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 Chrome 59 and higher skips the Edge 17 skips the script-src (en-US) directive (bug). |
Syntax
One or more sources can be allowed for the worker-src
policy:
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:
Content-Security-Policy: worker-src https://example.com/
Worker
, SharedWorker
, ServiceWorker
are blocked and won't load:
<script>
var 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 | Status | Comment |
---|---|---|
Content Security Policy Level 3 worker-src |
Working Draft | Initial definition. |
Browser compatibility
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