1764
1765     if (apdu->which == Z_APDU_initRequest)
1766     {
1767         if (apdu->u.initRequest->implementationId)
1768             yaz_log(LOG_LOG, "%simplementationId: %s",
1769                     m_session_str, apdu->u.initRequest->implementationId);
1770         if (apdu->u.initRequest->implementationName)
1771             yaz_log(LOG_LOG, "%simplementationName: %s",
1772                     m_session_str, apdu->u.initRequest->implementationName);
1773         if (apdu->u.initRequest->implementationVersion)
1774             yaz_log(LOG_LOG, "%simplementationVersion: %s",
1775                     m_session_str, apdu->u.initRequest->implementationVersion);
1776         if (m_initRequest_apdu == 0)
1777         {
1778             if (m_initRequest_mem)
1779                 nmem_destroy(m_initRequest_mem);
1780             m_initRequest_apdu = apdu;
1781             m_initRequest_mem = odr_extract_mem(odr_decode());
1782         }
1783         if (m_client->m_init_flag)
1784         {
1785             if (handle_init_response_for_invalid_session(apdu))
1786                 return;
1787             Z_APDU *apdu2 = m_client->m_initResponse;
1788             apdu2->u.initResponse->otherInfo = 0;
1789             if (m_client->m_cookie && *m_client->m_cookie)
1790                 set_otherInformationString(apdu2, VAL_COOKIE, 1,
1791                                            m_client->m_cookie);
1792             apdu2->u.initResponse->referenceId =
1793                 apdu->u.initRequest->referenceId;
1794             send_to_client(apdu2);
1795             return;
1796         }
1797         m_client->m_init_flag = 1;
1798     }
1799     handle_max_record_retrieve(apdu);
1800
1801     if (apdu)
1802         apdu = handle_syntax_validation(apdu);
1803
1804     if (apdu)
1805         apdu = handle_query_transformation(apdu);
1806
1807     if (apdu)
1808         apdu = handle_query_validation(apdu);
1809
1810     if (apdu)
1811         apdu = result_set_optimize(apdu);
1812     if (!apdu)
1813     {
1814         m_client->timeout(m_target_idletime);  // mark it active even
1815         // though we didn't use it
1816         return;
1817     }
1818
1819     // delete other info part from PDU before sending to target
1820     get_otherInfoAPDU(apdu, &oi);
1821     if (oi)
1822         *oi = 0;
1823
1824     if (apdu->which == Z_APDU_presentRequest &&
1825         m_client->m_resultSetStartPoint == 0)
1826     {
1827         Z_PresentRequest *pr = apdu->u.presentRequest;
1828         m_client->m_resultSetStartPoint = *pr->resultSetStartPoint;
1829         m_client->m_cache.copy_presentRequest(apdu->u.presentRequest);
1830     } else {
1831         m_client->m_resultSetStartPoint = 0;
1832     }
1833     if (m_client->send_to_target(apdu) < 0)
1834     {
1835         delete m_client;
1836         m_client = 0;
1837         delete this;
1838     }
1839     else
1840         m_client->m_waiting = 1;
1841 }
1842
1843 void Yaz_Proxy::connectNotify()
1844 {
1845 }
1846
1847 void Yaz_Proxy::shutdown()
1848 {
1849     m_invalid_session = 0;
1850     // only keep if keep_alive flag is set...
1851     if (m_client &&
1852         m_client->m_pdu_recv < m_keepalive_limit_pdu &&
1853         m_client->m_bytes_recv+m_client->m_bytes_sent < m_keepalive_limit_bw &&
1854         m_client->m_waiting == 0)
1855     {
1856         yaz_log(LOG_LOG, "%sShutdown (client to proxy) keepalive %s",
1857                  m_session_str,
1858                  m_client->get_hostname());
1859         yaz_log(LOG_LOG, "%sbw=%d pdu=%d limit-bw=%d limit-pdu=%d",
1860                 m_session_str, m_client->m_pdu_recv,
1861                 m_client->m_bytes_sent + m_client->m_bytes_recv,
1862                 m_keepalive_limit_bw, m_keepalive_limit_pdu);
1863         assert (m_client->m_waiting != 2);
1864         // Tell client (if any) that no server connection is there..
1865         m_client->m_server = 0;
1866         m_invalid_session = 0;
1867     }
1868     else if (m_client)
1869     {
1870         yaz_log (LOG_LOG, "%sShutdown (client to proxy) close %s",
1871                  m_session_str,
1872                  m_client->get_hostname());
1873         assert (m_client->m_waiting != 2);
1874         delete m_client;
1875     }
1876     else if (!m_parent)
1877     {
1878         yaz_log (LOG_LOG, "%sshutdown (client to proxy) bad state",
1879                  m_session_str);
1880         assert (m_parent);
1881     }
1882     else
1883     {
1884         yaz_log (LOG_LOG, "%sShutdown (client to proxy)",
1885                  m_session_str);
1886     }
1887     if (m_parent)
1888         m_parent->pre_init();
1889     delete this;
1890 }
1891
1892 const char *Yaz_ProxyClient::get_session_str()
1893 {
1894     if (!m_server)
1895         return "0 ";
1896     return m_server->get_session_str();
1897 }
1898
1899 void Yaz_ProxyClient::shutdown()
1900 {
1901     yaz_log (LOG_LOG, "%sShutdown (proxy to target) %s", get_session_str(),
1902              get_hostname());
1903     delete m_server;
1904     delete this;
1905 }
1906
1907 void Yaz_Proxy::failNotify()
1908 {
1909     inc_request_no();
1910     yaz_log (LOG_LOG, "%sConnection closed by client",
1911              get_session_str());
1912     shutdown();
1913 }
1914
1915 void Yaz_ProxyClient::failNotify()
1916 {
1917     if (m_server)
1918         m_server->inc_request_no();
1919     yaz_log (LOG_LOG, "%sConnection closed by target %s",
1920              get_session_str(), get_hostname());
1921     shutdown();
1922 }
1923
1924 void Yaz_ProxyClient::connectNotify()
1925 {
1926     const char *s = get_session_str();
1927     const char *h = get_hostname();
1928     yaz_log (LOG_LOG, "%sConnection accepted by %s timeout=%d", s, h,
1929              m_target_idletime);
1930     timeout(m_target_idletime);
1931     if (!m_server)
1932         pre_init_client();
1933 }
1934
1935 IYaz_PDU_Observer *Yaz_ProxyClient::sessionNotify(IYaz_PDU_Observable
1936                                                   *the_PDU_Observable, int fd)
1937 {
1938     return new Yaz_ProxyClient(the_PDU_Observable, 0);
1939 }
1940
1941 Yaz_ProxyClient::~Yaz_ProxyClient()
1942 {
1943     if (m_prev)
1944         *m_prev = m_next;
1945     if (m_next)
1946         m_next->m_prev = m_prev;
1947     m_waiting = 2;     // for debugging purposes only.
1948     odr_destroy(m_init_odr);
1949     delete m_last_query;
1950     xfree (m_last_resultSetId);
1951     xfree (m_cookie);
1952 }
1953
1954 void Yaz_ProxyClient::pre_init_client()
1955 {
1956     Z_APDU *apdu = create_Z_PDU(Z_APDU_initRequest);
1957     Z_InitRequest *req = apdu->u.initRequest;
1958
1959     ODR_MASK_SET(req->options, Z_Options_search);
1960     ODR_MASK_SET(req->options, Z_Options_present);
1961     ODR_MASK_SET(req->options, Z_Options_namedResultSets);
1962     ODR_MASK_SET(req->options, Z_Options_triggerResourceCtrl);
1963     ODR_MASK_SET(req->options, Z_Options_scan);
1964     ODR_MASK_SET(req->options, Z_Options_sort);
1965     ODR_MASK_SET(req->options, Z_Options_extendedServices);
1966     ODR_MASK_SET(req->options, Z_Options_delSet);
1967
1968     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_1);
1969     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_2);
1970     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_3);
1971
1972     if (send_to_target(apdu) < 0)
1973     {
1974         delete this;
1975     }
1976     else
1977     {
1978         m_waiting = 1;
1979         m_init_flag = 1;
1980     }
1981 }
1982
1983 void Yaz_Proxy::pre_init()
1984 {
1985     int i;
1986     const char *name = 0;
1987     const char *zurl_in_use[MAX_ZURL_PLEX];
1988     int limit_bw, limit_pdu, limit_req;
1989     int target_idletime, client_idletime;
1990     int max_clients;
1991     int keepalive_limit_bw, keepalive_limit_pdu;
1992     int pre_init;
1993     const char *cql2rpn = 0;
1994     const char *zeerex = 0;
1995
1996     Yaz_ProxyConfig *cfg = check_reconfigure();
1997
1998     zurl_in_use[0] = 0;
1999
2000     if (m_log_mask & PROXY_LOG_APDU_CLIENT)
2001         set_APDU_yazlog(1);
2002     else
2003         set_APDU_yazlog(0);
2004
2005     for (i = 0; cfg && cfg->get_target_no(i, &name, zurl_in_use,
2006                                           &limit_bw, &limit_pdu, &limit_req,
2007                                           &target_idletime, &client_idletime,
2008                                           &max_clients,
2009                                           &keepalive_limit_bw,
2010                                           &keepalive_limit_pdu,
2011                                           &pre_init,
2012                                           &cql2rpn) ; i++)
2013     {
2014         if (pre_init)
2015         {
2016             int j;
2017             for (j = 0; zurl_in_use[j]; j++)
2018             {
2019                 Yaz_ProxyClient *c;
2020                 int spare = 0;
2021                 int in_use = 0;
2022                 int other = 0;
2023                 for (c = m_clientPool; c; c = c->m_next)
2024                 {
2025                     if (!strcmp(zurl_in_use[j], c->get_hostname()))
2026                     {
2027                         if (c->m_cookie == 0)
2028                         {
2029                             if (c->m_server == 0)
2030                                 spare++;
2031                             else
2032                                 in_use++;
2033                         }
2034                         else
2035                             other++;
2036                     }
2037                 }
2038                 yaz_log(LOG_LOG, "%spre-init %s %s use=%d other=%d spare=%d "
2039                         "preinit=%d",m_session_str,
2040                         name, zurl_in_use[j], in_use, other, spare, pre_init);
2041                 if (spare < pre_init)
2042                 {
2043                     c = new Yaz_ProxyClient(m_PDU_Observable->clone(), this);
2044                     c->m_next = m_clientPool;
2045                     if (c->m_next)
2046                         c->m_next->m_prev = &c->m_next;
2047                     m_clientPool = c;
2048                     c->m_prev = &m_clientPool;
2049
2050                     if (m_log_mask & PROXY_LOG_APDU_SERVER)
2051                         c->set_APDU_yazlog(1);
2052                     else
2053                         c->set_APDU_yazlog(0);
2054
2055                     if (c->client(zurl_in_use[j]))
2056                     {
2057                         timeout(60);
2058                         delete c;
2059                         return;
2060                     }
2061                     c->timeout(30);
2062                     c->m_waiting = 1;
2063                     c->m_target_idletime = target_idletime;
2064                     c->m_seqno = m_seqno++;
2065                 }
2066             }
2067         }
2068     }
2069 }
2070
2071 void Yaz_Proxy::timeoutNotify()
2072 {
2073     if (m_parent)
2074     {
2075         if (m_bw_hold_PDU)
2076         {
2077             timeout(m_client_idletime);
2078             Z_GDU *apdu = m_bw_hold_PDU;
2079             m_bw_hold_PDU = 0;
2080
2081             if (apdu->which == Z_GDU_Z3950)
2082                 handle_incoming_Z_PDU(apdu->u.z3950);
2083             else if (apdu->which == Z_GDU_HTTP_Request)
2084                 handle_incoming_HTTP(apdu->u.HTTP_Request);
2085         }
2086         else
2087         {
2088             inc_request_no();
2089
2090             yaz_log (LOG_LOG, "%sTimeout (client to proxy)", m_session_str);
2091             shutdown();
2092         }
2093     }
2094     else
2095     {
2096         timeout(600);
2097         pre_init();
2098     }
2099 }
2100
2101 void Yaz_ProxyClient::timeoutNotify()
2102 {
2103     if (m_server)
2104         m_server->inc_request_no();
2105
2106     yaz_log (LOG_LOG, "%sTimeout (proxy to target) %s", get_session_str(),
2107              get_hostname());
2108     m_waiting = 1;
2109     m_root->pre_init();
2110     shutdown();
2111 }
2112
2113 Yaz_ProxyClient::Yaz_ProxyClient(IYaz_PDU_Observable *the_PDU_Observable,
2114                                  Yaz_Proxy *parent) :
2115     Yaz_Z_Assoc (the_PDU_Observable)
2116 {
2117     m_cookie = 0;
2118     m_next = 0;
2119     m_prev = 0;
2120     m_init_flag = 0;
2121     m_last_query = 0;
2122     m_last_resultSetId = 0;
2123     m_last_resultCount = 0;
2124     m_last_ok = 0;
2125     m_sr_transform = 0;
2126     m_waiting = 0;
2127     m_init_odr = odr_createmem (ODR_DECODE);
2128     m_initResponse = 0;
2129     m_resultSetStartPoint = 0;
2130     m_bytes_sent = m_bytes_recv = 0;
2131     m_pdu_recv = 0;
2132     m_server = 0;
2133     m_seqno = 0;
2134     m_target_idletime = 600;
2135     m_root = parent;
2136 }
2137
2138 const char *Yaz_Proxy::option(const char *name, const char *value)
2139 {
2140     if (!strcmp (name, "optimize")) {
2141         if (value) {
2142             xfree (m_optimize);
2143             m_optimize = xstrdup (value);
2144         }
2145         return m_optimize;
2146     }
2147     return 0;
2148 }
2149
2150 void Yaz_ProxyClient::recv_HTTP_response(Z_HTTP_Response *apdu, int len)
2151 {
2152
2153 }
2154
2155 void Yaz_ProxyClient::recv_GDU(Z_GDU *apdu, int len)
2156 {
2157     if (apdu->which == Z_GDU_Z3950)
2158         recv_Z_PDU(apdu->u.z3950, len);
2159     else if (apdu->which == Z_GDU_HTTP_Response)
2160         recv_HTTP_response(apdu->u.HTTP_Response, len);
2161     else
2162         shutdown();
2163 }
2164
2165 int Yaz_Proxy::handle_init_response_for_invalid_session(Z_APDU *apdu)
2166 {
2167     if (!m_invalid_session)
2168         return 0;
2169     m_invalid_session = 0;
2170     handle_incoming_Z_PDU(m_apdu_invalid_session);
2171     assert (m_mem_invalid_session);
2172     nmem_destroy(m_mem_invalid_session);
2173     m_mem_invalid_session = 0;
2174     return 1;
2175 }
2176
2177 void Yaz_ProxyClient::recv_Z_PDU(Z_APDU *apdu, int len)
2178 {
2179     m_bytes_recv += len;
2180     m_pdu_recv++;
2181     m_waiting = 0;
2182     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
2183         yaz_log (LOG_LOG, "%sReceiving %s from %s %d bytes", get_session_str(),
2184                  apdu_name(apdu), get_hostname(), len);
2185     if (apdu->which == Z_APDU_initResponse)
2186     {
2187         if (!m_server)  // if this is a pre init session , check for more
2188             m_root->pre_init();
2189         NMEM nmem = odr_extract_mem (odr_decode());
2190         odr_reset (m_init_odr);
2191         nmem_transfer (m_init_odr->mem, nmem);
2192         m_initResponse = apdu;
2193
2194         Z_InitResponse *ir = apdu->u.initResponse;
2195         char *im0 = ir->implementationName;
2196
2197         char *im1 = (char*)
2198             odr_malloc(m_init_odr, 20 + (im0 ? strlen(im0) : 0));
2199         *im1 = '\0';
2200         if (im0)
2201         {
2202             strcat(im1, im0);
2203             strcat(im1, " ");
2204         }
2205         strcat(im1, "(YAZ Proxy)");
2206         ir->implementationName = im1;
2207
2208         nmem_destroy (nmem);
2209
2210         if (m_server && m_server->handle_init_response_for_invalid_session(apdu))
2211             return;
2212     }
2213     if (apdu->which == Z_APDU_searchResponse)
2214     {
2215         Z_SearchResponse *sr = apdu->u.searchResponse;
2216         m_last_resultCount = *sr->resultCount;
2217         int status = *sr->searchStatus;
2218         if (status && (!sr->records || sr->records->which == Z_Records_DBOSD))
2219         {
2220             m_last_ok = 1;
2221
2222             if (sr->records && sr->records->which == Z_Records_DBOSD)
2223             {
2224                 m_cache.add(odr_decode(),
2225                             sr->records->u.databaseOrSurDiagnostics, 1,
2226                             *sr->resultCount);
2227             }
2228         }
2229     }
2230     if (apdu->which == Z_APDU_presentResponse)
2231     {
2232         Z_PresentResponse *pr = apdu->u.presentResponse;
2233         if (m_sr_transform)
2234         {
2235             m_sr_transform = 0;
2236             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
2237             Z_SearchResponse *sr = new_apdu->u.searchResponse;
2238             sr->referenceId = pr->referenceId;
2239             *sr->resultCount = m_last_resultCount;
2240             sr->records = pr->records;
2241             sr->nextResultSetPosition = pr->nextResultSetPosition;
2242             sr->numberOfRecordsReturned = pr->numberOfRecordsReturned;
2243             apdu = new_apdu;
2244         }
2245         if (pr->records &&
2246             pr->records->which == Z_Records_DBOSD && m_resultSetStartPoint)
2247         {
2248             m_cache.add(odr_decode(),
2249                         pr->records->u.databaseOrSurDiagnostics,
2250                         m_resultSetStartPoint, -1);
2251             m_resultSetStartPoint = 0;
2252         }
2253     }
2254     if (m_cookie)
2255         set_otherInformationString (apdu, VAL_COOKIE, 1, m_cookie);
2256     if (m_server)
2257     {
2258         m_server->send_to_client(apdu);
2259     }
2260     if (apdu->which == Z_APDU_close)
2261     {
2262         shutdown();
2263     }
2264 }
2265
2266 int Yaz_Proxy::server(const char *addr)
2267 {
2268     int r = Yaz_Z_Assoc::server(addr);
2269     if (!r)
2270     {
2271         yaz_log(LOG_LOG, "%sStarted proxy " VERSION " on %s", m_session_str, addr);
2272         timeout(1);
2273     }
2274     return r;
2275 }
2276