Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/ProxyServlet.java @ 5818:a4ff4167be1e

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
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>
date Wed, 24 Apr 2013 17:33:27 +0200
parents 92239b53823f
children
rev   line source
3497
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
1 package de.intevation.flys.client.server;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
2
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
3 import java.io.InputStream;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
4 import java.io.IOException;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
5 import java.io.OutputStream;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
6 import java.util.Enumeration;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
7
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
8 import javax.servlet.ServletConfig;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
9 import javax.servlet.http.HttpServlet;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
10 import javax.servlet.http.HttpServletRequest;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
11 import javax.servlet.http.HttpServletResponse;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
12 import javax.servlet.http.HttpSession;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
13
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
14 import org.apache.http.Header;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
15 import org.apache.http.HttpEntity;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
16 import org.apache.http.HttpResponse;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
17 import org.apache.http.StatusLine;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
18 import org.apache.http.client.HttpClient;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
19 import org.apache.http.client.methods.HttpGet;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
20 import org.apache.http.impl.client.DefaultHttpClient;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
21
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
22 import org.apache.log4j.Logger;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
23
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
24 import de.intevation.flys.client.server.auth.User;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
25
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
26 /**
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
27 * Implements a Proxy for HTTP Requests
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
28 */
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
29 public class ProxyServlet
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
30 extends HttpServlet
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
31 {
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
32 private static Logger logger = Logger.getLogger(ProxyServlet.class);
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
33 private String remoteurl;
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
34
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
35 @Override
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
36 public void init(ServletConfig config) {
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
37 this.remoteurl = config.getInitParameter("remoteurl");
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
38 }
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
39
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
40 @Override
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
41 public void doPost(HttpServletRequest req, HttpServletResponse resp) {
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
42 }
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
43
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
44 @Override
3498
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
45 public void doGet(HttpServletRequest req, HttpServletResponse resp)
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
46 throws IOException {
3497
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
47 HttpClient httpclient = new DefaultHttpClient();
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
48
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
49 String requesturi = req.getRequestURI();
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
50 String query = req.getQueryString();
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
51
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
52 HttpGet httpget = new HttpGet(this.remoteurl + "?" + query);
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
53
3498
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
54 boolean debug = logger.isDebugEnabled();
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
55
3497
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
56 for (Enumeration e = req.getHeaderNames(); e.hasMoreElements();) {
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
57 String name = (String)e.nextElement();
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
58 for (Enumeration f = req.getHeaders(name); f.hasMoreElements();) {
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
59 String value = (String)f.nextElement();
3498
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
60 if (debug) {
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
61 logger.debug(
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
62 "Adding request header " + name + " : " + value);
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
63 }
3497
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
64 httpget.addHeader(name, value);
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
65 }
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
66 }
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
67
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
68 HttpResponse response = httpclient.execute(httpget);
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
69
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
70 StatusLine statusline = response.getStatusLine();
3498
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
71 if (debug) {
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
72 logger.debug("Response statuscode " + statusline.getStatusCode());
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
73 }
3497
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
74 resp.setStatus(statusline.getStatusCode());
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
75
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
76 Header[] headers = response.getAllHeaders();
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
77 for(Header header : headers) {
3498
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
78 if (debug) {
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
79 logger.debug(
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
80 "Adding response header " + header.getName() +
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
81 " : " + header.getValue());
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
82 }
3497
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
83 resp.setHeader(header.getName(), header.getValue());
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
84 }
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
85
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
86 HttpEntity entity = response.getEntity();
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
87 if (entity != null) {
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
88 InputStream instream = entity.getContent();
3498
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
89 byte [] buf = new byte[4096];
3497
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
90 try {
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
91 OutputStream outstream = resp.getOutputStream();
3498
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
92 try {
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
93 int read;
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
94 while ((read = instream.read(buf)) >= 0) {
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
95 outstream.write(buf, 0, read);
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
96 }
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
97 outstream.flush();
3497
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
98 }
3498
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
99 finally {
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
100 outstream.close();
92239b53823f ProxyServlet: Use block instead of byte wise copy.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3497
diff changeset
101 }
3497
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
102 }
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
103 finally {
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
104 instream.close();
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
105 }
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
106 }
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
107 }
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
108
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
109 private User getUser(HttpServletRequest req) {
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
110 HttpSession session = req.getSession();
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
111 return (User)session.getAttribute("user");
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
112 }
88feb3347aa5 Implement a ProxyServlet
Bjoern Ricks <bjoern.ricks@intevation.de>
parents:
diff changeset
113 }
http://dive4elements.wald.intevation.org