src/sru_util.cpp

   1 /* This file is part of Metaproxy.
   2    Copyright (C) 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         xmlFree(xmlbuff);
 135     }
 136
 137
 138     // z3950'fy recordPacking
 139     int record_packing = Z_SRW_recordPacking_XML;
 140     if (er_req && er_req->recordPacking && 's' == *(er_req->recordPacking))
 141         record_packing = Z_SRW_recordPacking_string;
 142
 143     // preparing explain record insert
 144     Z_SRW_explainResponse *sru_res = sru_pdu_res->u.explain_response;
 145
 146     // inserting one and only explain record
 147
 148     sru_res->record.recordPosition = odr_intdup(odr_en, 1);
 149     sru_res->record.recordPacking = record_packing;
 150     sru_res->record.recordSchema = (char *)xmlns_explain.c_str();
 151     sru_res->record.recordData_len = 1 + explain_xml.size();
 152     sru_res->record.recordData_buf
 153         = odr_strdupn(odr_en, (const char *)explain_xml.c_str(),
 154                       1 + explain_xml.size());
 155
 156     return true;
 157 }
 158
 159
 160 bool mp_util::build_sru_response(mp::Package &package,
 161                                  mp::odr &odr_en,
 162                                  Z_SOAP *soap,
 163                                  const Z_SRW_PDU *sru_pdu_res,
 164                                  char *charset,
 165                                  const char *stylesheet)
 166 {
 167
 168     // SRU request package translation to Z3950 package
 169     //if (sru_pdu_res)
 170     //    std::cout << *(const_cast<Z_SRW_PDU *>(sru_pdu_res)) << "\n";
 171     //else
 172     //    std::cout << "SRU empty\n";
 173
 174
 175     Z_GDU *zgdu_req = package.request().get();
 176     if  (zgdu_req && zgdu_req->which == Z_GDU_HTTP_Request)
 177     {
 178         Z_GDU *zgdu_res //= z_get_HTTP_Response(odr_en, 200);
 179             = odr_en.create_HTTP_Response(package.session(),
 180                                           zgdu_req->u.HTTP_Request,
 181                                           200);
 182
 183         // adding HTTP response code and headers
 184         Z_HTTP_Response * http_res = zgdu_res->u.HTTP_Response;
 185         //http_res->code = http_code;
 186
 187         std::string ctype("text/xml");
 188         if (charset)
 189         {
 190             ctype += "; charset=";
 191             ctype += charset;
 192         }
 193
 194         z_HTTP_header_add(odr_en,
 195                           &http_res->headers, "Content-Type", ctype.c_str());
 196
 197         // packaging Z_SOAP into HTML response
 198         static Z_SOAP_Handler soap_handlers[4] = {
 199             {(char *)YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
 200             {(char *)YAZ_XMLNS_SRU_v1_0, 0,  (Z_SOAP_fun) yaz_srw_codec},
 201             {(char *)YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
 202             {0, 0, 0}
 203         };
 204
 205
 206         // empty stylesheet means NO stylesheet
 207         if (stylesheet && *stylesheet == '\0')
 208             stylesheet = 0;
 209
 210         // encoding SRU package
 211
 212         soap->u.generic->p  = (void*) sru_pdu_res;
 213         //int ret =
 214         z_soap_codec_enc_xsl(odr_en, &soap,
 215                              &http_res->content_buf, &http_res->content_len,
 216                              soap_handlers, charset, stylesheet);
 217
 218
 219         package.response() = zgdu_res;
 220         return true;
 221     }
 222     package.session().close();
 223     return false;
 224 }
 225
 226
 227
 228 Z_SRW_PDU * mp_util::decode_sru_request(mp::Package &package,
 229                                         mp::odr &odr_de,
 230                                         mp::odr &odr_en,
 231                                         Z_SRW_diagnostic **diagnostic,
 232                                         int *num_diagnostic,
 233                                         Z_SOAP **soap,
 234                                         char *charset)
 235 {
 236     Z_GDU *zgdu_req = package.request().get();
 237     Z_SRW_PDU *sru_pdu_req = 0;
 238
 239     //assert((zgdu_req->which == Z_GDU_HTTP_Request));
 240
 241     //ignoring all non HTTP_Request packages
 242     if (!zgdu_req || !(zgdu_req->which == Z_GDU_HTTP_Request))
 243     {
 244         return 0;
 245     }
 246
 247     Z_HTTP_Request* http_req =  zgdu_req->u.HTTP_Request;
 248     if (! http_req)
 249         return 0;
 250
 251     // checking if we got a SRU GET/POST/SOAP HTTP package
 252     // closing connection if we did not ...
 253     if (0 == yaz_sru_decode(http_req, &sru_pdu_req, soap,
 254                             odr_de, &charset,
 255                             diagnostic, num_diagnostic))
 256     {
 257         return sru_pdu_req;
 258     }
 259     else if (0 == yaz_srw_decode(http_req, &sru_pdu_req, soap,
 260                                  odr_de, &charset))
 261         return sru_pdu_req;
 262     else
 263     {
 264         //sru_pdu_res = sru_pdu_res_exp;
 265         package.session().close();
 266         return 0;
 267     }
 268     return 0;
 269 }
 270
 271
 272 bool
 273 mp_util::check_sru_query_exists(mp::Package &package,
 274                                 mp::odr &odr_en,
 275                                 Z_SRW_PDU *sru_pdu_res,
 276                                 Z_SRW_searchRetrieveRequest const *sr_req)
 277 {
 278     if (!sr_req->query)
 279     {
 280         yaz_add_srw_diagnostic(odr_en,
 281                                &(sru_pdu_res->u.response->diagnostics),
 282                                &(sru_pdu_res->u.response->num_diagnostics),
 283                                YAZ_SRW_MANDATORY_PARAMETER_NOT_SUPPLIED,
 284                                "query");
 285         yaz_add_srw_diagnostic(odr_en,
 286                                &(sru_pdu_res->u.response->diagnostics),
 287                                &(sru_pdu_res->u.response->num_diagnostics),
 288                                YAZ_SRW_QUERY_SYNTAX_ERROR,
 289                                "CQL query is empty");
 290         return false;
 291     }
 292     return true;
 293 }
 294
 295
 296 Z_ElementSetNames *
 297 mp_util::build_esn_from_schema(mp::odr &odr_en, const char *schema)
 298 {
 299     if (!schema)
 300         return 0;
 301
 302     Z_ElementSetNames *esn
 303         = (Z_ElementSetNames *) odr_malloc(odr_en, sizeof(Z_ElementSetNames));
 304     esn->which = Z_ElementSetNames_generic;
 305     esn->u.generic = odr_strdup(odr_en, schema);
 306     return esn;
 307 }
 308
 309
 310 std::ostream& std::operator<<(std::ostream& os, Z_SRW_PDU& srw_pdu)
 311 {
 312     os << "SRU";
 313
 314     switch (srw_pdu.which)
 315     {
 316     case  Z_SRW_searchRetrieve_request:
 317         os << " " << "searchRetrieveRequest";
 318         {
 319             Z_SRW_searchRetrieveRequest *sr = srw_pdu.u.request;
 320             if (sr)
 321             {
 322                 if (sr->database)
 323                     os << " " << (sr->database);
 324                 else
 325                     os << " -";
 326                 if (sr->startRecord)
 327                     os << " " << *(sr->startRecord);
 328                 else
 329                     os << " -";
 330                 if (sr->maximumRecords)
 331                     os << " " << *(sr->maximumRecords);
 332                 else
 333                     os << " -";
 334                 if (sr->recordPacking)
 335                     os << " " << (sr->recordPacking);
 336                 else
 337                     os << " -";
 338
 339                 if (sr->recordSchema)
 340                     os << " " << (sr->recordSchema);
 341                 else
 342                     os << " -";
 343                 os << " " << (sr->queryType ? sr->queryType : "cql")
 344                    << " " << sr->query;
 345             }
 346         }
 347         break;
 348     case  Z_SRW_searchRetrieve_response:
 349         os << " " << "searchRetrieveResponse";
 350         {
 351             Z_SRW_searchRetrieveResponse *sr = srw_pdu.u.response;
 352             if (sr)
 353             {
 354                 if (! (sr->num_diagnostics))
 355                 {
 356                     os << " OK";
 357                     if (sr->numberOfRecords)
 358                         os << " " << *(sr->numberOfRecords);
 359                     else
 360                         os << " -";
 361                     //if (sr->num_records)
 362                     os << " " << (sr->num_records);
 363                     //else
 364                     //os << " -";
 365                     if (sr->nextRecordPosition)
 366                         os << " " << *(sr->nextRecordPosition);
 367                     else
 368                         os << " -";
 369                 }
 370                 else
 371                 {
 372                     os << " DIAG";
 373                     if (sr->diagnostics && sr->diagnostics->uri)
 374                         os << " " << (sr->diagnostics->uri);
 375                     else
 376                         os << " -";
 377                     if (sr->diagnostics && sr->diagnostics->message)
 378                         os << " " << (sr->diagnostics->message);
 379                     else
 380                         os << " -";
 381                     if (sr->diagnostics && sr->diagnostics->details)
 382                         os << " " << (sr->diagnostics->details);
 383                     else
 384                         os << " -";
 385                 }
 386
 387
 388             }
 389         }
 390         break;
 391     case  Z_SRW_explain_request:
 392         os << " " << "explainRequest";
 393         break;
 394     case  Z_SRW_explain_response:
 395         os << " " << "explainResponse";
 396         break;
 397     case  Z_SRW_scan_request:
 398         os << " " << "scanRequest";
 399         break;
 400     case  Z_SRW_scan_response:
 401         os << " " << "scanResponse";
 402         break;
 403     case  Z_SRW_update_request:
 404         os << " " << "updateRequest";
 405         break;
 406     case  Z_SRW_update_response:
 407         os << " " << "updateResponse";
 408         break;
 409     default:
 410         os << " " << "UNKNOWN";
 411     }
 412
 413     return os;
 414 }
 415
 416 /*
 417  * Local variables:
 418  * c-basic-offset: 4
 419  * c-file-style: "Stroustrup"
 420  * indent-tabs-mode: nil
 421  * End:
 422  * vim: shiftwidth=4 tabstop=8 expandtab
 423  */
 424