Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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.aliyun.oss.common.comm; import java.util.Map.Entry; import org.apache.http.HttpEntity; import org.apache.http.client.methods.HttpDelete; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpHead; import org.apache.http.client.methods.HttpOptions; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.methods.HttpPut; import org.apache.http.client.methods.HttpRequestBase; import com.aliyun.oss.ClientException; import com.aliyun.oss.HttpMethod; import com.aliyun.oss.common.comm.io.ChunkedInputStreamEntity; import com.aliyun.oss.common.utils.HttpHeaders; import com.aliyun.oss.internal.OSSConstants; class HttpRequestFactory { public HttpRequestBase createHttpRequest(ServiceClient.Request request, ExecutionContext context) { String uri = request.getUri(); HttpRequestBase httpRequest; HttpMethod method = request.getMethod(); if (method == HttpMethod.POST) { HttpPost postMethod = new HttpPost(uri); if (request.getContent() != null) { postMethod.setEntity(new RepeatableInputStreamEntity(request)); } httpRequest = postMethod; } else if (method == HttpMethod.PUT) { HttpPut putMethod = new HttpPut(uri); if (request.getContent() != null) { if (request.isUseChunkEncoding()) { putMethod.setEntity(buildChunkedInputStreamEntity(request)); } else { putMethod.setEntity(new RepeatableInputStreamEntity(request)); } } httpRequest = putMethod; } else if (method == HttpMethod.GET) { httpRequest = new HttpGet(uri); } else if (method == HttpMethod.DELETE) { httpRequest = new HttpDelete(uri); } else if (method == HttpMethod.HEAD) { httpRequest = new HttpHead(uri); } else if (method == HttpMethod.OPTIONS) { httpRequest = new HttpOptions(uri); } else { throw new ClientException("Unknown HTTP method name: " + method.toString()); } configureRequestHeaders(request, context, httpRequest); return httpRequest; } private HttpEntity buildChunkedInputStreamEntity(ServiceClient.Request request) { ChunkedInputStreamEntity requestEntity = new ChunkedInputStreamEntity(request); if (!request.isUseUrlSignature()) { requestEntity.setContentType(OSSConstants.DEFAULT_OBJECT_CONTENT_TYPE); } return requestEntity; } private void configureRequestHeaders(ServiceClient.Request request, ExecutionContext context, HttpRequestBase httpRequest) { for (Entry<String, String> entry : request.getHeaders().entrySet()) { if (entry.getKey().equalsIgnoreCase(HttpHeaders.CONTENT_LENGTH) || entry.getKey().equalsIgnoreCase(HttpHeaders.HOST)) { continue; } httpRequest.addHeader(entry.getKey(), entry.getValue()); } if (!request.isUseUrlSignature() && (httpRequest.getHeaders(HttpHeaders.CONTENT_TYPE) == null || httpRequest.getHeaders(HttpHeaders.CONTENT_TYPE).length == 0)) { httpRequest.addHeader(HttpHeaders.CONTENT_TYPE, "application/x-www-form-urlencoded; " + "charset=" + context.getCharset().toLowerCase()); } } }