Mercurial > dive4elements > river
view flys-aft/src/main/java/de/intevation/aft/Notification.java @ 4421:0b0f415203f0
Add new Filter class to change caching
Add new Filter class to avoid caching of GWT nocache files in browsers and http
proxies. The new Filter class NoCacheFilter sets http headers to stop the
proxies and browesers from storing the nocache files.
author | Björn Ricks <bjoern.ricks@intevation.de> |
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date | Tue, 06 Nov 2012 13:32:06 +0100 |
parents | 06891562e633 |
children | f939e1e6cfa4 |
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package de.intevation.aft; import de.intevation.utils.XML; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.URL; import java.net.URLConnection; import java.net.HttpURLConnection; import org.w3c.dom.Document; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import org.apache.log4j.Logger; public class Notification { private static Logger log = Logger.getLogger(Notification.class); protected Document message; public Notification() { } public Notification(Document message) { this.message = message; } public Notification(Node message) { this(wrap(message)); } public static Document wrap(Node node) { Document document = XML.newDocument(); // Send first element as message. // Fall back to root node. Node toImport = node; NodeList children = node.getChildNodes(); for (int i = 0, N = children.getLength(); i < N; ++i) { Node child = children.item(i); if (child.getNodeType() == Node.ELEMENT_NODE) { toImport = child; break; } } toImport = document.importNode(toImport, true); document.appendChild(toImport); document.normalizeDocument(); return document; } public Document sendPOST(URL url) { OutputStream out = null; InputStream in = null; Document result = null; try { URLConnection ucon = url.openConnection(); if (!(ucon instanceof HttpURLConnection)) { log.warn("NOTIFY: '" + url + "' is not an HTTP(S) connection."); return null; } HttpURLConnection con = (HttpURLConnection)ucon; con.setRequestMethod("POST"); con.setDoInput(true); con.setDoOutput(true); con.setUseCaches(false); con.setRequestProperty("Content-Type", "text/xml"); out = con.getOutputStream(); XML.toStream(message, out); out.flush(); in = con.getInputStream(); result = XML.parseDocument(in); } catch (IOException ioe) { log.error("NOTIFY: Sending message to '" + url + "' failed.", ioe); } finally { if (out != null) { try { out.close(); } catch (IOException ioe) {} } if (in != null) { try { in.close(); } catch (IOException ioe) {} } } return result; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :