[wp-trac] [WordPress Trac] #27536: AJAX call returns all page errors along with plugin's response

Thu Mar 27 00:39:56 UTC 2014

#27536: AJAX call returns all page errors along with plugin's response
------------------------------+-------------------------
 Reporter:  Justin Folvarcik  |       Owner:
     Type:  defect (bug)      |      Status:  closed
 Priority:  normal            |   Milestone:
Component:  General           |     Version:  3.8.1
 Severity:  normal            |  Resolution:  invalid
 Keywords:                    |     Focuses:  javascript
------------------------------+-------------------------
Description changed by SergeyBiryukov:

Old description:

> I'm working on a plugin which uses AJAX to get the titles of a page from
> a user-given URL. Everything works fine... until I get to the server's
> response.
> {{{
> function t3_set_handlers(){
>     var input = jQuery('[id^=post-source], [id^=post-via]');
>     input.each(function(){
>         jQuery(this).on('change', function(){
>
>             var data = {
>                 action:'t3_get_url_title',
>                 url:jQuery(this).val()
>             };
>             var currentbox = jQuery(this);
>             jQuery.post(ajaxurl, data, function(response, status, xhr){
>                 xhr.done(function(){
>                     console.log(response);
>                     //var name = jQuery().attribute('id').split('-');
> //jQuery('#post-'+name[1]+'-title-'+name[2]).val(title);
>                 }).fail(function(){
>                     // Something went wrong, so we'll turn off the AJAX
> and let the user know.
>                     alert('AJAX error encountered! Failed to retrieve
> title. If this problem persists, please send an' +
>                         'email to justin at zeldawiki.org describing the
> issue.');
>                     input.off();
>                 });
>             });
>         });
>     });
> }
> jQuery(t3_set_handlers());
> }}}
>
> In this code, the response variable should contain what the server sent
> back (IE: my current debug value, a JSON type string which is simply
> { "name":"value" }
>
> However, this is what I'm seeing in my console right now.
> <br />
> <b>Warning</b>:  copy(/var/www/html/temple3/wp-content/ewww/jpegtran):
> failed to open stream: Permission denied in <b>/var/www/html/temple3/wp-
> content/plugins/ewww-image-optimizer/ewww-image-optimizer.php</b> on line
> <b>753</b><br />
> <br />
> <b>Warning</b>:  copy(/var/www/html/temple3/wp-content/ewww/jpegtran-
> custom): failed to open stream: Permission denied in
> <b>/var/www/html/temple3/wp-content/plugins/ewww-image-optimizer/ewww-
> image-optimizer.php</b> on line <b>766</b><br />
> <br />
> <b>Warning</b>:  fileperms(): stat failed for /var/www/html/temple3/wp-
> content/ewww/jpegtran-custom in <b>/var/www/html/temple3/wp-
> content/plugins/ewww-image-optimizer/ewww-image-optimizer.php</b> on line
> <b>770</b><br />
> <br />
> <b>Warning</b>:  chmod(): No such file or directory in
> <b>/var/www/html/temple3/wp-content/plugins/ewww-image-optimizer/ewww-
> image-optimizer.php</b> on line <b>773</b><br />
> <br />
> <b>Warning</b>:  copy(/var/www/html/temple3/wp-content/ewww/gifsicle):
> failed to open stream: Permission denied in <b>/var/www/html/temple3/wp-
> content/plugins/ewww-image-optimizer/ewww-image-optimizer.php</b> on line
> <b>787</b><br />
> <br />
> <b>Warning</b>:  copy(/var/www/html/temple3/wp-content/ewww/optipng):
> failed to open stream: Permission denied in <b>/var/www/html/temple3/wp-
> content/plugins/ewww-image-optimizer/ewww-image-optimizer.php</b> on line
> <b>800</b><br />
> <br />
> <b>Warning</b>:  copy(/var/www/html/temple3/wp-content/ewww/pngquant):
> failed to open stream: Permission denied in <b>/var/www/html/temple3/wp-
> content/plugins/ewww-image-optimizer/ewww-image-optimizer.php</b> on line
> <b>813</b><br />
> <div id='ewww-image-optimizer-warning-tool-install'
> class='error'><p><strong>EWWW Image Optimizer could not install tools in
> /var/www/html/temple3/wp-content/ewww/.</strong> Please adjust
> permissions or create the folder. If you have installed the tools
> elsewhere on your system, check the option to Use System Paths. For more
> details, visit the <a href='options-general.php?page=ewww-image-optimizer
> /ewww-image-optimizer.php'>Settings Page</a> or the <a
> href='http://wordpress.org/extend/plugins/ewww-image-
> optimizer/installation/'>Installation
> Instructions</a>.</p></div>.{"name":"value"}
>
> I'm not saying these errors are bugs. I know what they're from, but what
> I do NOT understand is why these are being outputted along with my
> response. According to all the documentation I've seen and the other
> people I've spoken with, my code is correct. I'll even provide the PHP:
>
> {{{
> function t3_get_url_title(){
>     if(is_admin()){
>         echo json_encode(array('name' => 'value'));
>         die();
>     }
> }
> }}}
>
> The only logical reason I can come up with for this is that WordPress is
> doing something it shouldn't be. Or maybe everything I've heard and read
> is wrong and you can tell me why. I am submitting this as a bug report
> because I truly believe this is a bug. I have spoken with other
> developers, checked my code against the documentation and even other,
> working code examples. My syntax should be correct.
>
> I would appreciate it if either this issue could be investigated or
> someone can tell me why I'm stupid and can't get this to work. Thanks in
> advance.

New description:

 I'm working on a plugin which uses AJAX to get the titles of a page from a
 user-given URL. Everything works fine... until I get to the server's
 response.
 {{{
 function t3_set_handlers(){
     var input = jQuery('[id^=post-source], [id^=post-via]');
     input.each(function(){
         jQuery(this).on('change', function(){

             var data = {
                 action:'t3_get_url_title',
                 url:jQuery(this).val()
             };
             var currentbox = jQuery(this);
             jQuery.post(ajaxurl, data, function(response, status, xhr){
                 xhr.done(function(){
                     console.log(response);
                     //var name = jQuery().attribute('id').split('-');
 //jQuery('#post-'+name[1]+'-title-'+name[2]).val(title);
                 }).fail(function(){
                     // Something went wrong, so we'll turn off the AJAX
 and let the user know.
                     alert('AJAX error encountered! Failed to retrieve
 title. If this problem persists, please send an' +
                         'email to justin at zeldawiki.org describing the
 issue.');
                     input.off();
                 });
             });
         });
     });
 }
 jQuery(t3_set_handlers());
 }}}

 In this code, the response variable should contain what the server sent
 back (IE: my current debug value, a JSON type string which is simply
 {{{
 { "name":"value" }
 }}}

However, this is what I'm seeing in my console right now.
 {{{
 
 Warning: copy(/var/www/html/temple3/wp-content/ewww/jpegtran):
 failed to open stream: Permission denied in /var/www/html/temple3/wp-
 content/plugins/ewww-image-optimizer/ewww-image-optimizer.php on line
 753 
 
 Warning: copy(/var/www/html/temple3/wp-content/ewww/jpegtran-
 custom): failed to open stream: Permission denied in
 /var/www/html/temple3/wp-content/plugins/ewww-image-optimizer/ewww-
 image-optimizer.php on line 766 
 
 Warning: fileperms(): stat failed for /var/www/html/temple3/wp-
 content/ewww/jpegtran-custom in /var/www/html/temple3/wp-
 content/plugins/ewww-image-optimizer/ewww-image-optimizer.php on line
 770 
 
 Warning: chmod(): No such file or directory in
 /var/www/html/temple3/wp-content/plugins/ewww-image-optimizer/ewww-
 image-optimizer.php on line 773 
 
 Warning: copy(/var/www/html/temple3/wp-content/ewww/gifsicle):
 failed to open stream: Permission denied in /var/www/html/temple3/wp-
 content/plugins/ewww-image-optimizer/ewww-image-optimizer.php on line
 787 
 
 Warning: copy(/var/www/html/temple3/wp-content/ewww/optipng):
 failed to open stream: Permission denied in /var/www/html/temple3/wp-
 content/plugins/ewww-image-optimizer/ewww-image-optimizer.php on line
 800 
 
 Warning: copy(/var/www/html/temple3/wp-content/ewww/pngquant):
 failed to open stream: Permission denied in /var/www/html/temple3/wp-
 content/plugins/ewww-image-optimizer/ewww-image-optimizer.php on line
 813 
 <div id='ewww-image-optimizer-warning-tool-install'
 class='error'>EWWW Image Optimizer could not install tools in
 /var/www/html/temple3/wp-content/ewww/. Please adjust permissions
 or create the folder. If you have installed the tools elsewhere on your
 system, check the option to Use System Paths. For more details, visit the
 <a href='options-general.php?page=ewww-image-optimizer/ewww-image-
 optimizer.php'>Settings Page</a> or the <a
 href='http://wordpress.org/extend/plugins/ewww-image-
 optimizer/installation/'>Installation
 Instructions</a>.</div>.{"name":"value"}
 }}}
 I'm not saying these errors are bugs. I know what they're from, but what I
 do NOT understand is why these are being outputted along with my response.
 According to all the documentation I've seen and the other people I've
 spoken with, my code is correct. I'll even provide the PHP:

 {{{
 function t3_get_url_title(){
     if(is_admin()){
         echo json_encode(array('name' => 'value'));
         die();
     }
 }
 }}}

 The only logical reason I can come up with for this is that WordPress is
 doing something it shouldn't be. Or maybe everything I've heard and read
 is wrong and you can tell me why. I am submitting this as a bug report
 because I truly believe this is a bug. I have spoken with other
 developers, checked my code against the documentation and even other,
 working code examples. My syntax should be correct.

 I would appreciate it if either this issue could be investigated or
 someone can tell me why I'm stupid and can't get this to work. Thanks in
 advance.

--

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Ticket URL: <https://core.trac.wordpress.org/ticket/27536#comment:8>
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