Java tutorial
/* * Copyright (C) 2012-2013 Facebook, Inc. * * Licensed 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 com.facebook.nifty.client; import com.google.common.net.HttpHeaders; import org.apache.thrift.transport.TTransportException; import org.jboss.netty.buffer.ChannelBuffer; import org.jboss.netty.channel.Channel; import org.jboss.netty.channel.ChannelFuture; import org.jboss.netty.handler.codec.http.DefaultHttpRequest; import org.jboss.netty.handler.codec.http.HttpMethod; import org.jboss.netty.handler.codec.http.HttpRequest; import org.jboss.netty.handler.codec.http.HttpResponse; import org.jboss.netty.handler.codec.http.HttpVersion; import org.jboss.netty.util.Timer; import javax.annotation.concurrent.NotThreadSafe; import java.util.Map; @NotThreadSafe public class HttpClientChannel extends AbstractClientChannel { private final Channel underlyingNettyChannel; private final String hostName; private Map<String, String> headerDictionary; private final String endpointUri; public HttpClientChannel(Channel channel, Timer timer, String hostName, String endpointUri) { super(channel, timer); this.underlyingNettyChannel = channel; this.hostName = hostName; this.endpointUri = endpointUri; } @Override protected int extractSequenceId(ChannelBuffer message) throws TTransportException { try { int sequenceId; int stringLength; stringLength = message.getInt(4); sequenceId = message.getInt(8 + stringLength); return sequenceId; } catch (Throwable t) { throw new TTransportException("Could not find sequenceId in Thrift message"); } } @Override public Channel getNettyChannel() { return underlyingNettyChannel; } @Override protected ChannelBuffer extractResponse(Object message) { if (!(message instanceof HttpResponse)) { return null; } HttpResponse httpResponse = (HttpResponse) message; ChannelBuffer content = httpResponse.getContent(); if (!content.readable()) { return null; } return content; } @Override protected ChannelFuture writeRequest(ChannelBuffer request) { HttpRequest httpRequest = new DefaultHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.POST, endpointUri); httpRequest.setHeader(HttpHeaders.HOST, hostName); httpRequest.setHeader(HttpHeaders.CONTENT_LENGTH, request.readableBytes()); httpRequest.setHeader(HttpHeaders.CONTENT_TYPE, "application/x-thrift"); httpRequest.setHeader(HttpHeaders.USER_AGENT, "Java/Swift-HttpThriftClientChannel"); if (headerDictionary != null) { for (Map.Entry<String, String> entry : headerDictionary.entrySet()) { httpRequest.setHeader(entry.getKey(), entry.getValue()); } } httpRequest.setContent(request); return underlyingNettyChannel.write(httpRequest); } public void setHeaders(Map<String, String> headers) { this.headerDictionary = headers; } }