io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including
all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and
Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* 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 io.netty.handler.codec.http.websocketx;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandler;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelPipeline;
import io.netty.handler.codec.http.DefaultFullHttpResponse;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpResponseStatus;
import io.netty.util.AttributeKey;
import java.util.List;
import static io.netty.handler.codec.http.HttpVersion.*;
/**
* This handler does all the heavy lifting for you to run a websocket server.
*
* It takes care of websocket handshaking as well as processing of control frames (Close, Ping, Pong). Text and Binary
* data frames are passed to the next handler in the pipeline (implemented by you) for processing.
*
* See io.netty.example.http.websocketx.html5.WebSocketServer for usage.
*
* The implementation of this handler assumes that you just want to run a websocket server and not process other types
* HTTP requests (like GET and POST). If you wish to support both HTTP requests and websockets in the one server, refer
* to the io.netty.example.http.websocketx.server.WebSocketServer example.
*
* To know once a handshake was done you can intercept the
* {@link ChannelInboundHandler#userEventTriggered(ChannelHandlerContext, Object)} and check if the event was of type
* {@link ServerHandshakeStateEvent#HANDSHAKE_COMPLETE}.
*/
public class WebSocketServerProtocolHandler extends WebSocketProtocolHandler {
/**
* Events that are fired to notify about handshake status
*/
public enum ServerHandshakeStateEvent {
/**
* The Handshake was complete succesful and so the channel was upgraded to websockets
*/
HANDSHAKE_COMPLETE
}
private static final AttributeKey HANDSHAKER_ATTR_KEY =
AttributeKey.valueOf(WebSocketServerHandshaker.class.getName() + ".HANDSHAKER");
private final String websocketPath;
private final String subprotocols;
private final boolean allowExtensions;
private final int maxFramePayloadLength;
public WebSocketServerProtocolHandler(String websocketPath) {
this(websocketPath, null, false);
}
public WebSocketServerProtocolHandler(String websocketPath, String subprotocols) {
this(websocketPath, subprotocols, false);
}
public WebSocketServerProtocolHandler(String websocketPath, String subprotocols, boolean allowExtensions) {
this(websocketPath, subprotocols, allowExtensions, 65536);
}
public WebSocketServerProtocolHandler(String websocketPath, String subprotocols,
boolean allowExtensions, int maxFrameSize) {
this.websocketPath = websocketPath;
this.subprotocols = subprotocols;
this.allowExtensions = allowExtensions;
maxFramePayloadLength = maxFrameSize;
}
@Override
public void handlerAdded(ChannelHandlerContext ctx) {
ChannelPipeline cp = ctx.pipeline();
if (cp.get(WebSocketServerProtocolHandshakeHandler.class) == null) {
// Add the WebSocketHandshakeHandler before this one.
ctx.pipeline().addBefore(ctx.name(), WebSocketServerProtocolHandshakeHandler.class.getName(),
new WebSocketServerProtocolHandshakeHandler(websocketPath, subprotocols,
allowExtensions, maxFramePayloadLength));
}
}
@Override
protected void decode(ChannelHandlerContext ctx, WebSocketFrame frame, List
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