org.apache.catalina.ssi.SSIEcho Maven / Gradle / Ivy
/*
* 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.catalina.ssi;
import java.io.PrintWriter;
/**
* Return the result associated with the supplied Server Variable.
*
* @author Bip Thelin
* @author Paul Speed
* @author Dan Sandberg
* @author David Becker
*/
public class SSIEcho implements SSICommand {
protected static final String DEFAULT_ENCODING = "entity";
protected static final String MISSING_VARIABLE_VALUE = "(none)";
/**
* @see SSICommand
*/
@Override
public long process(SSIMediator ssiMediator, String commandName,
String[] paramNames, String[] paramValues, PrintWriter writer) {
String encoding = DEFAULT_ENCODING;
String originalValue = null;
String errorMessage = ssiMediator.getConfigErrMsg();
for (int i = 0; i < paramNames.length; i++) {
String paramName = paramNames[i];
String paramValue = paramValues[i];
if (paramName.equalsIgnoreCase("var")) {
originalValue = paramValue;
} else if (paramName.equalsIgnoreCase("encoding")) {
if (isValidEncoding(paramValue)) {
encoding = paramValue;
} else {
ssiMediator.log("#echo--Invalid encoding: " + paramValue);
writer.write(errorMessage);
}
} else {
ssiMediator.log("#echo--Invalid attribute: " + paramName);
writer.write(errorMessage);
}
}
String variableValue = ssiMediator.getVariableValue(
originalValue, encoding);
if (variableValue == null) {
variableValue = MISSING_VARIABLE_VALUE;
}
writer.write(variableValue);
return System.currentTimeMillis();
}
protected boolean isValidEncoding(String encoding) {
return encoding.equalsIgnoreCase("url")
|| encoding.equalsIgnoreCase("entity")
|| encoding.equalsIgnoreCase("none");
}
}