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#Mozilla wiki offline windows#
ETagĪ unique string identifying the version of the resource.Mozilla Sunbird main window running under Windows Vistaġ.0 Beta 1 (March 30, 2010 12 years ago ( )) ġ.0 beta 1 (March 30, 2010 12 years ago ( ) ) Conditional requests using If-Modified-Since and If-Unmodified-Since use this value to change the behavior of the request. It is less accurate than ETag, but easier to calculate in some environments. The last modification date of the resource, used to compare several versions of the same resource. Note that only hop-by-hop headers may be set using the Connection header. These headers are meaningful only for a single transport-level connection, and must not be retransmitted by proxies or cached. Intermediate proxies must retransmit these headers unmodified and caches must store them. These headers must be transmitted to the final recipient of the message: the server for a request, or the client for a response.
#Mozilla wiki offline upgrade#
Upgrade (see also Protocol upgrade mechanism).Headers can also be grouped according to how proxies handle them: Payload headers contain representation-independent information about payload data, including content length and the encoding used for transport.Representation headers contain information about the body of the resource, like its MIME type, or encoding/compression applied.Response headers hold additional information about the response, like its location or about the server providing it.Request headers contain more information about the resource to be fetched, or about the client requesting the resource.Headers can be grouped according to their contexts: IANA also maintains a registry of proposed new HTTP headers. Whitespace before the value is ignored.Ĭustom proprietary headers have historically been used with an X- prefix, but this convention was deprecated in June 2012 because of the inconveniences it caused when nonstandard fields became standard in RFC 6648 others are listed in an IANA registry, whose original content was defined in RFC 4229. An HTTP header consists of its case-insensitive name followed by a colon ( :), then by its value. HTTP headers let the client and the server pass additional information with an HTTP request or response. Experimental Feature-Policy: xr-spatial-tracking.Experimental Non-Standard Feature-Policy: unsized-media.Experimental Non-Standard Feature-Policy: unoptimized-images.Experimental Feature-Policy: speaker-selection.Experimental Feature-Policy: screen-wake-lock.Experimental Feature-Policy: publickey-credentials-get.Experimental Feature-Policy: picture-in-picture.
Reason: expected 'true' in CORS header 'Access-Control-Allow-Credentials'.Reason: Did not find method in CORS header 'Access-Control-Allow-Methods'.Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Methods'.Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Headers'.Reason: CORS request external redirect not allowed.Reason: CORS header 'Access-Control-Allow-Origin' does not match 'xyz'.Experimental Non-Standard Deprecated Viewport-Width.Experimental Sec-CH-UA-Platform-Version.Experimental Sec-CH-UA-Full-Version-List.Non-Standard Deprecated Large-Allocation.Experimental Non-Standard Deprecated DPR.Experimental Non-Standard Deprecated Content-DPR.Experimental Non-Standard Deprecated Accept-CH-Lifetime.
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