Retrieve the upload progress

http://mediamosa.org/content/retrieve-upload-progress-1

If you want to use the uploadprogress, your system must have apc or uploadprogress extension. We suggest apc.

You can check your system about existence of apc here:  http://your-mediamosa/admin/reports/status/php

 http://pecl.php.net/package/apc
APC (Alternative PHP Cache is a PECL extension of PHP) should be installed on the server where the users upload their files.

Your page should contains the following:

/**
  * Determine which upload progress implementation to use, if any available.
  */
function upload_progress_implementation() {
   static $implementation;
   if (!isset($implementation)) {
     if (extension_loaded('apc') && ini_get('apc.rfc1867')) {
       $implementation = 'apc';
     }
     else if (extension_loaded('uploadprogress')) {
       $implementation = 'uploadprogress';
     }
   }
   return $implementation;
}

... Your Drupal form should have:

   // Uploadprogress field.
   if ($implementation = upload_progress_implementation()) {
     $upload_progress_key = md5(mt_rand());
      if ($implementation == 'apc') {
       $form['APC_UPLOAD_PROGRESS'] = array('#type' => 'hidden', '#value' => $upload_progress_key);
     }
     else if ($implementation == 'uploadprogress') {
       $form['UPLOAD_IDENTIFIER'] = array('#type' => 'hidden', '#value' => $upload_progress_key);
     }
   }

The id (upload progress key) should be random. Don't use constant.

Then you can ask the /mediafile/uploadprogress [GET] REST call with id=$upload_progress_key .

If you don't want to use Drupal, this is the pure PHP / HTML version:

<input type="hidden" name="APC_UPLOAD_PROGRESS" id="progress_key" value="<?php echo $upload_progress_key?>" />

 http://pecl.php.net/bugs/bug.php?id=13583
According to the PECL ticket we should write the progress key before the file input. Eg.

<form action="http://upload.your-mediamosa/mediafile/upload?upload_ticket=xxx" enctype="multipart/form-data" method="POST">
   <input id="progress_key" type="hidden" name="APC_UPLOAD_PROGRESS" value="2685770" />
   <input class="FlesFileInput" type="file" value="" name="file" />
   <input type="hidden" value="http://your-wle/test.html" name="redirect_uri" />
   <input type="hidden" value="true" name="create_still" />
   <input type="submit" />
</form>