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annotate src/ch/ethz/ssh2/transport/HTTPProxyClientTransportManager.java @ 274:82bd20cb0d1d ganymed

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start conversion from trilead to ganymed
author Carl Byington <carl@five-ten-sg.com>
date Fri, 18 Jul 2014 11:32:32 -0700
parents 91a31873c42a
children 071eccdff8ea
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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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28
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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
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38 sock.connect(new InetSocketAddress(pd.proxyHost, pd.proxyPort), connectTimeout);
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39
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40 // Tell the proxy where we actually want to connect to
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41 StringBuilder sb = new StringBuilder();
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42
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43 sb.append("CONNECT ");
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44 sb.append(hostname);
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45 sb.append(':');
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46 sb.append(port);
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47 sb.append(" HTTP/1.0\r\n");
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48
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49 if((pd.proxyUser != null) && (pd.proxyPass != null)) {
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50 String credentials = pd.proxyUser + ":" + pd.proxyPass;
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51 char[] encoded = Base64.encode(StringEncoder.GetBytes(credentials));
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52 sb.append("Proxy-Authorization: Basic ");
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53 sb.append(encoded);
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54 sb.append("\r\n");
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55 }
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56
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57 if(pd.requestHeaderLines != null) {
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58 for(int i = 0; i < pd.requestHeaderLines.length; i++) {
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59 if(pd.requestHeaderLines[i] != null) {
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60 sb.append(pd.requestHeaderLines[i]);
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61 sb.append("\r\n");
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62 }
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63 }
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64 }
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65
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66 sb.append("\r\n");
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67
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68 OutputStream out = sock.getOutputStream();
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69
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70 out.write(StringEncoder.GetBytes(sb.toString()));
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71 out.flush();
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72
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73 // Parse the HTTP response
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74
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75 InputStream in = sock.getInputStream();
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76
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77 final LineNumberReader reader = new LineNumberReader(new InputStreamReader(in));
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78 String httpReponse = reader.readLine();
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79
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80 if(!httpReponse.startsWith("HTTP/")) {
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81 throw new IOException("The proxy did not send back a valid HTTP response.");
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82 }
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83
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84 // "HTTP/1.X XYZ X" => 14 characters minimum
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85
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86 if((httpReponse.length() < 14) || (httpReponse.charAt(8) != ' ') || (httpReponse.charAt(12) != ' ')) {
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87 throw new IOException("The proxy did not send back a valid HTTP response.");
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88 }
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89
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90 int errorCode;
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91
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92 try {
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93 errorCode = Integer.parseInt(httpReponse.substring(9, 12));
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94 }
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95 catch(NumberFormatException ignore) {
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96 throw new IOException("The proxy did not send back a valid HTTP response.");
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97 }
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98
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99 if((errorCode < 0) || (errorCode > 999)) {
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100 throw new IOException("The proxy did not send back a valid HTTP response.");
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101 }
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102
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103 if(errorCode != 200) {
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104 throw new HTTPProxyException(httpReponse.substring(13), errorCode);
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105 }
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106
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107 while(reader.readLine() != null) {
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108 // Read until empty line
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109 }
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110 }
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111 }