/*
* Copyright 2009 Red Hat, Inc.
*
* Red Hat 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.jboss.netty.example.bayeux.chat;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.ChannelFuture;
import org.jboss.netty.channel.ChannelFutureListener;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.channel.ChannelPipelineCoverage;
import org.jboss.netty.channel.ExceptionEvent;
import org.jboss.netty.channel.MessageEvent;
import org.jboss.netty.channel.SimpleChannelUpstreamHandler;
import org.jboss.netty.handler.codec.bayeux.BayeuxConnection;
import org.jboss.netty.handler.codec.http.Cookie;
import org.jboss.netty.handler.codec.http.CookieDecoder;
import org.jboss.netty.handler.codec.http.CookieEncoder;
import org.jboss.netty.handler.codec.http.DefaultHttpResponse;
import org.jboss.netty.handler.codec.http.HttpChunk;
import org.jboss.netty.handler.codec.http.HttpHeaders;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.jboss.netty.handler.codec.http.HttpResponse;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import org.jboss.netty.handler.codec.http.HttpVersion;
import org.jboss.netty.handler.codec.http.QueryStringDecoder;
import org.jboss.netty.logging.InternalLogger;
import org.jboss.netty.logging.InternalLoggerFactory;
/**
*
* @author daijun
*/
@ChannelPipelineCoverage("one")
public class BayeuxHandler extends SimpleChannelUpstreamHandler {
private volatile HttpRequest request;
private volatile boolean readingChunks;
private final StringBuilder responseContent = new StringBuilder();
private static final InternalLogger logger =
InternalLoggerFactory.getInstance(BayeuxHandler.class.getName());
private String root;
public BayeuxHandler() {
}
public BayeuxHandler(String root) {
this.root = root;
}
@Override
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
if (e.getMessage() instanceof BayeuxConnection) {
ctx.getChannel().write(e.getMessage());
} else if (!readingChunks && e.getMessage() instanceof HttpRequest) {
request = (HttpRequest) e.getMessage();
File file = new File(root + File.separator + request.getUri());
if (file.exists() && file.isFile()) {
FileReader reader = new FileReader(file);
BufferedReader bufread = new BufferedReader(reader);
String read;
while ((read = bufread.readLine()) != null) {
responseContent.append(read + "\r\n");
}
bufread.close();
writeResponse(e);
} else {
responseContent.append("WELCOME TO THE WILD WILD WEB SERVER<br/>");
responseContent.append("===================================<br/>");
responseContent.append("VERSION: " + request.getProtocolVersion().getText() + "<br/>");
if (request.containsHeader(HttpHeaders.Names.HOST)) {
responseContent.append("HOSTNAME: " + request.getHeader(HttpHeaders.Names.HOST) + "<br/>");
}
responseContent.append("REQUEST_URI: " + request.getUri() + "<br/><br/>");
if (!request.getHeaderNames().isEmpty()) {
for (String name : request.getHeaderNames()) {
for (String value : request.getHeaders(name)) {
responseContent.append("HEADER: " + name + " = " + value + "<br/>");
}
}
responseContent.append("<br/>");
}
QueryStringDecoder queryStringDecoder = new QueryStringDecoder(request.getUri());
Map<String, List<String>> params = queryStringDecoder.getParameters();
if (!params.isEmpty()) {
for (Entry<String, List<String>> p : params.entrySet()) {
String key = p.getKey();
List<String> vals = p.getValue();
for (String val : vals) {
responseContent.append("PARAM: " + key + " = " + val + "<br/>");
}
}
responseContent.append("<br/>");
}
if (request.isChunked()) {
readingChunks = true;
} else {
ChannelBuffer content = request.getContent();
if (content.readable()) {
responseContent.append("CONTENT: " + content.toString("UTF-8") + "<br/>");
}
writeResponse(e);
}
}
} else {
HttpChunk chunk = (HttpChunk) e.getMessage();
if (chunk.isLast()) {
readingChunks = false;
responseContent.append("END OF CONTENT<\r\n>");
writeResponse(e);
} else {
responseContent.append("CHUNK: " + chunk.getContent().toString("UTF-8") + "\r\n");
}
}
}
private void writeResponse(MessageEvent e) {
// Convert the response content to a ChannelBuffer.
ChannelBuffer buf = ChannelBuffers.copiedBuffer(responseContent.toString(), "UTF-8");
responseContent.setLength(0);
// Decide whether to close the connection or not.
boolean close =
HttpHeaders.Values.CLOSE.equalsIgnoreCase(request.getHeader(HttpHeaders.Names.CONNECTION)) ||
request.getProtocolVersion().equals(HttpVersion.HTTP_1_0) &&
!HttpHeaders.Values.KEEP_ALIVE.equalsIgnoreCase(request.getHeader(HttpHeaders.Names.CONNECTION));
// Build the response object.
HttpResponse response = new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
response.setContent(buf);
response.setHeader(HttpHeaders.Names.CONTENT_TYPE, "text/html; charset=UTF-8");
if (!close) {
// There's no need to add 'Content-Length' header
// if this is the last response.
response.setHeader(HttpHeaders.Names.CONTENT_LENGTH, String.valueOf(buf.readableBytes()));
}
String cookieString = request.getHeader(HttpHeaders.Names.COOKIE);
if (cookieString != null) {
CookieDecoder cookieDecoder = new CookieDecoder();
Set<Cookie> cookies = cookieDecoder.decode(cookieString);
if (!cookies.isEmpty()) {
// Reset the cookies if necessary.
CookieEncoder cookieEncoder = new CookieEncoder(true);
for (Cookie cookie : cookies) {
cookieEncoder.addCookie(cookie);
}
response.addHeader(HttpHeaders.Names.SET_COOKIE, cookieEncoder.encode());
}
}
// Write the response.
ChannelFuture future = e.getChannel().write(response);
// Close the connection after the write operation is done if necessary.
if (close) {
future.addListener(ChannelFutureListener.CLOSE);
}
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e)
throws Exception {
e.getCause().printStackTrace();
e.getChannel().close();
}
}