POST data with a file upload

[Christopher Jursa]

Hello,

I am attempting to make a POST request to another servlet with a file upload. I have the code below but it is not working properly. I posted this in the servlet forum as I am trying to use one servlet to contact another.

I think all but the file writing is ok. The other data being written are all string fields and should be correct.

The service that I am posting to works fine. I have tested it independently with success. However, I can't seem to send the file and other through this code.

I actually don't need to pass the file. I have code that reads the file into a variable that can be passed.

However, I need to emulate the multipart form. How do I emulate the multipart form.

Can anyone verify that I am doing this correctly?

   
//begin fetchURL
  public String fetchHTML(String urlArg, String filePathArg, String emailArg, String swissProtIDArg, String seqArg, String notesArg)
  {   
  // this routine works around character set changes -- not clear how it does it.
    StringBuffer returnStringBuffer = new StringBuffer();
    
    //try to connect to the url
    try
    { 
  //connect to the URL & write post data
      URL myUrl = new URL (urlArg);
      URLConnection urlConn = myUrl.openConnection();
      urlConn.setDoOutput(true);
      urlConn.setRequestProperty("Content-Type", "multipart/form-data");
      OutputStreamWriter myOutputStreamWriter = new OutputStreamWriter(urlConn.getOutputStream());
      String keyValuePairs = URLEncoder.encode("email", "UTF-8") + "=" + URLEncoder.encode(emailArg, "UTF-8") +
      "&" + URLEncoder.encode("swissProtID", "UTF-8") + "=" + URLEncoder.encode(swissProtIDArg, "UTF-8") +
      "&" + URLEncoder.encode("seq", "UTF-8") + "=" + URLEncoder.encode(seqArg, "UTF-8") +
      "&" + URLEncoder.encode("notes", "UTF-8") + "=" + URLEncoder.encode(notesArg, "UTF-8");
      myOutputStreamWriter.write(keyValuePairs);
      myOutputStreamWriter.flush();
      
      //get the content from the URL                
      //read each line from the reader and write to the writer
      BufferedReader myBufferedReader = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
      String oneLine = "";
      while ((oneLine = myBufferedReader.readLine()) != null) { returnStringBuffer.append(oneLine); }
      myBufferedReader.close(); 
    }
    catch (Exception e) 
    { 
  StringWriter myStringWriter = new StringWriter();
PrintWriter myPrintWriter = new PrintWriter(myStringWriter);
e.printStackTrace(myPrintWriter);
returnStringBuffer.append(myStringWriter.toString()); 
    }
    
    return returnStringBuffer.toString();
 
  }
 

[ November 22, 2006: Message edited by: Christopher Jursa ]
[ November 22, 2006: Message edited by: Christopher Jursa ]

[Christopher Jursa]

I should add, the exception thrown by the servlet I am trying to contact is "Posted content type isn't multipart/form-data".