How to post image from applet to php file?

[vleesboom]

I am writing an applet that can crop an image and upload it to the server.

I would like to post the image data to a .php file on the server using a form POST method.

How to do this?

I worked with HttpUrlConnections and DataOutputstreams, but I don't exactly know how to use it.

The following is the code I distilled from several posts. Yet, it is not finished:

String u = "[URL unfurl="true"]http://bla/bla.php";[/URL]
try {
  URL url = new URL(u);
  try {
    HttpURLConnection huc = (HttpURLConnection)url.openConnection();
    huc.setRequestMethod("POST");
    huc.setDoOutput(true);
    huc.setUseCaches(false);
    huc.setRequestProperty ("Content-Type", "application/x-[URL unfurl="true"]www-form-urlencoded");[/URL]
    huc.setRequestProperty ("Content-Length",new Integer(message.length()).toString());
    DataOutputStream dos = new DataOutputStream(huc.getOutputStream());
    dos.writeBytes(WHAT TO PUT HERE???);
    dos.flush();
    dos.close();
  
    huc.disconnect();
  }
  catch(IOException ioexception) {
    ioexception.printStackTrace();
  }
}
catch(MalformedURLException malformedurlexception) {
  malformedurlexception.printStackTrace();
}

Please help. I thank you in advance.

 

[sedj]

Where (and what type) is you image ? You need to encode your image into a byte[].

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[vleesboom]

Thanks for your quick reply.

The image I use is a JPEG file, that I loaded into the applet using getImage. Then I cropped the image and created the new (cropped) image using createImage.

The name of the cropped image is cropImage. I defined it elsewhere in my code.

How does that byte[] work?
And how does php know I posted a file (like the file upload form: $_FILES['cropImage']['tmp_name']?

 

[sedj]

I mean the class - what is the class name ? BufferedImage, PlanarImage, RenderedOp, RenderedImage ?

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[vleesboom]

The class is a BufferedImage

 

[sedj]

I haven't tried this code, but I think it should work OK.

BufferedImage bi ...

ByteArrayOutputStream baos = new ByteArrayOutputStream();
javax.imageio.ImageIO.write(bi, "jpeg", baos);

byte[] imageData = baos.toByteArray();

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