1294661 - Detect type even when mime type is incorrect (in case of pdf, odt, xls....)

Status: RESOLVED WONTFIX

(Firefox :: File Handling, defect, P3)

Description

[Pierre Couderc]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0
Build ID: 20160802213348

Steps to reproduce:

Open

http://secli.cef.fr/images/imagesFCK/file/4_actualites/infos_pratiques/RELANCE20152016/Seclidepliantpresentation.pdf



Actual results:

Today, this pdf is not detected (because mime type is incorrect : application/octet-stream)


Expected results:

Detect it is .pdf anyway ! Ok it is a non conforming site but I want to open it anyway.
At minimum, use the extension to propose .pdf viewer (today, it prposes me vim!).
The same for .odt, .xls,...

Comment 1

[Michelle Funches - QA]

Reproducible
Version 	48.0
Build ID 	20160726073904
User Agent 	Mozilla/5.0 (X11; Linux i686; rv:48.0) Gecko/20100101 Firefox/48.0

Comment 2

[William Hsu [:whsu]]

This seems to be a feature request.

Server responses the incorrect header, and it causes this problem. Attach the header.
As reporter mentioned, server responses "Content-Type: application/octet-stream"
---------------------------------------------
Cache-Control: must-revalidate
Connection: Keep-Alive
Content-Description: File Transfer
Content-Disposition: attachment; filename=Seclidepliantpresentation.pdf
Content-Language: fr
Content-Length: 217246
Content-Type: application/octet-stream
Date: Fri, 19 Aug 2016 09:01:54 GMT
Expires: 0
Keep-Alive: timeout=15, max=99
Pragma: public
Server: Apache
content-transfer-encoding: binary
---------------------------------------------

Set priority to P3.
Add it to product backlog.

Comment 3

[Pierre Couderc]

Yes, it is an incorrect header from the server.
And yes, it is a feature request and not a true firefox bug.
But it is a very common problem and very frustrating.

Comment 4

[William Hsu [:whsu]]

Dupe of Bug 1297912?

Comment 5

[William Hsu [:whsu]]

(In reply to William Hsu [:whsu] from comment #4)
> Dupe of Bug 1297912?

My bad. Spoke too quickly.
It seems to me that it's duplicate of Bug 306471.

Comment 6

[Masatoshi Kimura [:emk]]

IE used to be very lenient to mime types and it caused many security holes.
We should not disregard mime types beyond what is defined in the mimesinff spec.