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Thread: Applet writing to an http server.

  1. #1
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    Default Applet writing to an http server.

    I am trying to write to an http server, but nothing happens. I can read from the file, I just cannot write to it and no errors are thrown. I do not know how to proceed.

    Specifically, I have a text file on my server, and I can read from it (the text file already has content), but I cannot write to it. And, no exceptions are thrown.
     
        url = new URL("http://kajl-ig.com/txt.txt"); 
        urlConn = url.openConnection(); 
        urlConn.setDoInput(true); 
        urlConn.setDoOutput(true); 
        urlConn.setUseCaches(false); 
        BufferedWriter  bw = new BufferedWriter(new OutputStreamWriter(urlConn.getOutputStream()));
        String s = "TEST Successfull!"; 
     
    	bw.write(s); // doesn't work
    	bw.close();
     
    	BufferedReader br = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
    	System.out.println(br.readLine()); // works
      } 
     
      catch (MalformedURLException mue) { System.out.println("MUE");
      } 
      catch (IOException ioe) { System.out.println("IOE");
      }

    That was my initial code, here is another API I tried:

    URL                url; 
        URLConnection      urlConn; 
        DataOutputStream   dos; 
        DataInputStream    dis;
     
        url = new URL("http://kajl-ig.com/txt.txt"); 
        urlConn = url.openConnection(); 
        urlConn.setDoInput(true); 
        urlConn.setDoOutput(true); 
        urlConn.setUseCaches(false); 
        BufferedWriter  bw = new BufferedWriter(new OutputStreamWriter(urlConn.getOutputStream()));
        String message = "TEST Successfull!"; 
     
     
        dos = new DataOutputStream (urlConn.getOutputStream());  
        dos.writeBytes(message); 
        	dos.flush();
    	dos.close();
     
        dis = new DataInputStream(urlConn.getInputStream()); 
        String s = dis.readLine(); 
        dis.close(); 
       System.out.println(s+" "+dos.size());
     
      } // end of "try"
     
      catch (MalformedURLException mue) { System.out.println("MUE");
      } 
      catch (IOException ioe) { System.out.println("IOE");
      }

    The second code, I got from some random website, and I was desperate so I tried it. I am not sure what the
    urlConn.setRequestProperty (String, String);
    method does, so I removed it and it reads fine it just cannot write.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Applet writing to an http server.

    I can read from the file, I just cannot write to it
    I have a text file on my server, and I can read from it (the text file already has content), but I cannot write to it.
    Are you asking about How would your code write to a file on the server? That would be controlled by the code on the server.
    If you don't understand my answer, don't ignore it, ask a question.

  3. The Following User Says Thank You to Norm For This Useful Post:

    KAJLogic (July 7th, 2014)

  4. #3
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    Default Re: Applet writing to an http server.

    I was under the impression I could write to any http server (via a basic CGI). I am using hostgator, and I can do file transfers via FTP. So, this should reproduce that essentially right?

  5. #4
    Super Moderator Norm's Avatar
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    Default Re: Applet writing to an http server.

    My understanding of a server is that it will respond to requests. The client sends a request and the server will do what it is programmed to do.
    What kind of server are you testing with?
    If you don't understand my answer, don't ignore it, ask a question.

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    KAJLogic (July 7th, 2014)

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    Default Re: Applet writing to an http server.

    I have very limited access to their gateway.

  8. #6
    Super Moderator Norm's Avatar
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    Default Re: Applet writing to an http server.

    I have very limited access to their gateway.
    Sorry, I don't understand what that means.

    How is that related to your problem?

    Have you tried testing with a localhost server?
    If you don't understand my answer, don't ignore it, ask a question.

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    KAJLogic (July 7th, 2014)

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    Default Re: Applet writing to an http server.

    Yes, it has to be a server side issue. When I said gateway I was referring to a gateway interface for retrieving or accessing their SQL.

  11. #8
    Super Moderator Norm's Avatar
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    Default Re: Applet writing to an http server.

    Do you have any more questions about this?
    If you don't understand my answer, don't ignore it, ask a question.

  12. The Following User Says Thank You to Norm For This Useful Post:

    KAJLogic (July 7th, 2014)

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