1 /* |
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2 * Copyright (c) 1996, 2004, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 package sun.net.www.protocol.gopher; |
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26 |
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27 import java.io.*; |
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28 import java.util.*; |
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29 import java.net.*; |
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30 import sun.net.www.*; |
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31 import sun.net.NetworkClient; |
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32 import java.net.URL; |
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33 import java.net.URLStreamHandler; |
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34 |
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35 import sun.security.action.GetBooleanAction; |
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36 |
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37 /** Class to maintain the state of a gopher fetch and handle the protocol */ |
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38 public class GopherClient extends NetworkClient implements Runnable { |
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39 |
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40 /* The following three data members are left in for binary |
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41 * backwards-compatibility. Unfortunately, HotJava sets them directly |
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42 * when it wants to change the settings. The new design has us not |
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43 * cache these, so this is unnecessary, but eliminating the data members |
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44 * would break HJB 1.1 under JDK 1.2. |
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45 * |
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46 * These data members are not used, and their values are meaningless. |
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47 * REMIND: Take them out for JDK 2.0! |
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48 */ |
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49 |
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50 /** |
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51 * @deprecated |
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52 */ |
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53 @Deprecated |
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54 public static boolean useGopherProxy; |
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55 |
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56 /** |
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57 * @deprecated |
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58 */ |
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59 @Deprecated |
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60 public static String gopherProxyHost; |
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61 |
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62 /** |
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63 * @deprecated |
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64 */ |
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65 @Deprecated |
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66 public static int gopherProxyPort; |
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67 |
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68 |
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69 static { |
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70 useGopherProxy = java.security.AccessController.doPrivileged( |
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71 new sun.security.action.GetBooleanAction("gopherProxySet")) |
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72 .booleanValue(); |
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73 |
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74 gopherProxyHost = java.security.AccessController.doPrivileged( |
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75 new sun.security.action.GetPropertyAction("gopherProxyHost")); |
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76 |
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77 gopherProxyPort = java.security.AccessController.doPrivileged( |
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78 new sun.security.action.GetIntegerAction("gopherProxyPort", 80)) |
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79 .intValue(); |
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80 } |
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81 |
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82 PipedOutputStream os; |
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83 URL u; |
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84 int gtype; |
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85 String gkey; |
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86 sun.net.www.URLConnection connection; |
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87 |
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88 GopherClient(sun.net.www.URLConnection connection) { |
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89 this.connection = connection; |
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90 } |
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91 |
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92 /** |
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93 * @return true if gopher connections should go through a proxy, according |
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94 * to system properties. |
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95 */ |
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96 public static boolean getUseGopherProxy() { |
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97 return java.security.AccessController.doPrivileged( |
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98 new GetBooleanAction("gopherProxySet")).booleanValue(); |
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99 } |
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100 |
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101 /** |
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102 * @return the proxy host to use, or null if nothing is set. |
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103 */ |
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104 public static String getGopherProxyHost() { |
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105 String host = java.security.AccessController.doPrivileged( |
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106 new sun.security.action.GetPropertyAction("gopherProxyHost")); |
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107 if ("".equals(host)) { |
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108 host = null; |
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109 } |
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110 return host; |
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111 } |
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112 |
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113 /** |
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114 * @return the proxy port to use. Will default reasonably. |
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115 */ |
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116 public static int getGopherProxyPort() { |
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117 return java.security.AccessController.doPrivileged( |
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118 new sun.security.action.GetIntegerAction("gopherProxyPort", 80)) |
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119 .intValue(); |
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120 } |
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121 |
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122 /** Given a url, setup to fetch the gopher document it refers to */ |
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123 InputStream openStream(URL u) throws IOException { |
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124 this.u = u; |
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125 this.os = os; |
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126 int i = 0; |
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127 String s = u.getFile(); |
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128 int limit = s.length(); |
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129 int c = '1'; |
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130 while (i < limit && (c = s.charAt(i)) == '/') |
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131 i++; |
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132 gtype = c == '/' ? '1' : c; |
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133 if (i < limit) |
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134 i++; |
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135 gkey = s.substring(i); |
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136 |
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137 openServer(u.getHost(), u.getPort() <= 0 ? 70 : u.getPort()); |
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138 |
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139 MessageHeader msgh = new MessageHeader(); |
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140 |
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141 switch (gtype) { |
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142 case '0': |
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143 case '7': |
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144 msgh.add("content-type", "text/plain"); |
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145 break; |
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146 case '1': |
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147 msgh.add("content-type", "text/html"); |
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148 break; |
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149 case 'g': |
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150 case 'I': |
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151 msgh.add("content-type", "image/gif"); |
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152 break; |
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153 default: |
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154 msgh.add("content-type", "content/unknown"); |
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155 break; |
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156 } |
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157 if (gtype != '7') { |
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158 serverOutput.print(decodePercent(gkey) + "\r\n"); |
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159 serverOutput.flush(); |
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160 } else if ((i = gkey.indexOf('?')) >= 0) { |
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161 serverOutput.print(decodePercent(gkey.substring(0, i) + "\t" + |
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162 gkey.substring(i + 1) + "\r\n")); |
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163 serverOutput.flush(); |
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164 msgh.add("content-type", "text/html"); |
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165 } else { |
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166 msgh.add("content-type", "text/html"); |
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167 } |
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168 connection.setProperties(msgh); |
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169 if (msgh.findValue("content-type") == "text/html") { |
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170 os = new PipedOutputStream(); |
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171 PipedInputStream ret = new PipedInputStream(); |
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172 ret.connect(os); |
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173 new Thread(this).start(); |
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174 return ret; |
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175 } |
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176 return new GopherInputStream(this, serverInput); |
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177 } |
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178 |
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179 /** Translate all the instances of %NN into the character they represent */ |
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180 private String decodePercent(String s) { |
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181 if (s == null || s.indexOf('%') < 0) |
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182 return s; |
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183 int limit = s.length(); |
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184 char d[] = new char[limit]; |
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185 int dp = 0; |
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186 for (int sp = 0; sp < limit; sp++) { |
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187 int c = s.charAt(sp); |
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188 if (c == '%' && sp + 2 < limit) { |
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189 int s1 = s.charAt(sp + 1); |
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190 int s2 = s.charAt(sp + 2); |
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191 if ('0' <= s1 && s1 <= '9') |
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192 s1 = s1 - '0'; |
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193 else if ('a' <= s1 && s1 <= 'f') |
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194 s1 = s1 - 'a' + 10; |
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195 else if ('A' <= s1 && s1 <= 'F') |
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196 s1 = s1 - 'A' + 10; |
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197 else |
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198 s1 = -1; |
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199 if ('0' <= s2 && s2 <= '9') |
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200 s2 = s2 - '0'; |
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201 else if ('a' <= s2 && s2 <= 'f') |
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202 s2 = s2 - 'a' + 10; |
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203 else if ('A' <= s2 && s2 <= 'F') |
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204 s2 = s2 - 'A' + 10; |
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205 else |
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206 s2 = -1; |
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207 if (s1 >= 0 && s2 >= 0) { |
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208 c = (s1 << 4) | s2; |
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209 sp += 2; |
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210 } |
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211 } |
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212 d[dp++] = (char) c; |
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213 } |
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214 return new String(d, 0, dp); |
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215 } |
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216 |
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217 /** Turn special characters into the %NN form */ |
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218 private String encodePercent(String s) { |
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219 if (s == null) |
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220 return s; |
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221 int limit = s.length(); |
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222 char d[] = null; |
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223 int dp = 0; |
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224 for (int sp = 0; sp < limit; sp++) { |
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225 int c = s.charAt(sp); |
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226 if (c <= ' ' || c == '"' || c == '%') { |
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227 if (d == null) |
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228 d = s.toCharArray(); |
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229 if (dp + 3 >= d.length) { |
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230 char nd[] = new char[dp + 10]; |
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231 System.arraycopy(d, 0, nd, 0, dp); |
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232 d = nd; |
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233 } |
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234 d[dp] = '%'; |
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235 int dig = (c >> 4) & 0xF; |
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236 d[dp + 1] = (char) (dig < 10 ? '0' + dig : 'A' - 10 + dig); |
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237 dig = c & 0xF; |
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238 d[dp + 2] = (char) (dig < 10 ? '0' + dig : 'A' - 10 + dig); |
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239 dp += 3; |
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240 } else { |
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241 if (d != null) { |
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242 if (dp >= d.length) { |
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243 char nd[] = new char[dp + 10]; |
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244 System.arraycopy(d, 0, nd, 0, dp); |
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245 d = nd; |
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246 } |
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247 d[dp] = (char) c; |
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248 } |
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249 dp++; |
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250 } |
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251 } |
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252 return d == null ? s : new String(d, 0, dp); |
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253 } |
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254 |
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255 /** This method is run as a seperate thread when an incoming gopher |
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256 document requires translation to html */ |
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257 public void run() { |
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258 int qpos = -1; |
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259 try { |
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260 if (gtype == '7' && (qpos = gkey.indexOf('?')) < 0) { |
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261 PrintStream ps = new PrintStream(os, false, encoding); |
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262 ps.print("<html><head><title>Searchable Gopher Index</title></head>\n<body><h1>Searchable Gopher Index</h1><isindex>\n</body></html>\n"); |
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263 } else if (gtype != '1' && gtype != '7') { |
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264 byte buf[] = new byte[2048]; |
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265 try { |
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266 int n; |
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267 while ((n = serverInput.read(buf)) >= 0) |
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268 os.write(buf, 0, n); |
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269 } catch(Exception e) { |
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270 } |
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271 } else { |
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272 PrintStream ps = new PrintStream(os, false, encoding); |
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273 String title = null; |
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274 if (gtype == '7') |
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275 title = "Results of searching for \"" + gkey.substring(qpos + 1) |
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276 + "\" on " + u.getHost(); |
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277 else |
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278 title = "Gopher directory " + gkey + " from " + u.getHost(); |
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279 ps.print("<html><head><title>"); |
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280 ps.print(title); |
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281 ps.print("</title></head>\n<body>\n<H1>"); |
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282 ps.print(title); |
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283 ps.print("</h1><dl compact>\n"); |
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284 BufferedReader ds = new BufferedReader(new InputStreamReader(serverInput)); |
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285 String s; |
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286 while ((s = ds.readLine()) != null) { |
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287 int len = s.length(); |
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288 while (len > 0 && s.charAt(len - 1) <= ' ') |
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289 len--; |
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290 if (len <= 0) |
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291 continue; |
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292 int key = s.charAt(0); |
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293 int t1 = s.indexOf('\t'); |
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294 int t2 = t1 > 0 ? s.indexOf('\t', t1 + 1) : -1; |
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295 int t3 = t2 > 0 ? s.indexOf('\t', t2 + 1) : -1; |
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296 if (t3 < 0) { |
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297 // ps.print("<br><i>"+s+"</i>\n"); |
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298 continue; |
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299 } |
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300 String port = t3 + 1 < len ? ":" + s.substring(t3 + 1, len) : ""; |
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301 String host = t2 + 1 < t3 ? s.substring(t2 + 1, t3) : u.getHost(); |
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302 ps.print("<dt><a href=\"gopher://" + host + port + "/" |
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303 + s.substring(0, 1) + encodePercent(s.substring(t1 + 1, t2)) + "\">\n"); |
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304 ps.print("<img align=middle border=0 width=25 height=32 src="); |
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305 switch (key) { |
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306 default: |
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307 ps.print(System.getProperty("java.net.ftp.imagepath.file")); |
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308 break; |
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309 case '0': |
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310 ps.print(System.getProperty("java.net.ftp.imagepath.text")); |
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311 break; |
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312 case '1': |
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313 ps.print(System.getProperty("java.net.ftp.imagepath.directory")); |
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314 break; |
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315 case 'g': |
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316 ps.print(System.getProperty("java.net.ftp.imagepath.gif")); |
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317 break; |
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318 } |
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319 ps.print(".gif align=middle><dd>\n"); |
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320 ps.print(s.substring(1, t1) + "</a>\n"); |
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321 } |
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322 ps.print("</dl></body>\n"); |
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323 ps.close(); |
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324 } |
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325 |
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326 } catch (UnsupportedEncodingException e) { |
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327 throw new InternalError(encoding+ " encoding not found", e); |
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328 } catch (IOException e) { |
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329 } finally { |
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330 try { |
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331 closeServer(); |
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332 os.close(); |
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333 } catch (IOException e2) { |
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334 } |
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335 } |
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336 } |
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337 } |
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338 |
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339 /** An input stream that does nothing more than hold on to the NetworkClient |
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340 that created it. This is used when only the input stream is needed, and |
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341 the network client needs to be closed when the input stream is closed. */ |
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342 class GopherInputStream extends FilterInputStream { |
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343 NetworkClient parent; |
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344 |
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345 GopherInputStream(NetworkClient o, InputStream fd) { |
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346 super(fd); |
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347 parent = o; |
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348 } |
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349 |
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350 public void close() { |
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351 try { |
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352 parent.closeServer(); |
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353 super.close(); |
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354 } catch (IOException e) { |
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355 } |
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356 } |
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357 } |
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