src/sru_util.cpp

   1 /* This file is part of Metaproxy.
   2    Copyright (C) 2005-2013 Index Data
   3
   4 Metaproxy is free software; you can redistribute it and/or modify it under
   5 the terms of the GNU General Public License as published by the Free
   6 Software Foundation; either version 2, or (at your option) any later
   7 version.
   8
   9 Metaproxy is distributed in the hope that it will be useful, but WITHOUT ANY
  10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17 */
  18
  19 #include "sru_util.hpp"
  20 #include <metaproxy/util.hpp>
  21
  22 #include <iostream>
  23 #include <string>
  24
  25 namespace mp = metaproxy_1;
  26
  27 // Doxygen doesn't like mp::gdu, so we use this instead
  28 namespace mp_util = metaproxy_1::util;
  29
  30 const std::string xmlns_explain("http://explain.z3950.org/dtd/2.0/");
  31
  32 bool mp_util::build_sru_debug_package(mp::Package &package)
  33 {
  34     Z_GDU *zgdu_req = package.request().get();
  35     if (zgdu_req && zgdu_req->which == Z_GDU_HTTP_Request)
  36     {
  37         Z_HTTP_Request* http_req =  zgdu_req->u.HTTP_Request;
  38         std::string content = mp_util::http_headers_debug(*http_req);
  39         int http_code = 400;
  40         mp_util::http_response(package, content, http_code);
  41         return true;
  42     }
  43     package.session().close();
  44     return false;
  45 }
  46
  47 mp_util::SRUServerInfo mp_util::get_sru_server_info(mp::Package &package)
  48 {
  49     mp_util::SRUServerInfo sruinfo;
  50
  51     // getting host and port info
  52     sruinfo.host = "localhost";
  53     sruinfo.port = "80";
  54
  55     // overwriting host and port info if set from HTTP Host header
  56     Z_GDU *zgdu_req = package.request().get();
  57     if (zgdu_req && zgdu_req->which == Z_GDU_HTTP_Request)
  58     {
  59         Z_HTTP_Request* http_req =  zgdu_req->u.HTTP_Request;
  60         if (http_req)
  61         {
  62             std::string http_path = http_req->path;
  63
  64             // taking out GET parameters
  65             std::string::size_type ipath = http_path.rfind("?");
  66             if (ipath != std::string::npos)
  67                 http_path.assign(http_path, 0, ipath);
  68
  69             // assign to database name
  70             if (http_path.size() > 1)
  71                 sruinfo.database.assign(http_path, 1, std::string::npos);
  72
  73             std::string http_host_address
  74                 = mp_util::http_header_value(http_req->headers, "Host");
  75
  76             std::string::size_type iaddress = http_host_address.rfind(":");
  77             if (iaddress != std::string::npos)
  78             {
  79                 sruinfo.host.assign(http_host_address, 0, iaddress);
  80                 sruinfo.port.assign(http_host_address, iaddress + 1,
  81                                     std::string::npos);
  82             }
  83         }
  84     }
  85
  86     //std::cout << "sruinfo.database " << sruinfo.database << "\n";
  87     //std::cout << "sruinfo.host " << sruinfo.host << "\n";
  88     //std::cout << "sruinfo.port " << sruinfo.port << "\n";
  89
  90     return sruinfo;
  91 }
  92
  93
  94 bool mp_util::build_sru_explain(metaproxy_1::Package &package,
  95                                 metaproxy_1::odr &odr_en,
  96                                 Z_SRW_PDU *sru_pdu_res,
  97                                 SRUServerInfo sruinfo,
  98                                 const xmlNode *explain,
  99                                 Z_SRW_explainRequest const *er_req)
 100 {
 101
 102     // building SRU explain record
 103     std::string explain_xml;
 104
 105     if (explain == 0)
 106     {
 107         explain_xml
 108             = mp_util::to_string(
 109                 "<explain  xmlns=\"" + xmlns_explain + "\">\n"
 110                 "  <serverInfo protocol='SRU'>\n"
 111                 "    <host>")
 112             + sruinfo.host
 113             + mp_util::to_string("</host>\n"
 114                                  "    <port>")
 115             + sruinfo.port
 116             + mp_util::to_string("</port>\n"
 117                                  "    <database>")
 118             + sruinfo.database
 119             + mp_util::to_string("</database>\n"
 120                                  "  </serverInfo>\n"
 121                                  "</explain>\n");
 122     }
 123     else
 124     {
 125         // make new XML DOC with given explain node
 126         xmlDocPtr doc =  xmlNewDoc(BAD_CAST "1.0");
 127         xmlDocSetRootElement(doc, (xmlNode*)explain);
 128
 129         xmlChar *xmlbuff;
 130         int xmlbuffsz;
 131         xmlDocDumpFormatMemory(doc, &xmlbuff, &xmlbuffsz, 1);
 132
 133         explain_xml.assign((const char*)xmlbuff, 0, xmlbuffsz);
 134     }
 135
 136
 137     // z3950'fy recordPacking
 138     int record_packing = Z_SRW_recordPacking_XML;
 139     if (er_req && er_req->recordPacking && 's' == *(er_req->recordPacking))
 140         record_packing = Z_SRW_recordPacking_string;
 141
 142     // preparing explain record insert
 143     Z_SRW_explainResponse *sru_res = sru_pdu_res->u.explain_response;
 144
 145     // inserting one and only explain record
 146
 147     sru_res->record.recordPosition = odr_intdup(odr_en, 1);
 148     sru_res->record.recordPacking = record_packing;
 149     sru_res->record.recordSchema = (char *)xmlns_explain.c_str();
 150     sru_res->record.recordData_len = 1 + explain_xml.size();
 151     sru_res->record.recordData_buf
 152         = odr_strdupn(odr_en, (const char *)explain_xml.c_str(),
 153                       1 + explain_xml.size());
 154
 155     return true;
 156 }
 157
 158
 159 bool mp_util::build_sru_response(mp::Package &package,
 160                                  mp::odr &odr_en,
 161                                  Z_SOAP *soap,
 162                                  const Z_SRW_PDU *sru_pdu_res,
 163                                  char *charset,
 164                                  const char *stylesheet)
 165 {
 166
 167     // SRU request package translation to Z3950 package
 168     //if (sru_pdu_res)
 169     //    std::cout << *(const_cast<Z_SRW_PDU *>(sru_pdu_res)) << "\n";
 170     //else
 171     //    std::cout << "SRU empty\n";
 172
 173
 174     Z_GDU *zgdu_req = package.request().get();
 175     if  (zgdu_req && zgdu_req->which == Z_GDU_HTTP_Request)
 176     {
 177         Z_GDU *zgdu_res //= z_get_HTTP_Response(odr_en, 200);
 178             = odr_en.create_HTTP_Response(package.session(),
 179                                           zgdu_req->u.HTTP_Request,
 180                                           200);
 181
 182         // adding HTTP response code and headers
 183         Z_HTTP_Response * http_res = zgdu_res->u.HTTP_Response;
 184         //http_res->code = http_code;
 185
 186         std::string ctype("text/xml");
 187         if (charset)
 188         {
 189             ctype += "; charset=";
 190             ctype += charset;
 191         }
 192
 193         z_HTTP_header_add(odr_en,
 194                           &http_res->headers, "Content-Type", ctype.c_str());
 195
 196         // packaging Z_SOAP into HTML response
 197         static Z_SOAP_Handler soap_handlers[4] = {
 198             {(char *)YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
 199             {(char *)YAZ_XMLNS_SRU_v1_0, 0,  (Z_SOAP_fun) yaz_srw_codec},
 200             {(char *)YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
 201             {0, 0, 0}
 202         };
 203
 204
 205         // empty stylesheet means NO stylesheet
 206         if (stylesheet && *stylesheet == '\0')
 207             stylesheet = 0;
 208
 209         // encoding SRU package
 210
 211         soap->u.generic->p  = (void*) sru_pdu_res;
 212         //int ret =
 213         z_soap_codec_enc_xsl(odr_en, &soap,
 214                              &http_res->content_buf, &http_res->content_len,
 215                              soap_handlers, charset, stylesheet);
 216
 217
 218         package.response() = zgdu_res;
 219         return true;
 220     }
 221     package.session().close();
 222     return false;
 223 }
 224
 225
 226
 227 Z_SRW_PDU * mp_util::decode_sru_request(mp::Package &package,
 228                                         mp::odr &odr_de,
 229                                         mp::odr &odr_en,
 230                                         Z_SRW_PDU *sru_pdu_res,
 231                                         Z_SOAP **soap,
 232                                         char *charset,
 233                                         char *stylesheet)
 234 {
 235     Z_GDU *zgdu_req = package.request().get();
 236     Z_SRW_PDU *sru_pdu_req = 0;
 237
 238     //assert((zgdu_req->which == Z_GDU_HTTP_Request));
 239
 240     //ignoring all non HTTP_Request packages
 241     if (!zgdu_req || !(zgdu_req->which == Z_GDU_HTTP_Request))
 242     {
 243         return 0;
 244     }
 245
 246     Z_HTTP_Request* http_req =  zgdu_req->u.HTTP_Request;
 247     if (! http_req)
 248         return 0;
 249
 250     // checking if we got a SRU GET/POST/SOAP HTTP package
 251     // closing connection if we did not ...
 252     if (0 == yaz_sru_decode(http_req, &sru_pdu_req, soap,
 253                             odr_de, &charset,
 254                             &(sru_pdu_res->u.response->diagnostics),
 255                             &(sru_pdu_res->u.response->num_diagnostics)))
 256     {
 257         if (sru_pdu_res->u.response->num_diagnostics)
 258         {
 259             //sru_pdu_res = sru_pdu_res_exp;
 260             package.session().close();
 261             return 0;
 262         }
 263         return sru_pdu_req;
 264     }
 265     else if (0 == yaz_srw_decode(http_req, &sru_pdu_req, soap,
 266                                  odr_de, &charset))
 267         return sru_pdu_req;
 268     else
 269     {
 270         //sru_pdu_res = sru_pdu_res_exp;
 271         package.session().close();
 272         return 0;
 273     }
 274     return 0;
 275 }
 276
 277
 278 bool
 279 mp_util::check_sru_query_exists(mp::Package &package,
 280                                 mp::odr &odr_en,
 281                                 Z_SRW_PDU *sru_pdu_res,
 282                                 Z_SRW_searchRetrieveRequest const *sr_req)
 283 {
 284     if ((sr_req->query_type == Z_SRW_query_type_cql && !sr_req->query.cql))
 285     {
 286         yaz_add_srw_diagnostic(odr_en,
 287                                &(sru_pdu_res->u.response->diagnostics),
 288                                &(sru_pdu_res->u.response->num_diagnostics),
 289                                YAZ_SRW_MANDATORY_PARAMETER_NOT_SUPPLIED,
 290                                "query");
 291         yaz_add_srw_diagnostic(odr_en,
 292                                &(sru_pdu_res->u.response->diagnostics),
 293                                &(sru_pdu_res->u.response->num_diagnostics),
 294                                YAZ_SRW_QUERY_SYNTAX_ERROR,
 295                                "CQL query is empty");
 296         return false;
 297     }
 298     if ((sr_req->query_type == Z_SRW_query_type_xcql && !sr_req->query.xcql))
 299     {
 300         yaz_add_srw_diagnostic(odr_en,
 301                                &(sru_pdu_res->u.response->diagnostics),
 302                                &(sru_pdu_res->u.response->num_diagnostics),
 303                                YAZ_SRW_QUERY_SYNTAX_ERROR,
 304                                "XCQL query is empty");
 305         return false;
 306     }
 307     if ((sr_req->query_type == Z_SRW_query_type_pqf && !sr_req->query.pqf))
 308     {
 309         yaz_add_srw_diagnostic(odr_en,
 310                                &(sru_pdu_res->u.response->diagnostics),
 311                                &(sru_pdu_res->u.response->num_diagnostics),
 312                                YAZ_SRW_QUERY_SYNTAX_ERROR,
 313                                "PQF query is empty");
 314         return false;
 315     }
 316     return true;
 317 }
 318
 319
 320 Z_ElementSetNames *
 321 mp_util::build_esn_from_schema(mp::odr &odr_en, const char *schema)
 322 {
 323     if (!schema)
 324         return 0;
 325
 326     Z_ElementSetNames *esn
 327         = (Z_ElementSetNames *) odr_malloc(odr_en, sizeof(Z_ElementSetNames));
 328     esn->which = Z_ElementSetNames_generic;
 329     esn->u.generic = odr_strdup(odr_en, schema);
 330     return esn;
 331 }
 332
 333
 334 std::ostream& std::operator<<(std::ostream& os, Z_SRW_PDU& srw_pdu)
 335 {
 336     os << "SRU";
 337
 338     switch (srw_pdu.which)
 339     {
 340     case  Z_SRW_searchRetrieve_request:
 341         os << " " << "searchRetrieveRequest";
 342         {
 343             Z_SRW_searchRetrieveRequest *sr = srw_pdu.u.request;
 344             if (sr)
 345             {
 346                 if (sr->database)
 347                     os << " " << (sr->database);
 348                 else
 349                     os << " -";
 350                 if (sr->startRecord)
 351                     os << " " << *(sr->startRecord);
 352                 else
 353                     os << " -";
 354                 if (sr->maximumRecords)
 355                     os << " " << *(sr->maximumRecords);
 356                 else
 357                     os << " -";
 358                 if (sr->recordPacking)
 359                     os << " " << (sr->recordPacking);
 360                 else
 361                     os << " -";
 362
 363                 if (sr->recordSchema)
 364                     os << " " << (sr->recordSchema);
 365                 else
 366                     os << " -";
 367
 368                 switch (sr->query_type){
 369                 case Z_SRW_query_type_cql:
 370                     os << " CQL";
 371                     if (sr->query.cql)
 372                         os << " " << sr->query.cql;
 373                     break;
 374                 case Z_SRW_query_type_xcql:
 375                     os << " XCQL";
 376                     break;
 377                 case Z_SRW_query_type_pqf:
 378                     os << " PQF";
 379                     if (sr->query.pqf)
 380                         os << " " << sr->query.pqf;
 381                     break;
 382                 }
 383             }
 384         }
 385         break;
 386     case  Z_SRW_searchRetrieve_response:
 387         os << " " << "searchRetrieveResponse";
 388         {
 389             Z_SRW_searchRetrieveResponse *sr = srw_pdu.u.response;
 390             if (sr)
 391             {
 392                 if (! (sr->num_diagnostics))
 393                 {
 394                     os << " OK";
 395                     if (sr->numberOfRecords)
 396                         os << " " << *(sr->numberOfRecords);
 397                     else
 398                         os << " -";
 399                     //if (sr->num_records)
 400                     os << " " << (sr->num_records);
 401                     //else
 402                     //os << " -";
 403                     if (sr->nextRecordPosition)
 404                         os << " " << *(sr->nextRecordPosition);
 405                     else
 406                         os << " -";
 407                 }
 408                 else
 409                 {
 410                     os << " DIAG";
 411                     if (sr->diagnostics && sr->diagnostics->uri)
 412                         os << " " << (sr->diagnostics->uri);
 413                     else
 414                         os << " -";
 415                     if (sr->diagnostics && sr->diagnostics->message)
 416                         os << " " << (sr->diagnostics->message);
 417                     else
 418                         os << " -";
 419                     if (sr->diagnostics && sr->diagnostics->details)
 420                         os << " " << (sr->diagnostics->details);
 421                     else
 422                         os << " -";
 423                 }
 424
 425
 426             }
 427         }
 428         break;
 429     case  Z_SRW_explain_request:
 430         os << " " << "explainRequest";
 431         break;
 432     case  Z_SRW_explain_response:
 433         os << " " << "explainResponse";
 434         break;
 435     case  Z_SRW_scan_request:
 436         os << " " << "scanRequest";
 437         break;
 438     case  Z_SRW_scan_response:
 439         os << " " << "scanResponse";
 440         break;
 441     case  Z_SRW_update_request:
 442         os << " " << "updateRequest";
 443         break;
 444     case  Z_SRW_update_response:
 445         os << " " << "updateResponse";
 446         break;
 447     default:
 448         os << " " << "UNKNOWN";
 449     }
 450
 451     return os;
 452 }
 453
 454 /*
 455  * Local variables:
 456  * c-basic-offset: 4
 457  * c-file-style: "Stroustrup"
 458  * indent-tabs-mode: nil
 459  * End:
 460  * vim: shiftwidth=4 tabstop=8 expandtab
 461  */
 462