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Contexts: Difference between revisions
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(→Context types: add navigate) |
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| rowspan=" | | rowspan="2" | [http://mimesniff.spec.whatwg.org/#mime-type-sniffing-algorithm MIME type sniffing algorithm] | ||
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| nested browsing (navigate) | | nested browsing (navigate) | ||
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| connection | | connection (EventSource, WebSocket, XMLHttpRequest) | ||
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| Yes | | Yes | ||
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| Yes? | | Yes? | ||
| [https://dvcs.w3.org/hg/content-security-policy/raw-file/tip/csp-specification.dev.html#connect-src <code>connect-src</code>] | | [https://dvcs.w3.org/hg/content-security-policy/raw-file/tip/csp-specification.dev.html#connect-src <code>connect-src</code>] | ||
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Revision as of 07:17, 20 June 2013
Context types
| Context | Definition | Used in HTML? | Used in CSS? | Scriptable? | CSP Directive | Type Hint | Sniffing Algorithm |
|---|---|---|---|---|---|---|---|
| browsing (navigate) | HTML | Yes | No? | Yes | — | MIME type sniffing algorithm | |
| nested browsing (navigate) | HTML | Yes | No? | Yes | frame-src
|
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| connection (EventSource, WebSocket, XMLHttpRequest) | Yes | No? | Yes? | connect-src
|
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| image | Yes | Yes | No | img-src
|
rules for sniffing images specifically | ||
| audio/video | Yes | No? | No | media-src
|
rules for sniffing audio and video specifically | ||
| plugin | Yes | No? | Yes? | object-src
|
rules for sniffing in a plugin context | ||
| style | Yes | Yes? | No | style-src
|
@type or "text/css"
|
rules for sniffing in a style context | |
| script | Yes | No? | Yes? | script-src
|
@type or "text/javascript"
|
rules for sniffing in a script context | |
| font | No | Yes | No | font-src
|
format()
|
rules for sniffing fonts specifically | |
| text track | Yes | No | No | "text/vtt"
|
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| cache manifest | Yes | No | No | "text/cache-manifest"
|
How to use a context
- Identify context.
- Determine whether to fetch resource based on CSP directives and type hint, if any.
- Set no-sniff flag on resource, if necessary.
- Fetch resource.
- Handle resource.
- Sniff resource.
- Process and display resource or prompt to download resource, as appropriate.