CSP: worker-src
The HTTP Content-Security-Policy
(CSP)
worker-src
directive specifies valid sources for
Worker
, SharedWorker
, or ServiceWorker
scripts.
CSP version | 3 |
---|---|
Directive type | Fetch directive |
Fallback |
If this directive is absent, the user agent will first look for the
|
Syntax
One or more sources can be allowed for the worker-src
policy:
http
Content-Security-Policy: worker-src <source>;
Content-Security-Policy: worker-src <source> <source>;
Sources
<source>
can be any one of the values listed in CSP Source Values.
Note that this same set of values can be used in all fetch directives (and a number of other directives).
Examples
Violation cases
Given this CSP header:
http
Content-Security-Policy: worker-src https://example.com/
Worker
, SharedWorker
, ServiceWorker
are
blocked and won't load:
html
<script>
let blockedWorker = new Worker("data:application/javascript,…");
blockedWorker = new SharedWorker("https://not-example.com/");
navigator.serviceWorker.register("https://not-example.com/sw.js");
</script>
Specifications
Specification |
---|
Content Security Policy Level 3 # directive-worker-src |
Browser compatibility
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