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Difference between revisions of "Contexts"

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(Context types: Rearrange columns.)
(Context types: Split out nested browsing context for simplicity.)
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|-
 
|-
 
| browsing
 
| browsing
| [http://www.whatwg.org/specs/web-apps/current-work/#browsing-context HTML]
+
| [http://www.whatwg.org/specs/web-apps/current-work/multipage/#browsing-context HTML]
 
| Yes
 
| Yes
 
| No?
 
| No?
 
| 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#frame-src <code>frame-src</code>]
+
| [https://dvcs.w3.org/hg/content-security-policy/raw-file/tip/csp-specification.dev.html#connect-src <code>connect-src</code>]
 
| —
 
| —
| [http://mimesniff.spec.whatwg.org/#mime-type-sniffing-algorithm MIME type sniffing algorithm]
+
| rowspan="2" | [http://mimesniff.spec.whatwg.org/#mime-type-sniffing-algorithm MIME type sniffing algorithm]
 +
|-
 +
| nested browsing
 +
| [http://www.whatwg.org/specs/web-apps/current-work/multipage/#nested-browsing-context HTML]
 +
| Yes
 +
| No?
 +
| Yes
 +
| [https://dvcs.w3.org/hg/content-security-policy/raw-file/tip/csp-specification.dev.html#frame-src <code>frame-src</code>]
 +
|
 
|-
 
|-
 
| image
 
| image

Revision as of 18:43, 5 June 2013


Context types

Context Definition Used in HTML? Used in CSS? Scriptable? CSP Directives Type Hint Sniffing Algorithm
browsing HTML Yes No? Yes connect-src MIME type sniffing algorithm
nested browsing HTML Yes No? Yes frame-src
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
style Yes Yes? No style-src @type or "text/css"
script Yes No? Yes? script-src @type or "text/javascript"
font No Yes No font-src format() rules for sniffing fonts specifically
text track Yes No No "text/vtt"
cache manifest Yes No No "text/cache-manifest"

How to use a context

  1. Identify context.
  2. Determine whether to fetch resource based on CSP directives and type hint, if any.
  3. Set no-sniff flag on resource, if necessary.
  4. Fetch resource.
  5. Handle resource.
  6. Sniff resource.
  7. Process and display resource or prompt to download resource, as appropriate.