com.couchbase.client.deps.io.netty.example.http.cors.HttpCorsServerInitializer Maven / Gradle / Ivy
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The official Couchbase JVM Core IO Library
/*
* Copyright 2012 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 com.couchbase.client.deps.io.netty.example.http.cors;
import com.couchbase.client.deps.io.netty.channel.ChannelInitializer;
import com.couchbase.client.deps.io.netty.channel.ChannelPipeline;
import com.couchbase.client.deps.io.netty.channel.socket.SocketChannel;
import com.couchbase.client.deps.io.netty.handler.codec.http.HttpObjectAggregator;
import com.couchbase.client.deps.io.netty.handler.codec.http.HttpRequestDecoder;
import com.couchbase.client.deps.io.netty.handler.codec.http.HttpResponseEncoder;
import com.couchbase.client.deps.io.netty.handler.codec.http.cors.CorsConfig;
import com.couchbase.client.deps.io.netty.handler.codec.http.cors.CorsHandler;
import com.couchbase.client.deps.io.netty.handler.ssl.SslContext;
import com.couchbase.client.deps.io.netty.handler.stream.ChunkedWriteHandler;
/**
* Please refer to the {@link CorsConfig} javadocs for information about all the
* configuration options available.
*
* Below are some of configuration discussed in this example:
* Support only a specific origin
* To support a single origin instead of the wildcard use the following:
*
* CorsConfig corsConfig = CorsConfig.withOrigin("http://domain1.com")
*
*
* Enable loading from the file system
* To enable the server to handle an origin specified as 'null', which happens
* when a web browser loads a file from the local file system use the following:
*
* corsConfig.isNullOriginAllowed()
*
*
* Enable request headers
* To enable additional request headers:
*
* corsConfig.allowedRequestHeaders("custom-request-header")
*
*
* Expose response headers
* By default a browser only exposes the following simple header:
*
* - Cache-Control
* - Content-Language
* - Content-Type
* - Expires
* - Last-Modified
* - Pragma
*
* Any of the above response headers can be retreived by:
*
* xhr.getResponseHeader("Content-Type");
*
* If you need to get access to other headers this must be enabled by the server, for example:
*
* corsConfig.exposedHeaders("custom-response-header");
*
*/
public class HttpCorsServerInitializer extends ChannelInitializer {
private final SslContext sslCtx;
public HttpCorsServerInitializer(SslContext sslCtx) {
this.sslCtx = sslCtx;
}
@Override
public void initChannel(SocketChannel ch) {
CorsConfig corsConfig = CorsConfig.withAnyOrigin().build();
ChannelPipeline pipeline = ch.pipeline();
if (sslCtx != null) {
pipeline.addLast(sslCtx.newHandler(ch.alloc()));
}
pipeline.addLast(new HttpResponseEncoder());
pipeline.addLast(new HttpRequestDecoder());
pipeline.addLast(new HttpObjectAggregator(65536));
pipeline.addLast(new ChunkedWriteHandler());
pipeline.addLast(new CorsHandler(corsConfig));
pipeline.addLast(new OkResponseHandler());
}
}