Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/ProxyServlet.java @ 5818:a4ff4167be1e
Request feature info on all layers and show it as html if
the server does not return valid gml.
Non queryable layers produce an error message when the request
fails. This is good enough
author | Andre Heinecke <aheinecke@intevation.de> |
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date | Wed, 24 Apr 2013 17:33:27 +0200 |
parents | 92239b53823f |
children |
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package de.intevation.flys.client.server; import java.io.InputStream; import java.io.IOException; import java.io.OutputStream; import java.util.Enumeration; import javax.servlet.ServletConfig; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.apache.http.Header; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.StatusLine; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.log4j.Logger; import de.intevation.flys.client.server.auth.User; /** * Implements a Proxy for HTTP Requests */ public class ProxyServlet extends HttpServlet { private static Logger logger = Logger.getLogger(ProxyServlet.class); private String remoteurl; @Override public void init(ServletConfig config) { this.remoteurl = config.getInitParameter("remoteurl"); } @Override public void doPost(HttpServletRequest req, HttpServletResponse resp) { } @Override public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException { HttpClient httpclient = new DefaultHttpClient(); String requesturi = req.getRequestURI(); String query = req.getQueryString(); HttpGet httpget = new HttpGet(this.remoteurl + "?" + query); boolean debug = logger.isDebugEnabled(); for (Enumeration e = req.getHeaderNames(); e.hasMoreElements();) { String name = (String)e.nextElement(); for (Enumeration f = req.getHeaders(name); f.hasMoreElements();) { String value = (String)f.nextElement(); if (debug) { logger.debug( "Adding request header " + name + " : " + value); } httpget.addHeader(name, value); } } HttpResponse response = httpclient.execute(httpget); StatusLine statusline = response.getStatusLine(); if (debug) { logger.debug("Response statuscode " + statusline.getStatusCode()); } resp.setStatus(statusline.getStatusCode()); Header[] headers = response.getAllHeaders(); for(Header header : headers) { if (debug) { logger.debug( "Adding response header " + header.getName() + " : " + header.getValue()); } resp.setHeader(header.getName(), header.getValue()); } HttpEntity entity = response.getEntity(); if (entity != null) { InputStream instream = entity.getContent(); byte [] buf = new byte[4096]; try { OutputStream outstream = resp.getOutputStream(); try { int read; while ((read = instream.read(buf)) >= 0) { outstream.write(buf, 0, read); } outstream.flush(); } finally { outstream.close(); } } finally { instream.close(); } } } private User getUser(HttpServletRequest req) { HttpSession session = req.getSession(); return (User)session.getAttribute("user"); } }