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annotate src/ch/ethz/ssh2/transport/HTTPProxyClientTransportManager.java @ 380:162c001c8142

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fix url link in help file
author Carl Byington <carl@five-ten-sg.com>
date Mon, 04 Aug 2014 15:25:34 -0700
parents 071eccdff8ea
children
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1 package ch.ethz.ssh2.transport;
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2
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3 import java.io.IOException;
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4 import java.io.InputStream;
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5 import java.io.InputStreamReader;
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6 import java.io.LineNumberReader;
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7 import java.io.OutputStream;
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8 import java.net.InetSocketAddress;
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9 import java.net.Socket;
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10
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11 import ch.ethz.ssh2.HTTPProxyData;
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12 import ch.ethz.ssh2.HTTPProxyException;
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13 import ch.ethz.ssh2.crypto.Base64;
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14 import ch.ethz.ssh2.util.StringEncoder;
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15
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16 /**
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17 * @version $Id: HTTPProxyClientTransportManager.java 155 2014-04-28 12:01:19Z dkocher@sudo.ch $
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18 */
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19 public class HTTPProxyClientTransportManager extends ClientTransportManager {
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20
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21 /**
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22 * Used to tell the library that the connection shall be established through a proxy server.
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23 */
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24
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25 private HTTPProxyData pd;
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26
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27 private final Socket sock;
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29 public HTTPProxyClientTransportManager(final Socket socket, final HTTPProxyData pd) {
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30 super(socket);
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31 this.sock = socket;
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32 this.pd = pd;
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33 }
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34
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35 @Override
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36 protected void connect(final String hostname, final int port, final int connectTimeout) throws IOException {
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37 sock.connect(new InetSocketAddress(pd.proxyHost, pd.proxyPort), connectTimeout);
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38 // Tell the proxy where we actually want to connect to
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39 StringBuilder sb = new StringBuilder();
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40 sb.append("CONNECT ");
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41 sb.append(hostname);
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42 sb.append(':');
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43 sb.append(port);
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44 sb.append(" HTTP/1.0\r\n");
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45
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46 if ((pd.proxyUser != null) && (pd.proxyPass != null)) {
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47 String credentials = pd.proxyUser + ":" + pd.proxyPass;
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48 char[] encoded = Base64.encode(StringEncoder.GetBytes(credentials));
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49 sb.append("Proxy-Authorization: Basic ");
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50 sb.append(encoded);
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51 sb.append("\r\n");
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52 }
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53
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54 if (pd.requestHeaderLines != null) {
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55 for (int i = 0; i < pd.requestHeaderLines.length; i++) {
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56 if (pd.requestHeaderLines[i] != null) {
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57 sb.append(pd.requestHeaderLines[i]);
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58 sb.append("\r\n");
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59 }
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60 }
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61 }
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62
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63 sb.append("\r\n");
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64 OutputStream out = sock.getOutputStream();
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65 out.write(StringEncoder.GetBytes(sb.toString()));
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66 out.flush();
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67 // Parse the HTTP response
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68 InputStream in = sock.getInputStream();
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69 final LineNumberReader reader = new LineNumberReader(new InputStreamReader(in));
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70 String httpReponse = reader.readLine();
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71
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72 if (!httpReponse.startsWith("HTTP/")) {
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73 throw new IOException("The proxy did not send back a valid HTTP response.");
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74 }
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75
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76 // "HTTP/1.X XYZ X" => 14 characters minimum
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78 if ((httpReponse.length() < 14) || (httpReponse.charAt(8) != ' ') || (httpReponse.charAt(12) != ' ')) {
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79 throw new IOException("The proxy did not send back a valid HTTP response.");
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80 }
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81
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82 int errorCode;
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83
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84 try {
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85 errorCode = Integer.parseInt(httpReponse.substring(9, 12));
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86 }
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87 catch (NumberFormatException ignore) {
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88 throw new IOException("The proxy did not send back a valid HTTP response.");
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89 }
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90
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91 if ((errorCode < 0) || (errorCode > 999)) {
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92 throw new IOException("The proxy did not send back a valid HTTP response.");
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93 }
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94
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95 if (errorCode != 200) {
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96 throw new HTTPProxyException(httpReponse.substring(13), errorCode);
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97 }
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98
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99 while (reader.readLine() != null) {
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100 // Read until empty line
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101 }
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102 }
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103 }