| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.cocoon.components.source; |
| |
| |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import org.apache.avalon.framework.parameters.Parameters; |
| import org.apache.cocoon.ProcessingException; |
| import org.apache.cocoon.xml.XMLConsumer; |
| import org.xml.sax.ext.LexicalHandler; |
| import org.xml.sax.Attributes; |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.Locator; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.helpers.AttributesImpl; |
| |
| |
| /** |
| * This is an <code>XMLConsumer</code> which rewrites the stream |
| * according to the configuration. |
| * The configuration can have the following parameters: |
| * "rewriteURLMode" : The mode to rewrite the urls. Currently none and cocoon |
| * are supported. |
| * "cocoonURL" : The url all links are resolved to |
| * "urlParameterName" : The parameter name to use for links (all links are |
| * then "cocoonURL?urlParameterName=LINK" |
| * "baseURL" : The current URL to rewrite |
| * |
| * @author <a href="mailto:cziegeler@s-und-n.de">Carsten Ziegeler</a> |
| * @version CVS $Id$ |
| */ |
| public final class URLRewriter implements XMLConsumer { |
| |
| public static final String PARAMETER_MODE = "rewriteURLMode"; |
| public static final String MODE_NONE = "none"; |
| public static final String MODE_COCOON = "cocoon"; |
| public static final String PARAMETER_PARAMETER_NAME = "urlParameterName"; |
| public static final String PARAMETER_URL = "baseURL"; |
| public static final String PARAMETER_COCOON_URL = "cocoonURL"; |
| |
| /** The <code>ContentHandler</code> */ |
| private ContentHandler contentHandler; |
| /** The <code>LexicalHandler</code> */ |
| private LexicalHandler lexicalHandler; |
| /** The mode: |
| * 0 : no rewriting |
| * 1 : cocoon */ |
| private int mode; |
| /** The base url */ |
| private String baseUrl; |
| /** The cocoon url */ |
| private String cocoonUrl; |
| |
| /** |
| * Create a new rewriter |
| */ |
| public URLRewriter(Parameters configuration, |
| ContentHandler contentHandler, |
| LexicalHandler lexicalHandler) |
| throws ProcessingException { |
| try { |
| this.contentHandler = contentHandler; |
| this.lexicalHandler = lexicalHandler; |
| this.mode = 0; |
| if (configuration != null |
| && configuration.getParameter(PARAMETER_MODE, null) != null) { |
| if (configuration.getParameter(PARAMETER_MODE, null).equalsIgnoreCase(MODE_COCOON) == true) { |
| this.mode = 1; |
| this.baseUrl = configuration.getParameter(PARAMETER_URL); |
| this.cocoonUrl = configuration.getParameter(PARAMETER_COCOON_URL) + |
| '?' + configuration.getParameter(PARAMETER_PARAMETER_NAME) + '='; |
| } |
| } |
| } catch (org.apache.avalon.framework.parameters.ParameterException local) { |
| throw new ProcessingException("URLRewriter: configuration exception.", local); |
| } |
| } |
| |
| /** |
| * Create a new rewriter |
| */ |
| public URLRewriter(Parameters configuration, |
| ContentHandler contentHandler) |
| throws ProcessingException { |
| this(configuration, contentHandler, |
| (contentHandler instanceof LexicalHandler ? (LexicalHandler)contentHandler : null)); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void setDocumentLocator(Locator locator) { |
| contentHandler.setDocumentLocator(locator); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void startDocument() |
| throws SAXException { |
| contentHandler.startDocument(); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void endDocument() |
| throws SAXException { |
| contentHandler.endDocument(); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void startPrefixMapping(String prefix, String uri) |
| throws SAXException { |
| contentHandler.startPrefixMapping(prefix,uri); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void endPrefixMapping(String prefix) |
| throws SAXException { |
| contentHandler.endPrefixMapping(prefix); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void startElement(String namespace, String name, String raw, |
| Attributes attr) |
| throws SAXException { |
| if (this.mode == 1) { |
| String attrname; |
| AttributesImpl newattr = null; |
| String value; |
| |
| for(int i = 0; i < attr.getLength(); i++) { |
| attrname = attr.getLocalName(i); |
| if (attrname.equals("href") == true |
| || attrname.equals("action") == true) { |
| if (newattr == null) { |
| newattr = new AttributesImpl(attr); |
| } |
| value = attr.getValue(i); |
| if (value.indexOf(':') == -1) { |
| try { |
| URL baseURL = new URL(new URL(this.baseUrl), value); |
| value = baseURL.toExternalForm(); |
| } catch (MalformedURLException local) { |
| value = attr.getValue(i); |
| } |
| } |
| newattr.setValue(i, this.cocoonUrl + value); |
| } else if (attrname.equals("src") == true |
| || attrname.equals("background") == true) { |
| if (newattr == null) { |
| newattr = new AttributesImpl(attr); |
| } |
| value = attr.getValue(i); |
| if (value.indexOf(':') == -1) { |
| try { |
| URL baseURL = new URL(new URL(this.baseUrl), value); |
| value = baseURL.toExternalForm(); |
| } catch (MalformedURLException local) { |
| value = attr.getValue(i); |
| } |
| } |
| newattr.setValue(i, value); |
| } |
| } |
| if (newattr != null) { |
| contentHandler.startElement(namespace, name, raw, newattr); |
| return; |
| } |
| } |
| contentHandler.startElement(namespace,name,raw,attr); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void endElement(String namespace, String name, String raw) |
| throws SAXException { |
| contentHandler.endElement(namespace,name,raw); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void characters(char ary[], int start, int length) |
| throws SAXException { |
| contentHandler.characters(ary,start,length); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void ignorableWhitespace(char ary[], int start, int length) |
| throws SAXException { |
| contentHandler.ignorableWhitespace(ary,start,length); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void processingInstruction(String target, String data) |
| throws SAXException { |
| contentHandler.processingInstruction(target,data); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void skippedEntity(String name) |
| throws SAXException { |
| contentHandler.skippedEntity(name); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void startDTD(String name, String public_id, String system_id) |
| throws SAXException { |
| if (lexicalHandler != null) lexicalHandler.startDTD(name,public_id,system_id); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void endDTD() throws SAXException { |
| if (lexicalHandler != null) lexicalHandler.endDTD(); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void startEntity(String name) throws SAXException { |
| if (lexicalHandler != null) lexicalHandler.startEntity(name); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void endEntity(String name) throws SAXException { |
| if (lexicalHandler != null) lexicalHandler.endEntity(name); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void startCDATA() throws SAXException { |
| if (lexicalHandler != null) lexicalHandler.startCDATA(); |
| } |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void endCDATA() throws SAXException { |
| if (lexicalHandler != null) lexicalHandler.endCDATA(); |
| } |
| |
| |
| /** |
| * SAX Event Handling |
| */ |
| public void comment(char ary[], int start, int length) |
| throws SAXException { |
| if (this.lexicalHandler != null) { |
| lexicalHandler.comment(ary,start,length); |
| } |
| } |
| |
| } |
