REST API: Allow media edit endpoint to find remote files

[jonsurrell]

The media edit endpoint introduced in https://core.trac.wordpress.org/changeset/48291 fails to find files that are not on the local file system, for example when using some file replication plugins.

Use _load_image_to_edit_path to find remote images.

This is very similar to the approach currently in use in several places already, e.g.
https://core.trac.wordpress.org/browser/trunk/src/wp-admin/includes/image.php?rev=47461#L33

This fixes the issue described in ​https://github.com/WordPress/gutenberg/issues/23686.

[johnbillion]

Thanks for the report @jonsurrell . Moving this to 5.5 for visibility.

The media edit endpoint introduced in https://core.trac.wordpress.org/changeset/48291 fails to find files that are not on the local file system, for example when using some file replication plugins.

Use _load_image_to_edit_path to find remote images.

This is very similar to the approach currently in use in several places already, e.g.
https://core.trac.wordpress.org/browser/trunk/src/wp-admin/includes/image.php?rev=47461#L33

This fixes the issue described in ​https://github.com/WordPress/gutenberg/issues/23686.

Trac ticket: https://core.trac.wordpress.org/ticket/50595

[azaozz]

Patch looks good. May also need to update _load_image_to_edit_path() to look for the original_image (when specified), but that can also be handled through the filters.

[azaozz]

In 48386:

Media, REST API: Allow media edit endpoint to find remote files.

Props jonsurrell.
Fixes #50595.

Merged.