i now self-host an instance of #readeck and i've installed #httpShortcuts on my #android phone to share to it. works a treat!
luckilly i'd exported all my links from omnivore, and through some simple scripting i got them imported into readeck.
✍️ Add Link to Trello on Android via Share Menu
I have been collecting interesting links in various Trello boards for many years ... and now have found a new and better approach to share them from Android. Thank you @snarfed.org for giving me the initial ignition.
https://kiko.io/post/Add-Link-to-Trello-on-Android-via-Share-Menu/
Amazing how easy was to write an android app for sending files to #0x0 and then retrieving the link.
The answer is: you don't do it. You just use the excellent #httpshortcuts (from fdroid) with the URL (http://0x0.st), the method (POST) and the expected form data (parameter "file", the contents of the upload).
This creates a shortcut that you can select in the share menu of any app, and then you can share back the result URL to any other app.
Furthermore, you can use #javascript for customize further some parts of the process.