/*
* 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 java.util.StringTokenizer;
import org.apache.catalina.util.IOTools;
import org.apache.tomcat.util.res.StringManager;
/**
* Implements the Server-side #exec command.
*/
public class SSIExec implements SSICommand {
private static final StringManager sm = StringManager.getManager(SSIExec.class);
protected final SSIInclude ssiInclude = new SSIInclude();
protected static final int BUFFER_SIZE = 1024;
@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();
StringTokenizer st = new StringTokenizer(substitutedValue);
String[] cmdArray = new String[st.countTokens()];
for (int i = 0; i < cmdArray.length; i++) {
cmdArray[i] = st.nextToken();
}
Process proc = rt.exec(cmdArray);
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(sm.getString("ssiExec.executeFailed", substitutedValue), e);
writer.write(configErrMsg);
} catch (IOException ioe) {
if (!foundProgram) {
// Apache doesn't output an error message if it can't find
// a program
}
ssiMediator.log(sm.getString("ssiExec.executeFailed", substitutedValue), ioe);
}
}
return lastModified;
}
}