| /* |
| * 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"); |
| } |
| } |