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package org.eclipse.stem.ui.ge.servlet;
/*******************************************************************************
* Copyright (c) 2006 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.stem.ui.Activator;
/**
* Servlet that allows the client to verify that the
* web server is started and the STEM-GoogleEarth servlets
* are deployed.
*
* If it gets a String "VerifyClient v.v.v"
* It returns a String "VerifyServlet v.v.v"
*
*/
public class VerifyServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* String that we will send the client
*/
private static String outputText="VerifyServlet "+
Version.version;
/**
* String that client should send us.
*/
private static String expectedText="VerifyClient "+
Version.version;
/**
*
* @see javax.servlet.http.HttpServlet#service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
protected void service(HttpServletRequest request,HttpServletResponse response)
throws ServletException, IOException {
DataInputStream in =
new DataInputStream(request.getInputStream());
response.setContentType("application/octer-stream");
// use ByteArray output
ByteArrayOutputStream byteOutput = new ByteArrayOutputStream();
DataOutputStream output =
new DataOutputStream(byteOutput);
//
// read the input from the client
//
String stringValue = in.readUTF();
if (stringValue.startsWith(expectedText)) {
output.writeUTF(outputText);
if (stringValue.contains("DEBUG")) {
SlideShowServlet.DEBUG = true;
}
} else {
String errmsg = "Error: "+
"Expected: "+expectedText+
" Received: "+stringValue;
debug(errmsg);
output.writeUTF(errmsg);
}
output.flush();
byte[] buf = byteOutput.toByteArray();
response.setContentLength(buf.length);
ServletOutputStream servletOutput = response.getOutputStream();
servletOutput.write(buf);
servletOutput.close();
}
@SuppressWarnings("unused")
private void errHtml(HttpServletResponse response, String msg)
throws IOException {
response.setContentType("text/html");
PrintWriter out = new PrintWriter(response.getOutputStream());
out.println("<html>");
out.println("<head><title>VerifyServlet Error</title></head>");
out.println("<body>");
out.println("<p>" + msg + "</p>");
out.println("</body></html>");
out.flush();
}
/**
* print debug messages to the server log.
* @param msg
*/
private static void debug(String msg) {
if (SlideShowServlet.DEBUG) {
Activator.logInformation("VerifyServlet: "+msg);
}
}
@SuppressWarnings("unused")
private static void debug(String msg,Throwable e) {
//log(msg,e);
Activator.logInformation(msg);
e.printStackTrace();
}
}
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