1159274 - [ServiceWorkers] Cannot perform cors request from a SW in B2G

Status: RESOLVED WORKSFORME

(Core :: DOM: Workers, defect)

Description

[Francisco Jordano [:arcturus] [:francisco]]

In a serviceworker when doing fetch to a domain that has CORS enabled, we are not able to get the response in B2G. We do get the response in FF Nightly.

An example to illustrate this:
https://github.com/lodr/v3-app/tree/nightly

Comment 1

[Francisco Jordano [:arcturus] [:francisco]]

ni ferjm since he wanted to take a look.

Comment 2

[Josh Matthews [:jdm]]

Could you be more specific about the requests that are failing?

Comment 3

[Noemí Freire (:noemi)]

Per comment2 setting ni to Francisco. Thanks!

Comment 4

[Francisco Jordano [:arcturus] [:francisco]]

(In reply to Josh Matthews [:jdm] from comment #2)
> Could you be more specific about the requests that are failing?

Hi Josh,

Here is an example that runs in a SW when attending a fetch event:

var cors = 'http://crossorigin.me/';
return fetch(cors + 'http://example.com');

In this case 'crossorigin.me' is a service that proxy an url allowing cors for any request.

When doing that operation on the sw we can see in the console:
[JavaScript Warning: "Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://crossorigin.me/http://example.com (Reason: CORS request failed)."]

Comment 5

[Andrew Overholt [:overholt]]

Josh, see comment 4.

Comment 6

[José Antonio Olivera Ortega [:jaoo]]

I gave this a try and fetch calls are working fine on the service worker execution context (fetch event handler) even when using the CORS proxy. On the other hand XHR requests on the client context get the warning at comment 4. To see this working on b2g use the secure CORS proxy at 'https://crossorigin.me/'.

Comment 7

[Francisco Jordano [:arcturus] [:francisco]]

Retested following comments :jaoo provided and closing as worksforme.

Thanks folks.