1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
---
title: 'CSP: worker-src'
slug: Web/HTTP/Headers/Content-Security-Policy/worker-src
translation_of: Web/HTTP/Headers/Content-Security-Policy/worker-src
---
<div>{{HTTPSidebar}}</div>
<p>The HTTP {{HTTPHeader("Content-Security-Policy")}} (CSP) <code><strong>worker-src</strong></code> directive specifies valid sources for {{domxref("Worker")}}, {{domxref("SharedWorker")}}, or {{domxref("ServiceWorker")}} scripts.</p>
<table class="properties">
<tbody>
<tr>
<th scope="row">CSP version</th>
<td>3</td>
</tr>
<tr>
<th scope="row">Directive type</th>
<td>{{Glossary("Fetch directive")}}</td>
</tr>
<tr>
<th scope="row">Fallback</th>
<td>
<p>If this directive is absent, the user agent will first look for the {{CSP("child-src")}} directive, then the {{CSP("script-src")}} directive, then finally for the {{CSP("default-src")}} directive, when governing worker execution.</p>
<p>Chrome 59 and higher skips the {{CSP("child-src")}} directive.</p>
<p>Edge 17 skips the {{CSP("script-src")}} directive (<a href="https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/17415478/">bug</a>).</p>
</td>
</tr>
</tbody>
</table>
<h2 id="Syntax">Syntax</h2>
<p>One or more sources can be allowed for the <code>worker-src</code> policy:</p>
<pre class="syntaxbox notranslate">Content-Security-Policy: worker-src <source>;
Content-Security-Policy: worker-src <source> <source>;
</pre>
<h3 id="Sources">Sources</h3>
<p>{{page("Web/HTTP/Headers/Content-Security-Policy/connect-src", "Sources")}}</p>
<h2 id="Examples">Examples</h2>
<h3 id="Violation_cases">Violation cases</h3>
<p>Given this CSP header:</p>
<pre class="brush: bash notranslate">Content-Security-Policy: worker-src https://example.com/</pre>
<p>{{domxref("Worker")}}, {{domxref("SharedWorker")}}, {{domxref("ServiceWorker")}} are blocked and won't load:</p>
<pre class="brush: html notranslate"><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></pre>
<h2 id="Specifications">Specifications</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{specName("CSP 3.0", "#directive-worker-src", "worker-src")}}</td>
<td>{{Spec2('CSP 3.0')}}</td>
<td>Initial definition.</td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility">Browser compatibility</h2>
<p>{{Compat("http.headers.csp.Content-Security-Policy.worker-src")}}</p>
<h2 id="See_also">See also</h2>
<ul>
<li>{{HTTPHeader("Content-Security-Policy")}}</li>
<li><a href="/docs/Web/API/Web_Workers_API/Using_web_workers#Content_security_policy">CSP for Web Workers</a></li>
<li>{{domxref("Worker")}}, {{domxref("SharedWorker")}}, {{domxref("ServiceWorker")}}</li>
</ul>
|
