[wp-trac] [WordPress Trac] #34354: Embeds endpoint not working after switching permalinks

[WordPress Trac]

#34354: Embeds endpoint not working after switching permalinks
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 Reporter:  pbearne       |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Embeds        |     Version:  trunk
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by swissspidy):

 > I just set the permalinks back to the default /?p=1219 format and the
 iframes is still pointing to the /eb/embed/ URL so we get the fall
 through.

 That's because oEmbed responses ( the `<iframe>` embed code) are cached.
 WordPress doesn't know if an embed code is for your own site and therefore
 can't change it. Besides that, none of your pretty permalinks will work
 when you switch back to ugly permalinks. That is not limited to embeds.

 Since oEmbed responses are cached, invalid responses won't suddenly begin
 to work. You'd need to clear the oEmbed cache during development, e.g. by
 using `WP_Embed::delete_oembed_caches()` or by deleting the rows manually
 from postmeta tables.

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Ticket URL: <https://core.trac.wordpress.org/ticket/34354#comment:2>
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