Examples with HttpClientCodec io.netty.handler.codec.http.HttpClientCodec used on opensource projects

Example 6 with HttpClientCodec

use of io.netty.handler.codec.http.HttpClientCodec in project netty by netty.

the class WebSocketClientHandshaker method processHandshake.

/**
     * Process the opening handshake initiated by {@link #handshake}}.
     *
     * @param channel
     *            Channel
     * @param response
     *            HTTP response containing the closing handshake details
     * @param promise
     *            the {@link ChannelPromise} to notify once the handshake completes.
     * @return future
     *            the {@link ChannelFuture} which is notified once the handshake completes.
     */
public final ChannelFuture processHandshake(final Channel channel, HttpResponse response, final ChannelPromise promise) {
    if (response instanceof FullHttpResponse) {
        try {
            finishHandshake(channel, (FullHttpResponse) response);
            promise.setSuccess();
        } catch (Throwable cause) {
            promise.setFailure(cause);
        }
    } else {
        ChannelPipeline p = channel.pipeline();
        ChannelHandlerContext ctx = p.context(HttpResponseDecoder.class);
        if (ctx == null) {
            ctx = p.context(HttpClientCodec.class);
            if (ctx == null) {
                return promise.setFailure(new IllegalStateException("ChannelPipeline does not contain " + "a HttpResponseDecoder or HttpClientCodec"));
            }
        }
        // Add aggregator and ensure we feed the HttpResponse so it is aggregated. A limit of 8192 should be more
        // then enough for the websockets handshake payload.
        //
        // TODO: Make handshake work without HttpObjectAggregator at all.
        String aggregatorName = "httpAggregator";
        p.addAfter(ctx.name(), aggregatorName, new HttpObjectAggregator(8192));
        p.addAfter(aggregatorName, "handshaker", new SimpleChannelInboundHandler<FullHttpResponse>() {

            @Override
            protected void channelRead0(ChannelHandlerContext ctx, FullHttpResponse msg) throws Exception {
                // Remove ourself and do the actual handshake
                ctx.pipeline().remove(this);
                try {
                    finishHandshake(channel, msg);
                    promise.setSuccess();
                } catch (Throwable cause) {
                    promise.setFailure(cause);
                }
            }

            @Override
            public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
                // Remove ourself and fail the handshake promise.
                ctx.pipeline().remove(this);
                promise.setFailure(cause);
            }

            @Override
            public void channelInactive(ChannelHandlerContext ctx) throws Exception {
                // Fail promise if Channel was closed
                promise.tryFailure(CLOSED_CHANNEL_EXCEPTION);
                ctx.fireChannelInactive();
            }
        });
        try {
            ctx.fireChannelRead(ReferenceCountUtil.retain(response));
        } catch (Throwable cause) {
            promise.setFailure(cause);
        }
    }
    return promise;
}

Example 7 with HttpClientCodec

use of io.netty.handler.codec.http.HttpClientCodec in project netty by netty.

the class WebSocketClientHandshaker method handshake.

/**
     * Begins the opening handshake
     *
     * @param channel
     *            Channel
     * @param promise
     *            the {@link ChannelPromise} to be notified when the opening handshake is sent
     */
public final ChannelFuture handshake(Channel channel, final ChannelPromise promise) {
    FullHttpRequest request = newHandshakeRequest();
    HttpResponseDecoder decoder = channel.pipeline().get(HttpResponseDecoder.class);
    if (decoder == null) {
        HttpClientCodec codec = channel.pipeline().get(HttpClientCodec.class);
        if (codec == null) {
            promise.setFailure(new IllegalStateException("ChannelPipeline does not contain " + "a HttpResponseDecoder or HttpClientCodec"));
            return promise;
        }
    }
    channel.writeAndFlush(request).addListener(new ChannelFutureListener() {

        @Override
        public void operationComplete(ChannelFuture future) {
            if (future.isSuccess()) {
                ChannelPipeline p = future.channel().pipeline();
                ChannelHandlerContext ctx = p.context(HttpRequestEncoder.class);
                if (ctx == null) {
                    ctx = p.context(HttpClientCodec.class);
                }
                if (ctx == null) {
                    promise.setFailure(new IllegalStateException("ChannelPipeline does not contain " + "a HttpRequestEncoder or HttpClientCodec"));
                    return;
                }
                p.addAfter(ctx.name(), "ws-encoder", newWebSocketEncoder());
                promise.setSuccess();
            } else {
                promise.setFailure(future.cause());
            }
        }
    });
    return promise;
}

Example 8 with HttpClientCodec

use of io.netty.handler.codec.http.HttpClientCodec in project spring-framework by spring-projects.

the class Netty4ClientHttpRequestFactory method buildBootstrap.

private Bootstrap buildBootstrap(URI uri, boolean isSecure) {
    Bootstrap bootstrap = new Bootstrap();
    bootstrap.group(this.eventLoopGroup).channel(NioSocketChannel.class).handler(new ChannelInitializer<SocketChannel>() {

        @Override
        protected void initChannel(SocketChannel channel) throws Exception {
            configureChannel(channel.config());
            ChannelPipeline pipeline = channel.pipeline();
            if (isSecure) {
                Assert.notNull(sslContext, "sslContext should not be null");
                pipeline.addLast(sslContext.newHandler(channel.alloc(), uri.getHost(), uri.getPort()));
            }
            pipeline.addLast(new HttpClientCodec());
            pipeline.addLast(new HttpObjectAggregator(maxResponseSize));
            if (readTimeout > 0) {
                pipeline.addLast(new ReadTimeoutHandler(readTimeout, TimeUnit.MILLISECONDS));
            }
        }
    });
    return bootstrap;
}

Example 9 with HttpClientCodec

use of io.netty.handler.codec.http.HttpClientCodec in project apn-proxy by apn-proxy.

the class TestHttpClientChannelInitializer method initChannel.

@Override
public void initChannel(SocketChannel ch) throws Exception {
    // Create a default pipeline implementation.
    ChannelPipeline p = ch.pipeline();
    p.addLast("log", new LoggingHandler(LogLevel.INFO));
    //        if (ssl) {
    //            SSLContext sslcontext = SSLContext.getInstance("TLS");
    //
    //            sslcontext.init(null, null, null);
    //
    //            SSLEngine engine = sslcontext.createSSLEngine();
    //            engine.setUseClientMode(true);
    //
    //            p.addLast("ssl", new SslHandler(engine));
    //        }
    p.addLast("codec", new HttpClientCodec());
    // Remove the following line if you don't want automatic content decompression.
    p.addLast("inflater", new HttpContentDecompressor());
    p.addLast("handler", new TestHttpClientHandler());
}

Example 10 with HttpClientCodec

use of io.netty.handler.codec.http.HttpClientCodec in project riposte by Nike-Inc.

the class StreamingAsyncHttpClient method prepChannelForDownstreamCall.

protected void prepChannelForDownstreamCall(ChannelPool pool, Channel ch, StreamingCallback callback, Deque<Span> distributedSpanStackToUse, Map<String, String> mdcContextToUse, boolean isSecureHttpsCall, boolean relaxedHttpsValidation, boolean performSubSpanAroundDownstreamCalls, long downstreamCallTimeoutMillis, ObjectHolder<Boolean> callActiveHolder, ObjectHolder<Boolean> lastChunkSentDownstreamHolder) throws SSLException, NoSuchAlgorithmException, KeyStoreException {
    ChannelHandler chunkSenderHandler = new SimpleChannelInboundHandler<HttpObject>() {

        @Override
        protected void channelRead0(ChannelHandlerContext downstreamCallCtx, HttpObject msg) throws Exception {
            try {
                //      the call is fully processed should not trigger the behavior a second time.
                if (callActiveHolder.heldObject) {
                    if (msg instanceof LastHttpContent) {
                        lastChunkSentDownstreamHolder.heldObject = true;
                        if (performSubSpanAroundDownstreamCalls) {
                            // Complete the subspan.
                            runnableWithTracingAndMdc(() -> {
                                if (distributedSpanStackToUse == null || distributedSpanStackToUse.size() < 2)
                                    Tracer.getInstance().completeRequestSpan();
                                else
                                    Tracer.getInstance().completeSubSpan();
                            }, distributedSpanStackToUse, mdcContextToUse).run();
                        }
                    }
                    HttpObject msgToPass = msg;
                    if (msg instanceof HttpResponse) {
                        // We can't pass the original HttpResponse back to the callback due to intricacies of how
                        //      Netty handles determining the last chunk. If we do, and the callback ends up writing
                        //      the message out to the client (which happens during proxy routing for example), then
                        //      msg's headers might get modified - potentially causing this channel pipeline to
                        //      never send a LastHttpContent, which will in turn cause an indefinite hang.
                        HttpResponse origHttpResponse = (HttpResponse) msg;
                        HttpResponse httpResponse = (msg instanceof FullHttpResponse) ? new DefaultFullHttpResponse(origHttpResponse.getProtocolVersion(), origHttpResponse.getStatus(), ((FullHttpResponse) msg).content()) : new DefaultHttpResponse(origHttpResponse.getProtocolVersion(), origHttpResponse.getStatus());
                        httpResponse.headers().add(origHttpResponse.headers());
                        msgToPass = httpResponse;
                    }
                    callback.messageReceived(msgToPass);
                } else {
                    if (shouldLogBadMessagesAfterRequestFinishes) {
                        runnableWithTracingAndMdc(() -> logger.warn("Received HttpObject msg when call was not active: {}", String.valueOf(msg)), distributedSpanStackToUse, mdcContextToUse).run();
                    }
                }
            } finally {
                if (msg instanceof LastHttpContent) {
                    releaseChannelBackToPoolIfCallIsActive(ch, pool, callActiveHolder, "last content chunk sent", distributedSpanStackToUse, mdcContextToUse);
                }
            }
        }
    };
    Consumer<Throwable> doErrorHandlingConsumer = (cause) -> {
        Pair<Deque<Span>, Map<String, String>> originalThreadInfo = null;
        try {
            // Setup tracing and MDC so our log messages have the correct distributed trace info, etc.
            originalThreadInfo = linkTracingAndMdcToCurrentThread(distributedSpanStackToUse, mdcContextToUse);
            //      call is fully processed should not trigger the behavior a second time.
            if (callActiveHolder.heldObject) {
                if (performSubSpanAroundDownstreamCalls) {
                    if (distributedSpanStackToUse == null || distributedSpanStackToUse.size() < 2)
                        Tracer.getInstance().completeRequestSpan();
                    else
                        Tracer.getInstance().completeSubSpan();
                }
                Tracer.getInstance().unregisterFromThread();
                if (cause instanceof Errors.NativeIoException) {
                    // NativeIoExceptions are often setup to not have stack traces which is bad for debugging.
                    //      Wrap it in a NativeIoExceptionWrapper that maps to a 503 since this is likely a busted
                    //      connection and a second attempt should work.
                    cause = new NativeIoExceptionWrapper("Caught a NativeIoException in the downstream streaming call pipeline. Wrapped it in a " + "NativeIoExceptionWrapper so that it maps to a 503 and provides a usable stack trace " + "in the logs.", (Errors.NativeIoException) cause);
                }
                callback.unrecoverableErrorOccurred(cause);
            } else {
                if (cause instanceof DownstreamIdleChannelTimeoutException) {
                    logger.debug("A channel used for downstream calls will be closed because it was idle too long. " + "This is normal behavior and does not indicate a downstream call failure: {}", cause.toString());
                } else {
                    logger.warn("Received exception in downstream call pipeline after the call was finished. " + "Not necessarily anything to worry about but in case it helps debugging the " + "exception was: {}", cause.toString());
                }
            }
        } finally {
            // Mark the channel as broken so it will be closed and removed from the pool when it is returned.
            markChannelAsBroken(ch);
            // Release it back to the pool if possible/necessary so the pool can do its usual cleanup.
            releaseChannelBackToPoolIfCallIsActive(ch, pool, callActiveHolder, "error received in downstream pipeline: " + cause.toString(), distributedSpanStackToUse, mdcContextToUse);
            // No matter what the cause is we want to make sure the channel is closed. Doing this raw ch.close()
            //      here will catch the cases where this channel does not have an active call but still needs to be
            //      closed (e.g. an idle channel timeout that happens in-between calls).
            ch.close();
            // Unhook the tracing and MDC stuff from this thread now that we're done.
            unlinkTracingAndMdcFromCurrentThread(originalThreadInfo);
        }
    };
    ChannelHandler errorHandler = new ChannelInboundHandlerAdapter() {

        @Override
        public void exceptionCaught(ChannelHandlerContext downstreamCallCtx, Throwable cause) throws Exception {
            doErrorHandlingConsumer.accept(cause);
        }

        @Override
        public void channelInactive(ChannelHandlerContext ctx) throws Exception {
            if (logger.isDebugEnabled()) {
                runnableWithTracingAndMdc(() -> logger.debug("Downstream channel closing. call_active={}, last_chunk_sent_downstream={}, channel_id={}", callActiveHolder.heldObject, lastChunkSentDownstreamHolder.heldObject, ctx.channel().toString()), distributedSpanStackToUse, mdcContextToUse).run();
            }
            // We only care if the channel was closed while the call was active.
            if (callActiveHolder.heldObject)
                doErrorHandlingConsumer.accept(new DownstreamChannelClosedUnexpectedlyException(ch));
            super.channelInactive(ctx);
        }
    };
    // Set up the HTTP client pipeline.
    ChannelPipeline p = ch.pipeline();
    List<String> registeredHandlerNames = p.names();
    //      couldn't be removed at that time because it wasn't in the channel's eventLoop.
    if (registeredHandlerNames.contains(DOWNSTREAM_IDLE_CHANNEL_TIMEOUT_HANDLER_NAME)) {
        ChannelHandler idleHandler = p.get(DOWNSTREAM_IDLE_CHANNEL_TIMEOUT_HANDLER_NAME);
        if (idleHandler != null)
            p.remove(idleHandler);
    }
    if (debugChannelLifecycleLoggingEnabled && !registeredHandlerNames.contains(DEBUG_LOGGER_HANDLER_NAME)) {
        // Add the channel debug logger if desired.
        p.addFirst(DEBUG_LOGGER_HANDLER_NAME, new LoggingHandler(DOWNSTREAM_CLIENT_CHANNEL_DEBUG_LOGGER_NAME, LogLevel.DEBUG));
    }
    // Add/replace a downstream call timeout detector.
    addOrReplacePipelineHandler(new DownstreamIdleChannelTimeoutHandler(downstreamCallTimeoutMillis, () -> callActiveHolder.heldObject, true, "StreamingAsyncHttpClientChannel-call-timeout", distributedSpanStackToUse, mdcContextToUse), DOWNSTREAM_CALL_TIMEOUT_HANDLER_NAME, p, registeredHandlerNames);
    if (isSecureHttpsCall) {
        // SSL call. Make sure we add the SSL handler if necessary.
        if (!registeredHandlerNames.contains(SSL_HANDLER_NAME)) {
            if (clientSslCtx == null) {
                if (relaxedHttpsValidation) {
                    clientSslCtx = SslContextBuilder.forClient().trustManager(InsecureTrustManagerFactory.INSTANCE).build();
                } else {
                    TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
                    tmf.init((KeyStore) null);
                    clientSslCtx = SslContextBuilder.forClient().trustManager(tmf).build();
                }
            }
            p.addAfter(DOWNSTREAM_CALL_TIMEOUT_HANDLER_NAME, SSL_HANDLER_NAME, clientSslCtx.newHandler(ch.alloc()));
        }
    } else {
        // Not an SSL call. Remove the SSL handler if it's there.
        if (registeredHandlerNames.contains(SSL_HANDLER_NAME))
            p.remove(SSL_HANDLER_NAME);
    }
    // The HttpClientCodec handler deals with HTTP codec stuff so you don't have to. Set it up if it hasn't already
    //      been setup, and inspect it to make sure it's in a "ready to handle a new request" state. Some rare
    //      and currently unknown edgecases can cause us to hit this point with the HttpClientCodec in an unclean
    //      state, and if we barrel forward without cleaning this up the call will fail.
    boolean pipelineContainsHttpClientCodec = registeredHandlerNames.contains(HTTP_CLIENT_CODEC_HANDLER_NAME);
    boolean existingHttpClientCodecIsInBadState = false;
    if (pipelineContainsHttpClientCodec) {
        HttpClientCodec currentCodec = (HttpClientCodec) p.get(HTTP_CLIENT_CODEC_HANDLER_NAME);
        int currentHttpClientCodecInboundState = determineHttpClientCodecInboundState(currentCodec);
        if (currentHttpClientCodecInboundState != 0) {
            runnableWithTracingAndMdc(() -> logger.warn("HttpClientCodec inbound state was not 0. It will be replaced with a fresh HttpClientCodec. " + "bad_httpclientcodec_inbound_state={}", currentHttpClientCodecInboundState), distributedSpanStackToUse, mdcContextToUse).run();
            existingHttpClientCodecIsInBadState = true;
        } else {
            int currentHttpClientCodecOutboundState = determineHttpClientCodecOutboundState(currentCodec);
            if (currentHttpClientCodecOutboundState != 0) {
                runnableWithTracingAndMdc(() -> logger.warn("HttpClientCodec outbound state was not 0. It will be replaced with a fresh HttpClientCodec. " + "bad_httpclientcodec_outbound_state={}", currentHttpClientCodecOutboundState), distributedSpanStackToUse, mdcContextToUse).run();
                existingHttpClientCodecIsInBadState = true;
            }
        }
    }
    //      or replace it if it was in a bad state.
    if (!pipelineContainsHttpClientCodec || existingHttpClientCodecIsInBadState) {
        addOrReplacePipelineHandler(new HttpClientCodec(4096, 8192, 8192, true), HTTP_CLIENT_CODEC_HANDLER_NAME, p, registeredHandlerNames);
    }
    // Update the chunk sender handler and error handler to the newly created versions that know about the correct
    //      callback, dtrace info, etc to use for this request.
    addOrReplacePipelineHandler(chunkSenderHandler, CHUNK_SENDER_HANDLER_NAME, p, registeredHandlerNames);
    addOrReplacePipelineHandler(errorHandler, ERROR_HANDLER_NAME, p, registeredHandlerNames);
}