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