594032 - Lack of progress events when sending FormData in XMLHttpRequest

Status: RESOLVED DUPLICATE of bug 311425

(Core :: DOM: Core & HTML, defect)

Description

[Andrés Pajarón]

User-Agent:       Mozilla/5.0 (Windows NT 5.1; rv:2.0b4) Gecko/20100818 Firefox/4.0b4 (.NET CLR 3.5.30729)
Build Identifier: Mozilla/5.0 (Windows NT 5.1; rv:2.0b4) Gecko/20100818 Firefox/4.0b4 (.NET CLR 3.5.30729)

When trying to upload a file as multipart/form-data (as explained here: http://hacks.mozilla.org/2010/07/firefox-4-formdata-and-the-new-file-url-object/ ), the progress event won't fire. Instead, we'll get directly a load event when finished.

Reproducible: Always

Steps to Reproduce:
Try to upload a file with attached code (needs server-side processing of the form).

Actual Results:  
Progress bar goes  directly from 0 to 100%

Expected Results:  
Progress bar actually shows progression of the upload.

It works fine on Chrome 6 and Safari 5.

Comment 1

[Andrés Pajarón]

Attachment: Example of sending file as form-data

Comment 2

[Jonas Sicking (:sicking) No longer reading bugmail consistently]

Olli, would you have time to look at this? I would have thought that the normal progress events could would have handled this just fine.

Comment 3

[Jonas Sicking (:sicking) No longer reading bugmail consistently]

Nominating for blocker, but needs confirmation before I'll marking blocking+

Comment 4

[Olli Pettay [:smaug][[e-mail]]]

My guess is that this has something to do with "@mozilla.org/io/multiplex-input-stream;1"

Comment 5

[Olli Pettay [:smaug][[e-mail]]]

Or not...

Comment 6

[Olli Pettay [:smaug][[e-mail]]]

Ah, this is a dup.
The progress event listener must be (unfortunately) set before calling open
(in Mozilla).