[wp-trac] [WordPress Trac] #40439: Save progress of intermediate image creation after upload

[WordPress Trac]

#40439: Save progress of intermediate image creation after upload
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 Reporter:  mikeschroder                         |       Owner:  (none)
     Type:  enhancement                          |      Status:  new
 Priority:  high                                 |   Milestone:  5.2
Component:  Media                                |     Version:
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch needs-testing needs-unit-  |     Focuses:  ui
  tests                                          |
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Comment (by joemcgill):

 From @azaozz via [https://core.trac.wordpress.org/ticket/43525#comment:1
 #43525]

 > Generate only one subsize on image upload, add meta for it and return
 "success". Then do another request (from PHP) and generate another.
 Continue until all subsizes are created.
 > On uploading first create the attachment post, then update the
 attachment meta after each image subsize is created. If the upload fails
 to create all subsizes, send another (AJAX) request from the browser to
 continue creating subsizes (we will need some UI for that).

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Ticket URL: <https://core.trac.wordpress.org/ticket/40439#comment:18>
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