content: /*
   * 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.odps.commons.transport;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.net.HttpURLConnection;
  import java.net.Proxy;
  
  import com.aliyun.odps.Survey;
  import com.aliyun.odps.commons.transport.Request.Method;
  import com.aliyun.odps.commons.util.IOUtils;
  
  /**
   * DefaultTransport基于JDK的{@link HttpURLConnection}提供HTTP请求功能
   *
   * @author shenggong.wang@alibaba-inc.com
   */
  @Survey
  public class DefaultTransport implements Transport {
  
    private Proxy proxy;
  
    public DefaultTransport() {
    }
  
    @Override
    public Connection connect(Request req) throws IOException {
      DefaultConnection conn = new DefaultConnection(proxy);
      conn.connect(req);
      return conn;
    }
  
    @Override
    public void setProxy(Proxy proxy) {
      this.proxy = proxy;
    }
  
    @Override
    public Response request(Request req) throws IOException {
      Connection conn = connect(req);
      DefaultResponse resp = null;
      try {
        // send request body
        if (req.getBody() != null) {
          OutputStream out = conn.getOutputStream();
          IOUtils.copyLarge(req.getBody(), out);
          out.close();
        }
  
        resp = (DefaultResponse) conn.getResponse();
  
        if (Method.HEAD != req.getMethod()) {
          InputStream in = conn.getInputStream();
          resp.setBody(IOUtils.readFully(in));
        }
  
      } finally {
        conn.disconnect();
      }
      return resp;
    }
  
  }
  