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1   /*
2    * Copyright 2013 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License, version
5    * 2.0 (the "License"); you may not use this file except in compliance with the
6    * License. You may obtain a copy of the License at:
7    *
8    * http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations under
14   * the License.
15   */
16  package io.netty.example.http.cors;
17  
18  import io.netty.buffer.Unpooled;
19  import io.netty.channel.ChannelFutureListener;
20  import io.netty.channel.ChannelHandlerContext;
21  import io.netty.channel.SimpleChannelInboundHandler;
22  import io.netty.handler.codec.http.DefaultFullHttpResponse;
23  import io.netty.handler.codec.http.FullHttpResponse;
24  import io.netty.handler.codec.http.HttpResponseStatus;
25  import io.netty.handler.codec.http.HttpVersion;
26  
27  /**
28   * A simple handler which will simple return a successful Http
29   * response for any request.
30   */
31  public class OkResponseHandler extends SimpleChannelInboundHandler<Object> {
32      @Override
33      public void channelRead0(ChannelHandlerContext ctx, Object msg) {
34          final FullHttpResponse response = new DefaultFullHttpResponse(
35                  HttpVersion.HTTP_1_1, HttpResponseStatus.OK, Unpooled.EMPTY_BUFFER);
36          response.headers().set("custom-response-header", "Some value");
37          ctx.writeAndFlush(response).addListener(ChannelFutureListener.CLOSE);
38      }
39  }