/**
* 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.hadoop.gateway.filter.rewrite.impl.html;
import org.apache.hadoop.gateway.filter.rewrite.api.UrlRewriteFilterContentDescriptor;
import org.apache.hadoop.gateway.filter.rewrite.api.UrlRewriter;
import org.apache.hadoop.gateway.filter.rewrite.i18n.UrlRewriteMessages;
import org.apache.hadoop.gateway.i18n.messages.MessagesFactory;
import org.apache.hadoop.gateway.util.urltemplate.Parser;
import org.apache.hadoop.gateway.util.urltemplate.Resolver;
import org.apache.hadoop.gateway.util.urltemplate.Template;
import javax.xml.parsers.ParserConfigurationException;
import java.io.IOException;
import java.io.Reader;
import java.net.URISyntaxException;
public class HtmlUrlRewriteFilterReader extends HtmlFilterReader {
private static final UrlRewriteMessages LOG = MessagesFactory.get( UrlRewriteMessages.class );
private Resolver resolver;
private UrlRewriter rewriter;
private UrlRewriter.Direction direction;
public HtmlUrlRewriteFilterReader( Reader reader, UrlRewriter rewriter, Resolver resolver, UrlRewriter.Direction direction, UrlRewriteFilterContentDescriptor config )
throws IOException, ParserConfigurationException {
super( reader );
this.resolver = resolver;
this.rewriter = rewriter;
this.direction = direction;
}
//TODO: Need to limit which values are attempted to be filtered by the name.
protected String filterValueString( String name, String value, String rule ) {
try {
Template input = Parser.parse( value );
Template output = rewriter.rewrite( resolver, input, direction, rule );
if( output != null ) {
value = output.getPattern();
}
} catch( URISyntaxException e ) {
LOG.failedToParseValueForUrlRewrite( value );
}
return value;
}
@Override
protected String filterAttribute( String tagName, String attributeName, String attributeValue, String ruleName ) {
return filterValueString( attributeName, attributeValue, ruleName );
}
@Override
protected String filterText( String tagName, String text, String ruleName ) {
return filterValueString( tagName, text, ruleName );
}
}