| /* |
| * Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| |
| /** |
| * Plain text file handler |
| * |
| * This class provides an example of a a replacement content handler for |
| * the text/plain content type. It reads the content of the URL, and prepends |
| * an additional message at the beginning. |
| * |
| * Note that the only restrictions on the package/class names are: |
| * 1) the package must end in the major type of the content type (such as |
| * text, image, application, etc). |
| * 2) the class name must be named with the subtype of the content type (for |
| * content type "text/plain", this would be "plain" as in this example; for |
| * content type "image/gif", the class name would be "gif", and the package |
| * name must end with ".image". |
| * 3) the class must be a subclass of ContentHandler. |
| * 4) It must define the getContent function. |
| */ |
| package COM.foo.content.text; |
| |
| import java.net.ContentHandler; |
| import java.io.InputStream; |
| import java.net.URLConnection; |
| import java.io.IOException; |
| |
| public class plain extends ContentHandler { |
| /** |
| * Returns one of several object types (this set may change in future |
| * versions): |
| * 1) instance of Thread: |
| * Invoke the thread to launch an external viewer. |
| * 2) instance of InputStream: |
| * Bring up the "Save to disk" dialog page to allow the content |
| * to be saved to disk. |
| * 3) instance of InputStreamImageSource: |
| * Load the image into HotJava in an image viewer page. |
| * 4) instance of String: |
| * Go to a new page with the string as the plain text content |
| * of that page. |
| */ |
| public Object getContent(URLConnection uc) { |
| try { |
| InputStream is = uc.getInputStream(); |
| StringBuffer sb = new StringBuffer(); |
| int c; |
| |
| sb.append("[Content of " + uc.getURL() + "]\n\n"); |
| sb.append("[This opening message brought to you by your plain/text\n"); |
| sb.append("content handler. To remove this content handler, delete the\n"); |
| sb.append("COM.foo.content.text directory from your class path and\n"); |
| sb.append("the java.content.handler.pkgs property from your HotJava\n"); |
| sb.append("properties file.]\n"); |
| sb.append("----------------------------------------------------------------\n\n"); |
| |
| // Read the characters from the source, accumulate them into the string buffer. |
| // (Not the most efficient, but simplest for this example.) |
| while ((c = is.read()) >= 0) { |
| sb.append((char)c); |
| } |
| |
| // Tidy up |
| is.close(); |
| |
| // Return the resulting string to our client (we're case 4 above) |
| return sb.toString(); |
| } catch (IOException e) { |
| // For any exception, just return an indication of what went wrong. |
| return "Problem reading document: " + uc.getURL(); |
| } |
| } |
| } |