b7ceeb1797
Motivation: In most cases, HttpMethod instance is built from the factory method and the same instance is taken for known Http Methods. So we can implement fast path for equals(). Modification: Replace == checks with HttpMethod.equals; Use this == o within HttpMethod.equals; Replaced known new HttpMethod with HttpMethod.valueOf; Result: Comparisons should be a bit faster in some cases.
112 lines
4.4 KiB
Java
112 lines
4.4 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.example.http.websocketx.server;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.Unpooled;
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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.ChannelPipeline;
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import io.netty.channel.SimpleChannelInboundHandler;
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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.FullHttpResponse;
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import io.netty.handler.codec.http.HttpHeaderNames;
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import io.netty.handler.codec.http.HttpRequest;
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import io.netty.handler.codec.http.HttpUtil;
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import io.netty.handler.ssl.SslHandler;
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import io.netty.util.CharsetUtil;
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import static io.netty.handler.codec.http.HttpMethod.GET;
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import static io.netty.handler.codec.http.HttpResponseStatus.BAD_REQUEST;
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import static io.netty.handler.codec.http.HttpResponseStatus.FORBIDDEN;
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import static io.netty.handler.codec.http.HttpResponseStatus.NOT_FOUND;
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import static io.netty.handler.codec.http.HttpResponseStatus.OK;
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import static io.netty.handler.codec.http.HttpVersion.HTTP_1_1;
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/**
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* Outputs index page content.
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*/
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public class WebSocketIndexPageHandler extends SimpleChannelInboundHandler<FullHttpRequest> {
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private final String websocketPath;
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public WebSocketIndexPageHandler(String websocketPath) {
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this.websocketPath = websocketPath;
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}
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@Override
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protected void channelRead0(ChannelHandlerContext ctx, FullHttpRequest req) throws Exception {
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// Handle a bad request.
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if (!req.decoderResult().isSuccess()) {
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sendHttpResponse(ctx, req, new DefaultFullHttpResponse(HTTP_1_1, BAD_REQUEST));
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return;
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}
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// Allow only GET methods.
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if (!GET.equals(req.method())) {
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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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// Send the index page
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if ("/".equals(req.uri()) || "/index.html".equals(req.uri())) {
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String webSocketLocation = getWebSocketLocation(ctx.pipeline(), req, websocketPath);
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ByteBuf content = WebSocketServerIndexPage.getContent(webSocketLocation);
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FullHttpResponse res = new DefaultFullHttpResponse(HTTP_1_1, OK, content);
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res.headers().set(HttpHeaderNames.CONTENT_TYPE, "text/html; charset=UTF-8");
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HttpUtil.setContentLength(res, content.readableBytes());
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sendHttpResponse(ctx, req, res);
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} else {
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sendHttpResponse(ctx, req, new DefaultFullHttpResponse(HTTP_1_1, NOT_FOUND));
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}
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}
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@Override
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public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
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cause.printStackTrace();
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ctx.close();
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}
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private static void sendHttpResponse(ChannelHandlerContext ctx, FullHttpRequest req, FullHttpResponse res) {
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// Generate an error page if response getStatus code is not OK (200).
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if (res.status().code() != 200) {
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ByteBuf buf = Unpooled.copiedBuffer(res.status().toString(), CharsetUtil.UTF_8);
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res.content().writeBytes(buf);
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buf.release();
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HttpUtil.setContentLength(res, res.content().readableBytes());
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}
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// Send the response and close the connection if necessary.
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ChannelFuture f = ctx.channel().writeAndFlush(res);
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if (!HttpUtil.isKeepAlive(req) || res.status().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(HttpHeaderNames.HOST) + path;
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}
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}
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