Examples of java.net.HttpURLConnection

java.net.HttpURLConnection
3.org/pub/WWW/Protocols/"> the spec for details.
Each HttpURLConnection instance is used to make a single request but the underlying network connection to the HTTP server may be transparently shared by other instances. Calling the close() methods on the InputStream or OutputStream of an HttpURLConnection after a request may free network resources associated with this instance but has no effect on any shared persistent connection. Calling the disconnect() method may close the underlying socket if a persistent connection is otherwise idle at that time. @see java.net.HttpURLConnection#disconnect() @since JDK1.1

    
    conn = new URL(realUrlStr).openConnection();
    
    if (conn instanceof HttpURLConnection)
    {  // TODO: this is probably why JMF has explicit HTTP and FTP data sources - so we can check things explicitly.
      final HttpURLConnection huc = (HttpURLConnection) conn;
      if (user != null && !user.equals(""))
      {  huc.setRequestProperty("Authorization", "Basic " + StringUtils.byteArrayToBase64String((user + ":" + pass).getBytes()));
      }
      huc.connect();
      
      final int code = huc.getResponseCode();
      if (!(code >= 200 && code < 300))
      {  huc.disconnect();
        throw new IOException("HTTP response code: " + code);
      }  
      
      // TODO: what is the right place to apply ContentDescriptor.mimeTypeToPackageName?
      contentTypeStr = ContentDescriptor.mimeTypeToPackageName(stripTrailer(conn.getContentType()));

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      return;
    if (conn != null)
    {
      if (conn instanceof HttpURLConnection)
      {
        final HttpURLConnection huc = (HttpURLConnection) conn;
        huc.disconnect();
      }
      // TODO: others
    }
    connected = false;
  }

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      throw new RuntimeException(e);
    }
  }


  public static String getResponseText(URL constructedUrl, String encoding) {
    HttpURLConnection conn = null;
    try {
      conn = (HttpURLConnection) constructedUrl.openConnection();
      BufferedReader in = null;
      if (null == encoding) {
        in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
      } else {
        in = new BufferedReader(new InputStreamReader(conn.getInputStream(), encoding));
      }
      String line;
      final StringBuffer stringBuffer = new StringBuffer(255);


      synchronized (stringBuffer) {
        while ((line = in.readLine()) != null) {
          stringBuffer.append(line);
          stringBuffer.append("\n");
        }
        return stringBuffer.toString();
      }
    } catch (final Exception e) {
      e.printStackTrace();
      throw new RuntimeException(e);
    } finally {
      if (conn != null) {
        conn.disconnect();
      }
    }
  }

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        return content;
    }
    private static String fetchContentOrNull(String urlToRead) {
        // slow but standard
        URL url;
        HttpURLConnection conn;
        BufferedReader rd;
        String line;
        StringBuilder result = new StringBuilder();
        try {
           url = new URL(urlToRead);
           conn = (HttpURLConnection) url.openConnection();
           conn.setRequestMethod("GET");
           rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
           while ((line = rd.readLine()) != null) {
              result.append(line);
           }
           rd.close();
        } catch (Exception e) {

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    // URL to Tomcat 
    URL url = new URL("http", host, 8080, "/") ;
    try {
      URLConnection conn = url.openConnection() ;
      if (conn instanceof HttpURLConnection) {
        HttpURLConnection http = (HttpURLConnection) conn ;
        int responseCode = http.getResponseCode();
        
        if (responseCode > 0 && responseCode < 400) {
          return true ;
        }
      }

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                .getType("article"));
            entry.setField("citeseerurl", id);


            try {
                URL citeseerUrl = new URL(OAI_URL + id);
                HttpURLConnection citeseerConnection = (HttpURLConnection) citeseerUrl
                    .openConnection();
                InputStream inputStream = citeseerConnection.getInputStream();


                DefaultHandler handlerBase = new CiteSeerEntryFetcherHandler(entry);


                if (saxParser == null)
                    saxParser = SAXParserFactory.newInstance().newSAXParser();

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   * @return The imnported BibtexEntry or null if none.
   */
  private BibtexDatabase importSpiresEntries(String key, OutputPrinter frame) {
    String url = constructUrl(key);
    try {
      HttpURLConnection conn = (HttpURLConnection) (new URL(url)).openConnection();
      conn.setRequestProperty("User-Agent", "Jabref");
      InputStream inputStream = conn.getInputStream();


      SPIRESBibtexFilterReader reader = new SPIRESBibtexFilterReader(
          new InputStreamReader(inputStream));


      ParserResult pr = BibtexParser.parse(reader);

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            }
      System.out.println(url);
      try {
              URL trueURL = new URL(url);
              logger.info("Sending crush report...");
              HttpURLConnection conn = (HttpURLConnection) trueURL.openConnection();
              if(conn.getResponseCode()==200) {
                logger.info("Send crush report OK.");
              }else {
                logger.info("Send crush report Failed. status="+conn.getResponseCode()+" "+conn.getResponseMessage());
              }
            } catch (MalformedURLException e) {
              logger.info("send crush report Failed",e);
            } catch (IOException e) {
              logger.info("send crush report Failed",e);

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   * @throws IOException
   */
  public static HttpURLConnection openConnection(String url, String method, String contentType, String ssic) throws IOException
  {
    URL realURL = new URL(url);
    HttpURLConnection conn = (HttpURLConnection) realURL.openConnection();
    //conn.setRequestProperty("User-Agent", "IIC2.0/PC "+FetionClient.PROTOCOL_VERSION);
    conn.setRequestProperty("User-Agent", "IIC2.0/PC 4.0.0000");
    conn.setRequestProperty("Cookie", "ssic="+ssic);
    conn.setRequestProperty("Host", realURL.getHost());
    conn.setRequestProperty("Accept", "*/*");
    conn.setRequestProperty("Cache-Control", "no-cache");
    if(contentType!=null)  conn.setRequestProperty("Content-Type", contentType);
    conn.setRequestMethod(method);
    return conn;
  }

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   * @return
   * @throws IOException
   */
  public static byte[] doFetchData(String url, String method, String contentType, String ssic, InputStream in) throws IOException
  {
    HttpURLConnection conn = openConnection(url, method, contentType, ssic);
    if(in!=null)  sendData(conn, in);
    if(conn.getResponseCode()==HttpURLConnection.HTTP_OK){
      return fetchData(conn);
    }else{
      throw new IOException("Http response is not OK. code="+conn.getResponseCode());
    }
  }

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