Posts not uploading to Facebook when plugin activated

Hello,

I checked the above link with the FB debugger tool.

1) The first time I checked it, for some weird reason, the canonical URL of the post was different than the actual url. This is a serious issue (and I think this was the real reason the post didn’t make it to your timeline), but Add-Meta-Tags has nothing to do with it. The above messages are not errors but warnings. One thing I will investigate is whether the current order of the OG metatags is the cause of some of the warnings above.

2) Now that I check the post again with the debugger tool, the canonical url seems ok. One problem I see is the empty image width and height properties, which should not be generated if they are empty. It will be fixed in the next release. May I ask how these images have been attached to the post? WordPress should always save their width and height.

More feedback about using Jetpack with Add-Meta-Tags would be much appreciated from other users as well.

1) Filed a bug report to clean those args from the image urls.

2) I asked about how the images have been attached in order to find an explanation about the missing width and height attributes. The images seem to be hosted to an external server or CDN (http://i2.wp.com/www.rubben.be/articles/wp-content/uploads/…). This is not a problem.

3) AFAIK the FB debugger tool should list the last three canonical urls (please check at the bottom of the page).

I will investigate whether the order of the OG metatags can introduce any such issues with sharing and fix it in the next release.

As a temporary workaround in order to remove the og:image:width and og:image:height tags, can you add the following code to your theme’s functions.php file?

function amt_filter_og_tags( $tag ) {
    if ( strpos($tag, 'og:image:width') > 0 ) {
        return false;
    } elseif ( strpos($tag, 'og:image:height') > 0 ) {
        return false;
    }
    return true;
}

function amt_workaround_og_tags( $metatags ) {
    // Remove og:image:width & og:image:height OG metatags
    $metatags = array_filter($metatags, "amt_filter_og_tags");
    return $metatags;
}
add_filter( 'amt_opengraph_metadata_head', 'amt_workaround_og_tags', 10, 1 );

Please let me know if jetpack auto-posting to FB works.

Checking the FB debugger tool yesterday I noticed that it displayed error messages (not always, but some of the times) about the image width and height tags being empty. All the other messages were just warnings, not errors, so I doubt the problem was caused by those issues.

For instance, the warnings about the twitter card meta tags is an issue that cannot be resolved, unless twitter-card generation is disabled in the plugin settings. The FB debugger tool does not support/understand them, so it will always going to display warnings about them.

The rest of the warning messages maybe due to the order the OG meta tags are generated by the plugin. I will investigate it and fix it if necessary in future releases.

The above workaround is temporary, until I add some checks in the code so that meta tags containing empty width/height image attributes are not generated.

Regardless of the location from which the images are served, the image width/height attributes should be stored to the WP database as soon as the image is uploaded to WordPress. In other words, they should never be empty. I suspect that Jetpack or some other plugin possibly interferes with this process and the issue should be reported to the developers of the those plugins.

Regarding the workaround, I’d recommend testing it for a longer time just to make sure it works properly for now. Your feedback is always welcome and much appreciated.

George

Hi,

The recommended workaround regarding empty width/height image meta tags is to add the following code in the functions.php file:

function amt_generate_extended_image_tags( $default ) {
    return false;
}
add_filter( 'amt_extended_image_tags', 'amt_generate_extended_image_tags', 10, 1 );

This also exists in ‘Example 7’ on the plugin description page. It makes the plugin generate compact image meta tags suppressing width, height and type meta tags.

Thanks for letting me know.