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| 1 | /* | ||
| 2 | * Copyright (c) 1995, 2006, 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 | |||
| 26 | package sun.net.www; | ||
| 27 | |||
| 28 | import java.net.URL; | ||
| 29 | import java.net.ContentHandler; | ||
| 30 | import java.util.*; | ||
| 31 | import java.io.InputStream; | ||
| 32 | import java.io.OutputStream; | ||
| 33 | import java.io.BufferedInputStream; | ||
| 34 | import java.net.UnknownServiceException; | ||
| 35 | |||
| 36 | /** | ||
| 37 | * A class to represent an active connection to an object | ||
| 38 | * represented by a URL. | ||
| 39 | * @author James Gosling | ||
| 40 | */ | ||
| 41 | |||
| 42 | abstract public class URLConnection extends java.net.URLConnection { | ||
| 43 | |||
| 44 | /** The URL that it is connected to */ | ||
| 45 | |||
| 46 | private String contentType; | ||
| 47 | private int contentLength = -1; | ||
| 48 | |||
| 49 | protected MessageHeader properties; | ||
| 50 | |||
| 51 | /** Create a URLConnection object. These should not be created directly: | ||
| 52 | instead they should be created by protocol handers in response to | ||
| 53 | URL.openConnection. | ||
| 54 | @param u The URL that this connects to. | ||
| 55 | */ | ||
| 56 | public URLConnection (URL u) { | ||
| 57 | super(u); | ||
| 58 | properties = new MessageHeader(); | ||
| 59 | } | ||
| 60 | |||
| 61 | /** Call this routine to get the property list for this object. | ||
| 62 | * Properties (like content-type) that have explicit getXX() methods | ||
| 63 | * associated with them should be accessed using those methods. */ | ||
| 64 | public MessageHeader getProperties() { | ||
| 65 | return properties; | ||
| 66 | } | ||
| 67 | |||
| 68 | /** Call this routine to set the property list for this object. */ | ||
| 69 | public void setProperties(MessageHeader properties) { | ||
| 70 | this.properties = properties; | ||
| 71 | } | ||
| 72 | |||
| 73 | public void setRequestProperty(String key, String value) { | ||
| 74 | if(connected) | ||
| 75 | throw new IllegalAccessError("Already connected"); | ||
| 76 | if (key == null) | ||
| 77 | throw new NullPointerException ("key cannot be null"); | ||
| 78 | properties.set(key, value); | ||
| 79 | } | ||
| 80 | |||
| 81 | /** | ||
| 82 | * The following three methods addRequestProperty, getRequestProperty, | ||
| 83 | * and getRequestProperties were copied from the superclass implementation | ||
| 84 | * before it was changed by CR:6230836, to maintain backward compatibility. | ||
| 85 | */ | ||
| 86 | public void addRequestProperty(String key, String value) { | ||
| 87 | if (connected) | ||
| 88 | throw new IllegalStateException("Already connected"); | ||
| 89 | if (key == null) | ||
| 90 | throw new NullPointerException ("key is null"); | ||
| 91 | } | ||
| 92 | |||
| 93 | public String getRequestProperty(String key) { | ||
| 94 | if (connected) | ||
| 95 | throw new IllegalStateException("Already connected"); | ||
| 96 | return null; | ||
| 97 | } | ||
| 98 | |||
| 99 | public Map<String,List<String>> getRequestProperties() { | ||
| 100 | if (connected) | ||
| 101 | throw new IllegalStateException("Already connected"); | ||
| 102 | return Collections.EMPTY_MAP; | ||
| 103 | } | ||
| 104 | |||
| 105 | public String getHeaderField(String name) { | ||
| 106 | try { | ||
| 107 | getInputStream(); | ||
| 108 | } catch (Exception e) { | ||
| 109 | return null; | ||
| 110 | } | ||
| 111 | return properties == null ? null : properties.findValue(name); | ||
| 112 | } | ||
| 113 | |||
| 114 | /** | ||
| 115 | * Return the key for the nth header field. Returns null if | ||
| 116 | * there are fewer than n fields. This can be used to iterate | ||
| 117 | * through all the headers in the message. | ||
| 118 | */ | ||
| 119 | public String getHeaderFieldKey(int n) { | ||
| 120 | try { | ||
| 121 | getInputStream(); | ||
| 122 | } catch (Exception e) { | ||
| 123 | return null; | ||
| 124 | } | ||
| 125 | MessageHeader props = properties; | ||
| 126 | return props == null ? null : props.getKey(n); | ||
| 127 | } | ||
| 128 | |||
| 129 | /** | ||
| 130 | * Return the value for the nth header field. Returns null if | ||
| 131 | * there are fewer than n fields. This can be used in conjunction | ||
| 132 | * with getHeaderFieldKey to iterate through all the headers in the message. | ||
| 133 | */ | ||
| 134 | public String getHeaderField(int n) { | ||
| 135 | try { | ||
| 136 | getInputStream(); | ||
| 137 | } catch (Exception e) { | ||
| 138 | return null; | ||
| 139 | } | ||
| 140 | MessageHeader props = properties; | ||
| 141 | return props == null ? null : props.getValue(n); | ||
| 142 | } | ||
| 143 | |||
| 144 | /** Call this routine to get the content-type associated with this | ||
| 145 | * object. | ||
| 146 | */ | ||
| 147 | public String getContentType() { | ||
| 148 | if (contentType == null) | ||
| 149 | contentType = getHeaderField("content-type"); | ||
| 150 | if (contentType == null) { | ||
| 151 | String ct = null; | ||
| 152 | try { | ||
| 153 | ct = guessContentTypeFromStream(getInputStream()); | ||
| 154 | } catch(java.io.IOException e) { | ||
| 155 | } | ||
| 156 | String ce = properties.findValue("content-encoding"); | ||
| 157 | if (ct == null) { | ||
| 158 | ct = properties.findValue("content-type"); | ||
| 159 | |||
| 160 | if (ct == null) | ||
| 161 | if (url.getFile().endsWith("/")) | ||
| 162 | ct = "text/html"; | ||
| 163 | else | ||
| 164 | ct = guessContentTypeFromName(url.getFile()); | ||
| 165 | } | ||
| 166 | |||
| 167 | /* | ||
| 168 | * If the Mime header had a Content-encoding field and its value | ||
| 169 | * was not one of the values that essentially indicate no | ||
| 170 | * encoding, we force the content type to be unknown. This will | ||
| 171 | * cause a save dialog to be presented to the user. It is not | ||
| 172 | * ideal but is better than what we were previously doing, namely | ||
| 173 | * bringing up an image tool for compressed tar files. | ||
| 174 | */ | ||
| 175 | |||
| 176 | if (ct == null || ce != null && | ||
| 177 | !(ce.equalsIgnoreCase("7bit") | ||
| 178 | || ce.equalsIgnoreCase("8bit") | ||
| 179 | || ce.equalsIgnoreCase("binary"))) | ||
| 180 | ct = "content/unknown"; | ||
| 181 | setContentType(ct); | ||
| 182 | } | ||
| 183 | return contentType; | ||
| 184 | } | ||
| 185 | |||
| 186 | /** | ||
| 187 | * Set the content type of this URL to a specific value. | ||
| 188 | * @param type The content type to use. One of the | ||
| 189 | * content_* static variables in this | ||
| 190 | * class should be used. | ||
| 191 | * eg. setType(URL.content_html); | ||
| 192 | */ | ||
| 193 | public void setContentType(String type) { | ||
| 194 | contentType = type; | ||
| 195 | properties.set("content-type", type); | ||
| 196 | } | ||
| 197 | |||
| 198 | /** Call this routine to get the content-length associated with this | ||
| 199 | * object. | ||
| 200 | */ | ||
| 201 | public int getContentLength() { | ||
| 202 | try { | ||
| 203 | getInputStream(); | ||
| 204 | } catch (Exception e) { | ||
| 205 | return -1; | ||
| 206 | } | ||
| 207 | int l = contentLength; | ||
| 208 | if (l < 0) { | ||
| 209 | try { | ||
| 210 | l = Integer.parseInt(properties.findValue("content-length")); | ||
| 211 | setContentLength(l); | ||
| 212 | } catch(Exception e) { | ||
| 213 | } | ||
| 214 | } | ||
| 215 | return l; | ||
| 216 | } | ||
| 217 | |||
| 218 | /** Call this routine to set the content-length associated with this | ||
| 219 | * object. | ||
| 220 | */ | ||
| 221 | protected void setContentLength(int length) { | ||
| 222 | contentLength = length; | ||
| 223 | properties.set("content-length", String.valueOf(length)); | ||
| 224 | } | ||
| 225 | |||
| 226 | /** | ||
| 227 | * Returns true if the data associated with this URL can be cached. | ||
| 228 | */ | ||
| 229 | public boolean canCache() { | ||
| 230 | return url.getFile().indexOf('?') < 0 /* && url.postData == null | ||
| 231 | REMIND */ ; | ||
| 232 | } | ||
| 233 | |||
| 234 | /** | ||
| 235 | * Call this to close the connection and flush any remaining data. | ||
| 236 | * Overriders must remember to call super.close() | ||
| 237 | */ | ||
| 238 | public void close() { | ||
| 239 | url = null; | ||
| 240 | } | ||
| 241 | |||
| 242 | private static HashMap<String,Void> proxiedHosts = new HashMap<>(); | ||
| 243 | |||
| 244 | public synchronized static void setProxiedHost(String host) { | ||
| 245 | proxiedHosts.put(host.toLowerCase(), null); | ||
| 246 | } | ||
| 247 | |||
| 248 | public synchronized static boolean isProxiedHost(String host) { | ||
| 249 | return proxiedHosts.containsKey(host.toLowerCase()); | ||
| 250 | } | ||
| 251 | } | ||