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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 | +} | |