/* 
    * 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 org.esigate.server;
  
  import static javax.servlet.http.HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
  import static javax.servlet.http.HttpServletResponse.SC_NOT_FOUND;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.net.HttpURLConnection;
  import java.net.SocketException;
  import java.net.URL;
  
  import org.apache.commons.io.IOUtils;
  
  /**
   * This is just for convenience. It's not safe.
   * <p>
   * From : http://open.bekk.no/embedded-jetty-7-webapp-executable-with-maven/
   * 
   * @author Ole Christian Rynning
   * 
   */
  public final class Http {
  
      private Http() {
      }
  
      public static class Response {
          private final String body;
          private final int code;
  
          public Response(int code) {
              this(code, "");
          }
  
          public Response(int code, String body) {
              this.code = code;
              this.body = body;
          }
      }
  
      /**
       * Perform POST request.
       * 
       * @param uri
       *            target uri
       * @return response.
       */
  
      public static Response doGET(String uri) {
          return http("GET", uri);
      }
  
      static Response http(String method, String uri) {
          try {
              URL url = new URL(uri);
              HttpURLConnection conn = (HttpURLConnection) url.openConnection();
              conn.setRequestMethod(method);
              Object content = conn.getContent();
  
              if (content instanceof InputStream) {
                  return new Response(conn.getResponseCode(), IOUtils.toString((InputStream) content, "UTF-8"));
              } else if (content instanceof String) {
                  return new Response(conn.getResponseCode(), (String) content);
              } else {
                  return new Response(conn.getResponseCode(), "unknown");
              }
  
          } catch (SocketException e) {
              return new Response(SC_NOT_FOUND);
          } catch (IOException e) {
              return new Response(SC_INTERNAL_SERVER_ERROR);
          }
      }
  
      /**
       * Perform POST request.
       * 
       * @param uri
       *            target uri
       * @return response.
       */
      public static Response doPOST(String uri) {
          return http("POST", uri);
      }
 
 }