+ if (m_p->content_tmp_file.length())
+ tmp_file = m_p->content_tmp_file;
+
+ if (m_p->content_config_file.length())
+ {
+ FILE *inf = fopen(m_p->content_config_file.c_str(), "r");
+ if (inf)
+ {
+ char buf[1024];
+ while (fgets(buf, sizeof(buf)-1, inf))
+ {
+ char *cp;
+ cp = strchr(buf, '#');
+ if (cp)
+ *cp = '\0';
+ cp = strchr(buf, '\n');
+ if (cp)
+ *cp = '\0';
+ cp = strchr(buf, ':');
+ if (cp)
+ {
+ char *cp1 = cp;
+ while (cp1 != buf && cp1[-1] == ' ')
+ cp1--;
+ *cp1 = '\0';
+ cp++;
+ while (*cp == ' ')
+ cp++;
+ if (!strcmp(buf, "proxyhostname"))
+ proxyhostname = cp;
+ if (!strcmp(buf, "sessiondir") && *cp)
+ {
+ if (cp[strlen(cp)-1] == '/')
+ cp[strlen(cp)-1] = '\0';
+ tmp_file = std::string(cp) + std::string("/cf.XXXXXX.p");
+ }
+ }
+ }
+ fclose(inf);
+ }
+ else
+ {
+ package.log("zoom", YLOG_WARN|YLOG_ERRNO,
+ "unable to open content config %s",
+ m_p->content_config_file.c_str());
+ *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
+ *addinfo = (char *) odr_malloc(odr, 70 + tmp_file.length());
+ sprintf(*addinfo, "zoom: unable to open content config %s",
+ m_p->content_config_file.c_str());
+ return false;
+ }
+ }
+
+ if (proxyhostname.length() == 0)
+ {
+ package.log("zoom", YLOG_WARN, "no proxyhostname");
+ return true;
+ }
+ if (tmp_file.length() == 0)
+ {
+ package.log("zoom", YLOG_WARN, "no tmp_file");
+ return true;
+ }
+
+ char *fname = xstrdup(tmp_file.c_str());
+ char *xx = strstr(fname, "XXXXXX");
+ if (!xx)
+ {
+ package.log("zoom", YLOG_WARN, "bad tmp_file %s", tmp_file.c_str());
+ *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
+ *addinfo = (char *) odr_malloc(odr, 60 + tmp_file.length());
+ sprintf(*addinfo, "zoom: bad format of content tmp_file: %s",
+ tmp_file.c_str());
+ xfree(fname);
+ return false;
+ }
+ char tmp_char = xx[6];
+ sprintf(xx, "%06d", ((unsigned) rand()) % 1000000);
+ if (legacy_format)
+ b->cproxy_host = std::string(xx) + "." + proxyhostname;
+ else
+ b->cproxy_host = proxyhostname + "/" + xx;
+ xx[6] = tmp_char;
+
+ FILE *file = fopen(fname, "w");
+ if (!file)
+ {
+ package.log("zoom", YLOG_WARN|YLOG_ERRNO, "create %s", fname);
+ *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
+ *addinfo = (char *) odr_malloc(odr, 50 + strlen(fname));
+ sprintf(*addinfo, "zoom: could not create %s", fname);
+ xfree(fname);
+ return false;
+ }
+ mp::wrbuf w;
+ wrbuf_puts(w, "#content_proxy\n");
+ wrbuf_printf(w, "connector: %s\n", b->sptr->contentConnector.c_str());
+ if (authentication.length())
+ wrbuf_printf(w, "auth: %s\n", authentication.c_str());
+ if (proxy.length())
+ wrbuf_printf(w, "proxy: %s\n", proxy.c_str());
+ if (realm.length())
+ wrbuf_printf(w, "realm: %s\n", realm.c_str());
+
+ fwrite(w.buf(), 1, w.len(), file);
+ fclose(file);
+ package.log("zoom", YLOG_LOG, "content file: %s", fname);
+ xfree(fname);
+ }
+ return true;
+}
+
+yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
+ mp::Package &package,
+ std::string &database, int *error, char **addinfo, mp::odr &odr,
+ int *proxy_step)
+{
+ bool connection_reuse = false;
+ std::string proxy;
+
+ std::list<BackendPtr>::const_iterator map_it;
+ if (m_backend && !m_backend->enable_explain &&
+ m_backend->m_frontend_database == database)
+ {
+ connection_reuse = true;
+ proxy = m_backend->m_proxy;
+ }
+
+ std::string input_args;
+ std::string torus_db;
+ size_t db_arg_pos = database.find(',');
+ if (db_arg_pos != std::string::npos)
+ {
+ torus_db = database.substr(0, db_arg_pos);
+ input_args = database.substr(db_arg_pos + 1);
+ }
+ else
+ torus_db = database;
+
+ std::string authentication;
+ std::string content_authentication;
+ std::string content_proxy;
+ std::string realm = session_realm;
+ if (realm.length() == 0)
+ realm = m_p->default_realm;
+
+ const char *param_user = 0;
+ const char *param_password = 0;
+ const char *param_content_user = 0;
+ const char *param_content_password = 0;
+ const char *param_nocproxy = 0;
+ int no_parms = 0;
+
+ char **names;
+ char **values;
+ int no_out_args = 0;
+ if (input_args.length())
+ no_parms = yaz_uri_to_array(input_args.c_str(),
+ odr, &names, &values);
+ // adding 10 because we'll be adding other URL args
+ const char **out_names = (const char **)
+ odr_malloc(odr, (10 + no_parms) * sizeof(*out_names));
+ const char **out_values = (const char **)
+ odr_malloc(odr, (10 + no_parms) * sizeof(*out_values));
+
+ // may be changed if it's a content connection
+ std::string torus_url = m_p->torus_searchable_url;
+ int i;
+ for (i = 0; i < no_parms; i++)
+ {
+ const char *name = names[i];
+ const char *value = values[i];
+ assert(name);
+ assert(value);
+ if (!strcmp(name, "user"))
+ param_user = value;
+ else if (!strcmp(name, "password"))
+ param_password = value;
+ else if (!strcmp(name, "content-user"))
+ param_content_user = value;
+ else if (!strcmp(name, "content-password"))
+ param_content_password = value;
+ else if (!strcmp(name, "content-proxy"))
+ content_proxy = value;
+ else if (!strcmp(name, "nocproxy"))
+ param_nocproxy = value;
+ else if (!strcmp(name, "proxy"))
+ {
+ char **dstr;
+ int dnum = 0;
+ nmem_strsplit(((ODR) odr)->mem, ",", value, &dstr, &dnum);
+ if (connection_reuse)
+ {
+ // find the step after our current proxy
+ int i;
+ for (i = 0; i < dnum; i++)
+ if (!strcmp(proxy.c_str(), dstr[i]))
+ break;
+ if (i >= dnum - 1)
+ *proxy_step = 0;
+ else
+ *proxy_step = i + 1;
+ }
+ else
+ {
+ // step is known.. Guess our proxy from it
+ if (*proxy_step >= dnum)
+ *proxy_step = 0;
+ else
+ {
+ proxy = dstr[*proxy_step];
+
+ (*proxy_step)++;
+ if (*proxy_step == dnum)
+ *proxy_step = 0;
+ }
+ }
+ }
+ else if (!strcmp(name, "cproxysession"))
+ {
+ out_names[no_out_args] = name;
+ out_values[no_out_args++] = value;
+ torus_url = m_p->torus_content_url;
+ }
+ else if (!strcmp(name, "realm") && session_realm.length() == 0)
+ realm = value;
+ else if (!strcmp(name, "torus_url") && session_realm.length() == 0)
+ torus_url = value;
+ else if (name[0] == 'x' && name[1] == '-')
+ {
+ out_names[no_out_args] = name;
+ out_values[no_out_args++] = value;
+ }
+ else
+ {
+ BackendPtr notfound;
+ char *msg = (char*) odr_malloc(odr, strlen(name) + 30);
+ *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
+ sprintf(msg, "zoom: bad database argument: %s", name);
+ *addinfo = msg;
+ return notfound;
+ }
+ }
+ if (proxy.length())
+ package.log("zoom", YLOG_LOG, "proxy: %s", proxy.c_str());
+
+ if (connection_reuse)
+ {
+ m_backend->connect("", error, addinfo, odr);
+ return m_backend;
+ }
+
+ if (param_user)
+ {
+ authentication = std::string(param_user);
+ if (param_password)
+ authentication += "/" + std::string(param_password);
+ }
+ if (param_content_user)
+ {
+ content_authentication = std::string(param_content_user);
+ if (param_content_password)
+ content_authentication += "/" + std::string(param_content_password);
+ }
+
+ if (torus_db.compare("IR-Explain---1") == 0)
+ return explain_search(package, database, error, addinfo, odr, torus_url,
+ torus_db, realm);
+
+ SearchablePtr sptr;
+
+ std::map<std::string,SearchablePtr>::iterator it;
+ it = m_p->s_map.find(torus_db);
+ if (it != m_p->s_map.end())
+ sptr = it->second;
+ else if (torus_url.length() > 0)
+ {
+ std::string torus_query = "udb==" + torus_db;
+ xmlDoc *doc = mp::get_searchable(package,torus_url, torus_db,
+ torus_query,
+ realm, m_p->proxy);
+ if (!doc)
+ {
+ *error = YAZ_BIB1_UNSPECIFIED_ERROR;
+ *addinfo = odr_strdup(odr, "Torus server unavailable or "
+ "incorrectly configured");
+ BackendPtr b;
+ return b;
+ }
+ const xmlNode *ptr = xmlDocGetRootElement(doc);
+ if (ptr && ptr->type == XML_ELEMENT_NODE)
+ {
+ if (!strcmp((const char *) ptr->name, "record"))
+ {
+ sptr = m_p->parse_torus_record(ptr);
+ }
+ else if (!strcmp((const char *) ptr->name, "records"))
+ {
+ for (ptr = ptr->children; ptr; ptr = ptr->next)
+ {
+ if (ptr->type == XML_ELEMENT_NODE
+ && !strcmp((const char *) ptr->name, "record"))
+ {
+ if (sptr)
+ {
+ *error = YAZ_BIB1_UNSPECIFIED_ERROR;
+ *addinfo = (char*)
+ odr_malloc(odr, 40 + torus_db.length());
+ sprintf(*addinfo, "multiple records for udb=%s",
+ database.c_str());
+ xmlFreeDoc(doc);
+ BackendPtr b;
+ return b;
+ }
+ sptr = m_p->parse_torus_record(ptr);
+ }
+ }
+ }
+ else
+ {
+ *error = YAZ_BIB1_UNSPECIFIED_ERROR;
+ *addinfo = (char*) odr_malloc(
+ odr, 40 + strlen((const char *) ptr->name));
+ sprintf(*addinfo, "bad root element for torus: %s", ptr->name);
+ xmlFreeDoc(doc);
+ BackendPtr b;
+ return b;
+ }
+ }
+ xmlFreeDoc(doc);
+ }
+
+ if (!sptr)
+ {
+ *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
+ *addinfo = odr_strdup(odr, torus_db.c_str());
+ BackendPtr b;
+ return b;
+ }
+
+ xsltStylesheetPtr xsp = 0;
+ if (sptr->transform_xsl_content.length())
+ {
+ xmlDoc *xsp_doc = xmlParseMemory(sptr->transform_xsl_content.c_str(),
+ sptr->transform_xsl_content.length());
+ if (!xsp_doc)
+ {
+ *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
+ *addinfo = odr_strdup(odr, "zoom: xmlParseMemory failed "
+ "for literalTransform XSL");
+ BackendPtr b;
+ return b;
+ }
+ xsp = xsltParseStylesheetDoc(xsp_doc);
+ if (!xsp)
+ {
+ *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
+ *addinfo =
+ odr_strdup(odr,"zoom: xsltParseStylesheetDoc failed "
+ "for literalTransform XSL");
+ BackendPtr b;
+ xmlFreeDoc(xsp_doc);
+ return b;
+ }
+ }
+ else if (sptr->transform_xsl_fname.length())
+ {
+ const char *path = 0;
+
+ if (m_p->xsldir.length())
+ path = m_p->xsldir.c_str();
+ else
+ path = m_p->file_path.c_str();
+ std::string fname;
+
+ char fullpath[1024];
+ char *cp = yaz_filepath_resolve(sptr->transform_xsl_fname.c_str(),
+ path, 0, fullpath);
+ if (cp)
+ fname.assign(cp);
+ else
+ {
+ *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
+ *addinfo = (char *)
+ odr_malloc(odr, 40 + sptr->transform_xsl_fname.length());
+ sprintf(*addinfo, "zoom: could not open file %s",
+ sptr->transform_xsl_fname.c_str());
+ BackendPtr b;
+ return b;
+ }
+ xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
+ if (!xsp_doc)
+ {
+ *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
+ *addinfo = (char *) odr_malloc(odr, 50 + fname.length());
+ sprintf(*addinfo, "zoom: xmlParseFile failed for file %s",
+ fname.c_str());
+ BackendPtr b;
+ return b;
+ }
+ xsp = xsltParseStylesheetDoc(xsp_doc);
+ if (!xsp)
+ {
+ *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
+ *addinfo = (char *) odr_malloc(odr, 50 + fname.length());
+ sprintf(*addinfo, "zoom: xsltParseStylesheetDoc failed "
+ "for file %s", fname.c_str());
+ BackendPtr b;
+ xmlFreeDoc(xsp_doc);
+ return b;
+ }
+ }
+
+ cql_transform_t cqlt = 0;
+ if (sptr->rpn2cql_fname.length())
+ {
+ char fullpath[1024];
+ char *cp = yaz_filepath_resolve(sptr->rpn2cql_fname.c_str(),
+ m_p->file_path.c_str(), 0, fullpath);
+ if (cp)
+ cqlt = cql_transform_open_fname(fullpath);
+ }
+ else
+ cqlt = cql_transform_create();
+
+ if (!cqlt)
+ {
+ *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
+ *addinfo = odr_strdup(odr, "zoom: missing/invalid cql2rpn file");
+ BackendPtr b;
+ xsltFreeStylesheet(xsp);
+ return b;
+ }
+
+ m_backend.reset();
+
+ BackendPtr b(new Backend);
+
+ b->cqlt = cqlt;
+ b->sptr = sptr;
+ b->xsp = xsp;
+ b->m_frontend_database = database;
+ b->enable_cproxy = param_nocproxy ? false : true;
+
+ if (sptr->query_encoding.length())
+ b->set_option("rpnCharset", sptr->query_encoding);
+
+ std::string extraArgs = sptr->extraArgs;
+
+ b->set_option("timeout", m_p->zoom_timeout.c_str());
+
+ if (m_p->apdu_log)
+ b->set_option("apdulog", "1");
+
+ if (sptr->piggyback && sptr->sru.length())
+ b->set_option("count", "1"); /* some SRU servers INSIST on getting
+ maximumRecords > 0 */
+ b->set_option("piggyback", sptr->piggyback ? "1" : "0");
+
+ if (authentication.length() == 0)
+ authentication = sptr->authentication;
+
+ if (proxy.length() == 0)
+ proxy = sptr->cfProxy;
+ b->m_proxy = proxy;
+
+ if (sptr->cfAuth.length())
+ {
+ // A CF target
+ b->set_option("user", sptr->cfAuth);
+ if (authentication.length())
+ {
+ size_t found = authentication.find('/');
+ if (found != std::string::npos)
+ {
+ out_names[no_out_args] = "user";
+ out_values[no_out_args++] =
+ odr_strdup(odr, authentication.substr(0, found).c_str());
+
+ out_names[no_out_args] = "password";
+ out_values[no_out_args++] =
+ odr_strdup(odr, authentication.substr(found+1).c_str());
+ }
+ else
+ {
+ out_names[no_out_args] = "user";
+ out_values[no_out_args++] =
+ odr_strdup(odr, authentication.c_str());
+ }
+ }
+ if (proxy.length())
+ {
+ out_names[no_out_args] = "proxy";
+ out_values[no_out_args++] = odr_strdup(odr, proxy.c_str());
+ }
+ if (sptr->cfSubDB.length())
+ {
+ out_names[no_out_args] = "subdatabase";
+ out_values[no_out_args++] = odr_strdup(odr, sptr->cfSubDB.c_str());
+ }
+ if (param_nocproxy)
+ {
+ out_names[no_out_args] = "nocproxy";
+ out_values[no_out_args++] = odr_strdup(odr, param_nocproxy);
+ }
+ }
+ else
+ {
+ if (sptr->sru.length() == 0)
+ b->set_option("user", authentication); /* Z39.50 */
+ else
+ {
+ std::string user;
+ std::string password;
+ std::string authtype = sptr->authenticationMode;
+
+ {
+ const char *cstr = authentication.c_str();
+ const char *cp1 = strchr(cstr, '/');
+ if (cp1)
+ {
+ password.assign(cp1 + 1);
+ user.assign(cstr, cp1 - cstr);
+ }
+ else
+ user.assign(cstr);
+ }
+
+ if (authtype.compare("url") == 0)
+ {
+ /* SRU URL encoding of auth stuff */
+ ODR o = odr_createmem(ODR_ENCODE);
+ char *path = 0;
+ const char *names[3];
+ const char *values[3];
+
+ names[0] = "x-username";
+ values[0] = user.c_str();
+ names[1] = "x-password";
+ values[1] = password.c_str();
+ names[2] = 0;
+ values[2] = 0;
+
+ yaz_array_to_uri(&path, o, (char **) names, (char **) values);
+ if (extraArgs.length())
+ extraArgs.append("&");
+ extraArgs.append(path);
+ odr_destroy(o);
+ }
+ else
+ {
+ b->set_option("user", user);
+ if (password.length())
+ b->set_option("password", password);
+ }
+ }
+ if (proxy.length())
+ b->set_option("proxy", proxy);
+ }
+ if (extraArgs.length())
+ b->set_option("extraArgs", extraArgs);
+
+ std::string url(sptr->target);
+ if (sptr->sru.length())
+ {
+ b->set_option("sru", sptr->sru);
+ if (url.find("://") == std::string::npos)
+ url = "http://" + url;
+ if (sptr->sru_version.length())
+ b->set_option("sru_version", sptr->sru_version);
+ }
+ if (no_out_args)
+ {
+ char *x_args = 0;
+ out_names[no_out_args] = 0; // terminate list
+
+ yaz_array_to_uri(&x_args, odr, (char **) out_names,
+ (char **) out_values);
+ url += "," + std::string(x_args);
+ }
+ package.log("zoom", YLOG_LOG, "url: %s", url.c_str());
+ b->connect(url, error, addinfo, odr);
+ if (*error == 0 && b->enable_cproxy)
+ create_content_session(package, b, error, addinfo, odr,
+ content_authentication.length() ?
+ content_authentication : authentication,
+ content_proxy.length() ? content_proxy : proxy,
+ realm);
+ if (*error == 0)
+ m_backend = b;
+ return b;
+}
+
+void yf::Zoom::Frontend::prepare_elements(BackendPtr b,
+ Odr_oid *preferredRecordSyntax,
+ const char *element_set_name,
+ bool &enable_pz2_retrieval,
+ bool &enable_pz2_transform,
+ bool &enable_record_transform,
+ bool &assume_marc8_charset)
+{
+ char oid_name_str[OID_STR_MAX];
+ const char *syntax_name = 0;
+
+ if (preferredRecordSyntax &&
+ !oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml))
+ {
+ if (element_set_name &&
+ !strcmp(element_set_name, m_p->element_transform.c_str()))
+ {
+ enable_pz2_retrieval = true;
+ enable_pz2_transform = true;
+ }
+ else if (element_set_name &&
+ !strcmp(element_set_name, m_p->element_raw.c_str()))
+ {
+ enable_pz2_retrieval = true;
+ }
+ else if (m_p->record_xsp)
+ {
+ enable_pz2_retrieval = true;
+ enable_pz2_transform = true;
+ enable_record_transform = true;
+ }
+ }
+
+ if (enable_pz2_retrieval)
+ {
+ std::string configured_request_syntax = b->sptr->request_syntax;
+ if (configured_request_syntax.length())
+ {
+ syntax_name = configured_request_syntax.c_str();
+ const Odr_oid *syntax_oid =
+ yaz_string_to_oid(yaz_oid_std(), CLASS_RECSYN, syntax_name);
+ if (!oid_oidcmp(syntax_oid, yaz_oid_recsyn_usmarc)
+ || !oid_oidcmp(syntax_oid, yaz_oid_recsyn_opac))
+ assume_marc8_charset = true;
+ }
+ }
+ else if (preferredRecordSyntax)
+ syntax_name =
+ yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
+
+ if (b->sptr->sru.length())
+ syntax_name = "XML";
+
+ b->set_option("preferredRecordSyntax", syntax_name);
+
+ if (enable_pz2_retrieval)
+ {
+ if (element_set_name && !strcmp(element_set_name,
+ m_p->element_passthru.c_str()))
+ ;
+ else
+ {
+ element_set_name = 0;
+ if (b->sptr->element_set.length())
+ element_set_name = b->sptr->element_set.c_str();
+ }
+ }
+
+ b->set_option("elementSetName", element_set_name);
+ if (b->sptr->sru.length() && element_set_name)
+ b->set_option("schema", element_set_name);
+}
+
+Z_Records *yf::Zoom::Frontend::get_explain_records(
+ mp::Package &package,
+ Odr_int start,
+ Odr_int number_to_present,
+ int *error,
+ char **addinfo,
+ Odr_int *number_of_records_returned,
+ ODR odr,
+ BackendPtr b,
+ Odr_oid *preferredRecordSyntax,
+ const char *element_set_name)
+{
+ Odr_int i;
+ Z_Records *records = 0;
+
+ if (!b->explain_doc)
+ {
+ return records;
+ }
+ if (number_to_present > 10000)
+ number_to_present = 10000;
+
+ xmlNode *ptr = xmlDocGetRootElement(b->explain_doc);
+
+ Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
+ odr_malloc(odr, sizeof(*npl));
+ npl->records = (Z_NamePlusRecord **)
+ odr_malloc(odr, number_to_present * sizeof(*npl->records));
+
+ for (i = 0; i < number_to_present; i++)
+ {
+ int num = 0;
+ xmlNode *res = xml_node_search(ptr, &num, start + i + 1);
+ if (!res)
+ break;
+ xmlBufferPtr xml_buf = xmlBufferCreate();
+ xmlNode *tmp_node = xmlCopyNode(res->children, 1);
+ xmlNodeDump(xml_buf, tmp_node->doc, tmp_node, 0, 0);
+
+ Z_NamePlusRecord *npr =
+ (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
+ npr->databaseName = odr_strdup(odr, b->m_frontend_database.c_str());
+ npr->which = Z_NamePlusRecord_databaseRecord;
+ npr->u.databaseRecord =
+ z_ext_record_xml(odr,
+ (const char *) xml_buf->content, xml_buf->use);
+ npl->records[i] = npr;
+ xmlFreeNode(tmp_node);
+ xmlBufferFree(xml_buf);
+ }
+ records = (Z_Records*) odr_malloc(odr, sizeof(*records));
+ records->which = Z_Records_DBOSD;
+ records->u.databaseOrSurDiagnostics = npl;
+
+ npl->num_records = i;
+ *number_of_records_returned = i;
+ return records;
+}
+
+
+Z_Records *yf::Zoom::Frontend::get_records(mp::Package &package,
+ Odr_int start,
+ Odr_int number_to_present,
+ int *error,
+ char **addinfo,
+ Odr_int *number_of_records_returned,
+ ODR odr,
+ BackendPtr b,
+ Odr_oid *preferredRecordSyntax,
+ const char *element_set_name)
+{
+ *number_of_records_returned = 0;
+ Z_Records *records = 0;
+ bool enable_pz2_retrieval = false; // whether target profile is used
+ bool enable_pz2_transform = false; // whether XSLT is used as well
+ bool assume_marc8_charset = false;
+ bool enable_record_transform = false;
+
+ prepare_elements(b, preferredRecordSyntax,
+ element_set_name,
+ enable_pz2_retrieval,
+ enable_pz2_transform,
+ enable_record_transform,
+ assume_marc8_charset);
+
+ package.log("zoom", YLOG_LOG, "pz2_retrieval: %s . pz2_transform: %s",
+ enable_pz2_retrieval ? "yes" : "no",
+ enable_pz2_transform ? "yes" : "no");
+
+ if (start < 0 || number_to_present <=0)
+ return records;
+
+ if (number_to_present > 10000)
+ number_to_present = 10000;
+
+ ZOOM_record *recs = (ZOOM_record *)
+ odr_malloc(odr, (size_t) number_to_present * sizeof(*recs));
+
+ b->present(start, number_to_present, recs, error, addinfo, odr);
+
+ int i = 0;
+ if (!*error)
+ {
+ for (i = 0; i < number_to_present; i++)
+ if (!recs[i])
+ break;
+ }
+ if (i > 0)
+ { // only return records if no error and at least one record
+
+ const char *xsl_parms[3];
+ mp::wrbuf cproxy_host;
+
+ if (b->enable_cproxy && b->cproxy_host.length())
+ {
+ wrbuf_puts(cproxy_host, "\"");
+ wrbuf_puts(cproxy_host, b->cproxy_host.c_str());
+ wrbuf_puts(cproxy_host, "/\"");
+
+ xsl_parms[0] = "cproxyhost";
+ xsl_parms[1] = wrbuf_cstr(cproxy_host);
+ xsl_parms[2] = 0;
+ }
+ else
+ {
+ xsl_parms[0] = 0;
+ }