| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1996-1998 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | /*- |
| 27 | * netdoc urls point either into the local filesystem or externally |
| 28 | * through an http url, with network documents being preferred. Useful for |
| 29 | * FAQs & other documents which are likely to be changing over time at the |
| 30 | * central site, and where the user will want the most recent edition. |
| 31 | * |
| 32 | * @author Steven B. Byrne |
| 33 | */ |
| 34 | |
| 35 | package sun.net.www.protocol.netdoc; |
| 36 | |
| 37 | import java.net.URL; |
| 38 | import java.net.URLConnection; |
| 39 | import java.net.MalformedURLException; |
| 40 | import java.net.URLStreamHandler; |
| 41 | import java.io.InputStream; |
| 42 | import java.io.IOException; |
| 43 | |
| 44 | public class Handler extends URLStreamHandler { |
| 45 | static URL base; |
| 46 | |
| 47 | /* |
| 48 | * Attempt to find a load the given url using the default (network) |
| 49 | * documentation location. If that fails, use the local copy |
| 50 | */ |
| 51 | public synchronized URLConnection openConnection(URL u) |
| 52 | throws IOException |
| 53 | { |
| 54 | URLConnection uc = null; |
| 55 | URL ru; |
| 56 | |
| 57 | Boolean tmp = java.security.AccessController.doPrivileged( |
| 58 | new sun.security.action.GetBooleanAction("newdoc.localonly")); |
| 59 | boolean localonly = tmp.booleanValue(); |
| 60 | |
| 61 | String docurl = java.security.AccessController.doPrivileged( |
| 62 | new sun.security.action.GetPropertyAction("doc.url")); |
| 63 | |
| 64 | String file = u.getFile(); |
| 65 | if (!localonly) { |
| 66 | try { |
| 67 | if (base == null) { |
| 68 | base = new URL(docurl); |
| 69 | } |
| 70 | ru = new URL(base, file); |
| 71 | } catch (MalformedURLException e) { |
| 72 | ru = null; |
| 73 | } |
| 74 | if (ru != null) { |
| 75 | uc = ru.openConnection(); |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | if (uc == null) { |
| 80 | try { |
| 81 | ru = new URL("file", "~", file); |
| 82 | |
| 83 | uc = ru.openConnection(); |
| 84 | InputStream is = uc.getInputStream(); // Check for success. |
| 85 | } catch (MalformedURLException e) { |
| 86 | uc = null; |
| 87 | } catch (IOException e) { |
| 88 | uc = null; |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | if (uc == null) { |
| 93 | throw new IOException("Can't find file for URL: " |
| 94 | +u.toExternalForm()); |
| 95 | } |
| 96 | return uc; |
| 97 | } |
| 98 | } |