Meta report: https://meta.discourse.org/t/excessive-requests-to-uploads-lookup-urls-leading-to-429-response/143119
* The data-orig-src attribute was not being removed from cooked
video and audio so the composer was infinitely trying to get the
URLs for them, which would never resolve to anything
* Also the code that retrieved the short URL was unscoped, and was
getting everything on the page. if running from the composer we
now scope to the preview window
* Also fixed a minor issue where the element href for the video
and audio tags was not being set when the short URL was found
* DEV: Remove server global test variable
* Delete yarn-error.log
* prettier and some eslint fixes
* add global server variable back for plugins
* rename imported server to pretender
* prettier
* support plugin server. usage
* Export pretender as named
* Prettier
* change default pretender export
* fix bad import
* Use pretender() and original default export
* export new Pretender as default
* fix accidental change
* WIP testing
* add pretend handlers in correct location
* move more stuff into the correct pretender
* Consolidated more pretenders
* comment out another bad test
* fix user acceptance tests
* commented out bad test
* fixed another composer server stub
* fix more tests
* fixed tag test pretender
* Fix admin email test
* removed another draft handler
* add back test
* fix and uncomment another test
* remove test that is not useful
* remove commented out lines
* reapply handlers between every test
* no need to re-stub requests now :)
* cleanup from review
* more cleanup
For consistency this PR introduces using custom markdown and short upload:// URLs for video and audio uploads, rather than just treating them as links and relying on the oneboxer. The markdown syntax for videos is  and for audio it is .
This is achieved in discourse-markdown-it by modifying the rules for images in mardown-it via md.renderer.rules.image. We return HTML instead of the token when we encounter audio or video after | and the preview renders that HTML. Also when uploading an audio or video file we insert the relevant markdown into the composer.
Martin Brennan
Mark VanLandingham
Joffrey JAFFEUX
Guo Xiang Tan
Penar Musaraj