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HTTP Fetch Policy: Difference between revisions
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* Never work: CONNECT, TRACE, and TRACK (subset of the above). | * Never work: CONNECT, TRACE, and TRACK (subset of the above). | ||
Author headers: Everything but [http://xhr.spec.whatwg.org/#dom-xmlhttprequest-setrequestheader setRequestHeader()]. | Author headers: Everything but [http://xhr.spec.whatwg.org/#dom-xmlhttprequest-setrequestheader setRequestHeader()] limitations. | ||
Headers: Host, Origin, ... | Headers: Host, Origin, ... | ||
Revision as of 19:22, 23 March 2013
This document tries to document the platform's fetching policy for HTTP.
Request
General limitations
Methods:
- Uppercased (so e.g. geT becomes GET): CONNECT, DELETE, GET, HEAD, OPTIONS, POST, PUT, TRACE, and TRACK.
- Never work: CONNECT, TRACE, and TRACK (subset of the above).
Author headers: Everything but setRequestHeader() limitations.
Headers: Host, Origin, ...
Body: No limitations
Additional general cross-origin (no preflight) limitations
Methods: Only GET, HEAD, and POST.
Author headers: Only Accept, Accept-Language, Content-Language, and Content-Type. If Content-Type, value excluding parameters must be application/x-www-form-urlencoded, multipart/form-data, or text/plain.
EventSource cross-origin (no preflight) allowance
Headers: Also Last-Event-ID
CSP cross-origin (no preflight) allowance
Headers: Also Content-Type with value application/json
WebSocket cross-origin (no preflight) allowance
Headers: Also Upgrade: websocket, Connection: Upgrade, Sec-WebSocket-Key, Sec-WebSocket-Protocol, Sec-WebSocket-Version
Response
...