1289776 - Firefox does not render image in some cases

Status: RESOLVED INVALID

(Core :: Networking: HTTP, defect)

Description

[ltrifoi]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.106 Safari/537.36

Steps to reproduce:

Step 1) Host a webpage on a web-server (I used a tomcat 8 server). Let's say this webpage is accessible on http://domain-a.com.
On this webpage put a <img src="http://domain-b.com:8080/ws-api/v1/workflows/1003/image?token=497633086">

Step 2) Host a rest service on domain-b.com that returns a PNG image for the above url (http://domain-b.com:8080/ws-api/v1/workflows/1003/image?token=497633086)

Step 3) Setup CORS such that domain-b.com allows request from domain-a.com

Step 4) Access the above webpage using Firefox 47 or later.

Important Notes: The same scenario works perfectly in Firefox 45 ESR, Chrome 51, IE 11 but not in Firefox 47 or later.

The exact headers exchanged are below:

Request Headers:
Host: 10.111.17.152:8091
User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:50.0) Gecko/20100101 Firefox/50.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://10.111.17.152:8090/ws-web/projects/1379/tasks
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache

Response Headers:
Access-Control-Allow-Headers: accept, content-type, token, cache-control, x-requested-with
Access-Control-Allow-Methods: POST, GET, OPTIONS, DELETE, PUT, PATCH, OPTIONS
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Content-Type: image/png;charset=utf-8
Date: Wed, 27 Jul 2016 13:30:09 GMT
Server: Apache-Coyote/1.1
Transfer-Encoding: chunked
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1

From my investigations FFOX 47 sends a "Accept: */*" request header for the above <img src=..." instead of an "Accept: "image/png, */*, ...." header that is sent by FFOX 45. 

If I manually change the request header to "image/png" in the FFox inspector, network tab, using "edit and resend" button then the request is done correctly. 


Actual results:

The image is not rendered.


Expected results:

Image is rendered correctly.

Comment 1

[Matthias Versen [:Matti]]

The Accept header change seems to be a result of bug 1249474

Comment 2

[Mike Taylor [:miketaylr]]

Hi ltrifoi, it sounds like your server is misconfigured. It should be able to respond with an "image/png" asset when the Accept header is "*/*".

Comment 3

[Patrick McManus [:mcmanus]]

Hey Mike - I thought OP was saying that it did respond with an image, we just didn't render it. At least the response header in comment 0 has a image content-type

Comment 4

[Mike Taylor [:miketaylr]]

Oh, hmm. I missed that.

ltrifoi, can you confirm that an image is sent but it's just not rendered in the case of sending "*/*"? A screenshot of the network panel of the devtools would be helpful as well (or a public link to a server) -- thanks!

See https://developer.mozilla.org/en-US/docs/Tools/Network_Monitor

Comment 5

[ltrifoi]

Yes, I confirm that the image is sent but it's just not rendered.

Comment 6

[ltrifoi]

Actually, let me double check that and I'll also attach the network panel screenshots :)

Comment 7

[ltrifoi]

I've double checked. Indeed it was a server misconfiguration. Sorry for wasting your time.

Comment 8

[Valentin Gosu [:valentin] (he/him)]

Thanks for filing the bug. Even if it turns out to be nothing, it's better to make sure :)

Comment 9

[Mike Taylor [:miketaylr]]

No worries, thanks for the report!