X-Git-Url: http://jsfdemo.indexdata.com/?a=blobdiff_plain;f=src%2Ffilter_sru_to_z3950.cpp;h=c73d83923044222a3ce32ba41d022caafddd1947;hb=c8f0b17ee415ed2acc7b7d59c0985c89ec92829c;hp=0718b94b30521f147bebc1c1359c5aae6b3dedb8;hpb=83784d91a2132d98a3f3d81c0fdbfa9e6778b847;p=metaproxy-moved-to-github.git

diff --git a/src/filter_sru_to_z3950.cpp b/src/filter_sru_to_z3950.cpp
index 0718b94..c73d839 100644
--- a/src/filter_sru_to_z3950.cpp
+++ b/src/filter_sru_to_z3950.cpp
@@ -1,4 +1,4 @@
-/* $Id: filter_sru_to_z3950.cpp,v 1.2 2006-09-13 14:56:07 marc Exp $
+/* $Id: filter_sru_to_z3950.cpp,v 1.23 2006-12-28 12:18:01 marc Exp $
    Copyright (c) 2005-2006, Index Data.
 
    See the LICENSE file for details
@@ -8,61 +8,121 @@
 #include "filter.hpp"
 #include "package.hpp"
 #include "util.hpp"
+#include "gduutil.hpp"
+#include "sru_util.hpp"
 #include "filter_sru_to_z3950.hpp"
 
 #include <yaz/zgdu.h>
+#include <yaz/z-core.h>
 #include <yaz/srw.h>
+#include <yaz/pquery.h>
 
 #include <boost/thread/mutex.hpp>
 
 #include <iostream>
 #include <sstream>
 #include <string>
-
+#include <algorithm>
 
 namespace mp = metaproxy_1;
+namespace mp_util = metaproxy_1::util;
 namespace yf = mp::filter;
 
-namespace metaproxy_1 
-{
-
-    template<typename T>
-    std::string stringify(const T& x)
-    {
-        std::ostringstream o;
-        o << x;
-        return o.str();
-    }
-}
-
 
 namespace metaproxy_1 {
     namespace filter {
-        class SRUtoZ3950::Rep {
-            friend class SRUtoZ3950;
-            void process(metaproxy_1::Package & package) const;
-            //int dummy;
+        class SRUtoZ3950::Impl {
+        public:
+            void configure(const xmlNode *xmlnode);
+            void process(metaproxy_1::Package &package) const;
+        private:
+            union SRW_query {char * cql; char * xcql; char * pqf;};
+            typedef const int& SRW_query_type;
+        private:
+            //std::string sru_protocol(const Z_HTTP_Request &http_req) const;
+            std::string debug_http(const Z_HTTP_Request &http_req) const;
+            //void http_response(mp::Package &package, 
+            //                   const std::string &content, 
+            //                   int http_code = 200) const;
+            bool build_sru_debug_package(mp::Package &package) const;
+            bool build_simple_explain(mp::Package &package, 
+                                      mp::odr &odr_en,
+                                      Z_SRW_PDU *sru_pdu_res,
+                                      Z_SRW_explainRequest const *er_req) 
+                const;
+            bool build_sru_response(mp::Package &package, 
+                                    mp::odr &odr_en,
+                                    Z_SOAP *soap,
+                                    const Z_SRW_PDU *sru_pdu_res,
+                                    char *charset,
+                                    const char *stylesheet) const;
+            Z_SRW_PDU * decode_sru_request(mp::Package &package,   
+                                           mp::odr &odr_de,
+                                           mp::odr &odr_en,
+                                           Z_SRW_PDU *sru_pdu_res,
+                                           Z_SOAP *&soap,
+                                           char *charset,
+                                           char *stylesheet) const;
+            bool check_sru_query_exists(mp::Package &package,
+                                       mp::odr &odr_en,
+                                       Z_SRW_PDU *sru_pdu_res,
+                                       Z_SRW_searchRetrieveRequest 
+                                       const *sr_req) const;
+            bool z3950_build_query(mp::odr &odr_en, Z_Query *z_query, 
+                                   const SRW_query &query, 
+                                   SRW_query_type query_type) const;
+            bool z3950_init_request(mp::Package &package, 
+                                         const std::string 
+                                         &database = "Default") const;
+            bool z3950_close_request(mp::Package &package) const;
+            bool z3950_search_request(mp::Package &package,
+                                      mp::odr &odr_en,
+                                      Z_SRW_PDU *sru_pdu_res,
+                                      Z_SRW_searchRetrieveRequest 
+                                          const *sr_req) const;
+            bool z3950_present_request(mp::Package &package,
+                                       mp::odr &odr_en,
+                                       Z_SRW_PDU *sru_pdu_res,
+                                       Z_SRW_searchRetrieveRequest 
+                                       const *sr_req) const;
+            bool z3950_scan_request(mp::Package &package,
+                                    mp::odr &odr_en,
+                                    Z_SRW_PDU *sru_pdu_res,
+                                    Z_SRW_scanRequest 
+                                    const *sr_req) const;
+            Z_ElementSetNames * build_esn_from_schema(mp::odr &odr_en, 
+                                                      const char *schema) 
+                const;
+            int z3950_to_srw_diag(mp::odr &odr_en, 
+                                  Z_SRW_searchRetrieveResponse *srw_res,
+                                  Z_DefaultDiagFormat *ddf) const;
         };
     }
 }
 
-yf::SRUtoZ3950::SRUtoZ3950() : m_p(new Rep)
+yf::SRUtoZ3950::SRUtoZ3950() : m_p(new Impl)
 {
-    //m_p->dummy = 1;
 }
 
 yf::SRUtoZ3950::~SRUtoZ3950()
 {  // must have a destructor because of boost::scoped_ptr
 }
 
+void yf::SRUtoZ3950::configure(const xmlNode *xmlnode)
+{
+    m_p->configure(xmlnode);
+}
+
 void yf::SRUtoZ3950::process(mp::Package &package) const
 {
-    //std::cout << m_p->protocol_type(package) << "\n";
-    //m_p->debug_http_headers(package);
     m_p->process(package);
 }
 
-void yf::SRUtoZ3950::Rep::process(mp::Package &package) const
+void yf::SRUtoZ3950::Impl::configure(const xmlNode *xmlnode)
+{
+}
+
+void yf::SRUtoZ3950::Impl::process(mp::Package &package) const
 {
     Z_GDU *zgdu_req = package.request().get();
 
@@ -73,127 +133,1008 @@ void yf::SRUtoZ3950::Rep::process(mp::Package &package) const
     }
     
     // only working on  HTTP_Request packages now
-    Z_HTTP_Request* http_req =  zgdu_req->u.HTTP_Request;
 
-    // TODO: SRU package checking and translation to Z3950 package
+
+    // TODO: Z3950 response parsing and translation to SRU package
+    bool ok = true;    
+
+    mp::odr odr_de(ODR_DECODE);
+    Z_SRW_PDU *sru_pdu_req = 0;
+
+    mp::odr odr_en(ODR_ENCODE);
+    //Z_SRW_PDU *sru_pdu_res = 0;
+    Z_SRW_PDU *sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_explain_response);
+
+    Z_SOAP *soap = 0;
+    char *charset = 0;
+    char *stylesheet = 0;
+
+    if (! (sru_pdu_req = decode_sru_request(package, odr_de, odr_en, 
+                                            sru_pdu_res, soap,
+                                            charset, stylesheet)))
+    {
+        build_simple_explain(package, odr_en, sru_pdu_res, 0);
+        build_sru_response(package, odr_en, soap, 
+                           sru_pdu_res, charset, stylesheet);
+        package.session().close();
+        return;
+    }
+    
+    
+    // SRU request package translation to Z3950 package
+    //if (sru_pdu_req)
+    //    std::cout << *sru_pdu_req << "\n";
+    //else
+    //    std::cout << "SRU empty\n";
+    
+
+    // explain
+    if (sru_pdu_req && sru_pdu_req->which == Z_SRW_explain_request)
+    {
+        Z_SRW_explainRequest *er_req = sru_pdu_req->u.explain_request;
+        //sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_explain_response);
+
+        build_simple_explain(package, odr_en, sru_pdu_res, er_req);
+    }
+
+    // searchRetrieve
+    else if (sru_pdu_req 
+        && sru_pdu_req->which == Z_SRW_searchRetrieve_request
+        && sru_pdu_req->u.request)
+    {
+        Z_SRW_searchRetrieveRequest *sr_req = sru_pdu_req->u.request;   
+        
+        sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_searchRetrieve_response);
+
+        // checking that we have a query
+        ok = check_sru_query_exists(package, odr_en, sru_pdu_res, sr_req);
+
+        if (ok && z3950_init_request(package))
+        {
+            {
+                ok = z3950_search_request(package, odr_en,
+                                          sru_pdu_res, sr_req);
+
+                if (ok 
+                    && sru_pdu_res->u.response->numberOfRecords
+                    && *(sru_pdu_res->u.response->numberOfRecords)
+                    && sr_req->maximumRecords
+                    && *(sr_req->maximumRecords))
+                    
+                    ok = z3950_present_request(package, odr_en,
+                                               sru_pdu_res,
+                                               sr_req);
+                z3950_close_request(package);
+            }
+        }
+    }
+
+    // scan
+    else if (sru_pdu_req 
+             && sru_pdu_req->which == Z_SRW_scan_request
+             && sru_pdu_req->u.scan_request)
+    {
+        Z_SRW_scanRequest  *sr_req = sru_pdu_req->u.scan_request;   
+
+        sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_scan_response);
+        
+        // we do not do scan at the moment, therefore issuing a diagnostic
+        yaz_add_srw_diagnostic(odr_en,
+                               &(sru_pdu_res->u.scan_response->diagnostics), 
+                               &(sru_pdu_res->u.scan_response->num_diagnostics), 
+                               4, "scan");
  
+        // to be used when we do scan
+        if (false && z3950_init_request(package))
+        {
+            z3950_scan_request(package, odr_en, sru_pdu_res, sr_req);    
+            z3950_close_request(package);
+        }        
+    }
+    else
+    {
+        //std::cout << "SRU OPERATION NOT SUPPORTED \n";
+        sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_explain_response);
+        
+        // TODO: make nice diagnostic return package 
+        package.session().close();
+        return;
+    }
 
+    //build_sru_debug_package(package);
+    build_sru_response(package, odr_en, soap, 
+                       sru_pdu_res, charset, stylesheet);
+    return;
+}
 
-//     int ret_code = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
-//     Z_SRW_PDU *sru_res = 0;
-//     Z_SOAP *soap_package = 0;
-//     char *charset = 0;
-//     Z_SRW_diagnostic *diagnostic = 0;
-//     int num_diagnostic = 0;
-//     mp::odr odr;
+
+bool yf::SRUtoZ3950::Impl::build_simple_explain(mp::Package &package, 
+                                               mp::odr &odr_en,
+                                               Z_SRW_PDU *sru_pdu_res,
+                                               Z_SRW_explainRequest 
+                                               const *er_req) const
+{
+    // z3950'fy recordPacking
+    int record_packing = Z_SRW_recordPacking_XML;
+    if (er_req && er_req->recordPacking && 's' == *(er_req->recordPacking))
+        record_packing = Z_SRW_recordPacking_string;
+
+    // getting database info
+    std::string database("Default");
+    if (er_req && er_req->database)
+        database = er_req->database;
+
+    // getting host and port info
+    std::string host = package.origin().listen_host();
+    std::string port = mp_util::to_string(package.origin().listen_port());
+
+    // overwriting host and port info if set from HTTP Host header
+    Z_GDU *zgdu_req = package.request().get();
+    if  (zgdu_req && zgdu_req->which == Z_GDU_HTTP_Request)
+    {
+        Z_HTTP_Request* http_req =  zgdu_req->u.HTTP_Request;
+        if (http_req)
+        {
+            std::string http_host_address
+                = mp_util::http_header_value(http_req->headers, "Host");
+
+            std::string::size_type i = http_host_address.rfind(":");
+            if (i != std::string::npos)
+            {
+                host.assign(http_host_address, 0, i);
+                port.assign(http_host_address, i + 1, std::string::npos);
+            }
+        }
+    }
+
+    // building SRU explain record
+    std::string explain_xml 
+        = mp_util::to_string(
+            "<explain>\n"
+            "  <serverInfo protocol='SRU'>\n"
+            "  <host>")
+        + host
+        + mp_util::to_string("</host>\n"
+            "  <port>")
+        + port
+        + mp_util::to_string("</port>\n"
+            "  <database>")
+        + database
+        + mp_util::to_string("</database>\n"
+            "  </serverInfo>\n"
+            "</explain>\n");
     
-//     if (!(ret_code = yaz_sru_decode(http_req, &sru_res, 
-//                                    &soap_package, odr, &charset,
-//                                    &diagnostic, &num_diagnostic)))
-//     {
-//         protocol = "SRU GET/POST";
-//     } 
-//     else if (!(ret_code = yaz_srw_decode(http_req, &sru_res, 
-//                                         &soap_package, odr, &charset)))
-//     {
-//         protocol = "SRU SOAP";
-//     }
-//    else
-//    {
-//        protocol = "HTTP";
-//    }
+    
+    // preparing explain record insert
+    Z_SRW_explainResponse *sru_res = sru_pdu_res->u.explain_response;
+    //sru_res->record 
+    //    = (Z_SRW_record *) odr_malloc(odr_en, sizeof(Z_SRW_record));
+    
+    // inserting one and only explain record
+    
+    sru_res->record.recordPosition = odr_intdup(odr_en, 1);
+    sru_res->record.recordPacking = record_packing;
+    sru_res->record.recordSchema = "http://explain.z3950.org/dtd/2.0/";
+    sru_res->record.recordData_len = 1 + explain_xml.size();
+    sru_res->record.recordData_buf
+        = odr_strdupn(odr_en, (const char *)explain_xml.c_str(), 
+                      1 + explain_xml.size());
 
-    std::string protocol("HTTP");
+    return true;
+};
 
-    const std::string mime_text_xml("text/xml");
-    const std::string mime_soap_xml("application/soap+xml");
-    const std::string mime_urlencoded("application/x-www-form-urlencoded");
 
-    const std::string http_method(http_req->method);
-    const std::string http_type(z_HTTP_header_lookup(http_req->headers, 
-                                                   "Content-Type"));
+bool yf::SRUtoZ3950::Impl::build_sru_debug_package(mp::Package &package) const
+{
+    Z_GDU *zgdu_req = package.request().get();
+    if  (zgdu_req && zgdu_req->which == Z_GDU_HTTP_Request)
+    {    
+        Z_HTTP_Request* http_req =  zgdu_req->u.HTTP_Request;
+        std::string content = mp_util::http_headers_debug(*http_req);
+        int http_code = 400;    
+        mp_util::http_response(package, content, http_code);
+        return true;
+    }
+    package.session().close();
+    return false;
+}
+
+
+bool yf::SRUtoZ3950::Impl::build_sru_response(mp::Package &package, 
+                                             mp::odr &odr_en,
+                                             Z_SOAP *soap,
+                                             const Z_SRW_PDU *sru_pdu_res,
+                                             char *charset,
+                                             const char *stylesheet) 
+    const
+{
+
+    // SRU request package translation to Z3950 package
+    //if (sru_pdu_res)
+    //    std::cout << *(const_cast<Z_SRW_PDU *>(sru_pdu_res)) << "\n";
+    //else
+    //    std::cout << "SRU empty\n";
+
     
+    Z_GDU *zgdu_req = package.request().get();
+    if  (zgdu_req && zgdu_req->which == Z_GDU_HTTP_Request)
+    {    
+        Z_GDU *zgdu_res //= z_get_HTTP_Response(odr_en, 200);
+            = odr_en.create_HTTP_Response(package.session(), 
+                                          zgdu_req->u.HTTP_Request, 
+                                          200);
+
+        // adding HTTP response code and headers
+        Z_HTTP_Response * http_res = zgdu_res->u.HTTP_Response;
+        //http_res->code = http_code;
+        
+        std::string ctype("text/xml");
+        if (charset){
+            ctype += "; charset=";
+            ctype += charset;
+        }
+
+        z_HTTP_header_add(odr_en, 
+                          &http_res->headers, "Content-Type", ctype.c_str());
+
+         // packaging Z_SOAP into HTML response
+         static Z_SOAP_Handler soap_handlers[4] = {
+              {"http://www.loc.gov/zing/srw/", 0,
+               (Z_SOAP_fun) yaz_srw_codec},
+              {"http://www.loc.gov/zing/srw/v1.0/", 0,
+               (Z_SOAP_fun) yaz_srw_codec},
+              {"http://www.loc.gov/zing/srw/update/", 0,
+               (Z_SOAP_fun) yaz_ucp_codec},
+              {0, 0, 0}
+          };
+
+
+         // empty stylesheet means NO stylesheet
+         if (stylesheet && *stylesheet == '\0')
+             stylesheet = 0;
+         
+         // encoding SRU package
+         
+         soap->u.generic->p  = (void*) sru_pdu_res;         
+         //int ret = 
+         z_soap_codec_enc_xsl(odr_en, &soap, 
+                              &http_res->content_buf, &http_res->content_len,
+                              soap_handlers, charset, stylesheet);
+         
+
+         package.response() = zgdu_res;
+         return true;
+    }
+    package.session().close();
+    return false;
+}
 
-    if (http_method == "GET")
-        protocol = "SRU GET";
-    else if ( http_method == "POST"
-              && http_type  == mime_urlencoded)
-        protocol = "SRU POST";
-    else if ( http_method == "POST"
-              && (http_type  == mime_text_xml
-                  || http_type  == mime_soap_xml))
-        protocol = "SRU SOAP";
+
+
+ Z_SRW_PDU * yf::SRUtoZ3950::Impl::decode_sru_request(mp::Package &package,
+                                                     mp::odr &odr_de,
+                                                     mp::odr &odr_en,
+                                                     Z_SRW_PDU *sru_pdu_res,
+                                                     Z_SOAP *&soap,
+                                                     char *charset,
+                                                     char *stylesheet) 
+     const
+{
+    Z_GDU *zgdu_req = package.request().get();
+    Z_SRW_PDU *sru_pdu_req = 0;
+
+    assert((zgdu_req->which == Z_GDU_HTTP_Request));
+    
+    //ignoring all non HTTP_Request packages
+    //if (!zgdu_req || !(zgdu_req->which == Z_GDU_HTTP_Request)){
+    //    return 0;
+    //}
     
-    std::cout << "SRUtoZ3950 " << protocol << "\n";
+    Z_HTTP_Request* http_req =  zgdu_req->u.HTTP_Request;
+    if (! http_req)
+        return 0;
 
-    package.move();
-    return;
+    //Z_SRW_PDU *sru_pdu_res_exp = yaz_srw_get(odr_en, Z_SRW_explain_response);
     
+    if (0 == yaz_sru_decode(http_req, &sru_pdu_req, &soap, 
+                            odr_de, &charset, 
+                            &(sru_pdu_res->u.response->diagnostics), 
+                            &(sru_pdu_res->u.response->num_diagnostics)))
+    {
+        if (sru_pdu_res->u.response->num_diagnostics)
+        {
+            //sru_pdu_res = sru_pdu_res_exp;
+            package.session().close();
+            return 0;
+        }
+        return sru_pdu_req;
+    }
+    else if (0 == yaz_srw_decode(http_req, &sru_pdu_req, &soap, 
+                                 odr_de, &charset))
+        return sru_pdu_req;
+    else 
+    {
+        //sru_pdu_res = sru_pdu_res_exp;
+        package.session().close();
+        return 0;
+    }
+    return 0;
+}
+
+bool 
+yf::SRUtoZ3950::Impl::check_sru_query_exists(mp::Package &package, 
+                                            mp::odr &odr_en,
+                                            Z_SRW_PDU *sru_pdu_res, 
+                                            Z_SRW_searchRetrieveRequest 
+                                                              const *sr_req)
+    const
+{
+    if( (sr_req->query_type == Z_SRW_query_type_cql && !sr_req->query.cql) )
+    {
+        yaz_add_srw_diagnostic(odr_en,
+                               &(sru_pdu_res->u.response->diagnostics), 
+                               &(sru_pdu_res->u.response->num_diagnostics), 
+                               7, "query");
+        yaz_add_srw_diagnostic(odr_en,
+                               &(sru_pdu_res->u.response->diagnostics), 
+                               &(sru_pdu_res->u.response->num_diagnostics), 
+                               10, "CQL query is empty");
+        return false;
+    }
+    if( (sr_req->query_type == Z_SRW_query_type_xcql && !sr_req->query.xcql) )
+    {
+         yaz_add_srw_diagnostic(odr_en,
+                               &(sru_pdu_res->u.response->diagnostics), 
+                               &(sru_pdu_res->u.response->num_diagnostics), 
+                               10, "XCQL query is empty");
+         return false;
+   }
+    if( (sr_req->query_type == Z_SRW_query_type_pqf && !sr_req->query.pqf) )
+    {
+        yaz_add_srw_diagnostic(odr_en,
+                               &(sru_pdu_res->u.response->diagnostics), 
+                               &(sru_pdu_res->u.response->num_diagnostics), 
+                               10, "PQF query is empty");
+        return false;
+    }
+    return true;
+};
+
+
+
+bool 
+yf::SRUtoZ3950::Impl::z3950_init_request(mp::Package &package, 
+                                             const std::string &database) const
+{
+    // prepare Z3950 package
+    //Session s;
+    //Package z3950_package(s, package.origin());
+    Package z3950_package(package.session(), package.origin());
+    z3950_package.copy_filter(package);
+
+    // set initRequest APDU
+    mp::odr odr_en(ODR_ENCODE);
+    Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_initRequest);
+    Z_InitRequest *init_req = apdu->u.initRequest;
+    //TODO: add user name in apdu
+    //TODO: add user passwd in apdu
+    //init_req->idAuthentication = org_init->idAuthentication;
+    //init_req->implementationId = "IDxyz";
+    //init_req->implementationName = "NAMExyz";
+    //init_req->implementationVersion = "VERSIONxyz";
+
+    ODR_MASK_SET(init_req->options, Z_Options_search);
+    ODR_MASK_SET(init_req->options, Z_Options_present);
+    ODR_MASK_SET(init_req->options, Z_Options_namedResultSets);
+    ODR_MASK_SET(init_req->options, Z_Options_scan);
+
+    ODR_MASK_SET(init_req->protocolVersion, Z_ProtocolVersion_1);
+    ODR_MASK_SET(init_req->protocolVersion, Z_ProtocolVersion_2);
+    ODR_MASK_SET(init_req->protocolVersion, Z_ProtocolVersion_3);
+
+    z3950_package.request() = apdu;
+
+    // send Z3950 package
+    // std::cout << "z3950_init_request " << *apdu <<"\n";
+    z3950_package.move();
+
+    // dead Z3950 backend detection
+    if (z3950_package.session().is_closed()){
+        package.session().close();
+        return false;
+    }
+
+    // check successful initResponse
+    Z_GDU *z3950_gdu = z3950_package.response().get();
+
+    if (z3950_gdu && z3950_gdu->which == Z_GDU_Z3950 
+        && z3950_gdu->u.z3950->which == Z_APDU_initResponse)
+         return true;
+ 
+    return false;
+}
+
+bool 
+yf::SRUtoZ3950::Impl::z3950_close_request(mp::Package &package) const
+{
+    // close SRU package
+    package.session().close();
+
+    // prepare and close Z3950 package 
+    Package z3950_package(package.session(), package.origin());
+    z3950_package.copy_filter(package);
+    z3950_package.session().close();
+
+    // set close APDU
+    //mp::odr odr_en(ODR_ENCODE);
+    //Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_close);
+    //z3950_package.request() = apdu;
+
+    z3950_package.move();
+
+    // check successful close response
+    //Z_GDU *z3950_gdu = z3950_package.response().get();
+    //if (z3950_gdu && z3950_gdu->which == Z_GDU_Z3950 
+    //    && z3950_gdu->u.z3950->which == Z_APDU_close)
+    //    return true;
+
+    if (z3950_package.session().is_closed()){
+        return true;
+    }
+    return false;
+}
+
+bool 
+yf::SRUtoZ3950::Impl::z3950_search_request(mp::Package &package,  
+                                          mp::odr &odr_en,
+                                          Z_SRW_PDU *sru_pdu_res,
+                                          Z_SRW_searchRetrieveRequest 
+                                          const *sr_req) const
+{
+
+    assert(sru_pdu_res->u.response);
+
+    Package z3950_package(package.session(), package.origin());
+    z3950_package.copy_filter(package);
+
+    //add stuff in z3950 apdu
+    Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_searchRequest);
+    Z_SearchRequest *z_searchRequest = apdu->u.searchRequest;
+
+    // z3950'fy database
+    z_searchRequest->num_databaseNames = 1;
+    z_searchRequest->databaseNames = (char**)
+        odr_malloc(odr_en, sizeof(char *));
+
+    if (sr_req->database)
+        z_searchRequest->databaseNames[0] 
+            = odr_strdup(odr_en, const_cast<char *>(sr_req->database));
+    else
+        z_searchRequest->databaseNames[0] 
+            = odr_strdup(odr_en, "Default");
+
+
+    // z3950'fy query
+    Z_Query *z_query = (Z_Query *) odr_malloc(odr_en, sizeof(Z_Query));
+    z_searchRequest->query = z_query;
+ 
+    if (!z3950_build_query(odr_en, z_query, 
+                           (const SRW_query&)sr_req->query, 
+                           sr_req->query_type))
+    {    
+        yaz_add_srw_diagnostic(odr_en,
+                               &(sru_pdu_res->u.response->diagnostics), 
+                               &(sru_pdu_res->u.response->num_diagnostics), 
+                               7, "query");
+        return false;
+    }
+
+    z3950_package.request() = apdu;
+    //std::cout << "z3950_search_request " << *apdu << "\n";
+        
+    z3950_package.move();
+
+
+    Z_GDU *z3950_gdu = z3950_package.response().get();
+    //std::cout << "z3950_search_request " << *z3950_gdu << "\n";
+
+    //TODO: check success condition
+
+    //int yaz_diag_bib1_to_srw (int bib1_code);
+    //int yaz_diag_srw_to_bib1(int srw_code);
+    //Se kode i src/seshigh.c (srw_bend_search, srw_bend_init).
+
+    if (z3950_gdu && z3950_gdu->which == Z_GDU_Z3950 
+        && z3950_gdu->u.z3950->which == Z_APDU_searchResponse
+        && z3950_gdu->u.z3950->u.searchResponse->searchStatus)
+    {
+
+        Z_SearchResponse *sr = z3950_gdu->u.z3950->u.searchResponse;
+        if (sr)
+        {
+            // srw'fy number of records
+            sru_pdu_res->u.response->numberOfRecords 
+                = (int *) odr_malloc(odr_en, sizeof(int *));
+            *(sru_pdu_res->u.response->numberOfRecords) = *(sr->resultCount);
+
+            // srw'fy nextRecordPosition
+            //sru_pdu_res->u.response->nextRecordPosition 
+            //    = (int *) odr_malloc(odr_en, sizeof(int *));
+            //*(sru_pdu_res->u.response->nextRecordPosition) = 1;
+
+        }
+
+        return true;
+    }
     
+    return false;
+}
+
+bool 
+yf::SRUtoZ3950::Impl::z3950_present_request(mp::Package &package, 
+                                           mp::odr &odr_en,
+                                           Z_SRW_PDU *sru_pdu_res,
+                                           Z_SRW_searchRetrieveRequest 
+                                           const *sr_req)
+    const
+{
+    assert(sru_pdu_res->u.response);
+
+    if (!sr_req)
+        return false;
 
-    std::string message("<html>\n<body>\n<h1>"
-                        "Metaproxy SRUtoZ3950 filter"
-                        "</h1>\n");
+    
+    // no need to work if nobody wants record ..
+    if (!(sr_req->maximumRecords) || 0 == *(sr_req->maximumRecords))
+        return true;
 
-    message += "<h3>HTTP Info</h3><br/>\n";
-    message += "<p>\n";
-    message += "<b>Method: </b> " + std::string(http_req->method) + "<br/>\n";
-    message += "<b>Version:</b> " + std::string(http_req->version) + "<br/>\n";
-    message += "<b>Path:   </b> " + std::string(http_req->path) + "<br/>\n";
-    message += "<b>Content-Type:</b>"
-        + std::string(z_HTTP_header_lookup(http_req->headers, "Content-Type"))
-        + "<br/>\n";
-    message += "<b>Content-Length:</b>"
-        + std::string(z_HTTP_header_lookup(http_req->headers, 
-                                           "Content-Length"))
-        + "<br/>\n";
-    message += "</p>\n";    
+    bool send_z3950_present = true;
 
-    message += "<h3>Headers</h3><br/>\n";
-    message += "<p>\n";    
-    Z_HTTP_Header* header = http_req->headers;
-    while (header){
-          message += "<b>Header: </b> <i>" 
-              + std::string(header->name) + ":</i> "
-              + std::string(header->value) + "<br/>\n";
-          header = header->next;
+    // recordXPath unsupported.
+    if (sr_req->recordXPath)
+    {
+        send_z3950_present = false;
+        yaz_add_srw_diagnostic(odr_en,
+                               &(sru_pdu_res->u.response->diagnostics), 
+                               &(sru_pdu_res->u.response->num_diagnostics), 
+                               72, 0);
     }
-    message += "</p>\n";    
-    message += "</body>\n</html>\n";
+    
+    // resultSetTTL unsupported.
+    // resultSetIdleTime in response
+    if (sr_req->resultSetTTL)
+    {
+        send_z3950_present = false;
+        yaz_add_srw_diagnostic(odr_en,
+                               &(sru_pdu_res->u.response->diagnostics), 
+                               &(sru_pdu_res->u.response->num_diagnostics), 
+                               50, 0);
+    }
+    
+    // sort unsupported
+    if (sr_req->sort_type != Z_SRW_sort_type_none)
+    {
+        send_z3950_present = false;
+        yaz_add_srw_diagnostic(odr_en,
+                               &(sru_pdu_res->u.response->diagnostics), 
+                               &(sru_pdu_res->u.response->num_diagnostics), 
+                               80, 0);
+    }
+    
+    // start record requested negative, or larger than number of records
+    if (sr_req->startRecord 
+        && 
+        ((*(sr_req->startRecord) < 0)       // negative
+         ||
+         (sru_pdu_res->u.response->numberOfRecords  //out of range
+          && *(sr_req->startRecord) 
+          > *(sru_pdu_res->u.response->numberOfRecords))
+        ))
+    {
+        send_z3950_present = false;
+        yaz_add_srw_diagnostic(odr_en,
+                               &(sru_pdu_res->u.response->diagnostics), 
+                               &(sru_pdu_res->u.response->num_diagnostics), 
+                               61, 0);
+    }    
+
+    // maximumRecords requested negative
+    if (sr_req->maximumRecords
+        && *(sr_req->maximumRecords) < 0) 
+          
+    {
+        send_z3950_present = false;
+        yaz_add_srw_diagnostic(odr_en,
+                               &(sru_pdu_res->u.response->diagnostics), 
+                               &(sru_pdu_res->u.response->num_diagnostics), 
+                               6, "maximumRecords");
+    }    
+
+    // exit on all these above diagnostics
+    if (!send_z3950_present)
+        return false;
 
-    //std::cout << message << "\n";
+    // now packaging the z3950 present request
+    Package z3950_package(package.session(), package.origin());
+    z3950_package.copy_filter(package); 
+    Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_presentRequest);
+
+    assert(apdu->u.presentRequest);
+
+    // z3950'fy start record position
+    if (sr_req->startRecord)
+        *(apdu->u.presentRequest->resultSetStartPoint) 
+            = *(sr_req->startRecord);
+    else 
+        *(apdu->u.presentRequest->resultSetStartPoint) = 1;
     
+    // z3950'fy number of records requested 
+    // protect against requesting records out of range
+    if (sr_req->maximumRecords)
+        *(apdu->u.presentRequest->numberOfRecordsRequested) 
+            = std::min(*(sr_req->maximumRecords), 
+                  *(sru_pdu_res->u.response->numberOfRecords)
+                  - *(apdu->u.presentRequest->resultSetStartPoint)
+                  + 1);
+     
+    // z3950'fy recordPacking
+    int record_packing = Z_SRW_recordPacking_XML;
+    if (sr_req->recordPacking && 's' == *(sr_req->recordPacking))
+        record_packing = Z_SRW_recordPacking_string;
 
+    // RecordSyntax will always be XML
+    (apdu->u.presentRequest->preferredRecordSyntax)
+        = yaz_oidval_to_z3950oid (odr_en, CLASS_RECSYN, VAL_TEXT_XML);
 
-    // sending Z3950 package through pipeline
-    package.move();
+    // z3950'fy record schema
+     if (sr_req->recordSchema)
+     {
+         apdu->u.presentRequest->recordComposition 
+             = (Z_RecordComposition *) 
+               odr_malloc(odr_en, sizeof(Z_RecordComposition));
+         apdu->u.presentRequest->recordComposition->which 
+             = Z_RecordComp_simple;
+         apdu->u.presentRequest->recordComposition->u.simple 
+             = build_esn_from_schema(odr_en, 
+                                     (const char *) sr_req->recordSchema); 
+     }
 
+    // z3950'fy time to live - flagged as diagnostics above
+    //if (sr_req->resultSetTTL)
 
-    // TODO: Z3950 response parsing and translation to SRU package
-    //Z_HTTP_Response* http_res = 0;
+    // attaching Z3950 package to filter chain
+    z3950_package.request() = apdu;
 
+    //std::cout << "z3950_present_request " << *apdu << "\n";   
+    z3950_package.move();
 
-    Z_GDU *zgdu_res = 0; 
-    mp::odr odr; 
-    zgdu_res 
-       = odr.create_HTTP_Response(package.session(), 
-                                  zgdu_req->u.HTTP_Request, 200);
+    //check successful Z3950 present response
+    Z_GDU *z3950_gdu = z3950_package.response().get();
+    if (!z3950_gdu || z3950_gdu->which != Z_GDU_Z3950 
+        || z3950_gdu->u.z3950->which != Z_APDU_presentResponse
+        || !z3950_gdu->u.z3950->u.presentResponse)
 
+    {
+        yaz_add_srw_diagnostic(odr_en,
+                               &(sru_pdu_res->u.response->diagnostics), 
+                               &(sru_pdu_res->u.response->num_diagnostics), 
+                               2, 0);
+        package.session().close();
+        return false;
+    }
+    
+
+    // everything fine, continuing
+    //std::cout << "z3950_present_request OK\n";
+
+    Z_PresentResponse *pr = z3950_gdu->u.z3950->u.presentResponse;
+    Z_SRW_searchRetrieveResponse *sru_res = sru_pdu_res->u.response;
         
-//     zgdu_res->u.HTTP_Response->content_len = message.size();
+    // checking non surrogate dioagnostics in Z3950 present response package
+    if (pr->records 
+        && pr->records->which == Z_Records_NSD
+        && pr->records->u.nonSurrogateDiagnostic)
+    {
+        //int http_code =
+        z3950_to_srw_diag(odr_en, sru_res, 
+                          pr->records->u.nonSurrogateDiagnostic);
+        return false;
+    }
+    
+    // copy all records if existing
+    if (pr->records && pr->records->which == Z_Records_DBOSD)
+    {
+        // srw'fy number of returned records
+        sru_res->num_records
+            = pr->records->u.databaseOrSurDiagnostics->num_records;
+        
+        sru_res->records 
+            = (Z_SRW_record *) odr_malloc(odr_en, 
+                                          sru_res->num_records 
+                                             * sizeof(Z_SRW_record));
+        
+
+        // srw'fy nextRecordPosition
+        // next position never zero or behind the last z3950 record 
+        if (pr->nextResultSetPosition
+            && *(pr->nextResultSetPosition) > 0 
+            && *(pr->nextResultSetPosition) 
+               <= *(sru_pdu_res->u.response->numberOfRecords))
+            sru_res->nextRecordPosition 
+                = odr_intdup(odr_en, *(pr->nextResultSetPosition));
+        
+        // inserting all records
+        for (int i = 0; i < sru_res->num_records; i++)
+        {
+            Z_NamePlusRecord *npr 
+                = pr->records->u.databaseOrSurDiagnostics->records[i];
+            
+            sru_res->records[i].recordPosition 
+                = odr_intdup(odr_en, 
+                             i + *(apdu->u.presentRequest->resultSetStartPoint));
+            
+            sru_res->records[i].recordPacking = record_packing;
+            
+            if (npr->which != Z_NamePlusRecord_databaseRecord)
+            {
+                sru_res->records[i].recordSchema = "diagnostic";
+                sru_res->records[i].recordData_buf = "67";
+                sru_res->records[i].recordData_len = 2;
+            }
+            else
+            {
+                Z_External *r = npr->u.databaseRecord;
+                oident *ent = oid_getentbyoid(r->direct_reference);
+                if (r->which == Z_External_octet 
+                    && ent->value == VAL_TEXT_XML)
+                {
+                    sru_res->records[i].recordSchema = "dc";
+                    sru_res->records[i].recordData_buf
+                        = odr_strdupn(odr_en, 
+                                      (const char *)r->u.octet_aligned->buf, 
+                                      r->u.octet_aligned->len);
+                    sru_res->records[i].recordData_len 
+                        = r->u.octet_aligned->len;
+                }
+                else
+                {
+                    sru_res->records[i].recordSchema = "diagnostic";
+                    sru_res->records[i].recordData_buf = "67";
+                    sru_res->records[i].recordData_len = 2;
+                }
+            }   
+        }    
+    }
+    
+    return true;
+}
+
+bool 
+yf::SRUtoZ3950::Impl::z3950_scan_request(mp::Package &package,
+                                        mp::odr &odr_en,
+                                        Z_SRW_PDU *sru_pdu_res,
+                                        Z_SRW_scanRequest const *sr_req) const 
+{
+    assert(sru_pdu_res->u.scan_response);
+
+    Package z3950_package(package.session(), package.origin());
+    z3950_package.copy_filter(package); 
+    //mp::odr odr_en(ODR_ENCODE);
+    Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_scanRequest);
+
+    //TODO: add stuff in apdu
+    Z_ScanRequest *z_scanRequest = apdu->u.scanRequest;
+
+    // database repackaging
+    z_scanRequest->num_databaseNames = 1;
+    z_scanRequest->databaseNames = (char**)
+        odr_malloc(odr_en, sizeof(char *));
+    if (sr_req->database)
+        z_scanRequest->databaseNames[0] 
+            = odr_strdup(odr_en, const_cast<char *>(sr_req->database));
+    else
+        z_scanRequest->databaseNames[0] 
+            = odr_strdup(odr_en, "Default");
+
+
+    // query repackaging
+    // CQL or XCQL scan is not possible in Z3950, flagging a diagnostic
+    if (sr_req->query_type != Z_SRW_query_type_pqf)
+    {        
+        //send_to_srw_client_error(7, "query");
+        return false;
+    }
+
+    // PQF query repackaging
+    // need to use Z_AttributesPlusTerm structure, not Z_Query
+    // this can be digget out of a 
+    // Z_query->type1(Z_RPNQuery)->RPNStructure(Z_RPNStructure)
+    //   ->u.simple(Z_Operand)->u.attributesPlusTerm(Z_AttributesPlusTerm )
+
+    //Z_Query *z_query = (Z_Query *) odr_malloc(odr_en, sizeof(Z_Query));
+    //z_searchRequest->query = z_query;
+
+    //if (!z3950_build_query(odr_en, z_query, 
+    //                       (const SRW_query&)sr_req->query, 
+    //                       sr_req->query_type))
+    //{    
+        //send_to_srw_client_error(7, "query");
+    //    return false;
+    //}
+
+    // TODO: 
+
+    z3950_package.request() = apdu;
+    std::cout << "z3950_scan_request " << *apdu << "\n";   
+
+    z3950_package.move();
+    //TODO: check success condition
+    return true;
+    return false;
+}
+
+bool yf::SRUtoZ3950::Impl::z3950_build_query(mp::odr &odr_en, Z_Query *z_query, 
+                                            const SRW_query &query, 
+                                            SRW_query_type query_type) const
+{        
+    if (query_type == Z_SRW_query_type_cql)
+    {
+        Z_External *ext = (Z_External *) 
+            odr_malloc(odr_en, sizeof(*ext));
+        ext->direct_reference = 
+            odr_getoidbystr(odr_en, "1.2.840.10003.16.2");
+        ext->indirect_reference = 0;
+        ext->descriptor = 0;
+        ext->which = Z_External_CQL;
+        ext->u.cql = const_cast<char *>(query.cql);
+        
+        z_query->which = Z_Query_type_104;
+        z_query->u.type_104 =  ext;
+        return true;
+    }
+
+    if (query_type == Z_SRW_query_type_pqf)
+    {
+        Z_RPNQuery *RPNquery;
+        YAZ_PQF_Parser pqf_parser;
+        
+        pqf_parser = yaz_pqf_create ();
+        
+        RPNquery = yaz_pqf_parse (pqf_parser, odr_en, query.pqf);
+        if (!RPNquery)
+        {
+            std::cout << "TODO: Handeling of bad PQF\n";
+            std::cout << "TODO: Diagnostic to be send\n";
+        }
+        z_query->which = Z_Query_type_1;
+        z_query->u.type_1 =  RPNquery;
+        
+        yaz_pqf_destroy(pqf_parser);
+        return true;
+    }
+    return false;
+}
+
+
+// std::string 
+// yf::SRUtoZ3950::Impl::sru_protocol(const Z_HTTP_Request &http_req) const
+// {
+//     const std::string mime_urlencoded("application/x-www-form-urlencoded");
+//     const std::string mime_text_xml("text/xml");
+//     const std::string mime_soap_xml("application/soap+xml");
+
+//     const std::string http_method(http_req.method);
+//     const std::string http_type 
+//         =  mp_util::http_header_value(http_req.headers, "Content-Type");
+
+//     if (http_method == "GET")
+//         return "SRU GET";
+
+//     if (http_method == "POST"
+//               && http_type  == mime_urlencoded)
+//         return "SRU POST";
+    
+//     if ( http_method == "POST"
+//          && (http_type  == mime_text_xml
+//              || http_type  == mime_soap_xml))
+//         return "SRU SOAP";
+
+//     return "HTTP";
+// }
+
+// std::string 
+// yf::SRUtoZ3950::Impl::debug_http(const Z_HTTP_Request &http_req) const
+// {
+//     std::string message("<html>\n<body>\n<h1>"
+//                         "Metaproxy SRUtoZ3950 filter"
+//                         "</h1>\n");
+    
+//     message += "<h3>HTTP Info</h3><br/>\n";
+//     message += "<p>\n";
+//     message += "<b>Method: </b> " + std::string(http_req.method) + "<br/>\n";
+//     message += "<b>Version:</b> " + std::string(http_req.version) + "<br/>\n";
+//     message += "<b>Path:   </b> " + std::string(http_req.path) + "<br/>\n";
+
+//     message += "<b>Content-Type:</b>"
+//         + mp_util::http_header_value(http_req.headers, "Content-Type")
+//         + "<br/>\n";
+//     message += "<b>Content-Length:</b>"
+//         + mp_util::http_header_value(http_req.headers, "Content-Length")
+//         + "<br/>\n";
+//     message += "</p>\n";    
+    
+//     message += "<h3>Headers</h3><br/>\n";
+//     message += "<p>\n";    
+//     Z_HTTP_Header* header = http_req.headers;
+//     while (header){
+//         message += "<b>Header: </b> <i>" 
+//             + std::string(header->name) + ":</i> "
+//             + std::string(header->value) + "<br/>\n";
+//         header = header->next;
+//     }
+//     message += "</p>\n";    
+//     message += "</body>\n</html>\n";
+//     return message;
+// }
+
+// void yf::SRUtoZ3950::Impl::http_response(metaproxy_1::Package &package, 
+//                                         const std::string &content, 
+//                                         int http_code) const
+// {
+
+//     Z_GDU *zgdu_req = package.request().get(); 
+//     Z_GDU *zgdu_res = 0; 
+//     mp::odr odr;
+//     zgdu_res 
+//        = odr.create_HTTP_Response(package.session(), 
+//                                   zgdu_req->u.HTTP_Request, 
+//                                   http_code);
+        
+//     zgdu_res->u.HTTP_Response->content_len = content.size();
 //     zgdu_res->u.HTTP_Response->content_buf 
 //         = (char*) odr_malloc(odr, zgdu_res->u.HTTP_Response->content_len);
-
+    
 //     strncpy(zgdu_res->u.HTTP_Response->content_buf, 
-//             message.c_str(),  zgdu_res->u.HTTP_Response->content_len);
+//             content.c_str(),  zgdu_res->u.HTTP_Response->content_len);
     
-        // z_HTTP_header_add(o, &hres->headers,
-        //            "Content-Type", content_type.c_str());
+//     //z_HTTP_header_add(odr, &hres->headers,
+//     //                  "Content-Type", content_type.c_str());
+//     package.response() = zgdu_res;
+// }
 
-    package.response() = zgdu_res;
 
+Z_ElementSetNames * 
+yf::SRUtoZ3950::Impl::build_esn_from_schema(mp::odr &odr_en, 
+                                           const char *schema) const
+{
+  if (!schema)
+        return 0;
+  
+    Z_ElementSetNames *esn 
+        = (Z_ElementSetNames *) odr_malloc(odr_en, sizeof(Z_ElementSetNames));
+    esn->which = Z_ElementSetNames_generic;
+    esn->u.generic = odr_strdup(odr_en, schema);
+    return esn; 
 }
 
+int 
+yf::SRUtoZ3950::Impl::z3950_to_srw_diag(mp::odr &odr_en, 
+                                       Z_SRW_searchRetrieveResponse *sru_res,
+                                       Z_DefaultDiagFormat *ddf) const
+{
+    int bib1_code = *ddf->condition;
+    if (bib1_code == 109)
+        return 404;
+    sru_res->num_diagnostics = 1;
+    sru_res->diagnostics = (Z_SRW_diagnostic *)
+        odr_malloc(odr_en, sizeof(*sru_res->diagnostics));
+    yaz_mk_std_diagnostic(odr_en, sru_res->diagnostics,
+                          yaz_diag_bib1_to_srw(*ddf->condition), 
+                          ddf->u.v2Addinfo);
+    return 0;
+}
+
+
 
 static mp::filter::Base* filter_creator()
 {
@@ -203,7 +1144,7 @@ static mp::filter::Base* filter_creator()
 extern "C" {
     struct metaproxy_1_filter_struct metaproxy_1_filter_sru_to_z3950 = {
         0,
-        "SRUtoZ3950",
+        "sru_z3950",
         filter_creator
     };
 }