how do i write url connection in the loop?

i have this method which sends binary data to server

the code works fine, but still, it's structure is kinda stupid:

output and input connections are opened like thousands times (depends on data size), closed only once.

i cannot move the code that opens connection outside of the loop 'cause i'm getting strange errors, like the data was never sent to server.

please help me to restructure this code so it could still work and have a correct structure:

Code:

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OutputStream os = null;
StringBuffer messagebuffer = new StringBuffer();
HttpURLConnection huc = null;
DataInputStream dis = null;
InputStream in = null;
Path path = null;
byte[] buf = new byte[64 * 1024];
int bytesRead = 0;

try {
  path = Paths.get("D:\\testfile.rar");
  in = Files.newInputStream(path);

  int i = 0;
  URL u = new URL(defaultURL);

  while ((bytesRead = in.read(buf)) != -1) {

    huc = (HttpURLConnection) u.openConnection(); // wrong
    huc.setRequestMethod("POST");
    huc.setRequestProperty("chunk-number", i + "");
    huc.setDoOutput(true); // wrong
    huc.setDoInput(true); // wrong
    os = huc.getOutputStream(); // wrong
    os.write(buf, 0, bytesRead);
    os.flush();
    System.out.println(i++ + " " + bytesRead);

    int ch;
    dis = new DataInputStream(huc.getInputStream()); // wrong

    long len = huc.getContentLength();
    if (len != -1) {
      for (int k = 0; k < len; k++)
        if ((ch = dis.read()) != -1)
          messagebuffer.append((char) ch);
        else {
          // if the content-length is not available
          while ((ch = dis.read()) != -1)
            messagebuffer.append((char) ch);
          }
    }
    Thread.sleep(16);
  }
  dis.close();
  huc.disconnect();

  int statusCode = huc.getResponseCode();
  String message = huc.getResponseMessage();
  messagebuffer.append("status code=" + statusCode + "\n");
  messagebuffer.append("response message=" + message + "\n");

} catch (Exception ex) {
  // throw errors
} finally {           
  // closing stuff
}
return messagebuffer.toString();

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Cross posted
java - how do i write url connection in the loop - Stack Overflow

db

Can you make a version of the code so it compiles and executes for testing? A SSCCE.

Quote:

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Originally Posted by Norm

Can you make a version of the code so it compiles and executes for testing? A SSCCE.

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this code is fully functional. just place it inside method, like

Code:

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private String sendPost() {
  // place it here
}

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P.S. Yes, i've posted on Stackoverflow, but the people back there only care about reputation and haven't helped me at all

Quote:

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just place it inside method

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Ok, I'll wait until someone takes care of making code that is executable.
That requires import statements and a class and a main etc