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/*******************************************************************************
* Copyright (c) 2011, Wind River 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:
* Wind River - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.p2.testserver.servlets;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringReader;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Locale;
import java.util.Map;
import java.util.TimeZone;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.equinox.p2.testserver.HttpConstants;
public class Stats extends HttpServlet {
/**
*
*/
private static final long serialVersionUID = -3209768955270841029L;
private static final String UnkownPackage = "unkown"; //$NON-NLS-1$
private static final String PACKAGE = "package"; //$NON-NLS-1$
private Map downloadStats = new HashMap();
public Stats() {
downloadStats.put(UnkownPackage, new Integer(0));
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
responseHeaderAndStatus(response);
final String result = getStatsResult();
response.setContentLength(result.length());
response.setContentType("text/plain"); //$NON-NLS-1$
BufferedReader reader = new BufferedReader(new StringReader(result));
PrintWriter writer = response.getWriter();
try {
writer.flush(); /* write the headers and unbuffer the output */
char buffer[] = new char[4096];
int read;
while ((read = reader.read(buffer, 0, buffer.length)) != -1) {
writer.write(buffer, 0, read);
}
} finally {
reader.close();
writer.close();
}
}
private void responseHeaderAndStatus(HttpServletResponse response) {
// set when the resource was modified
DateFormat df = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US); //$NON-NLS-1$
// must always be GMT
df.setTimeZone(TimeZone.getTimeZone("GMT")); //$NON-NLS-1$
response.setHeader(HttpConstants.LAST_MODIFIED, df.format(new Date()));
response.setStatus(HttpServletResponse.SC_OK);
}
private String getStatsResult() {
StringBuffer sb = new StringBuffer();
sb.append("It's a page to count the downloading times when heading this page with query 'package=<package name>'.\n"); //$NON-NLS-1$
for (Iterator iter = downloadStats.keySet().iterator(); iter.hasNext();) {
String packageName = (String) iter.next();
sb.append(packageName).append(" download number: ").append(downloadStats.get(packageName)).append("\n"); //$NON-NLS-1$//$NON-NLS-2$
}
return sb.toString();
}
protected void doHead(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String queryString = request.getQueryString();
responseHeaderAndStatus(response);
boolean found = false;
if (queryString != null) {
String[] parameters = queryString.split("&"); //$NON-NLS-1$
for (int i = 0; i < parameters.length; i++) {
String[] paraPair = parameters[i].split("=", 2); //$NON-NLS-1$
if (paraPair.length == 2 && PACKAGE.equals(paraPair[0])) {
found = true;
Integer count = (Integer) downloadStats.get(paraPair[1]);
if (count == null) {
count = new Integer(1);
} else
count = new Integer(1 + count.intValue());
downloadStats.put(paraPair[1], count);
break;
}
}
}
if (!found) {
Integer count = (Integer) downloadStats.get(UnkownPackage);
downloadStats.put(UnkownPackage, new Integer(1 + count.intValue()));
}
}
}
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