Shuyi Chen | d7955ce | 2013-05-22 14:51:55 -0700 | [diff] [blame] | 1 | /** |
| 2 | * $RCSfile$ |
| 3 | * $Revision$ |
| 4 | * $Date$ |
| 5 | * |
| 6 | * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | */ |
| 18 | package org.jivesoftware.smack.proxy; |
| 19 | |
| 20 | import java.io.BufferedReader; |
| 21 | import java.io.IOException; |
| 22 | import java.io.InputStream; |
| 23 | import java.io.StringReader; |
| 24 | import java.net.HttpURLConnection; |
| 25 | import java.net.InetAddress; |
| 26 | import java.net.Socket; |
| 27 | import java.net.UnknownHostException; |
| 28 | import javax.net.SocketFactory; |
| 29 | import org.jivesoftware.smack.util.StringUtils; |
| 30 | |
| 31 | import java.util.regex.Matcher; |
| 32 | import java.util.regex.Pattern; |
| 33 | |
| 34 | /** |
| 35 | * Http Proxy Socket Factory which returns socket connected to Http Proxy |
| 36 | * |
| 37 | * @author Atul Aggarwal |
| 38 | */ |
| 39 | class HTTPProxySocketFactory |
| 40 | extends SocketFactory |
| 41 | { |
| 42 | |
| 43 | private ProxyInfo proxy; |
| 44 | |
| 45 | public HTTPProxySocketFactory(ProxyInfo proxy) |
| 46 | { |
| 47 | this.proxy = proxy; |
| 48 | } |
| 49 | |
| 50 | public Socket createSocket(String host, int port) |
| 51 | throws IOException, UnknownHostException |
| 52 | { |
| 53 | return httpProxifiedSocket(host, port); |
| 54 | } |
| 55 | |
| 56 | public Socket createSocket(String host ,int port, InetAddress localHost, |
| 57 | int localPort) |
| 58 | throws IOException, UnknownHostException |
| 59 | { |
| 60 | return httpProxifiedSocket(host, port); |
| 61 | } |
| 62 | |
| 63 | public Socket createSocket(InetAddress host, int port) |
| 64 | throws IOException |
| 65 | { |
| 66 | return httpProxifiedSocket(host.getHostAddress(), port); |
| 67 | |
| 68 | } |
| 69 | |
| 70 | public Socket createSocket( InetAddress address, int port, |
| 71 | InetAddress localAddress, int localPort) |
| 72 | throws IOException |
| 73 | { |
| 74 | return httpProxifiedSocket(address.getHostAddress(), port); |
| 75 | } |
| 76 | |
| 77 | private Socket httpProxifiedSocket(String host, int port) |
| 78 | throws IOException |
| 79 | { |
| 80 | String proxyhost = proxy.getProxyAddress(); |
| 81 | int proxyPort = proxy.getProxyPort(); |
| 82 | Socket socket = new Socket(proxyhost,proxyPort); |
| 83 | String hostport = "CONNECT " + host + ":" + port; |
| 84 | String proxyLine; |
| 85 | String username = proxy.getProxyUsername(); |
| 86 | if (username == null) |
| 87 | { |
| 88 | proxyLine = ""; |
| 89 | } |
| 90 | else |
| 91 | { |
| 92 | String password = proxy.getProxyPassword(); |
| 93 | proxyLine = "\r\nProxy-Authorization: Basic " + StringUtils.encodeBase64(username + ":" + password); |
| 94 | } |
| 95 | socket.getOutputStream().write((hostport + " HTTP/1.1\r\nHost: " |
| 96 | + hostport + proxyLine + "\r\n\r\n").getBytes("UTF-8")); |
| 97 | |
| 98 | InputStream in = socket.getInputStream(); |
| 99 | StringBuilder got = new StringBuilder(100); |
| 100 | int nlchars = 0; |
| 101 | |
| 102 | while (true) |
| 103 | { |
| 104 | char c = (char) in.read(); |
| 105 | got.append(c); |
| 106 | if (got.length() > 1024) |
| 107 | { |
| 108 | throw new ProxyException(ProxyInfo.ProxyType.HTTP, "Recieved " + |
| 109 | "header of >1024 characters from " |
| 110 | + proxyhost + ", cancelling connection"); |
| 111 | } |
| 112 | if (c == -1) |
| 113 | { |
| 114 | throw new ProxyException(ProxyInfo.ProxyType.HTTP); |
| 115 | } |
| 116 | if ((nlchars == 0 || nlchars == 2) && c == '\r') |
| 117 | { |
| 118 | nlchars++; |
| 119 | } |
| 120 | else if ((nlchars == 1 || nlchars == 3) && c == '\n') |
| 121 | { |
| 122 | nlchars++; |
| 123 | } |
| 124 | else |
| 125 | { |
| 126 | nlchars = 0; |
| 127 | } |
| 128 | if (nlchars == 4) |
| 129 | { |
| 130 | break; |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | if (nlchars != 4) |
| 135 | { |
| 136 | throw new ProxyException(ProxyInfo.ProxyType.HTTP, "Never " + |
| 137 | "received blank line from " |
| 138 | + proxyhost + ", cancelling connection"); |
| 139 | } |
| 140 | |
| 141 | String gotstr = got.toString(); |
| 142 | |
| 143 | BufferedReader br = new BufferedReader(new StringReader(gotstr)); |
| 144 | String response = br.readLine(); |
| 145 | |
| 146 | if (response == null) |
| 147 | { |
| 148 | throw new ProxyException(ProxyInfo.ProxyType.HTTP, "Empty proxy " + |
| 149 | "response from " + proxyhost + ", cancelling"); |
| 150 | } |
| 151 | |
| 152 | Matcher m = RESPONSE_PATTERN.matcher(response); |
| 153 | if (!m.matches()) |
| 154 | { |
| 155 | throw new ProxyException(ProxyInfo.ProxyType.HTTP , "Unexpected " + |
| 156 | "proxy response from " + proxyhost + ": " + response); |
| 157 | } |
| 158 | |
| 159 | int code = Integer.parseInt(m.group(1)); |
| 160 | |
| 161 | if (code != HttpURLConnection.HTTP_OK) |
| 162 | { |
| 163 | throw new ProxyException(ProxyInfo.ProxyType.HTTP); |
| 164 | } |
| 165 | |
| 166 | return socket; |
| 167 | } |
| 168 | |
| 169 | private static final Pattern RESPONSE_PATTERN |
| 170 | = Pattern.compile("HTTP/\\S+\\s(\\d+)\\s(.*)\\s*"); |
| 171 | |
| 172 | } |