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 1.79 2004-01-07 11:37:45 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     const char *apdu_name_tmp = apdu_name(apdu);
1023     int r = send_Z_PDU(apdu, &len);
1024     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
1025         yaz_log (LOG_LOG, "%sSending %s to %s %d bytes",
1026                  get_session_str(),
1027                  apdu_name_tmp, get_hostname(), len);
1028     m_bytes_sent += len;
1029     return r;
1030 }
1031
1032 Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
1033 {
1034     if (apdu->which == Z_APDU_presentRequest)
1035     {
1036         Z_PresentRequest *pr = apdu->u.presentRequest;
1037         int toget = *pr->numberOfRecordsRequested;
1038         int start = *pr->resultSetStartPoint;
1039
1040         yaz_log(LOG_LOG, "%sPresent %s %d+%d", m_session_str,
1041                 pr->resultSetId, start, toget);
1042
1043         if (*m_parent->m_optimize == '0')
1044             return apdu;
1045
1046         if (!m_client->m_last_resultSetId)
1047         {
1048             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1049             new_apdu->u.presentResponse->records =
1050                 create_nonSurrogateDiagnostics(odr_encode(), 30,
1051                                                pr->resultSetId);
1052             send_to_client(new_apdu);
1053             return 0;
1054         }
1055         if (!strcmp(m_client->m_last_resultSetId, pr->resultSetId))
1056         {
1057             if (start+toget-1 > m_client->m_last_resultCount)
1058             {
1059                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1060                 new_apdu->u.presentResponse->records =
1061                     create_nonSurrogateDiagnostics(odr_encode(), 13, 0);
1062                 send_to_client(new_apdu);
1063                 return 0;
1064             }
1065             Z_NamePlusRecordList *npr;
1066             if (m_client->m_cache.lookup (odr_encode(), &npr, start, toget,
1067                                           pr->preferredRecordSyntax,
1068                                           pr->recordComposition))
1069             {
1070                 yaz_log (LOG_LOG, "%sReturned cached records for present request",
1071                          m_session_str);
1072                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1073                 new_apdu->u.presentResponse->referenceId = pr->referenceId;
1074
1075                 new_apdu->u.presentResponse->numberOfRecordsReturned
1076                     = odr_intdup(odr_encode(), toget);
1077
1078                 new_apdu->u.presentResponse->records = (Z_Records*)
1079                     odr_malloc(odr_encode(), sizeof(Z_Records));
1080                 new_apdu->u.presentResponse->records->which = Z_Records_DBOSD;
1081                 new_apdu->u.presentResponse->records->u.databaseOrSurDiagnostics = npr;
1082                 new_apdu->u.presentResponse->nextResultSetPosition =
1083                     odr_intdup(odr_encode(), start+toget);
1084
1085                 send_to_client(new_apdu);
1086                 return 0;
1087             }
1088         }
1089     }
1090
1091     if (apdu->which != Z_APDU_searchRequest)
1092         return apdu;
1093     Z_SearchRequest *sr = apdu->u.searchRequest;
1094     Yaz_Z_Query *this_query = new Yaz_Z_Query;
1095     Yaz_Z_Databases this_databases;
1096
1097     this_databases.set(sr->num_databaseNames, (const char **)
1098                        sr->databaseNames);
1099
1100     this_query->set_Z_Query(sr->query);
1101
1102     char query_str[120];
1103     this_query->print(query_str, sizeof(query_str)-1);
1104     yaz_log(LOG_LOG, "%sSearch %s", m_session_str, query_str);
1105
1106     if (*m_parent->m_optimize != '0' &&
1107         m_client->m_last_ok && m_client->m_last_query &&
1108         m_client->m_last_query->match(this_query) &&
1109         !strcmp(m_client->m_last_resultSetId, sr->resultSetName) &&
1110         m_client->m_last_databases.match(this_databases))
1111     {
1112         delete this_query;
1113         if (m_client->m_last_resultCount > *sr->smallSetUpperBound &&
1114             m_client->m_last_resultCount < *sr->largeSetLowerBound)
1115         {
1116             Z_NamePlusRecordList *npr;
1117             int toget = *sr->mediumSetPresentNumber;
1118             Z_RecordComposition *comp = 0;
1119
1120             if (toget > m_client->m_last_resultCount)
1121                 toget = m_client->m_last_resultCount;
1122
1123             if (sr->mediumSetElementSetNames)
1124             {
1125                 comp = (Z_RecordComposition *)
1126                     odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
1127                 comp->which = Z_RecordComp_simple;
1128                 comp->u.simple = sr->mediumSetElementSetNames;
1129             }
1130
1131             if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
1132                                           sr->preferredRecordSyntax, comp))
1133             {
1134                 yaz_log (LOG_LOG, "%sReturned cached records for medium set",
1135                          m_session_str);
1136                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1137                 new_apdu->u.searchResponse->referenceId = sr->referenceId;
1138                 new_apdu->u.searchResponse->resultCount =
1139                     &m_client->m_last_resultCount;
1140
1141                 new_apdu->u.searchResponse->numberOfRecordsReturned
1142                     = odr_intdup(odr_encode(), toget);
1143
1144                 new_apdu->u.searchResponse->presentStatus =
1145                     odr_intdup(odr_encode(), Z_PresentStatus_success);
1146                 new_apdu->u.searchResponse->records = (Z_Records*)
1147                     odr_malloc(odr_encode(), sizeof(Z_Records));
1148                 new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
1149                 new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
1150                 new_apdu->u.searchResponse->nextResultSetPosition =
1151                     odr_intdup(odr_encode(), toget+1);
1152                 send_to_client(new_apdu);
1153                 return 0;
1154             }
1155             else
1156             {
1157                 // medium Set
1158                 // send present request (medium size)
1159                 yaz_log (LOG_LOG, "%sOptimizing search for medium set",
1160                          m_session_str);
1161
1162                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
1163                 Z_PresentRequest *pr = new_apdu->u.presentRequest;
1164                 pr->referenceId = sr->referenceId;
1165                 pr->resultSetId = sr->resultSetName;
1166                 pr->preferredRecordSyntax = sr->preferredRecordSyntax;
1167                 *pr->numberOfRecordsRequested = toget;
1168                 pr->recordComposition = comp;
1169                 m_client->m_sr_transform = 1;
1170                 return new_apdu;
1171             }
1172         }
1173         else if (m_client->m_last_resultCount >= *sr->largeSetLowerBound ||
1174             m_client->m_last_resultCount <= 0)
1175         {
1176             // large set. Return pseudo-search response immediately
1177             yaz_log (LOG_LOG, "%sOptimizing search for large set",
1178                      m_session_str);
1179             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1180             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1181             new_apdu->u.searchResponse->resultCount =
1182                 &m_client->m_last_resultCount;
1183             send_to_client(new_apdu);
1184             return 0;
1185         }
1186         else
1187         {
1188             Z_NamePlusRecordList *npr;
1189             int toget = m_client->m_last_resultCount;
1190             Z_RecordComposition *comp = 0;
1191             // small set
1192             // send a present request (small set)
1193
1194             if (sr->smallSetElementSetNames)
1195             {
1196                 comp = (Z_RecordComposition *)
1197                     odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
1198                 comp->which = Z_RecordComp_simple;
1199                 comp->u.simple = sr->smallSetElementSetNames;
1200             }
1201
1202             if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
1203                                           sr->preferredRecordSyntax, comp))
1204             {
1205                 yaz_log (LOG_LOG, "%sReturned cached records for small set",
1206                          m_session_str);
1207                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1208                 new_apdu->u.searchResponse->referenceId = sr->referenceId;
1209                 new_apdu->u.searchResponse->resultCount =
1210                     &m_client->m_last_resultCount;
1211
1212                 new_apdu->u.searchResponse->numberOfRecordsReturned
1213                     = odr_intdup(odr_encode(), toget);
1214
1215                 new_apdu->u.searchResponse->presentStatus =
1216                     odr_intdup(odr_encode(), Z_PresentStatus_success);
1217                 new_apdu->u.searchResponse->records = (Z_Records*)
1218                     odr_malloc(odr_encode(), sizeof(Z_Records));
1219                 new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
1220                 new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
1221                 new_apdu->u.searchResponse->nextResultSetPosition =
1222                     odr_intdup(odr_encode(), toget+1);
1223                 send_to_client(new_apdu);
1224                 return 0;
1225             }
1226             else
1227             {
1228                 yaz_log (LOG_LOG, "%sOptimizing search for small set",
1229                          m_session_str);
1230                 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
1231                 Z_PresentRequest *pr = new_apdu->u.presentRequest;
1232                 pr->referenceId = sr->referenceId;
1233                 pr->resultSetId = sr->resultSetName;
1234                 pr->preferredRecordSyntax = sr->preferredRecordSyntax;
1235                 *pr->numberOfRecordsRequested = toget;
1236                 pr->recordComposition = comp;
1237                 m_client->m_sr_transform = 1;
1238                 return new_apdu;
1239             }
1240         }
1241     }
1242     else  // query doesn't match
1243     {
1244         delete m_client->m_last_query;
1245         m_client->m_last_query = this_query;
1246         m_client->m_last_ok = 0;
1247         m_client->m_cache.clear();
1248         m_client->m_resultSetStartPoint = 0;
1249
1250         xfree (m_client->m_last_resultSetId);
1251         m_client->m_last_resultSetId = xstrdup (sr->resultSetName);
1252
1253         m_client->m_last_databases.set(sr->num_databaseNames,
1254                                        (const char **) sr->databaseNames);
1255     }
1256     return apdu;
1257 }
1258
1259
1260 void Yaz_Proxy::inc_request_no()
1261 {
1262     char *cp = strchr(m_session_str, ' ');
1263     m_request_no++;
1264     if (cp)
1265         sprintf(cp+1, "%d ", m_request_no);
1266 }
1267
1268 void Yaz_Proxy::recv_GDU(Z_GDU *apdu, int len)
1269 {
1270     inc_request_no();
1271
1272     m_bytes_recv += len;
1273
1274     if (m_log_mask & PROXY_LOG_APDU_CLIENT)
1275         yaz_log (LOG_DEBUG, "%sReceiving %s from client %d bytes",
1276                  m_session_str, gdu_name(apdu), len);
1277
1278     if (m_bw_hold_PDU)     // double incoming PDU. shutdown now.
1279         shutdown();
1280
1281     m_bw_stat.add_bytes(len);
1282     m_pdu_stat.add_bytes(1);
1283
1284     gettimeofday(&m_time_tv, 0);
1285
1286     int bw_total = m_bw_stat.get_total();
1287     int pdu_total = m_pdu_stat.get_total();
1288
1289     int reduce = 0;
1290     if (m_bw_max)
1291     {
1292         if (bw_total > m_bw_max)
1293         {
1294             reduce = (bw_total/m_bw_max);
1295         }
1296     }
1297     if (m_pdu_max)
1298     {
1299         if (pdu_total > m_pdu_max)
1300         {
1301             int nreduce = (m_pdu_max >= 60) ? 1 : 60/m_pdu_max;
1302             reduce = (reduce > nreduce) ? reduce : nreduce;
1303         }
1304     }
1305     if (reduce)
1306     {
1307         yaz_log(LOG_LOG, "%sdelay=%d bw=%d pdu=%d limit-bw=%d limit-pdu=%d",
1308                 m_session_str, reduce, bw_total, pdu_total,
1309                 m_bw_max, m_pdu_max);
1310
1311         m_bw_hold_PDU = apdu;  // save PDU and signal "on hold"
1312         timeout(reduce);       // call us reduce seconds later
1313     }
1314     else if (apdu->which == Z_GDU_Z3950)
1315         handle_incoming_Z_PDU(apdu->u.z3950);
1316     else if (apdu->which == Z_GDU_HTTP_Request)
1317         handle_incoming_HTTP(apdu->u.HTTP_Request);
1318 }
1319
1320 void Yaz_Proxy::handle_max_record_retrieve(Z_APDU *apdu)
1321 {
1322     if (m_max_record_retrieve)
1323     {
1324         if (apdu->which == Z_APDU_presentRequest)
1325         {
1326             Z_PresentRequest *pr = apdu->u.presentRequest;
1327             if (pr->numberOfRecordsRequested &&
1328                 *pr->numberOfRecordsRequested > m_max_record_retrieve)
1329                 *pr->numberOfRecordsRequested = m_max_record_retrieve;
1330         }
1331     }
1332 }
1333
1334 Z_Records *Yaz_Proxy::create_nonSurrogateDiagnostics(ODR odr,
1335                                                      int error,
1336                                                      const char *addinfo)
1337 {
1338     Z_Records *rec = (Z_Records *)
1339         odr_malloc (odr, sizeof(*rec));
1340     int *err = (int *)
1341         odr_malloc (odr, sizeof(*err));
1342     Z_DiagRec *drec = (Z_DiagRec *)
1343         odr_malloc (odr, sizeof(*drec));
1344     Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
1345         odr_malloc (odr, sizeof(*dr));
1346     *err = error;
1347     rec->which = Z_Records_NSD;
1348     rec->u.nonSurrogateDiagnostic = dr;
1349     dr->diagnosticSetId =
1350         yaz_oidval_to_z3950oid (odr, CLASS_DIAGSET, VAL_BIB1);
1351     dr->condition = err;
1352     dr->which = Z_DefaultDiagFormat_v2Addinfo;
1353     dr->u.v2Addinfo = odr_strdup (odr, addinfo ? addinfo : "");
1354     return rec;
1355 }
1356
1357 Z_APDU *Yaz_Proxy::handle_query_transformation(Z_APDU *apdu)
1358 {
1359     if (apdu->which == Z_APDU_searchRequest &&
1360         apdu->u.searchRequest->query &&
1361         apdu->u.searchRequest->query->which == Z_Query_type_104 &&
1362         apdu->u.searchRequest->query->u.type_104->which == Z_External_CQL)
1363     {
1364         Z_RPNQuery *rpnquery = 0;
1365         Z_SearchRequest *sr = apdu->u.searchRequest;
1366         char *addinfo = 0;
1367
1368         yaz_log(LOG_LOG, "%sCQL: %s", m_session_str,
1369                 sr->query->u.type_104->u.cql);
1370
1371         int r = m_cql2rpn.query_transform(sr->query->u.type_104->u.cql,
1372                                           &rpnquery, odr_encode(),
1373                                           &addinfo);
1374         if (r == -3)
1375             yaz_log(LOG_LOG, "%sNo CQL to RPN table", m_session_str);
1376         else if (r)
1377         {
1378             yaz_log(LOG_LOG, "%sCQL Conversion error %d", m_session_str, r);
1379             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1380
1381             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1382             new_apdu->u.searchResponse->records =
1383                 create_nonSurrogateDiagnostics(odr_encode(),
1384                                                yaz_diag_srw_to_bib1(r),
1385                                                addinfo);
1386             *new_apdu->u.searchResponse->searchStatus = 0;
1387
1388             send_to_client(new_apdu);
1389
1390             return 0;
1391         }
1392         else
1393         {
1394             sr->query->which = Z_Query_type_1;
1395             sr->query->u.type_1 = rpnquery;
1396         }
1397         return apdu;
1398     }
1399     return apdu;
1400 }
1401
1402 Z_APDU *Yaz_Proxy::handle_query_validation(Z_APDU *apdu)
1403 {
1404     if (apdu->which == Z_APDU_searchRequest)
1405     {
1406         Z_SearchRequest *sr = apdu->u.searchRequest;
1407         int err = 0;
1408         char *addinfo = 0;
1409
1410         Yaz_ProxyConfig *cfg = check_reconfigure();
1411         if (cfg)
1412             err = cfg->check_query(odr_encode(), m_default_target,
1413                                    sr->query, &addinfo);
1414         if (err)
1415         {
1416             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1417
1418             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1419             new_apdu->u.searchResponse->records =
1420                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
1421             *new_apdu->u.searchResponse->searchStatus = 0;
1422
1423             send_to_client(new_apdu);
1424
1425             return 0;
1426         }
1427     }
1428     return apdu;
1429 }
1430
1431 Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
1432 {
1433     m_marcxml_flag = 0;
1434     if (apdu->which == Z_APDU_searchRequest)
1435     {
1436         Z_SearchRequest *sr = apdu->u.searchRequest;
1437         int err = 0;
1438         char *addinfo = 0;
1439         Yaz_ProxyConfig *cfg = check_reconfigure();
1440
1441         Z_RecordComposition rc_temp, *rc = 0;
1442         if (sr->smallSetElementSetNames)
1443         {
1444             rc_temp.which = Z_RecordComp_simple;
1445             rc_temp.u.simple = sr->smallSetElementSetNames;
1446             rc = &rc_temp;
1447         }
1448
1449         if (cfg)
1450             err = cfg->check_syntax(odr_encode(),
1451                                     m_default_target,
1452                                     sr->preferredRecordSyntax, rc,
1453                                     &addinfo, &m_stylesheet, &m_schema);
1454         if (err == -1)
1455         {
1456             sr->preferredRecordSyntax =
1457                 yaz_oidval_to_z3950oid(odr_encode(), CLASS_RECSYN, VAL_USMARC);
1458             m_marcxml_flag = 1;
1459         }
1460         else if (err)
1461         {
1462             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1463
1464             new_apdu->u.searchResponse->referenceId = sr->referenceId;
1465             new_apdu->u.searchResponse->records =
1466                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
1467             *new_apdu->u.searchResponse->searchStatus = 0;
1468
1469             send_to_client(new_apdu);
1470
1471             return 0;
1472         }
1473     }
1474     else if (apdu->which == Z_APDU_presentRequest)
1475     {
1476         Z_PresentRequest *pr = apdu->u.presentRequest;
1477         int err = 0;
1478         char *addinfo = 0;
1479         Yaz_ProxyConfig *cfg = check_reconfigure();
1480
1481         if (cfg)
1482             err = cfg->check_syntax(odr_encode(), m_default_target,
1483                                     pr->preferredRecordSyntax,
1484                                     pr->recordComposition,
1485                                     &addinfo, &m_stylesheet, &m_schema);
1486         if (err == -1)
1487         {
1488             pr->preferredRecordSyntax =
1489                 yaz_oidval_to_z3950oid(odr_decode(), CLASS_RECSYN, VAL_USMARC);
1490             m_marcxml_flag = 1;
1491         }
1492         else if (err)
1493         {
1494             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
1495
1496             new_apdu->u.presentResponse->referenceId = pr->referenceId;
1497             new_apdu->u.presentResponse->records =
1498                 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
1499             *new_apdu->u.presentResponse->presentStatus =
1500                 Z_PresentStatus_failure;
1501
1502             send_to_client(new_apdu);
1503
1504             return 0;
1505         }
1506     }
1507     return apdu;
1508 }
1509
1510 Z_ElementSetNames *Yaz_Proxy::mk_esn_from_schema(ODR o, const char *schema)
1511 {
1512     if (!schema)
1513         return 0;
1514     Z_ElementSetNames *esn = (Z_ElementSetNames *)
1515         odr_malloc(o, sizeof(Z_ElementSetNames));
1516     esn->which = Z_ElementSetNames_generic;
1517     esn->u.generic = odr_strdup(o, schema);
1518     return esn;
1519 }
1520
1521 void Yaz_Proxy::handle_incoming_HTTP(Z_HTTP_Request *hreq)
1522 {
1523
1524     if (m_s2z_odr_init)
1525     {
1526         odr_destroy(m_s2z_odr_init);
1527         m_s2z_odr_init = 0;
1528     }
1529     if (m_s2z_odr_search)
1530     {
1531         odr_destroy(m_s2z_odr_search);
1532         m_s2z_odr_search = 0;
1533     }
1534
1535     m_http_keepalive = 0;
1536     m_http_version = 0;
1537     if (!strcmp(hreq->version, "1.0"))
1538     {
1539         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1540         if (v && !strcmp(v, "Keep-Alive"))
1541             m_http_keepalive = 1;
1542         else
1543             m_http_keepalive = 0;
1544         m_http_version = "1.0";
1545     }
1546     else
1547     {
1548         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1549         if (v && !strcmp(v, "close"))
1550             m_http_keepalive = 0;
1551         else
1552             m_http_keepalive = 1;
1553         m_http_version = "1.1";
1554     }
1555
1556     Z_SRW_PDU *srw_pdu = 0;
1557     Z_SOAP *soap_package = 0;
1558     char *charset = 0;
1559     if (yaz_srw_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
1560                        &charset) == 0
1561         || yaz_sru_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
1562                           &charset) == 0)
1563     {
1564         m_s2z_odr_init = odr_createmem(ODR_ENCODE);
1565         m_s2z_odr_search = odr_createmem(ODR_ENCODE);
1566         m_soap_ns = odr_strdup(m_s2z_odr_search, soap_package->ns);
1567         m_s2z_init_apdu = 0;
1568         m_s2z_search_apdu = 0;
1569         m_s2z_present_apdu = 0;
1570         if (srw_pdu->which == Z_SRW_searchRetrieve_request)
1571         {
1572             Z_SRW_searchRetrieveRequest *srw_req = srw_pdu->u.request;
1573
1574             // set packing for response records ..
1575             if (srw_req->recordPacking &&
1576                 !strcmp(srw_req->recordPacking, "xml"))
1577                 m_s2z_packing = Z_SRW_recordPacking_XML;
1578             else
1579                 m_s2z_packing = Z_SRW_recordPacking_string;
1580
1581             // prepare search PDU
1582             m_s2z_search_apdu = zget_APDU(m_s2z_odr_search,
1583                                           Z_APDU_searchRequest);
1584             Z_SearchRequest *z_searchRequest =
1585                 m_s2z_search_apdu->u.searchRequest;
1586
1587             z_searchRequest->num_databaseNames = 1;
1588             z_searchRequest->databaseNames = (char**)
1589                 odr_malloc(m_s2z_odr_search, sizeof(char *));
1590             z_searchRequest->databaseNames[0] = odr_strdup(m_s2z_odr_search,
1591                                                            srw_req->database);
1592
1593             // query transformation
1594             Z_Query *query = (Z_Query *)
1595                 odr_malloc(m_s2z_odr_search, sizeof(Z_Query));
1596             z_searchRequest->query = query;
1597
1598             if (srw_req->query_type == Z_SRW_query_type_cql)
1599             {
1600                 Z_External *ext = (Z_External *)
1601                     odr_malloc(m_s2z_odr_search, sizeof(*ext));
1602                 ext->direct_reference =
1603                     odr_getoidbystr(m_s2z_odr_search, "1.2.840.10003.16.2");
1604                 ext->indirect_reference = 0;
1605                 ext->descriptor = 0;
1606                 ext->which = Z_External_CQL;
1607                 ext->u.cql = srw_req->query.cql;
1608
1609                 query->which = Z_Query_type_104;
1610                 query->u.type_104 =  ext;
1611             }
1612             else if (srw_req->query_type == Z_SRW_query_type_pqf)
1613             {
1614                 Z_RPNQuery *RPNquery;
1615                 YAZ_PQF_Parser pqf_parser;
1616
1617                 pqf_parser = yaz_pqf_create ();
1618
1619                 RPNquery = yaz_pqf_parse (pqf_parser, m_s2z_odr_search,
1620                                           srw_req->query.pqf);
1621                 if (!RPNquery)
1622                 {
1623                     const char *pqf_msg;
1624                     size_t off;
1625                     int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
1626                     yaz_log(LOG_LOG, "%*s^\n", off+4, "");
1627                     yaz_log(LOG_LOG, "Bad PQF: %s (code %d)\n", pqf_msg, code);
1628
1629                     send_to_srw_client_error(10);
1630                     return;
1631                 }
1632                 query->which = Z_Query_type_1;
1633                 query->u.type_1 =  RPNquery;
1634
1635                 yaz_pqf_destroy (pqf_parser);
1636             }
1637             else
1638             {
1639                 send_to_srw_client_error(11);
1640                 return;
1641             }
1642
1643             // present
1644             m_s2z_present_apdu = 0;
1645             int max = 0;
1646             if (srw_req->maximumRecords)
1647                 max = *srw_req->maximumRecords;
1648             int start = 1;
1649             if (srw_req->startRecord)
1650                 start = *srw_req->startRecord;
1651             if (max > 0)
1652             {
1653                 // Some backend, such as Voyager doesn't honor piggyback
1654                 // So we use present always (0 &&).
1655                 if (0 && start <= 1)  // Z39.50 piggyback
1656                 {
1657                     *z_searchRequest->smallSetUpperBound = max;
1658                     *z_searchRequest->mediumSetPresentNumber = max;
1659                     *z_searchRequest->largeSetLowerBound = 2000000000; // 2e9
1660
1661                     z_searchRequest->preferredRecordSyntax =
1662                         yaz_oidval_to_z3950oid(m_s2z_odr_search, CLASS_RECSYN,
1663                                                VAL_TEXT_XML);
1664                     if (srw_req->recordSchema)
1665                     {
1666                         z_searchRequest->smallSetElementSetNames =
1667                             z_searchRequest->mediumSetElementSetNames =
1668                             mk_esn_from_schema(m_s2z_odr_search,
1669                                                srw_req->recordSchema);
1670                     }
1671                 }
1672                 else   // Z39.50 present
1673                 {
1674                     m_s2z_present_apdu = zget_APDU(m_s2z_odr_search,
1675                                                    Z_APDU_presentRequest);
1676                     Z_PresentRequest *z_presentRequest =
1677                         m_s2z_present_apdu->u.presentRequest;
1678                     *z_presentRequest->resultSetStartPoint = start;
1679                     *z_presentRequest->numberOfRecordsRequested = max;
1680                     z_presentRequest->preferredRecordSyntax =
1681                         yaz_oidval_to_z3950oid(m_s2z_odr_search, CLASS_RECSYN,
1682                                                VAL_TEXT_XML);
1683                     z_presentRequest->recordComposition =
1684                         (Z_RecordComposition *)
1685                         odr_malloc(m_s2z_odr_search,
1686                                    sizeof(Z_RecordComposition));
1687                     if (srw_req->recordSchema)
1688                     {
1689                         z_presentRequest->recordComposition->which =
1690                             Z_RecordComp_simple;
1691                         z_presentRequest->recordComposition->u.simple =
1692                             mk_esn_from_schema(m_s2z_odr_search,
1693                                                srw_req->recordSchema);
1694                     }
1695                 }
1696             }
1697             if (!m_client)
1698             {
1699                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
1700                                             Z_APDU_initRequest);
1701
1702                 // prevent m_initRequest_apdu memory from being grabbed
1703                 // in Yaz_Proxy::handle_incoming_Z_PDU
1704                 m_initRequest_apdu = m_s2z_init_apdu;
1705                 handle_incoming_Z_PDU(m_s2z_init_apdu);
1706                 return;
1707             }
1708             else
1709             {
1710                 handle_incoming_Z_PDU(m_s2z_search_apdu);
1711                 return;
1712             }
1713         }
1714         else if (srw_pdu->which == Z_SRW_explain_request)
1715         {
1716             Z_SRW_explainRequest *srw_req = srw_pdu->u.explain_request;
1717
1718             if (srw_req->recordPacking &&
1719                 !strcmp(srw_req->recordPacking, "xml"))
1720                 m_s2z_packing = Z_SRW_recordPacking_XML;
1721             else
1722                 m_s2z_packing = Z_SRW_recordPacking_string;
1723
1724             if (!m_client)
1725             {
1726                 yaz_log(LOG_LOG, "handle_incoming: initRequest");
1727                 m_s2z_init_apdu = zget_APDU(m_s2z_odr_init,
1728                                             Z_APDU_initRequest);
1729
1730                 // prevent m_initRequest_apdu memory from being grabbed
1731                 // in Yaz_Proxy::handle_incoming_Z_PDU
1732                 m_initRequest_apdu = m_s2z_init_apdu;
1733                 handle_incoming_Z_PDU(m_s2z_init_apdu);
1734             }
1735             else
1736                 send_srw_explain();
1737             return;
1738         }
1739     }
1740     int len = 0;
1741     Z_GDU *p = z_get_HTTP_Response(odr_encode(), 400);
1742     send_GDU(p, &len);
1743     timeout(1);
1744 }
1745
1746 void Yaz_Proxy::handle_incoming_Z_PDU(Z_APDU *apdu)
1747 {
1748     if (!m_client && m_invalid_session)
1749     {
1750         m_apdu_invalid_session = apdu;
1751         m_mem_invalid_session = odr_extract_mem(odr_decode());
1752         apdu = m_initRequest_apdu;
1753     }
1754
1755     // Determine our client.
1756     Z_OtherInformation **oi;
1757     get_otherInfoAPDU(apdu, &oi);
1758     m_client = get_client(apdu, get_cookie(oi), get_proxy(oi));
1759     if (!m_client)
1760     {
1761         delete this;
1762         return;
1763     }
1764     m_client->m_server = this;
1765
1766     if (apdu->which == Z_APDU_initRequest)
1767     {
1768         if (apdu->u.initRequest->implementationId)
1769             yaz_log(LOG_LOG, "%simplementationId: %s",
1770                     m_session_str, apdu->u.initRequest->implementationId);
1771         if (apdu->u.initRequest->implementationName)
1772             yaz_log(LOG_LOG, "%simplementationName: %s",
1773                     m_session_str, apdu->u.initRequest->implementationName);
1774         if (apdu->u.initRequest->implementationVersion)
1775             yaz_log(LOG_LOG, "%simplementationVersion: %s",
1776                     m_session_str, apdu->u.initRequest->implementationVersion);
1777         if (m_initRequest_apdu == 0)
1778         {
1779             if (m_initRequest_mem)
1780                 nmem_destroy(m_initRequest_mem);
1781             m_initRequest_apdu = apdu;
1782             m_initRequest_mem = odr_extract_mem(odr_decode());
1783         }
1784         if (m_client->m_init_flag)
1785         {
1786             if (handle_init_response_for_invalid_session(apdu))
1787                 return;
1788             Z_APDU *apdu2 = m_client->m_initResponse;
1789             apdu2->u.initResponse->otherInfo = 0;
1790             if (m_client->m_cookie && *m_client->m_cookie)
1791                 set_otherInformationString(apdu2, VAL_COOKIE, 1,
1792                                            m_client->m_cookie);
1793             apdu2->u.initResponse->referenceId =
1794                 apdu->u.initRequest->referenceId;
1795             send_to_client(apdu2);
1796             return;
1797         }
1798         m_client->m_init_flag = 1;
1799     }
1800     handle_max_record_retrieve(apdu);
1801
1802     if (apdu)
1803         apdu = handle_syntax_validation(apdu);
1804
1805     if (apdu)
1806         apdu = handle_query_transformation(apdu);
1807
1808     if (apdu)
1809         apdu = handle_query_validation(apdu);
1810
1811     if (apdu)
1812         apdu = result_set_optimize(apdu);
1813     if (!apdu)
1814     {
1815         m_client->timeout(m_target_idletime);  // mark it active even
1816         // though we didn't use it
1817         return;
1818     }
1819
1820     // delete other info part from PDU before sending to target
1821     get_otherInfoAPDU(apdu, &oi);
1822     if (oi)
1823         *oi = 0;
1824
1825     if (apdu->which == Z_APDU_presentRequest &&
1826         m_client->m_resultSetStartPoint == 0)
1827     {
1828         Z_PresentRequest *pr = apdu->u.presentRequest;
1829         m_client->m_resultSetStartPoint = *pr->resultSetStartPoint;
1830         m_client->m_cache.copy_presentRequest(apdu->u.presentRequest);
1831     } else {
1832         m_client->m_resultSetStartPoint = 0;
1833     }
1834     if (m_client->send_to_target(apdu) < 0)
1835     {
1836         delete m_client;
1837         m_client = 0;
1838         delete this;
1839     }
1840     else
1841         m_client->m_waiting = 1;
1842 }
1843
1844 void Yaz_Proxy::connectNotify()
1845 {
1846 }
1847
1848 void Yaz_Proxy::shutdown()
1849 {
1850     m_invalid_session = 0;
1851     // only keep if keep_alive flag is set...
1852     if (m_client &&
1853         m_client->m_pdu_recv < m_keepalive_limit_pdu &&
1854         m_client->m_bytes_recv+m_client->m_bytes_sent < m_keepalive_limit_bw &&
1855         m_client->m_waiting == 0)
1856     {
1857         yaz_log(LOG_LOG, "%sShutdown (client to proxy) keepalive %s",
1858                  m_session_str,
1859                  m_client->get_hostname());
1860         yaz_log(LOG_LOG, "%sbw=%d pdu=%d limit-bw=%d limit-pdu=%d",
1861                 m_session_str, m_client->m_pdu_recv,
1862                 m_client->m_bytes_sent + m_client->m_bytes_recv,
1863                 m_keepalive_limit_bw, m_keepalive_limit_pdu);
1864         assert (m_client->m_waiting != 2);
1865         // Tell client (if any) that no server connection is there..
1866         m_client->m_server = 0;
1867         m_invalid_session = 0;
1868     }
1869     else if (m_client)
1870     {
1871         yaz_log (LOG_LOG, "%sShutdown (client to proxy) close %s",
1872                  m_session_str,
1873                  m_client->get_hostname());
1874         assert (m_client->m_waiting != 2);
1875         delete m_client;
1876     }
1877     else if (!m_parent)
1878     {
1879         yaz_log (LOG_LOG, "%sshutdown (client to proxy) bad state",
1880                  m_session_str);
1881         assert (m_parent);
1882     }
1883     else
1884     {
1885         yaz_log (LOG_LOG, "%sShutdown (client to proxy)",
1886                  m_session_str);
1887     }
1888     if (m_parent)
1889         m_parent->pre_init();
1890     delete this;
1891 }
1892
1893 const char *Yaz_ProxyClient::get_session_str()
1894 {
1895     if (!m_server)
1896         return "0 ";
1897     return m_server->get_session_str();
1898 }
1899
1900 void Yaz_ProxyClient::shutdown()
1901 {
1902     yaz_log (LOG_LOG, "%sShutdown (proxy to target) %s", get_session_str(),
1903              get_hostname());
1904     delete m_server;
1905     delete this;
1906 }
1907
1908 void Yaz_Proxy::failNotify()
1909 {
1910     inc_request_no();
1911     yaz_log (LOG_LOG, "%sConnection closed by client",
1912              get_session_str());
1913     shutdown();
1914 }
1915
1916 void Yaz_ProxyClient::failNotify()
1917 {
1918     if (m_server)
1919         m_server->inc_request_no();
1920     yaz_log (LOG_LOG, "%sConnection closed by target %s",
1921              get_session_str(), get_hostname());
1922     shutdown();
1923 }
1924
1925 void Yaz_ProxyClient::connectNotify()
1926 {
1927     const char *s = get_session_str();
1928     const char *h = get_hostname();
1929     yaz_log (LOG_LOG, "%sConnection accepted by %s timeout=%d", s, h,
1930              m_target_idletime);
1931     timeout(m_target_idletime);
1932     if (!m_server)
1933         pre_init_client();
1934 }
1935
1936 IYaz_PDU_Observer *Yaz_ProxyClient::sessionNotify(IYaz_PDU_Observable
1937                                                   *the_PDU_Observable, int fd)
1938 {
1939     return new Yaz_ProxyClient(the_PDU_Observable, 0);
1940 }
1941
1942 Yaz_ProxyClient::~Yaz_ProxyClient()
1943 {
1944     if (m_prev)
1945         *m_prev = m_next;
1946     if (m_next)
1947         m_next->m_prev = m_prev;
1948     m_waiting = 2;     // for debugging purposes only.
1949     odr_destroy(m_init_odr);
1950     delete m_last_query;
1951     xfree (m_last_resultSetId);
1952     xfree (m_cookie);
1953 }
1954
1955 void Yaz_ProxyClient::pre_init_client()
1956 {
1957     Z_APDU *apdu = create_Z_PDU(Z_APDU_initRequest);
1958     Z_InitRequest *req = apdu->u.initRequest;
1959
1960     ODR_MASK_SET(req->options, Z_Options_search);
1961     ODR_MASK_SET(req->options, Z_Options_present);
1962     ODR_MASK_SET(req->options, Z_Options_namedResultSets);
1963     ODR_MASK_SET(req->options, Z_Options_triggerResourceCtrl);
1964     ODR_MASK_SET(req->options, Z_Options_scan);
1965     ODR_MASK_SET(req->options, Z_Options_sort);
1966     ODR_MASK_SET(req->options, Z_Options_extendedServices);
1967     ODR_MASK_SET(req->options, Z_Options_delSet);
1968
1969     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_1);
1970     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_2);
1971     ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_3);
1972
1973     if (send_to_target(apdu) < 0)
1974     {
1975         delete this;
1976     }
1977     else
1978     {
1979         m_waiting = 1;
1980         m_init_flag = 1;
1981     }
1982 }
1983
1984 void Yaz_Proxy::pre_init()
1985 {
1986     int i;
1987     const char *name = 0;
1988     const char *zurl_in_use[MAX_ZURL_PLEX];
1989     int limit_bw, limit_pdu, limit_req;
1990     int target_idletime, client_idletime;
1991     int max_clients;
1992     int keepalive_limit_bw, keepalive_limit_pdu;
1993     int pre_init;
1994     const char *cql2rpn = 0;
1995     const char *zeerex = 0;
1996
1997     Yaz_ProxyConfig *cfg = check_reconfigure();
1998
1999     zurl_in_use[0] = 0;
2000
2001     if (m_log_mask & PROXY_LOG_APDU_CLIENT)
2002         set_APDU_yazlog(1);
2003     else
2004         set_APDU_yazlog(0);
2005
2006     for (i = 0; cfg && cfg->get_target_no(i, &name, zurl_in_use,
2007                                           &limit_bw, &limit_pdu, &limit_req,
2008                                           &target_idletime, &client_idletime,
2009                                           &max_clients,
2010                                           &keepalive_limit_bw,
2011                                           &keepalive_limit_pdu,
2012                                           &pre_init,
2013                                           &cql2rpn) ; i++)
2014     {
2015         if (pre_init)
2016         {
2017             int j;
2018             for (j = 0; zurl_in_use[j]; j++)
2019             {
2020                 Yaz_ProxyClient *c;
2021                 int spare = 0;
2022                 int in_use = 0;
2023                 int other = 0;
2024                 for (c = m_clientPool; c; c = c->m_next)
2025                 {
2026                     if (!strcmp(zurl_in_use[j], c->get_hostname()))
2027                     {
2028                         if (c->m_cookie == 0)
2029                         {
2030                             if (c->m_server == 0)
2031                                 spare++;
2032                             else
2033                                 in_use++;
2034                         }
2035                         else
2036                             other++;
2037                     }
2038                 }
2039                 yaz_log(LOG_LOG, "%spre-init %s %s use=%d other=%d spare=%d "
2040                         "preinit=%d",m_session_str,
2041                         name, zurl_in_use[j], in_use, other, spare, pre_init);
2042                 if (spare < pre_init)
2043                 {
2044                     c = new Yaz_ProxyClient(m_PDU_Observable->clone(), this);
2045                     c->m_next = m_clientPool;
2046                     if (c->m_next)
2047                         c->m_next->m_prev = &c->m_next;
2048                     m_clientPool = c;
2049                     c->m_prev = &m_clientPool;
2050
2051                     if (m_log_mask & PROXY_LOG_APDU_SERVER)
2052                         c->set_APDU_yazlog(1);
2053                     else
2054                         c->set_APDU_yazlog(0);
2055
2056                     if (c->client(zurl_in_use[j]))
2057                     {
2058                         timeout(60);
2059                         delete c;
2060                         return;
2061                     }
2062                     c->timeout(30);
2063                     c->m_waiting = 1;
2064                     c->m_target_idletime = target_idletime;
2065                     c->m_seqno = m_seqno++;
2066                 }
2067             }
2068         }
2069     }
2070 }
2071
2072 void Yaz_Proxy::timeoutNotify()
2073 {
2074     if (m_parent)
2075     {
2076         if (m_bw_hold_PDU)
2077         {
2078             timeout(m_client_idletime);
2079             Z_GDU *apdu = m_bw_hold_PDU;
2080             m_bw_hold_PDU = 0;
2081
2082             if (apdu->which == Z_GDU_Z3950)
2083                 handle_incoming_Z_PDU(apdu->u.z3950);
2084             else if (apdu->which == Z_GDU_HTTP_Request)
2085                 handle_incoming_HTTP(apdu->u.HTTP_Request);
2086         }
2087         else
2088         {
2089             inc_request_no();
2090
2091             yaz_log (LOG_LOG, "%sTimeout (client to proxy)", m_session_str);
2092             shutdown();
2093         }
2094     }
2095     else
2096     {
2097         timeout(600);
2098         pre_init();
2099     }
2100 }
2101
2102 void Yaz_ProxyClient::timeoutNotify()
2103 {
2104     if (m_server)
2105         m_server->inc_request_no();
2106
2107     yaz_log (LOG_LOG, "%sTimeout (proxy to target) %s", get_session_str(),
2108              get_hostname());
2109     m_waiting = 1;
2110     m_root->pre_init();
2111     shutdown();
2112 }
2113
2114 Yaz_ProxyClient::Yaz_ProxyClient(IYaz_PDU_Observable *the_PDU_Observable,
2115                                  Yaz_Proxy *parent) :
2116     Yaz_Z_Assoc (the_PDU_Observable)
2117 {
2118     m_cookie = 0;
2119     m_next = 0;
2120     m_prev = 0;
2121     m_init_flag = 0;
2122     m_last_query = 0;
2123     m_last_resultSetId = 0;
2124     m_last_resultCount = 0;
2125     m_last_ok = 0;
2126     m_sr_transform = 0;
2127     m_waiting = 0;
2128     m_init_odr = odr_createmem (ODR_DECODE);
2129     m_initResponse = 0;
2130     m_resultSetStartPoint = 0;
2131     m_bytes_sent = m_bytes_recv = 0;
2132     m_pdu_recv = 0;
2133     m_server = 0;
2134     m_seqno = 0;
2135     m_target_idletime = 600;
2136     m_root = parent;
2137 }
2138
2139 const char *Yaz_Proxy::option(const char *name, const char *value)
2140 {
2141     if (!strcmp (name, "optimize")) {
2142         if (value) {
2143             xfree (m_optimize);
2144             m_optimize = xstrdup (value);
2145         }
2146         return m_optimize;
2147     }
2148     return 0;
2149 }
2150
2151 void Yaz_ProxyClient::recv_HTTP_response(Z_HTTP_Response *apdu, int len)
2152 {
2153
2154 }
2155
2156 void Yaz_ProxyClient::recv_GDU(Z_GDU *apdu, int len)
2157 {
2158     if (apdu->which == Z_GDU_Z3950)
2159         recv_Z_PDU(apdu->u.z3950, len);
2160     else if (apdu->which == Z_GDU_HTTP_Response)
2161         recv_HTTP_response(apdu->u.HTTP_Response, len);
2162     else
2163         shutdown();
2164 }
2165
2166 int Yaz_Proxy::handle_init_response_for_invalid_session(Z_APDU *apdu)
2167 {
2168     if (!m_invalid_session)
2169         return 0;
2170     m_invalid_session = 0;
2171     handle_incoming_Z_PDU(m_apdu_invalid_session);
2172     assert (m_mem_invalid_session);
2173     nmem_destroy(m_mem_invalid_session);
2174     m_mem_invalid_session = 0;
2175     return 1;
2176 }
2177
2178 void Yaz_ProxyClient::recv_Z_PDU(Z_APDU *apdu, int len)
2179 {
2180     m_bytes_recv += len;
2181     m_pdu_recv++;
2182     m_waiting = 0;
2183     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
2184         yaz_log (LOG_LOG, "%sReceiving %s from %s %d bytes", get_session_str(),
2185                  apdu_name(apdu), get_hostname(), len);
2186     if (apdu->which == Z_APDU_initResponse)
2187     {
2188         if (!m_server)  // if this is a pre init session , check for more
2189             m_root->pre_init();
2190         NMEM nmem = odr_extract_mem (odr_decode());
2191         odr_reset (m_init_odr);
2192         nmem_transfer (m_init_odr->mem, nmem);
2193         m_initResponse = apdu;
2194
2195         Z_InitResponse *ir = apdu->u.initResponse;
2196         char *im0 = ir->implementationName;
2197
2198         char *im1 = (char*)
2199             odr_malloc(m_init_odr, 20 + (im0 ? strlen(im0) : 0));
2200         *im1 = '\0';
2201         if (im0)
2202         {
2203             strcat(im1, im0);
2204             strcat(im1, " ");
2205         }
2206         strcat(im1, "(YAZ Proxy)");
2207         ir->implementationName = im1;
2208
2209         nmem_destroy (nmem);
2210
2211         if (m_server && m_server->handle_init_response_for_invalid_session(apdu))
2212             return;
2213     }
2214     if (apdu->which == Z_APDU_searchResponse)
2215     {
2216         Z_SearchResponse *sr = apdu->u.searchResponse;
2217         m_last_resultCount = *sr->resultCount;
2218         int status = *sr->searchStatus;
2219         if (status && (!sr->records || sr->records->which == Z_Records_DBOSD))
2220         {
2221             m_last_ok = 1;
2222
2223             if (sr->records && sr->records->which == Z_Records_DBOSD)
2224             {
2225                 m_cache.add(odr_decode(),
2226                             sr->records->u.databaseOrSurDiagnostics, 1,
2227                             *sr->resultCount);
2228             }
2229         }
2230     }
2231     if (apdu->which == Z_APDU_presentResponse)
2232     {
2233         Z_PresentResponse *pr = apdu->u.presentResponse;
2234         if (m_sr_transform)
2235         {
2236             m_sr_transform = 0;
2237             Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
2238             Z_SearchResponse *sr = new_apdu->u.searchResponse;
2239             sr->referenceId = pr->referenceId;
2240             *sr->resultCount = m_last_resultCount;
2241             sr->records = pr->records;
2242             sr->nextResultSetPosition = pr->nextResultSetPosition;
2243             sr->numberOfRecordsReturned = pr->numberOfRecordsReturned;
2244             apdu = new_apdu;
2245         }
2246         if (pr->records &&
2247             pr->records->which == Z_Records_DBOSD && m_resultSetStartPoint)
2248         {
2249             m_cache.add(odr_decode(),
2250                         pr->records->u.databaseOrSurDiagnostics,
2251                         m_resultSetStartPoint, -1);
2252             m_resultSetStartPoint = 0;
2253         }
2254     }
2255     if (m_cookie)
2256         set_otherInformationString (apdu, VAL_COOKIE, 1, m_cookie);
2257     if (m_server)
2258     {
2259         m_server->send_to_client(apdu);
2260     }
2261     if (apdu->which == Z_APDU_close)
2262     {
2263         shutdown();
2264     }
2265 }
2266
2267 int Yaz_Proxy::server(const char *addr)
2268 {
2269     int r = Yaz_Z_Assoc::server(addr);
2270     if (!r)
2271     {
2272         yaz_log(LOG_LOG, "%sStarted proxy " VERSION " on %s", m_session_str, addr);
2273         timeout(1);
2274     }
2275     return r;
2276 }
2277