Mercurial > hg > eSciDocMPIWGServicesRestlet
view src/de/mpiwg/itgroup/escidoc/MPIWGServices/Restlet/services/redirect/ComponentURLRedirector.java @ 3:498b68667ff3
Neuer Mechanismus zum umleiten der Quellen.
author | dwinter |
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date | Fri, 20 Apr 2012 15:55:51 +0200 |
parents | 1aac45997235 |
children |
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package de.mpiwg.itgroup.escidoc.MPIWGServices.Restlet.services.redirect; import java.io.IOException; import java.io.InputStream; import java.util.Properties; import org.apache.http.HttpResponse; import org.jdom.Attribute; import org.jdom.Document; import org.jdom.JDOMException; import org.jdom.input.SAXBuilder; import org.jdom.xpath.XPath; import org.restlet.data.Status; import org.restlet.representation.Representation; import org.restlet.representation.StringRepresentation; import org.restlet.resource.Get; import org.restlet.resource.ServerResource; import de.mpiwg.itgroup.eSciDoc.Tools.EScidocBasicHandler; import de.mpiwg.itgroup.eSciDoc.Tools.EScidocTools; public class ComponentURLRedirector extends ServerResource{ private String eScidocServer; private String eScidocPort; private String content_cat; private String eScidocUser; private String eScidocUserPW; public ComponentURLRedirector(String content_cat) throws IOException{ this.content_cat = content_cat; InputStream is = getClass().getResourceAsStream("/de/mpiwg/itgroup/escidoc/MPIWGServices/Restlet/config/eScidocServer.config"); Properties prop = new Properties(); prop.load(is); eScidocServer= (String)prop.get("eScidocServer"); eScidocPort=(String)prop.get("eScidocPort"); eScidocUser = (String)prop.get("eScidocUser"); eScidocUserPW=(String)prop.get("eScidocUserPW"); } @Get("html") public Representation getHtml() { String id = (String)getRequest().getAttributes().get("escidocId"); EScidocBasicHandler handler = null; if (getContext().getAttributes().containsKey("escidocHandler")){ handler = (EScidocBasicHandler) getContext().getAttributes().get("escidocHandler"); } if (handler==null){ handler = new EScidocBasicHandler(eScidocServer, Integer.valueOf(eScidocPort),eScidocUser,eScidocUserPW); } HttpResponse resp; try { resp = handler.eScidocGet("/ir/item/"+id); } catch (IOException e) { setStatus(Status.SERVER_ERROR_INTERNAL); return new StringRepresentation("<html><body>error1</body></html>"); } int code = resp.getStatusLine().getStatusCode(); if (code!=200){ setStatus(new Status(code)); return new StringRepresentation("<html><body>error2</body></html>"); } Document doc; String url; try { doc = new SAXBuilder().build(resp.getEntity().getContent()); XPath xp= EScidocTools.getESciDocXpath("//escidocComponents:component[escidocComponents:properties/prop:content-category[text()='"+content_cat+"']]/escidocComponents:content/@xlink:href"); Attribute item = (Attribute)xp.selectSingleNode(doc); url = item.getValue(); } catch (Exception e) { if (content_cat.equals("display_url")) // wenn display und error dann versuche genrische anzeige der bilder { url="./images"; StringRepresentation repr = new StringRepresentation(url); getResponse().redirectPermanent(url); return repr; } else { setStatus(Status.SERVER_ERROR_INTERNAL); return new StringRepresentation("<html><body>error3a</body></html>"); } } if (!url.startsWith("http")) { // relative url url="http://"+eScidocServer+":"+eScidocPort+url; } StringRepresentation repr = new StringRepresentation(url); getResponse().redirectPermanent(url); return repr; } }