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

    return sb.toString();
  }
  
  private boolean isImageEmpty(String url) {
    try{
      HttpURLConnection httpConn = (HttpURLConnection) new URL(url).openConnection();
      return httpConn.getContentLength() == 807;
    } catch(IOException e) {
      return true;
    }
  }

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  public void saveAs(File f) throws CoverException {
    FileOutputStream fw = null;
    BufferedInputStream in = null;
    try {
      HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
      httpConn.setDoInput(true);
      in = new BufferedInputStream(httpConn.getInputStream());
  
      f.delete();
      fw = new FileOutputStream(f);
      
      int b;

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              public void run() {
                  running.incrementAndGet();
                  try {
                      int read = 0;
                      int totalRead = 0;
                      HttpURLConnection conn = null;
                      InputStream in = null;


                      URL url = new URL(surl);
                      conn = (HttpURLConnection) url.openConnection();
                      in = new BufferedInputStream(conn.getInputStream(), 4096);
                      byte[] buffer = new byte[4096];
                      while ((read = in.read(buffer)) > 0) {
                          totalRead += read;
                      }
                      in.close();
                           
                      if (totalRead == conn.getContentLength()) {
                          System.out.print(".");
                      } else {
                          errors.add("got " + totalRead + " bytes. expected: " + conn.getContentLength()); 
                      }
                      
                  } catch (Exception e) {
                      e.printStackTrace();
                  }

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        String surl = "http://localhost:" + httpServer.getLocalPort() + "/" + file.getName();
        
        
        int read = 0;
        int totalRead = 0;
        HttpURLConnection conn = null;
        InputStream in = null;


        System.out.println("downloading large file...");
        
        URL url = new URL(surl);
        conn = (HttpURLConnection) url.openConnection();
        in = new BufferedInputStream(conn.getInputStream(), 4096);
        byte[] buffer = new byte[4096];
        while ((read = in.read(buffer)) > 0) {
            totalRead += read;
        }
        in.close();
             
        if (totalRead == conn.getContentLength()) {
            System.out.print(".");
        } else {
            errors.add("got " + totalRead + " bytes. expected: " + conn.getContentLength()); 
        }
        
        file.delete();
        httpServer.close();
  }

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   {
      dispatcher = EmbeddedContainer.start().getDispatcher();
      dispatcher.getRegistry().addPerRequestResource(SimpleResource.class);
      {
         URL url = createURL("/simple");
         HttpURLConnection conn = (HttpURLConnection) url.openConnection();
         @SuppressWarnings("unused")
         Object obj = conn.getContent();
      }
      EmbeddedContainer.stop();
   }

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      }
      System.out.println("*****");
      {
         URL url = createURL("/redirect");
         // HttpURLConnection.setFollowRedirects(false);
         HttpURLConnection conn = (HttpURLConnection) url.openConnection();
         conn.setInstanceFollowRedirects(false);
         conn.setRequestMethod("GET");
         for (Object name : conn.getHeaderFields().keySet())
         {
            System.out.println(name);
         }
         System.out.println(conn.getResponseCode());
      }


   }

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      String uriBase = "http://localhost:" + TestPortProvider.getPort() + "/test/path-param/";
      String expected = "start" + toTest + "end";
      String encoded = "start%" + Integer.toHexString(toTest).toUpperCase() + "end";
      URI uri = URI.create(uriBase + encoded);


      HttpURLConnection connection = (HttpURLConnection) uri.toURL().openConnection();
      connection.setRequestMethod("GET");
      connection.setRequestProperty("accept", "text/plain");
      InputStream is = connection.getInputStream();
      Reader r = new InputStreamReader(is, "UTF-8");
      StringBuffer buf = new StringBuffer();
      char[] chars = new char[1024];
      int charsRead;
      while ((charsRead = r.read(chars)) != -1)

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              public void run() {
                  running.incrementAndGet();
                  try {
                      int read = 0;
                      int totalRead = 0;
                      HttpURLConnection conn = null;
                      InputStream in = null;


                      URL url = new URL(surl);
                      conn = (HttpURLConnection) url.openConnection();
                      in = new BufferedInputStream(conn.getInputStream(), 4096);
                      byte[] buffer = new byte[4096];
                      while ((read = in.read(buffer)) > 0) {
                          totalRead += read;
                      }
                      in.close();
                           
                      if (totalRead == conn.getContentLength()) {
                          System.out.print(".");
                      } else {
                          errors.add("got " + totalRead + " bytes. expected: " + conn.getContentLength()); 
                      }
                      
                  } catch (Exception e) {
                      e.printStackTrace();
                  }

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        String surl = "http://localhost:" + httpServer.getLocalPort() + "/" + file.getName();
        
        
        int read = 0;
        int totalRead = 0;
        HttpURLConnection conn = null;
        InputStream in = null;


        System.out.println("downloading large file...");
        
        URL url = new URL(surl);
        conn = (HttpURLConnection) url.openConnection();
        in = new BufferedInputStream(conn.getInputStream(), 4096);
        byte[] buffer = new byte[4096];
        while ((read = in.read(buffer)) > 0) {
            totalRead += read;
        }
        in.close();
             
        if (totalRead == conn.getContentLength()) {
            System.out.print(".");
        } else {
            errors.add("got " + totalRead + " bytes. expected: " + conn.getContentLength()); 
        }
        
        file.delete();
        httpServer.close();
  }

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     * PDFBox.
     */
    public void testExportSingleSimplePageAsPDF() throws Exception
    {
        URL url = new URL("http://localhost:8080/xwiki/bin/export/Main/WebHome?format=pdf");
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        InputStream is = connection.getInputStream();
        PDDocument pdd = PDDocument.load(is);
        PDFTextStripper stripper = new PDFTextStripper();
        String text = stripper.getText(pdd);
        pdd.close();
        is.close();

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