I have a plugin that works as a standard POST but not as an AJAX POST request.
I am getting a not a function error in Firebug with this function:
TypeError: jQuery(...).ajaxSubmit is not a function
jQuery(this).ajaxSubmit(options);
This magic came to the rescue: http://codeimpossible.com/2010/01/13/solving-document-ready-is-not-a-function-and-other-problems/
( function($) {
} ) ( jQuery );
This is the js file that it being enqueued with my plugin - it does load in the header:
jQuery(document).ready(function(){
var options = {
target: '#output', // target element(s) to be updated with server response
beforeSubmit: beforeSubmit, // pre-submit callback
success: afterSuccess, // post-submit callback
uploadProgress: OnProgress, //upload progress callback
resetForm: true // reset the form after successful submit
}
jQuery('#nanny_app_upload').on('submit', function(e) {
e.preventDefault();
alert('jQuery submit called');
jQuery(this).ajaxSubmit(options);
alert('jQuery post submit');
// always return false to prevent standard browser submit and page navigation
alert('Got this from the server: ' + response);
return false;
});
//function after succesful file upload (when server response)
function afterSuccess(){
alert('jQuery afterSuccess');
jQuery('#submit-btn').show(); //show submit button
jQuery('#loading-img').hide(); //hide loading button
jQuery('#progressbox').delay( 1000 ).fadeOut(); //hide progress bar
}
//function to check file size before uploading.
function beforeSubmit(){
alert('jQuery beforeSubmit');
jQuery('#submit-btn').hide(); //hide submit button
jQuery('#loading-img').show(); //show loading button
jQuery("#output").html("");
}
//progress bar function
function OnProgress(event, position, total, percentComplete)
{
//Progress bar
alert('jQuery OnProgress');
jQuery('#progressbox').show();
jQuery('#statustxt').show();
jQuery('#progressbar').width(percentComplete + '%') //update progressbar percent complete
jQuery('#statustxt').html(percentComplete + '%'); //update status text
if(percentComplete>50)
{
jQuery('#statustxt').css('color','#000'); //change status text to white after 50%
}
}
});
Here is the Form that is generated from a child theme:
//Nannie upload form
add_action("action_nannie_upload_form", "do_action_nannie_upload_form");
function do_action_nannie_upload_form()
{
$url = plugins_url();
$plugins_url = $url . "/nannie-app/";
?><br>
An Upload FORM!<br>
<form action="<?php echo admin_url('admin-ajax.php'); ?>"
method="post" enctype="multipart/form-data" id="nannie_app_upload">
<br>
<?php wp_nonce_field('nannie_app_upload','nannie_upload_ajax_nonce'); ?>
<!-- Add new File -->
<span class="btn btn-file">Select file:
<input name="FileInput" id="FileInput" type="file" /></span>
<button type="submit" class="btn" id="submit-btn">Upload</button>
</form>
<img src="<?php echo $plugins_url; ?>images/ajax-loader.gif" id="loading-img"
style="display:none;" alt="Please Wait"/>
<div id="progressbox" style="display:none;"><div id="progressbar"></div >
<div id="statustxt">0%</div></div>
<div id="output"></div>
<br>
<br>
<hr/>
<script src="<?php echo get_stylesheet_directory_uri(); ?>/plugins/form/jquery.form.js"></script>
<script src="<?php echo get_stylesheet_directory_uri(); ?>/plugins/uload/ajaxFileUpload.js"></script>
<?php
}
And here is the action that is called by the form submit. If I remove the check for AJAX headers it uploads the file and redirects me to a blank page.
add_action("wp_ajax_nopriv_nannie_app_upload", "nannie_app_upload");
function nannie_app_upload(){
global $wpdb;
if(isset($_FILES["FileInput"])){
log_me("nannie_app_upload: FileInput found");
if (!isset( $_POST['nannie_upload_ajax_nonce']) ||
!wp_verify_nonce($_POST['nannie_upload_ajax_nonce'], 'nannie_app_upload')){
print 'Sorry, your nonce did not verify.';
log_me("nannie_app_upload: nonce did not verify");
exit;
}
if (!isset($_SERVER['HTTP_X_REQUESTED_WITH'])){
if(isset($_SESSION["naap_app_uid"])){
$app_uid = $_SESSION["naap_app_uid"];
}
log_me('nannie_app_upload: AJAX Not Called #' . $app_uid);
die();
}
//Is file size is less than allowed size.
if ($_FILES["FileInput"]["size"] > 5242880) {
log_me('nannie_app_upload: File size is too big! #' . $app_uid);
die("File size is too big!");
}
$_SESSION["naap_app_uid"] = $app_uid;
$UploadDirectory = WP_PLUGIN_DIR."/nannie-app/tmp/" . $app_uid . "/";
////////////////////////////////////////////////////
//http://www.saaraan.com/2012/06/ajax-file-upload-with-php-and-jquery
if (!@file_exists($UploadDirectory)) {
//destination folder does not exist
if(!is_dir($UploadDirectory)) {
mkdir($UploadDirectory);
if (!@file_exists($UploadDirectory)) {
log_me('nannie_app_upload: Upload directory missing for AJAX upload #' . $app_uid);
die("Make sure Upload directory exist!");
}
}
}
//allowed file type Server side check
switch(strtolower($_FILES['FileInput']['type']))
{
//allowed file types
case 'image/png': //png file
case 'image/gif': //gif file
case 'image/jpeg': //jpeg file
case 'application/pdf': //PDF file
case 'application/msword': //ms word file
case 'application/vnd.ms-excel': //ms excel file
case 'application/x-zip-compressed': //zip file
case 'text/plain': //txt file
case 'text/html': //html file
//File Title will be used as new File name
$FileName = strtolower($_FILES['FileInput']['name']); //uploaded file name
$ImageExt = substr($FileName, strrpos($FileName, '.')); //file extension
$NewFileName = substr($FileName, 0, strrpos($FileName, '.') ); //file name before random
$FileType = $_FILES['FileInput']['type']; //file type
$FileSize = $_FILES['FileInput']["size"]; //file size
$RandNumber = rand(0, 9999999999); //Random number to make each filename unique.
$uploaded_date = date("Y-m-d H:i:s");
$NewFileName = preg_replace(array('/\s/', '/\.[\.]+/', '/[^\w_\.\-]/'), array('_', '.', ''), strtolower($NewFileName));
$NewFileName = $NewFileName.'_'.$RandNumber.$ImageExt;
//Rename and save uploded file to destination folder.
if(move_uploaded_file($_FILES['FileInput']["tmp_name"], $UploadDirectory . $NewFileName )){
//future SQL Insert to record the files uploaded - new table napp_applications_files
log_me('nannie_app_upload: Success Upload #' . $app_uid);
die('Success! File Uploaded.');
break;
}else{
log_me('nannie_app_upload: Failed Upload #' . $app_uid);
die('error uploading File!');
break;
}
break;
default:
log_me('nannie_app_upload: Unsupported Upload #' . $app_uid);
die('Unsupported File!'); //output error enforcing file types
break;
}
}else{
log_me('nannie_app_upload: Something wrong with upload! Is "upload_max_filesize" set correctly? #' . $app_uid);
die('Something wrong with upload! Is "upload_max_filesize" set correctly?');
}
}
