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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 | +} | |