1553847 - Implement DOM.setFileInputFiles

Status: RESOLVED WONTFIX

(Remote Protocol :: CDP, enhancement, P5)

Description

[Alexandre Poirot [:ochameau]]

This is used by 3 gutenberg tests (search for uploadFile function usages) in order to attach a file to a <input type="file"/>.

Comment 1

[Andreas Tolfsen ❲:ato❳]

<input type=file>’s value is protected which means content frame
scripts, even with the system privilege, can’t update it. We should
however have access to mozSetFileArray.

See this code from Marionette how to do it:
https://searchfox.org/mozilla-central/rev/952521e6164ddffa3f34bc8cfa5a81afc5b859c4/testing/marionette/interaction.js#469-508

Comment 2

[Henrik Skupin [:whimboo][⌚️UTC+2] (away 02/17 - 02/21)]

Gutenberg tests for file uploads use a Puppeteer method which make use of this CDP endpoint. As such we need it for the alpha release.

Comment 3

[Andreas Tolfsen ❲:ato❳]

I need to look at bug 1526364 first.

Comment 4

[Maja Frydrychowicz :impossibus (was :maja_zf) (needinfo me)]

Given that this isn't used in gutenberg test setup, I think we can consider it relatively low priority.

Comment 5

[Marco Castelluccio [:marco]]

We are also using it in pdf.js: https://github.com/mozilla/pdf.js/pull/16650/files.

Comment 6

[Henrik Skupin [:whimboo][⌚️UTC+2] (away 02/17 - 02/21)]

Marco, there will be no more update here. Once Puppeteer is released with WebDriver BiDi support you should switch to the spec conforming protocol.

Comment 7

[Henrik Skupin [:whimboo][⌚️UTC+2] (away 02/17 - 02/21)]

We are not going to implement this API for CDP. For WebDriver BiDi there is bug 1855040.