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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.IOException;
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5 import java.io.InputStream;
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6 import java.util.Properties;
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7
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8 import org.apache.http.HttpResponse;
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9 import org.jdom.Attribute;
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10 import org.jdom.Document;
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11 import org.jdom.JDOMException;
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12 import org.jdom.input.SAXBuilder;
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13 import org.jdom.xpath.XPath;
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14 import org.restlet.data.Status;
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15 import org.restlet.representation.Representation;
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16 import org.restlet.representation.StringRepresentation;
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17 import org.restlet.resource.Get;
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18 import org.restlet.resource.ServerResource;
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19
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20 import de.mpiwg.itgroup.eSciDoc.Tools.EScidocBasicHandler;
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21 import de.mpiwg.itgroup.eSciDoc.Tools.EScidocTools;
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22
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23
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24 public class ComponentURLRedirector extends ServerResource{
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25
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26 private String eScidocServer;
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27 private String eScidocPort;
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28 private String content_cat;
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29 private String eScidocUser;
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30 private String eScidocUserPW;
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31
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32 public ComponentURLRedirector(String content_cat) throws IOException{
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33 this.content_cat = content_cat;
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34 InputStream is = getClass().getResourceAsStream("/de/mpiwg/itgroup/escidoc/MPIWGServices/Restlet/config/eScidocServer.config");
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35 Properties prop = new Properties();
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36 prop.load(is);
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37
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38 eScidocServer= (String)prop.get("eScidocServer");
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39 eScidocPort=(String)prop.get("eScidocPort");
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40 eScidocUser = (String)prop.get("eScidocUser");
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41 eScidocUserPW=(String)prop.get("eScidocUserPW");
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42
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43 }
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44 @Get("html")
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45 public Representation getHtml()
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46 {
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47 String id = (String)getRequest().getAttributes().get("escidocId");
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48 EScidocBasicHandler handler = null;
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49 if (getContext().getAttributes().containsKey("escidocHandler")){
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50 handler = (EScidocBasicHandler) getContext().getAttributes().get("escidocHandler");
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51 }
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52
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53 if (handler==null){
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54 handler = new EScidocBasicHandler(eScidocServer, Integer.valueOf(eScidocPort),eScidocUser,eScidocUserPW);
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55 }
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56
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57
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58 HttpResponse resp;
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59 try {
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60 resp = handler.eScidocGet("/ir/item/"+id);
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61 } catch (IOException e) {
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62 setStatus(Status.SERVER_ERROR_INTERNAL);
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63 return new StringRepresentation("<html><body>error1</body></html>");
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64 }
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65 int code = resp.getStatusLine().getStatusCode();
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66 if (code!=200){
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67 setStatus(new Status(code));
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68 return new StringRepresentation("<html><body>error2</body></html>");
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69
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70 }
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71
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72 Document doc;
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73 String url;
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74 try {
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75 doc = new SAXBuilder().build(resp.getEntity().getContent());
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76
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77
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78 XPath xp= EScidocTools.getESciDocXpath("//escidocComponents:component[escidocComponents:properties/prop:content-category[text()='"+content_cat+"']]/escidocComponents:content/@xlink:href");
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79 Attribute item = (Attribute)xp.selectSingleNode(doc);
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80 url = item.getValue();
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81
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82 } catch (Exception e) {
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83
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84 if (content_cat.equals("display_url")) // wenn display und error dann versuche genrische anzeige der bilder
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85 {
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86 url="./images";
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87 StringRepresentation repr = new StringRepresentation(url);
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88 getResponse().redirectPermanent(url);
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89 return repr;
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90
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91 } else {
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92 setStatus(Status.SERVER_ERROR_INTERNAL);
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93
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94 return new StringRepresentation("<html><body>error3a</body></html>");
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95 }
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96 }
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97
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98
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99 if (!url.startsWith("http")) { // relative url
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100 url="http://"+eScidocServer+":"+eScidocPort+url;
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101 }
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102
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103 StringRepresentation repr = new StringRepresentation(url);
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104 getResponse().redirectPermanent(url);
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105 return repr;
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106 }
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107 }
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