org.apache.catalina.ssi.SSIExec 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.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import org.apache.catalina.util.IOTools;
/**
* Implements the Server-side #exec command
*
* @author Bip Thelin
* @author Amy Roh
* @author Paul Speed
* @author Dan Sandberg
* @author David Becker
*/
public class SSIExec implements SSICommand {
protected final SSIInclude ssiInclude = new SSIInclude();
protected static final int BUFFER_SIZE = 1024;
/**
* @see SSICommand
*/
@Override
public long process(SSIMediator ssiMediator, String commandName,
String[] paramNames, String[] paramValues, PrintWriter writer) {
long lastModified = 0;
String configErrMsg = ssiMediator.getConfigErrMsg();
String paramName = paramNames[0];
String paramValue = paramValues[0];
String substitutedValue = ssiMediator.substituteVariables(paramValue);
if (paramName.equalsIgnoreCase("cgi")) {
lastModified = ssiInclude.process(ssiMediator, "include",
new String[]{"virtual"}, new String[]{substitutedValue},
writer);
} else if (paramName.equalsIgnoreCase("cmd")) {
boolean foundProgram = false;
try {
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec(substitutedValue);
foundProgram = true;
char[] buf = new char[BUFFER_SIZE];
try (BufferedReader stdOutReader = new BufferedReader(new InputStreamReader(proc.getInputStream()));
BufferedReader stdErrReader = new BufferedReader(new InputStreamReader(proc.getErrorStream()));) {
IOTools.flow(stdErrReader, writer, buf);
IOTools.flow(stdOutReader, writer, buf);
}
proc.waitFor();
lastModified = System.currentTimeMillis();
} catch (InterruptedException e) {
ssiMediator.log("Couldn't exec file: " + substitutedValue, e);
writer.write(configErrMsg);
} catch (IOException e) {
if (!foundProgram) {
//apache doesn't output an error message if it can't find
// a program
}
ssiMediator.log("Couldn't exec file: " + substitutedValue, e);
}
}
return lastModified;
}
}