src/filter_sd_remove.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 "config.hpp"
  20 #include "filter_sd_remove.hpp"
  21 #include <metaproxy/package.hpp>
  22 #include <metaproxy/util.hpp>
  23 #include <yaz/zgdu.h>
  24 #include <metaproxy/filter.hpp>
  25 #include <yaz/querytowrbuf.h>
  26
  27 namespace metaproxy_1 {
  28     namespace filter {
  29         class SD_Remove : public Base {
  30         public:
  31             SD_Remove();
  32             ~SD_Remove();
  33             void process(metaproxy_1::Package & package) const;
  34             void configure(const xmlNode * ptr, bool test_only,
  35                            const char *path);
  36         };
  37     }
  38 }
  39
  40 namespace mp = metaproxy_1;
  41 namespace yf = mp::filter;
  42
  43 yf::SD_Remove::SD_Remove()
  44 {
  45 }
  46
  47 yf::SD_Remove::~SD_Remove()
  48 {
  49 }
  50
  51 void yf::SD_Remove::configure(const xmlNode *xmlnode, bool test_only,
  52                              const char *path)
  53 {
  54     if (xmlnode)
  55     {
  56         xmlNode *ptr;
  57         for (ptr = xmlnode->children; ptr; ptr = ptr->next)
  58         {
  59             if (ptr->type == XML_ELEMENT_NODE)
  60                 throw mp::filter::FilterException("Bad element "
  61                                                   + std::string((const char *)
  62                                                                 ptr->name));
  63         }
  64     }
  65 }
  66
  67 void yf::SD_Remove::process(mp::Package &package) const
  68 {
  69     package.move();
  70
  71     Z_GDU *gdu_res = package.response().get();
  72     if (gdu_res && gdu_res->which == Z_GDU_Z3950)
  73     {
  74         Z_NamePlusRecordList *records = 0;
  75         Z_APDU *apdu = gdu_res->u.z3950;
  76         if (apdu->which == Z_APDU_presentResponse)
  77         {
  78             Z_PresentResponse * pr_res = apdu->u.presentResponse;
  79             if (pr_res->numberOfRecordsReturned
  80                 && *(pr_res->numberOfRecordsReturned) > 0
  81                 && pr_res->records
  82                 && pr_res->records->which == Z_Records_DBOSD)
  83             {
  84                 records = pr_res->records->u.databaseOrSurDiagnostics;
  85             }
  86         }
  87         if (apdu->which == Z_APDU_searchResponse)
  88         {
  89             Z_SearchResponse *sr_res = apdu->u.searchResponse;
  90             if (
  91                 sr_res->numberOfRecordsReturned
  92                 && *(sr_res->numberOfRecordsReturned) > 0
  93                 && sr_res->records
  94                 && sr_res->records->which == Z_Records_DBOSD)
  95             {
  96                 records = sr_res->records->u.databaseOrSurDiagnostics;
  97             }
  98         }
  99         if (records)
 100         {
 101             mp::odr odr_en(ODR_ENCODE);
 102             int i;
 103             for (i = 0; i < records->num_records; i++)
 104             {
 105                 Z_NamePlusRecord *npr = records->records[i];
 106                 if (npr->which == Z_NamePlusRecord_surrogateDiagnostic)
 107                 {
 108                     WRBUF w = wrbuf_alloc();
 109                     wrbuf_diags(w, 1, &npr->u.surrogateDiagnostic);
 110                     npr->which = Z_NamePlusRecord_databaseRecord;
 111                     npr->u.databaseRecord = z_ext_record_sutrs(odr_en,
 112                                                                wrbuf_buf(w),
 113                                                                wrbuf_len(w));
 114                     wrbuf_destroy(w);
 115                 }
 116             }
 117             package.response() = gdu_res;
 118         }
 119     }
 120 }
 121
 122
 123 static mp::filter::Base* filter_creator()
 124 {
 125     return new mp::filter::SD_Remove;
 126 }
 127
 128 extern "C" {
 129     struct metaproxy_1_filter_struct metaproxy_1_filter_sd_remove = {
 130         0,
 131         "sd_remove",
 132         filter_creator
 133     };
 134 }
 135
 136
 137 /*
 138  * Local variables:
 139  * c-basic-offset: 4
 140  * c-file-style: "Stroustrup"
 141  * indent-tabs-mode: nil
 142  * End:
 143  * vim: shiftwidth=4 tabstop=8 expandtab
 144  */
 145