I cannot upload a file.

Lanuyanger

The error message I receive is AJAX Request Failed
textStatus=error, errorThrown=Internal Server Error

Lanuyanger

/*
// jQuery Ajax File Uploader
//
// @author: Jordan Feldstein <jfeldstein.com>
//
// - Ajaxifies an individual <input type="file">
// - Files are sandboxed. Doesn't matter how many, or where they are, on the page.
// - Allows for extra parameters to be included with the file
// - onStart callback can cancel the upload by returning false
*/

(function($) {
$.fn.ajaxfileupload = function(options) {
var settings = {
params: {},
action: '',
onStart: function() { },
onComplete: function(response) { },
onCancel: function() { },
validate_extensions : true,
valid_extensions : ['gif','png','jpg','jpeg'],
submit_button : null
};

    var uploading_file = false;

    if ( options ) { 
      $.extend( settings, options );
    }


    // 'this' is a jQuery collection of one or more (hopefully) 
    //  file elements, but doesn't check for this yet
    return this.each(function() {
      var $element = $(this);

      // Skip elements that are already setup. May replace this 
      //  with uninit() later, to allow updating that settings
      if($element.data('ajaxUploader-setup') === true) return;

      $element.change(function()
      {
        // since a new image was selected, reset the marker
        uploading_file = false;

        // only update the file from here if we haven't assigned a submit button
        if (settings.submit_button == null)
        {
          upload_file();
        }
      });

      if (settings.submit_button == null)
      {
        // do nothing
      } else
      {
        settings.submit_button.click(function(e)
        {
          // Prevent non-AJAXy submit
          e.preventDefault();

          // only attempt to upload file if we're not uploading
          if (!uploading_file)
          {
            upload_file();
          }
        });
      }

      var upload_file = function()
      {
        if($element.val() == '') return settings.onCancel.apply($element, [settings.params]);

        // make sure extension is valid
        var ext = $element.val().split('.').pop().toLowerCase();
        if(true === settings.validate_extensions && $.inArray(ext, settings.valid_extensions) == -1)
        {
          // Pass back to the user
          settings.onComplete.apply($element, [{status: false, message: 'The select file type is invalid. File must be ' + settings.valid_extensions.join(', ') + '.'}, settings.params]);
        } else
        { 
          uploading_file = true;

          // Creates the form, extra inputs and iframe used to 
          //  submit / upload the file
          wrapElement($element);

          // Call user-supplied (or default) onStart(), setting
          //  it's this context to the file DOM element
          var ret = settings.onStart.apply($element, [settings.params]);

          // let onStart have the option to cancel the upload
          if(ret !== false)
          {
            $element.parent('form').submit(function(e) { e.stopPropagation(); }).submit();
          } else {
            uploading_file = false;
          }
        }
      };

      // Mark this element as setup
      $element.data('ajaxUploader-setup', true);

      /*
      // Internal handler that tries to parse the response 
      //  and clean up after ourselves. 
      */
      var handleResponse = function(loadedFrame, element) {
        var response, responseStr = $(loadedFrame).contents().text();
        try {
          //response = $.parseJSON($.trim(responseStr));
          response = JSON.parse(responseStr);
        } catch(e) {
          response = responseStr;
        }

        // Tear-down the wrapper form
        element.siblings().remove();
        element.unwrap();

        uploading_file = false;

        // Pass back to the user
        settings.onComplete.apply(element, [response, settings.params]);
      };

      /*
      // Wraps element in a <form> tag, and inserts hidden inputs for each
      //  key:value pair in settings.params so they can be sent along with
      //  the upload. Then, creates an iframe that the whole thing is 
      //  uploaded through. 
      */
      var wrapElement = function(element) {
        // Create an iframe to submit through, using a semi-unique ID
        var frame_id = 'ajaxUploader-iframe-' + Math.round(new Date().getTime() / 1000)
        $('body').after('<iframe width="0" height="0" style="display:none;" name="'+frame_id+'" id="'+frame_id+'"/>');
        $('#'+frame_id).get(0).onload = function() {
          handleResponse(this, element);
        };

        // Wrap it in a form
        element.wrap(function() {
          return '<form action="' + settings.action + '" method="POST" enctype="multipart/form-data" target="'+frame_id+'" />'
        })
        // Insert <input type='hidden'>'s for each param
        .before(function() {
          var key, html = '';
          for(key in settings.params) {
            var paramVal = settings.params[key];
            if (typeof paramVal === 'function') {
              paramVal = paramVal();
            }
            html += '<input type="hidden" name="' + key + '" value="' + paramVal + '" />';
          }
          return html;
        });
      }
    });
  }

})( jQuery )