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1 package de.mpiwg.itgroup.escidoc.MPIWGServices.Restlet.services.redirect;
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2
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3
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4 import java.io.BufferedInputStream;
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5 import java.io.BufferedReader;
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6 import java.io.DataInputStream;
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7 import java.io.IOException;
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8 import java.io.InputStream;
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9 import java.io.InputStreamReader;
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10 import java.net.MalformedURLException;
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11 import java.net.URL;
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12 import java.util.ArrayList;
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13 import java.util.HashMap;
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14 import java.util.List;
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15 import java.util.Map;
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16 import java.util.Properties;
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17
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18 import org.apache.http.HttpResponse;
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19 import org.jdom.Attribute;
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20 import org.jdom.Document;
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21 import org.jdom.Element;
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22 import org.jdom.JDOMException;
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23 import org.jdom.input.SAXBuilder;
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24 import org.jdom.xpath.XPath;
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25 import org.restlet.data.Status;
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26 import org.restlet.representation.Representation;
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27 import org.restlet.representation.StringRepresentation;
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28 import org.restlet.resource.Get;
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29 import org.restlet.resource.ServerResource;
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30
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31 import de.mpiwg.itgroup.eSciDoc.Tools.EScidocBasicHandler;
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32 import de.mpiwg.itgroup.eSciDoc.Tools.EScidocTools;
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33 import de.mpiwg.itgroup.eSciDoc.echoObjects.ECHORessource;
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34
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35 //http://127.0.0.1:8280/eScidocMPIWGServicesRestlet/docuview/escidoc:35464:2
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36
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37 public class DocuviewerRedirector extends ServerResource{
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38
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39 private String eScidocServer;
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40 private String eScidocPort;
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41 private String eScidocUser;
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42 private String eScidocUserPW;
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43
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44 private String viewerWithIndexMetaFormatString;//="http://echo.mpiwg-berlin.mpg.de/ECHOdocuViewfull?url=%s"; // Formatstring fuer URLS, die die Daten anzeigen, falls ein IndexMeta vorhanden ist.
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45 private String viewerWithImagePathFormatString;//="http://echo.mpiwg-berlin.mpg.de/ECHOdocuViewfull?mode=imagepath&url=%s&viewMode=images"; // Formatstring fuer URLS, die die Daten anzeigen, falls ein ImagePath vorhanden ist.
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46
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47 private Map<String,List<String>> viewers;
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48
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49 public DocuviewerRedirector() throws IOException{
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50 InputStream is = getClass().getResourceAsStream("/de/mpiwg/itgroup/escidoc/MPIWGServices/Restlet/config/eScidocServer.config");
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51 Properties prop = new Properties();
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52 prop.load(is);
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53
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54 eScidocServer= (String)prop.get("eScidocServer");
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55 eScidocPort=(String)prop.get("eScidocPort");
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56 eScidocUser = (String)prop.get("eScidocUser");
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57 eScidocUserPW=(String)prop.get("eScidocUserPW");
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58
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59 InputStream viewerConf = getClass().getResourceAsStream("/de/mpiwg/itgroup/escidoc/MPIWGServices/Restlet/config/viewer.config");
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60
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61 BufferedReader br = new BufferedReader(new InputStreamReader(new DataInputStream(viewerConf)));
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62
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63 String strLine;
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64 viewers = new HashMap<String, List<String>>();
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65
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66 while ((strLine = br.readLine()) != null) {
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67 String[] splitted = strLine.split(",");
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68
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69 List<String> list =new ArrayList<String>();
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70
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71 if (splitted[1].equals(""))
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72 list.add(null); // index.meta koennen nicht interpretiert werden.
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73 else
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74 list.add(splitted[1]); // add url for index.meta
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75
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76
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77 if (splitted.length>1)
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78 if (splitted[2].equals(""))
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79 list.add(null);
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80 else
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81 list.add(splitted[2]); // add url for images
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82 else
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83 list.add(null); // null wenn keiner konfiguriert wird. TODO: handle this
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84
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85 viewers.put(splitted[0], list);
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86 }
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87
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88
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89 }
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90 @Get("html")
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91 public Representation getHtml()
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92 {
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93 String id = (String)getRequest().getAttributes().get("escidocId");
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94 String flavour = (String)getRequest().getAttributes().get("flavour");
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95
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96 if (!viewers.containsKey(flavour)){
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97 setStatus(Status.CLIENT_ERROR_NOT_FOUND);
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98 return new StringRepresentation("no viewer configured for flavour:"+flavour+"! Check /de/mpiwg/itgroup/escidoc/MPIWGServices/Restlet/config/viewer.config");
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99 }
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100
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101 List<String> formats = viewers.get(flavour);
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102
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103 viewerWithIndexMetaFormatString = formats.get(0);
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104 viewerWithImagePathFormatString = formats.get(1);
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105
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106 EScidocBasicHandler handler = null;
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107 if (getContext().getAttributes().containsKey("escidocHandler")){
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108 handler = (EScidocBasicHandler) getContext().getAttributes().get("escidocHandler");
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109 }
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110
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111 if (handler==null){
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112 handler = new EScidocBasicHandler(eScidocServer, Integer.valueOf(eScidocPort),eScidocUser,eScidocUserPW);
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113 }
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114
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115
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116 HttpResponse resp;
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117 try {
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118 resp = handler.eScidocGet("/ir/item/"+id);
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119 } catch (IOException e) {
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120 setStatus(Status.SERVER_ERROR_INTERNAL);
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121 return new StringRepresentation("<html><body>error1</body></html>");
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122 }
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123 int code = resp.getStatusLine().getStatusCode();
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124 if (code!=200){
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125 setStatus(new Status(code));
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126 return new StringRepresentation("<html><body>error2</body></html>");
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127
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128 }
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129
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130 Document doc;
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131 String url;
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132 try {
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133 doc = new SAXBuilder().build(resp.getEntity().getContent());
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134
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135
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136 //XPath xp= EScidocTools.getESciDocXpath("//escidocComponents:component[escidocComponents:properties/prop:content-category[text()='index_meta']]/escidocComponents:content/@xlink:href");
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137
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138 XPath xp= EScidocTools.getESciDocXpath("//metadataRecords:md-record[@xlink:title='mpiwg-admin']/mpiwg:admin/mpiwg:orig-ref/@xlink:href");
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139 Attribute item = (Attribute)xp.selectSingleNode(doc);
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140 url = item.getValue();
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141
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142 } catch (Exception e) {
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143 setStatus(Status.SERVER_ERROR_INTERNAL);
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144 return new StringRepresentation("<html><body>error3a</body></html>");
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145
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146 }
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147
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148
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149 if (!url.startsWith("http")) { // relative url
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150 url="http://"+eScidocServer+":"+eScidocPort+url;
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151 }
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152
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153
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154
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155 String viewerUrl;
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156 if (checkIndexMeta(url) && (viewerWithIndexMetaFormatString!=null)){ // index meta enthaelt texttool und viewer kann index meta interpretieren.
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157 viewerUrl=String.format(viewerWithIndexMetaFormatString, url);
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158 } else { // andernfalls hole den pfad auf die bilder
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159
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160 try {
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161 XPath xp= EScidocTools.getESciDocXpath("//metadataRecords:md-record[@xlink:title='mpiwg-admin']/mpiwg:admin/mpiwg:imageFolder");
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162 Element item = (Element)xp.selectSingleNode(doc);
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163 String path = item.getTextTrim();
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164 path= ECHORessource.correct(path); // nur pfad nach online
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165 if (path.equals("")){
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166 xp= EScidocTools.getESciDocXpath("//metadataRecords:md-record[@xlink:title='mpiwg-admin']/mpiwg:admin/mpiwg:archivePath");
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167 item = (Element)xp.selectSingleNode(doc);
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168 path = item.getTextTrim();
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169 path= ECHORessource.correct(path); // nur pfad nach online
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170 path=path+"/pageimg";
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171 }
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172 viewerUrl=String.format(viewerWithImagePathFormatString, path);
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173 } catch (Exception e) {
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174 setStatus(Status.SERVER_ERROR_INTERNAL);
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175 return new StringRepresentation("<html><body>error3</body></html>");
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176 }
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177
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178
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179
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180 }
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181 StringRepresentation repr = new StringRepresentation(viewerUrl);
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182 getResponse().redirectPermanent(viewerUrl);
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183 return repr;
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184 }
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185
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186
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187
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188 private boolean checkIndexMeta(String url) {
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189 try {
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190 Document doc = new SAXBuilder().build(new URL(url));
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191 XPath xp = XPath.newInstance("//texttool");
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192
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193 Object item = xp.selectSingleNode(doc);
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194 if (item!=null)
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195 return true;
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196
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197 } catch (MalformedURLException e) {
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198 // TODO Auto-generated catch block
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199 e.printStackTrace();
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200 } catch (JDOMException e) {
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201 // TODO Auto-generated catch block
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202 e.printStackTrace();
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203 } catch (IOException e) {
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204 // TODO Auto-generated catch block
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205 e.printStackTrace();
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206 }
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207
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208 return false;
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209 }
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210
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211
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212
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213 }
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