[8158] | 1 | package org.greenstone.gsdl3.service;
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| 2 |
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| 3 | // Greenstone classes
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| 4 | import org.greenstone.gsdl3.util.*;
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| 5 |
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| 6 | // XML classes
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| 7 | import org.w3c.dom.Element;
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| 8 | import org.w3c.dom.Document;
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| 9 | import org.w3c.dom.NodeList;
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| 10 |
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| 11 | import java.util.HashMap;
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| 12 | import java.io.File;
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| 13 | import java.io.InputStream;
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| 14 | import java.io.BufferedReader;
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| 15 | import java.io.InputStreamReader;
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| 16 | import java.io.IOException;
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| 17 | import java.net.HttpURLConnection;
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| 18 | import java.net.URLConnection;
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| 19 | import java.net.URL;
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| 20 | import java.net.Authenticator;
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| 21 | import java.net.MalformedURLException;
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| 22 |
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[13124] | 23 | import org.apache.log4j.*;
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| 24 |
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[8158] | 25 | /**
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| 26 | *
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| 27 | * @author <a href="mailto:[email protected]">Katherine Don</a>
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| 28 | * @version $Revision: 14224 $
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| 29 | */
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| 30 |
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| 31 | public class IViaProxy
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| 32 | extends ServiceRack {
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[13124] | 33 |
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[13270] | 34 | static Logger logger = Logger.getLogger(org.greenstone.gsdl3.service.IViaProxy.class.getName());
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[8158] | 35 |
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| 36 | // the services on offer
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| 37 | // these strings must match what is found in the properties file
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| 38 | protected static final String TEXT_QUERY_SERVICE = "TextQuery";
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| 39 | protected static final String DOC_CONTENT_SERVICE = "DocumentContentRetrieve";
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| 40 | protected static final String DOC_META_SERVICE = "DocumentMetadataRetrieve";
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| 41 | protected static final String QUERY_PARAM = "query";
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| 42 | protected static final String FIELD_PARAM = "fields";
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| 43 | // have standard gs param names for hits per page, and start page
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| 44 | // these need to be mapped to iVia params
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| 45 | protected static final String GS_HITS_PARAM = "hitsPerPage";
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| 46 | protected static final String IM_HITS_PARAM = "no_of_records_per_page";
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| 47 | protected static final String GS_START_PAGE_PARAM = "startPage";
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| 48 | protected static final String IM_START_PAGE_PARAM = "start_page_no";
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| 49 |
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| 50 | protected String ivia_server_url = null;
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| 51 |
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| 52 | public boolean configure(Element info, Element extra_info) {
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| 53 |
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[10093] | 54 | if (!super.configure(info, extra_info)){
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| 55 | return false;
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| 56 | }
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| 57 |
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[8158] | 58 | Element server_elem = (Element)GSXML.getChildByTagName(info, "iViaServer");
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| 59 | if (server_elem == null) {
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[13124] | 60 | logger.error("no iViaServer element found");
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[8158] | 61 | return false;
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| 62 | }
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| 63 | ivia_server_url = server_elem.getAttribute("url");
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| 64 | if (ivia_server_url.equals("")) {
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[13124] | 65 | logger.error("no url for the iViaServer element");
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[8158] | 66 | return false;
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| 67 | }
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| 68 | Element tq_service = this.doc.createElement(GSXML.SERVICE_ELEM);
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| 69 | tq_service.setAttribute(GSXML.TYPE_ATT, GSXML.SERVICE_TYPE_QUERY);
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| 70 | tq_service.setAttribute(GSXML.NAME_ATT, TEXT_QUERY_SERVICE);
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| 71 | this.short_service_info.appendChild(tq_service);
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| 72 |
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| 73 | Element dc_service = this.doc.createElement(GSXML.SERVICE_ELEM);
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| 74 | dc_service.setAttribute(GSXML.TYPE_ATT, GSXML.SERVICE_TYPE_RETRIEVE);
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| 75 | dc_service.setAttribute(GSXML.NAME_ATT, DOC_CONTENT_SERVICE);
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| 76 | this.short_service_info.appendChild(dc_service);
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| 77 |
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| 78 | Element dm_service = this.doc.createElement(GSXML.SERVICE_ELEM);
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| 79 | dm_service.setAttribute(GSXML.TYPE_ATT, GSXML.SERVICE_TYPE_RETRIEVE);
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| 80 | dm_service.setAttribute(GSXML.NAME_ATT, DOC_META_SERVICE);
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| 81 | this.short_service_info.appendChild(dm_service);
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| 82 |
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| 83 | //
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| 84 | // add some format info to service map if there is any
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| 85 | String path = GSPath.appendLink(GSXML.SEARCH_ELEM, GSXML.FORMAT_ELEM);
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| 86 | Element format = (Element) GSXML.getNodeByPath(extra_info, path);
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| 87 | if (format != null) {
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| 88 | this.format_info_map.put(TEXT_QUERY_SERVICE, this.doc.importNode(format, true));
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| 89 | }
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| 90 |
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| 91 |
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| 92 | // look for document display format
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| 93 | path = GSPath.appendLink(GSXML.DISPLAY_ELEM, GSXML.FORMAT_ELEM);
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| 94 | Element display_format = (Element)GSXML.getNodeByPath(extra_info, path);
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| 95 | if (display_format != null) {
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| 96 | this.format_info_map.put(DOC_CONTENT_SERVICE, this.doc.importNode(display_format, true));
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| 97 | // shoudl we make a copy?
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| 98 | }
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| 99 |
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| 100 | return true;
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| 101 |
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| 102 | }
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| 103 |
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| 104 | protected Element getServiceDescription(String service, String lang, String subset) {
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| 105 |
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| 106 | if (service.equals(TEXT_QUERY_SERVICE)) {
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| 107 | Element tq_service = this.doc.createElement(GSXML.SERVICE_ELEM);
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| 108 | tq_service.setAttribute(GSXML.TYPE_ATT, GSXML.SERVICE_TYPE_QUERY);
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| 109 | tq_service.setAttribute(GSXML.NAME_ATT, TEXT_QUERY_SERVICE);
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| 110 | if (subset == null || subset.equals(GSXML.DISPLAY_TEXT_ELEM + GSXML.LIST_MODIFIER)) {
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| 111 | tq_service.appendChild(GSXML.createDisplayTextElement(this.doc, GSXML.DISPLAY_TEXT_NAME, getTextString(TEXT_QUERY_SERVICE+".name", lang)));
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| 112 | tq_service.appendChild(GSXML.createDisplayTextElement(this.doc, GSXML.DISPLAY_TEXT_SUBMIT, getTextString(TEXT_QUERY_SERVICE+".submit", lang)));
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| 113 | tq_service.appendChild(GSXML.createDisplayTextElement(this.doc, GSXML.DISPLAY_TEXT_DESCRIPTION, getTextString(TEXT_QUERY_SERVICE+".description", lang)));
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| 114 | }
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| 115 | if (subset == null || subset.equals(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER)) {
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| 116 | Element param_list = this.doc.createElement(GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER);
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| 117 | tq_service.appendChild(param_list);
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| 118 | Element param = GSXML.createParameterDescription(this.doc, QUERY_PARAM, getTextString("param."+QUERY_PARAM, lang), GSXML.PARAM_TYPE_STRING, null, null, null);
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| 119 | param_list.appendChild(param);
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| 120 | String [] field_ids = {"kw", "au", "su", "ti", "de", "fu"};
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| 121 | String [] field_names = {
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| 122 | getTextString("param."+FIELD_PARAM+".kw", lang),
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| 123 | getTextString("param."+FIELD_PARAM+".au", lang),
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| 124 | getTextString("param."+FIELD_PARAM+".su", lang),
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| 125 | getTextString("param."+FIELD_PARAM+".ti", lang),
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| 126 | getTextString("param."+FIELD_PARAM+".de", lang),
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| 127 | getTextString("param."+FIELD_PARAM+".fu", lang) };
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| 128 |
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| 129 | param = GSXML.createParameterDescription(this.doc, FIELD_PARAM, getTextString("param."+FIELD_PARAM, lang), GSXML.PARAM_TYPE_ENUM_MULTI, "kw,au,su,ti,de,fu", field_ids, field_names);
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| 130 | param_list.appendChild(param);
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| 131 |
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| 132 |
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| 133 | String [] hits_options = {"10", "30", "50"};
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| 134 | param = GSXML.createParameterDescription(this.doc, GS_HITS_PARAM, getTextString("param."+GS_HITS_PARAM, lang), GSXML.PARAM_TYPE_ENUM_SINGLE, "10", hits_options, hits_options);
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| 135 | param_list.appendChild(param);
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| 136 |
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| 137 | param = GSXML.createParameterDescription(this.doc, GS_START_PAGE_PARAM, "", GSXML.PARAM_TYPE_INVISIBLE, "1", null, null);
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| 138 | param_list.appendChild(param);
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| 139 | }
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| 140 | return tq_service;
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| 141 | }
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| 142 | if (service.equals(DOC_META_SERVICE)) {
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| 143 | Element dm_service = this.doc.createElement(GSXML.SERVICE_ELEM);
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| 144 | dm_service.setAttribute(GSXML.TYPE_ATT, GSXML.SERVICE_TYPE_RETRIEVE);
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| 145 | dm_service.setAttribute(GSXML.NAME_ATT, DOC_META_SERVICE);
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| 146 | return dm_service;
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| 147 |
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| 148 | }
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| 149 | if (service.equals(DOC_CONTENT_SERVICE)) {
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| 150 | Element dc_service = this.doc.createElement(GSXML.SERVICE_ELEM);
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| 151 | dc_service.setAttribute(GSXML.TYPE_ATT, GSXML.SERVICE_TYPE_RETRIEVE);
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| 152 | dc_service.setAttribute(GSXML.NAME_ATT, DOC_CONTENT_SERVICE);
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| 153 | return dc_service;
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| 154 |
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| 155 |
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| 156 | }
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| 157 | return null;
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| 158 | }
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| 159 |
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| 160 | /** Process a text query - implemented by concrete subclasses */
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| 161 | protected Element processTextQuery(Element request) {
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| 162 |
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| 163 | // Create a new (empty) result message
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| 164 | Element result = this.doc.createElement(GSXML.RESPONSE_ELEM);
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| 165 | result.setAttribute(GSXML.FROM_ATT, TEXT_QUERY_SERVICE);
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| 166 | result.setAttribute(GSXML.TYPE_ATT, GSXML.REQUEST_TYPE_PROCESS);
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| 167 | Element doc_node_list = this.doc.createElement(GSXML.DOC_NODE_ELEM+GSXML.LIST_MODIFIER);
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| 168 | result.appendChild(doc_node_list);
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| 169 |
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| 170 |
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| 171 | Element param_list = (Element) GSXML.getChildByTagName(request, GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER);
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| 172 | if (param_list == null) {
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[13124] | 173 | logger.error("TextQuery request had no paramList.");
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[8158] | 174 | return result; // Return the empty result
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| 175 | }
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| 176 |
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| 177 | // Process the request parameters
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| 178 | HashMap params = GSXML.extractParams(param_list, false);
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| 179 |
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| 180 | // Make sure a query has been specified
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| 181 | String query = (String) params.get(QUERY_PARAM);
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| 182 | if (query == null || query.equals("")) {
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| 183 | return result; // Return the empty result
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| 184 | }
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| 185 | // tidy whitespace
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| 186 | query = query.replaceAll("\\s+", "+");
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| 187 | String url_string = ivia_server_url+"/cgi-bin/canned_search?theme=gsdl3&query="+query;
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| 188 |
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| 189 | // check for fields
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| 190 | String fields = (String) params.get(FIELD_PARAM);
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| 191 | if (fields != null && !fields.equals("")) {
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| 192 | url_string += "&fields="+fields;
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| 193 | }
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| 194 |
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| 195 | //check for hits per page
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| 196 | String hits_per_page = (String) params.get(GS_HITS_PARAM);
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| 197 | if (hits_per_page != null && !hits_per_page.equals("")) {
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| 198 | url_string += "&"+IM_HITS_PARAM+"="+hits_per_page;
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| 199 | }
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| 200 |
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| 201 | // check for start page
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| 202 | String start_page = (String) params.get(GS_START_PAGE_PARAM);
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| 203 | if (start_page != null && !start_page.equals("")) {
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| 204 | url_string += "&"+IM_START_PAGE_PARAM+"="+start_page;
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| 205 | }
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| 206 | String results_num = null;
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| 207 | String doc_ids = null;
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| 208 | try {
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[13124] | 209 | logger.debug("IViaProxy, sending "+url_string);
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[8158] | 210 | BufferedReader reader = makeConnection(url_string);
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| 211 | results_num = reader.readLine();
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| 212 | doc_ids = reader.readLine();
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| 213 |
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| 214 | } catch (Exception e) {
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[13124] | 215 | logger.error("exception happened during query");
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[8158] | 216 | e.printStackTrace();
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| 217 | return result;
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| 218 | }
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| 219 |
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| 220 | if (results_num.startsWith("Resources: ")) {
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| 221 | results_num = results_num.substring(11);
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| 222 | } else {
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[13124] | 223 | logger.error("badly formatted results line: "+results_num);
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[8158] | 224 | return result;
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| 225 | }
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| 226 | if (doc_ids.startsWith("Ids: ")) {
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| 227 | doc_ids = doc_ids.substring(5).trim();
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| 228 | } else {
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[13124] | 229 | logger.error("badly formatted docs line: "+doc_ids);
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[8158] | 230 | return result;
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| 231 | }
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| 232 |
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| 233 | // get the num docs and add to a metadata list
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| 234 | Element metadata_list = this.doc.createElement(GSXML.METADATA_ELEM+GSXML.LIST_MODIFIER);
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| 235 | result.appendChild(metadata_list);
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| 236 |
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| 237 | // Add a metadata element specifying the number of matching documents
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| 238 | long numdocs = Long.parseLong(results_num);
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| 239 | GSXML.addMetadata(this.doc, metadata_list, "numDocsMatched", ""+numdocs);
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| 240 | String [] ids = doc_ids.split(" ");
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| 241 |
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| 242 | for (int d=0; d<ids.length; d++) {
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| 243 | Element doc_node = this.doc.createElement(GSXML.DOC_NODE_ELEM);
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| 244 | doc_node.setAttribute(GSXML.NODE_ID_ATT, ids[d]);
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| 245 | doc_node_list.appendChild(doc_node);
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| 246 | }
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[13124] | 247 | logger.debug("IViaProxy result:");
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| 248 | logger.debug(this.converter.getString(result));
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[8158] | 249 | return result;
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| 250 |
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| 251 | }
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| 252 |
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| 253 | protected Element processDocumentMetadataRetrieve(Element request) {
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| 254 | Element result = this.doc.createElement(GSXML.RESPONSE_ELEM);
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| 255 | result.setAttribute(GSXML.FROM_ATT, DOC_META_SERVICE);
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| 256 | result.setAttribute(GSXML.TYPE_ATT, GSXML.REQUEST_TYPE_PROCESS);
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| 257 |
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| 258 | // Get the parameters of the request
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| 259 | Element param_list = (Element) GSXML.getChildByTagName(request, GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER);
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| 260 | if (param_list == null) {
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[13124] | 261 | logger.error("missing paramList.\n");
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[8158] | 262 | return result; // Return the empty result
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| 263 | }
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| 264 |
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| 265 | // The metadata information required
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| 266 | StringBuffer field_list = new StringBuffer();
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[14224] | 267 | Element param = GSXML.getFirstElementChild(param_list);//(Element) param_list.getFirstChild();
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[8158] | 268 | while (param != null) {
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| 269 | // Identify the metadata information desired
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| 270 | if (param.getAttribute(GSXML.NAME_ATT).equals("metadata")) {
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| 271 | String metadata = GSXML.getValue(param);
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| 272 | if (isAcceptableMetadata(metadata)) {
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| 273 | field_list.append(metadata);
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| 274 | field_list.append(",");
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| 275 | }
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| 276 | }
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| 277 | param = (Element) param.getNextSibling();
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| 278 | }
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| 279 |
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| 280 | if (field_list.length()==0) {
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[13124] | 281 | logger.error("no metadata specified.\n");
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[8158] | 282 | return result;
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| 283 | }
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| 284 |
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| 285 | // Get the documents
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| 286 | Element request_node_list = (Element) GSXML.getChildByTagName(request, GSXML.DOC_NODE_ELEM+GSXML.LIST_MODIFIER);
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| 287 | if (request_node_list == null) {
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[13124] | 288 | logger.error("DocumentMetadataRetrieve request had no "+GSXML.DOC_NODE_ELEM+"List.\n");
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[8158] | 289 | return result;
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| 290 | }
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| 291 |
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| 292 | StringBuffer record_id_list = new StringBuffer();
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| 293 |
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| 294 | NodeList request_nodes = request_node_list.getChildNodes();
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| 295 | for (int i = 0; i < request_nodes.getLength(); i++) {
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| 296 | Element request_node = (Element) request_nodes.item(i);
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| 297 | String node_id = request_node.getAttribute(GSXML.NODE_ID_ATT);
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| 298 | record_id_list.append(node_id);
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| 299 | record_id_list.append(",");
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| 300 | }
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| 301 |
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| 302 | // do the query to the iVia server
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| 303 | String url_string = ivia_server_url+"/cgi-bin/view_record_set?theme=gsdl3&record_id_list="+record_id_list.toString()+"&field_list="+field_list.toString();
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| 304 |
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| 305 | Element node_list = this.doc.createElement(GSXML.DOC_NODE_ELEM+GSXML.LIST_MODIFIER);
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| 306 | result.appendChild(node_list);
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| 307 | try {
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| 308 | BufferedReader reader = makeConnection(url_string);
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| 309 | String line;
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| 310 | while ((line = reader.readLine()) != null) {
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| 311 | if (!line.startsWith("Record:")) {
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| 312 | continue;
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| 313 | }
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| 314 | // the first line is the record
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| 315 | line=line.substring(8);
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| 316 | Element doc_node = this.doc.createElement(GSXML.DOC_NODE_ELEM);
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| 317 | doc_node.setAttribute(GSXML.NODE_ID_ATT, line);
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| 318 | Element meta_list = this.doc.createElement(GSXML.METADATA_ELEM+GSXML.LIST_MODIFIER);
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| 319 | doc_node.appendChild(meta_list);
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| 320 | while ((line = reader.readLine()) != null) {
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| 321 | //metadata entry
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| 322 | int col_pos = line.indexOf(':');
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| 323 | if (col_pos == -1) {
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| 324 | // end of the metadata for this doc
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| 325 | break;
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| 326 | }
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| 327 | String name = line.substring(0,col_pos);
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| 328 | String value = line.substring(col_pos+2); // includes a space
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| 329 | GSXML.addMetadata(this.doc, meta_list, name, value);
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| 330 | }
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| 331 | node_list.appendChild(doc_node);
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| 332 |
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| 333 | }
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| 334 | } catch (Exception e) {
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[13124] | 335 | logger.error("exception happened");
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[8158] | 336 | e.printStackTrace();
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| 337 | }
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[13124] | 338 | logger.debug("IViaProxy: returning result: ");
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| 339 | logger.debug(this.converter.getPrettyString(result));
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[8158] | 340 | return result;
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| 341 |
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| 342 | }
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| 343 |
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| 344 | protected Element processDocumentContentRetrieve(Element request) {
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| 345 | Element result = this.doc.createElement(GSXML.RESPONSE_ELEM);
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| 346 | result.setAttribute(GSXML.FROM_ATT, DOC_CONTENT_SERVICE);
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| 347 | result.setAttribute(GSXML.TYPE_ATT, GSXML.REQUEST_TYPE_PROCESS);
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| 348 |
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| 349 | // Get the request doc_list
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| 350 | Element query_doc_list = (Element) GSXML.getChildByTagName(request, GSXML.DOC_NODE_ELEM+GSXML.LIST_MODIFIER);
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| 351 | if (query_doc_list == null) {
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[13124] | 352 | logger.error("DocumentContentRetrieve request specified no doc nodes.\n");
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[8158] | 353 | return result;
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| 354 | }
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| 355 |
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| 356 | Element doc_list = this.doc.createElement(GSXML.DOC_NODE_ELEM+GSXML.LIST_MODIFIER);
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| 357 | result.appendChild(doc_list);
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| 358 |
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| 359 | // Get the documents
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| 360 | String[] doc_ids = GSXML.getAttributeValuesFromList(query_doc_list,
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| 361 | GSXML.NODE_ID_ATT);
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| 362 | for (int i = 0; i < doc_ids.length; i++) {
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| 363 | String doc_id = doc_ids[i];
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| 364 | Element doc_node = getDocument(doc_id);
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| 365 | doc_list.appendChild(doc_node);
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| 366 | }
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| 367 | return result;
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| 368 |
|
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| 369 | }
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| 370 |
|
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| 371 |
|
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| 372 | /** gets a document by sending a request to iVia, then processes it and creates a documentNode around the text */
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| 373 | protected Element getDocument(String doc_id) {
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| 374 |
|
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| 375 | String url_string = ivia_server_url+"/cgi-bin/view_record?theme=gsdl3&record_id="+doc_id;
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| 376 | StringBuffer buffer = new StringBuffer();
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| 377 | try {
|
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| 378 | BufferedReader reader = makeConnection(url_string);
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| 379 |
|
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| 380 | String line;
|
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| 381 | while((line = reader.readLine())!= null) {
|
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| 382 | buffer.append(line);
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| 383 | }
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| 384 |
|
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| 385 |
|
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| 386 | } catch (Exception e) {
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[13124] | 387 | logger.error("exception happened");
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[8158] | 388 | e.printStackTrace();
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| 389 | }
|
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| 390 |
|
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| 391 | String node_content = buffer.toString();
|
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| 392 | String escaped_content = GSXML.xmlSafe(node_content);
|
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| 393 |
|
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| 394 | StringBuffer processed_content = new StringBuffer(escaped_content.length());
|
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| 395 | processed_content.append("<nodeContent>");
|
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| 396 | int pos = 0;
|
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| 397 | int lastpos = 0;
|
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| 398 | while ((pos = escaped_content.indexOf("<a ", lastpos))!= -1) {
|
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| 399 | processed_content.append(escaped_content.substring(lastpos, pos));
|
---|
| 400 | int endpos = escaped_content.indexOf("</a>", pos);
|
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| 401 | if (endpos == -1) {
|
---|
| 402 | break;
|
---|
| 403 | }
|
---|
| 404 | String link = escaped_content.substring(pos, endpos+10);
|
---|
| 405 | link = convertLink(link);
|
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| 406 | processed_content.append(link);
|
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| 407 | lastpos = endpos+10;
|
---|
| 408 | }
|
---|
| 409 | processed_content.append(escaped_content.substring(lastpos)); // get the last bit
|
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| 410 | processed_content.append("</nodeContent>");
|
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| 411 |
|
---|
| 412 | Element doc_node = this.doc.createElement(GSXML.DOC_NODE_ELEM);
|
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| 413 | doc_node.setAttribute(GSXML.NODE_ID_ATT, doc_id);
|
---|
| 414 |
|
---|
[9874] | 415 | Document content_doc = this.converter.getDOM(processed_content.toString());
|
---|
| 416 | if (content_doc != null) {
|
---|
| 417 | Element content_element = content_doc.getDocumentElement();
|
---|
| 418 | doc_node.appendChild(this.doc.importNode(content_element, true));
|
---|
| 419 | } else {
|
---|
[13124] | 420 | logger.error("Couldn't parse the node content");
|
---|
[9874] | 421 | }
|
---|
[8158] | 422 | return doc_node;
|
---|
| 423 |
|
---|
| 424 | }
|
---|
| 425 |
|
---|
| 426 | /** converts a url from an <a> element into a greenstone suitable one */
|
---|
| 427 | protected String convertLink(String aref) {
|
---|
| 428 |
|
---|
| 429 | if (aref.indexOf("href="http") != -1) {
|
---|
| 430 | return aref; // an external link
|
---|
| 431 | }
|
---|
| 432 | String type = "other";
|
---|
| 433 | if (aref.indexOf("/cgi-bin/canned_search")!=-1) {
|
---|
| 434 | type="query";
|
---|
| 435 | } else if (aref.indexOf("/cgi-bin/click_through") != -1) {
|
---|
| 436 | type = "external";
|
---|
| 437 | } else if (aref.indexOf("/cgi-bin/view_record") != -1) {
|
---|
| 438 | type="document";
|
---|
| 439 | }
|
---|
| 440 |
|
---|
| 441 | int href_start = aref.indexOf("href="")+11;
|
---|
| 442 | int href_end = aref.indexOf(">", href_start);
|
---|
| 443 | String href = aref.substring(href_start, href_end);
|
---|
| 444 | String link_content = aref.substring(href_end+4, aref.length()-10);
|
---|
| 445 |
|
---|
| 446 | if (type.equals("external")) {
|
---|
| 447 | // the external link is everything after the http at the end.
|
---|
| 448 | String address = href.substring(href.lastIndexOf("http"));
|
---|
| 449 | address = address.replaceAll("%3[aA]", ":");
|
---|
| 450 | address = address.replaceAll("%2[fF]", "/");
|
---|
| 451 |
|
---|
| 452 | return "<a href=\""+address+"\">"+link_content+"</a>";
|
---|
| 453 | }
|
---|
| 454 | if (type.equals("other")) {
|
---|
| 455 | return "other type of link ("+link_content+")";
|
---|
| 456 | }
|
---|
| 457 | StringBuffer result = new StringBuffer();
|
---|
| 458 | result.append("<link type='");
|
---|
| 459 | result.append(type);
|
---|
| 460 | result.append("'");
|
---|
| 461 | if (type.equals("query")) {
|
---|
| 462 | result.append(" service='TextQuery'");
|
---|
| 463 | }
|
---|
| 464 | result.append(">");
|
---|
| 465 | // add in the parameters
|
---|
| 466 | href = href.substring(href.indexOf("?")+1);
|
---|
| 467 | String [] params = href.split("&");
|
---|
| 468 | for (int i=0; i<params.length; i++) {
|
---|
| 469 | String param = params[i];
|
---|
| 470 | int eq_pos = param.indexOf("=");
|
---|
| 471 | if (eq_pos != -1) {
|
---|
| 472 |
|
---|
| 473 | result.append("<param name='"+param.substring(0, eq_pos)+"' value='"+param.substring(eq_pos+1)+"'/>");
|
---|
| 474 | }
|
---|
| 475 | }
|
---|
| 476 | result.append(link_content);
|
---|
| 477 | result.append("</link>");
|
---|
| 478 |
|
---|
| 479 | return result.toString();
|
---|
| 480 |
|
---|
| 481 | }
|
---|
| 482 |
|
---|
| 483 | // iVia craps out if we ask for a metadata which is not valid. So need
|
---|
| 484 | // to make sure we only ask for acceptable fields.
|
---|
| 485 | protected boolean isAcceptableMetadata(String meta) {
|
---|
| 486 | String valid_metadata = ",title,url,ivia_description,keywords,subjects,";
|
---|
| 487 | if (valid_metadata.indexOf(","+meta+",")!=-1) {
|
---|
| 488 | return true;
|
---|
| 489 | }
|
---|
| 490 | return false;
|
---|
| 491 | }
|
---|
| 492 | protected BufferedReader makeConnection(String url_string) {
|
---|
| 493 | BufferedReader reader = null;
|
---|
| 494 | try {
|
---|
| 495 | URL url = new URL(url_string);
|
---|
| 496 | HttpURLConnection connection = (HttpURLConnection)url.openConnection();
|
---|
| 497 | InputStream input = connection.getInputStream();
|
---|
| 498 | reader = new BufferedReader(new InputStreamReader(input));
|
---|
| 499 | } catch (java.net.MalformedURLException e) {
|
---|
| 500 |
|
---|
[13124] | 501 | logger.error("Malformed URL: "+url_string);
|
---|
[8158] | 502 | } catch (java.io.IOException e) {
|
---|
[13124] | 503 | logger.error("An error occurred during IO to url "+url_string);
|
---|
[8158] | 504 | }
|
---|
| 505 | return reader;
|
---|
| 506 | }
|
---|
| 507 |
|
---|
| 508 | }
|
---|