Bug 256774

Summary:	Web Manifest: fetching should enforce mime type
Product:	WebKit	Reporter:	Marcos Caceres <marcosc>
Component:	WebKit Misc.	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	marcosc, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	Safari 16
Hardware:	Unspecified
OS:	Unspecified

Description Marcos Caceres 2023-05-14 19:57:20 PDT

According to HTML, when a web manifest is fetched, it should enforce the "JSON MIME type" type:
https://html.spec.whatwg.org/#link-type-manifest

Specifically: 

> To process this type of linked resource given a link element el, boolean success, response response, and byte sequence bodyBytes:

>  If response's Content-Type metadata is not a JSON MIME type, then set success to false.

Where:
A JSON MIME type is any MIME type whose subtype ends in "+json" or whose essence is "application/json" or "text/json".

Comment 1 Radar WebKit Bug Importer 2023-05-21 19:58:20 PDT

<rdar://problem/109638803>