1595513 - webRequest.onBeforeRequest with 'requestBody' causes multipart POSTs with non-binary data > ~1MB to stall

Status: ASSIGNED

(WebExtensions :: Request Handling, defect, P2)

Description

[Giorgio Maone [:ma1]]

Attachment: Minimal reproducible test case

+++ This bug was initially created as a clone of Bug #1532530 +++

User Agent:Mozilla/5.0 (X11; Linux x86_64; rv:71.0) Gecko/20100101 Firefox/71.0
Version: 71.0b8
Build ID: 20191107101713

Steps to reproduce:

1. Install an empty webRequest.onBeforeUpload listener with requestBody option (see the webRequest_requestBody/web-ext-artifacts/webrequest_requestbody_bug_non_binary_big_uploads-1.xpi extension in the attached zip)
2. Attempt a multipart form submission whose non-binary (non file) data amounts to more than 1MB (e.g. by running the server.js NodeJS test server in the attached zip and browsing it at https://localhost:5000 )

Actual results:

The submission stalls and never completes.
On Trunk (build ID 20191111100226) the tab usually crashes even without any extension installed, probably because a different (but likely related) IPL bug, see https://crash-stats.mozilla.org/report/index/9675a718-8e79-4937-8959-db1780191111.

Expected results:

The submission should complete normally.

Comment 1

[Kris Maglione [:kmag]]

(In reply to Giorgio Maone [:mao] from comment #0)

On Trunk (build ID 20191111100226) the tab usually crashes even without any extension installed, probably because a different (but likely related) IPL bug, see https://crash-stats.mozilla.org/report/index/9675a718-8e79-4937-8959-db1780191111.

Please file a necko bug for this.

Comment 2

[Rob Wu [:robwu]]

I'll look at this bug in two weeks. Meanwhile, could you answer the following questions?

1. Is this bug consistently reproducible with the given STR?
2. Is this a regression?