content: /*
   This file is part of Airsonic.
  
   Airsonic is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
  
   Airsonic is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
  
   You should have received a copy of the GNU General Public License
   along with Airsonic.  If not, see <http://www.gnu.org/licenses/>.
  
   Copyright 2016 (C) Airsonic Authors
   Based upon Subsonic, Copyright 2009 (C) Sindre Mehus
   */
  package org.airsonic.player.controller;
  
  import org.airsonic.player.util.FileUtil;
  import org.apache.commons.io.IOUtils;
  import org.apache.http.client.config.RequestConfig;
  import org.apache.http.client.methods.CloseableHttpResponse;
  import org.apache.http.client.methods.HttpGet;
  import org.apache.http.impl.client.CloseableHttpClient;
  import org.apache.http.impl.client.HttpClients;
  import org.springframework.stereotype.Controller;
  import org.springframework.web.bind.ServletRequestUtils;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.servlet.ModelAndView;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import java.io.InputStream;
  
  import static org.springframework.http.HttpStatus.OK;
  
  /**
   * A proxy for external HTTP requests.
   *
   * @author Sindre Mehus
   */
  @Controller
  @RequestMapping("/proxy")
  public class ProxyController {
  
      @GetMapping
      public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
          String url = ServletRequestUtils.getRequiredStringParameter(request, "url");
  
          RequestConfig requestConfig = RequestConfig.custom()
                  .setConnectTimeout(15000)
                  .setSocketTimeout(15000)
                  .build();
          HttpGet method = new HttpGet(url);
          method.setConfig(requestConfig);
  
          InputStream in = null;
          try (CloseableHttpClient client = HttpClients.createDefault()) {
              try (CloseableHttpResponse resp = client.execute(method)) {
                  int statusCode = resp.getStatusLine().getStatusCode();
                  if (statusCode != OK.value()) {
                      response.sendError(statusCode);
                  } else {
                      in = resp.getEntity().getContent();
                      IOUtils.copy(in, response.getOutputStream());
                  }
              }
          } finally {
              FileUtil.closeQuietly(in);
          }
          return null;
      }
  }
  