42c65cca3a
- Move common methods from ByteBuf to Buf - Rename ensureWritableBytes() to ensureWritable() - Rename readable() to isReadable() - Rename writable() to isWritable() - Add isReadable(int) and isWritable(int) - Add AbstractMessageBuf - Rewrite DefaultMessageBuf and QueueBackedMessageBuf - based on Josh Bloch's public domain ArrayDeque impl
200 lines
7.8 KiB
Java
200 lines
7.8 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.snoop;
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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.ChannelInboundMessageHandlerAdapter;
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import io.netty.handler.codec.DecoderResult;
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import io.netty.handler.codec.http.Cookie;
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import io.netty.handler.codec.http.CookieDecoder;
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import io.netty.handler.codec.http.DefaultFullHttpResponse;
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import io.netty.handler.codec.http.DefaultHttpResponse;
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import io.netty.handler.codec.http.FullHttpResponse;
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import io.netty.handler.codec.http.HttpContent;
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import io.netty.handler.codec.http.HttpHeaders;
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import io.netty.handler.codec.http.HttpObject;
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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.codec.http.LastHttpContent;
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import io.netty.handler.codec.http.QueryStringDecoder;
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import io.netty.handler.codec.http.ServerCookieEncoder;
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import io.netty.util.CharsetUtil;
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import java.util.List;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.Set;
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import static io.netty.handler.codec.http.HttpHeaders.Names.*;
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import static io.netty.handler.codec.http.HttpHeaders.*;
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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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public class HttpSnoopServerHandler extends ChannelInboundMessageHandlerAdapter<Object> {
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private HttpRequest request;
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/** Buffer that stores the response content */
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private final StringBuilder buf = new StringBuilder();
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@Override
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public void messageReceived(ChannelHandlerContext ctx, Object msg) throws Exception {
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if (msg instanceof HttpRequest) {
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HttpRequest request = this.request = (HttpRequest) msg;
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if (is100ContinueExpected(request)) {
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send100Continue(ctx);
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}
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buf.setLength(0);
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buf.append("WELCOME TO THE WILD WILD WEB SERVER\r\n");
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buf.append("===================================\r\n");
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buf.append("VERSION: ").append(request.getProtocolVersion()).append("\r\n");
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buf.append("HOSTNAME: ").append(getHost(request, "unknown")).append("\r\n");
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buf.append("REQUEST_URI: ").append(request.getUri()).append("\r\n\r\n");
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List<Map.Entry<String, String>> headers = request.headers().entries();
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if (!headers.isEmpty()) {
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for (Map.Entry<String, String> h: request.headers().entries()) {
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String key = h.getKey();
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String value = h.getValue();
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buf.append("HEADER: ").append(key).append(" = ").append(value).append("\r\n");
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}
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buf.append("\r\n");
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}
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QueryStringDecoder queryStringDecoder = new QueryStringDecoder(request.getUri());
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Map<String, List<String>> params = queryStringDecoder.parameters();
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if (!params.isEmpty()) {
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for (Entry<String, List<String>> p: params.entrySet()) {
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String key = p.getKey();
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List<String> vals = p.getValue();
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for (String val : vals) {
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buf.append("PARAM: ").append(key).append(" = ").append(val).append("\r\n");
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}
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}
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buf.append("\r\n");
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}
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appendDecoderResult(buf, request);
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}
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if (msg instanceof HttpContent) {
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HttpContent httpContent = (HttpContent) msg;
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ByteBuf content = httpContent.data();
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if (content.isReadable()) {
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buf.append("CONTENT: ");
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buf.append(content.toString(CharsetUtil.UTF_8));
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buf.append("\r\n");
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appendDecoderResult(buf, request);
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}
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if (msg instanceof LastHttpContent) {
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buf.append("END OF CONTENT\r\n");
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LastHttpContent trailer = (LastHttpContent) msg;
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if (!trailer.trailingHeaders().isEmpty()) {
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buf.append("\r\n");
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for (String name: trailer.trailingHeaders().names()) {
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for (String value: trailer.trailingHeaders().getAll(name)) {
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buf.append("TRAILING HEADER: ");
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buf.append(name).append(" = ").append(value).append("\r\n");
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}
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}
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buf.append("\r\n");
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}
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writeResponse(ctx, trailer);
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}
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}
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}
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private static void appendDecoderResult(StringBuilder buf, HttpObject o) {
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DecoderResult result = o.getDecoderResult();
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if (result.isSuccess()) {
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return;
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}
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buf.append(".. WITH A ");
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if (result.isPartialFailure()) {
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buf.append("PARTIAL ");
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}
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buf.append("DECODER FAILURE: ");
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buf.append(result.cause());
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buf.append("\r\n");
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}
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private void writeResponse(ChannelHandlerContext ctx, HttpObject currentObj) {
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// Decide whether to close the connection or not.
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boolean keepAlive = isKeepAlive(request);
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// Build the response object.
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FullHttpResponse response = new DefaultFullHttpResponse(
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HTTP_1_1, currentObj.getDecoderResult().isSuccess()? OK : BAD_REQUEST,
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Unpooled.copiedBuffer(buf.toString(), CharsetUtil.UTF_8));
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response.headers().set(CONTENT_TYPE, "text/plain; charset=UTF-8");
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if (keepAlive) {
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// Add 'Content-Length' header only for a keep-alive connection.
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response.headers().set(CONTENT_LENGTH, response.data().readableBytes());
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// Add keep alive header as per:
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// - http://www.w3.org/Protocols/HTTP/1.1/draft-ietf-http-v11-spec-01.html#Connection
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response.headers().set(CONNECTION, HttpHeaders.Values.KEEP_ALIVE);
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}
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// Encode the cookie.
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String cookieString = request.headers().get(COOKIE);
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if (cookieString != null) {
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Set<Cookie> cookies = CookieDecoder.decode(cookieString);
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if (!cookies.isEmpty()) {
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// Reset the cookies if necessary.
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for (Cookie cookie: cookies) {
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response.headers().add(SET_COOKIE, ServerCookieEncoder.encode(cookie));
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}
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}
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} else {
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// Browser sent no cookie. Add some.
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response.headers().add(SET_COOKIE, ServerCookieEncoder.encode("key1", "value1"));
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response.headers().add(SET_COOKIE, ServerCookieEncoder.encode("key2", "value2"));
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}
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// Write the response.
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ChannelFuture future = ctx.write(response);
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// Close the non-keep-alive connection after the write operation is done.
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if (!keepAlive) {
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future.addListener(ChannelFutureListener.CLOSE);
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}
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}
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private static void send100Continue(ChannelHandlerContext ctx) {
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HttpResponse response = new DefaultHttpResponse(HTTP_1_1, CONTINUE);
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ctx.write(response);
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}
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@Override
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public void exceptionCaught(
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ChannelHandlerContext ctx, Throwable cause) throws Exception {
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cause.printStackTrace();
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ctx.close();
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}
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}
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