238e03f75b
* This is done because we noticed that the previous change limit the usage more then it gave us any benefit. Now it is possible again to rewrite the url on the fly or reuse the objects when writing a proxy and so limit the GC pressure. * Fixes also #979
98 lines
4.1 KiB
Java
98 lines
4.1 KiB
Java
/*
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* Copyright 2012 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.handler.codec.http.websocketx;
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import io.netty.channel.ChannelFuture;
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import io.netty.channel.ChannelFutureListener;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelInboundMessageHandlerAdapter;
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import io.netty.channel.ChannelPipeline;
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import io.netty.handler.codec.http.DefaultFullHttpResponse;
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import io.netty.handler.codec.http.FullHttpRequest;
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import io.netty.handler.codec.http.HttpHeaders;
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import io.netty.handler.codec.http.HttpRequest;
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import io.netty.handler.codec.http.HttpResponse;
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import io.netty.handler.ssl.SslHandler;
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import static io.netty.handler.codec.http.HttpHeaders.*;
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import static io.netty.handler.codec.http.HttpMethod.*;
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import static io.netty.handler.codec.http.HttpResponseStatus.*;
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import static io.netty.handler.codec.http.HttpVersion.*;
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/**
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* Handles the HTTP handshake (the HTTP Upgrade request) for {@link WebSocketServerProtocolHandler}.
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*/
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public class WebSocketServerProtocolHandshakeHandler
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extends ChannelInboundMessageHandlerAdapter<FullHttpRequest> {
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private final String websocketPath;
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private final String subprotocols;
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private final boolean allowExtensions;
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public WebSocketServerProtocolHandshakeHandler(String websocketPath, String subprotocols,
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boolean allowExtensions) {
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super(FullHttpRequest.class);
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this.websocketPath = websocketPath;
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this.subprotocols = subprotocols;
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this.allowExtensions = allowExtensions;
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}
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@Override
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public void messageReceived(final ChannelHandlerContext ctx, FullHttpRequest req) throws Exception {
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if (req.getMethod() != GET) {
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sendHttpResponse(ctx, req, new DefaultFullHttpResponse(HTTP_1_1, FORBIDDEN));
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return;
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}
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final WebSocketServerHandshakerFactory wsFactory = new WebSocketServerHandshakerFactory(
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getWebSocketLocation(ctx.pipeline(), req, websocketPath), subprotocols, allowExtensions);
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final WebSocketServerHandshaker handshaker = wsFactory.newHandshaker(req);
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if (handshaker == null) {
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WebSocketServerHandshakerFactory.sendUnsupportedWebSocketVersionResponse(ctx.channel());
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} else {
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final ChannelFuture handshakeFuture = handshaker.handshake(ctx.channel(), req);
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handshakeFuture.addListener(new ChannelFutureListener() {
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@Override
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public void operationComplete(ChannelFuture future) throws Exception {
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if (!future.isSuccess()) {
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ctx.fireExceptionCaught(future.cause());
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}
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}
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});
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WebSocketServerProtocolHandler.setHandshaker(ctx, handshaker);
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ctx.pipeline().replace(this, "WS403Responder",
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WebSocketServerProtocolHandler.forbiddenHttpRequestResponder());
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}
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}
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private static void sendHttpResponse(ChannelHandlerContext ctx, HttpRequest req, HttpResponse res) {
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ChannelFuture f = ctx.channel().write(res);
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if (!isKeepAlive(req) || res.getStatus().code() != 200) {
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f.addListener(ChannelFutureListener.CLOSE);
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}
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}
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private static String getWebSocketLocation(ChannelPipeline cp, HttpRequest req, String path) {
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String protocol = "ws";
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if (cp.get(SslHandler.class) != null) {
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// SSL in use so use Secure WebSockets
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protocol = "wss";
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}
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return protocol + "://" + req.headers().get(HttpHeaders.Names.HOST) + path;
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}
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}
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