/*
* Copyright 2013 The Netty Project
*
* The Netty Project 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 io.netty.example.http.helloworld;
import io.netty.buffer.
Unpooled;
import io.netty.channel.
ChannelFutureListener;
import io.netty.channel.
ChannelHandlerContext;
import io.netty.channel.
SimpleChannelInboundHandler;
import io.netty.handler.codec.http.
DefaultFullHttpResponse;
import io.netty.handler.codec.http.
FullHttpResponse;
import io.netty.handler.codec.http.
HttpObject;
import io.netty.handler.codec.http.
HttpUtil;
import io.netty.handler.codec.http.
HttpRequest;
import io.netty.util.
AsciiString;
import static io.netty.handler.codec.http.
HttpResponseStatus.*;
import static io.netty.handler.codec.http.
HttpVersion.*;
public class
HttpHelloWorldServerHandler extends
SimpleChannelInboundHandler<
HttpObject> {
private static final byte[]
CONTENT = { 'H', 'e', 'l', 'l', 'o', ' ', 'W', 'o', 'r', 'l', 'd' };
private static final
AsciiString CONTENT_TYPE =
AsciiString.
cached("Content-Type");
private static final
AsciiString CONTENT_LENGTH =
AsciiString.
cached("Content-Length");
private static final
AsciiString CONNECTION =
AsciiString.
cached("Connection");
private static final
AsciiString KEEP_ALIVE =
AsciiString.
cached("keep-alive");
@
Override
public void
channelReadComplete(
ChannelHandlerContext ctx) {
ctx.
flush();
}
@
Override
public void
channelRead0(
ChannelHandlerContext ctx,
HttpObject msg) {
if (
msg instanceof
HttpRequest) {
HttpRequest req = (
HttpRequest)
msg;
boolean
keepAlive =
HttpUtil.
isKeepAlive(
req);
FullHttpResponse response = new
DefaultFullHttpResponse(
HTTP_1_1,
OK,
Unpooled.
wrappedBuffer(
CONTENT));
response.
headers().
set(
CONTENT_TYPE, "text/plain");
response.
headers().
setInt(
CONTENT_LENGTH,
response.
content().
readableBytes());
if (!
keepAlive) {
ctx.
write(
response).
addListener(
ChannelFutureListener.
CLOSE);
} else {
response.
headers().
set(
CONNECTION,
KEEP_ALIVE);
ctx.
write(
response);
}
}
}
@
Override
public void
exceptionCaught(
ChannelHandlerContext ctx,
Throwable cause) {
cause.
printStackTrace();
ctx.
close();
}
}