/*
* 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;
import org.apache.tomcat.util.res.StringManager;
/**
* Return the result associated with the supplied Server Variable.
*/
public class SSIEcho implements SSICommand {
private static final StringManager sm = StringManager.getManager(SSIEcho.class);
protected static final String DEFAULT_ENCODING = SSIMediator.ENCODING_ENTITY;
protected static final String MISSING_VARIABLE_VALUE = "(none)";
@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(sm.getString("ssiEcho.invalidEncoding", paramValue));
writer.write(ssiMediator.encode(errorMessage, SSIMediator.ENCODING_ENTITY));
}
} else {
ssiMediator.log(sm.getString("ssiCommand.invalidAttribute", paramName));
writer.write(ssiMediator.encode(errorMessage, SSIMediator.ENCODING_ENTITY));
}
}
String variableValue = (originalValue == null) ? MISSING_VARIABLE_VALUE :
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(SSIMediator.ENCODING_URL) ||
encoding.equalsIgnoreCase(SSIMediator.ENCODING_ENTITY) ||
encoding.equalsIgnoreCase(SSIMediator.ENCODING_NONE);
}
}