![]() 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. Permissions-Policy: xr-spatial-tracking Experimental.Permissions-Policy: storage-access Experimental.Permissions-Policy: speaker-selection Experimental.Permissions-Policy: serial Experimental.Permissions-Policy: screen-wake-lock Experimental.Permissions-Policy: publickey-credentials-get Experimental.Permissions-Policy: publickey-credentials-create Experimental.Permissions-Policy: picture-in-picture Experimental.Permissions-Policy: payment Experimental.Permissions-Policy: otp-credentials Experimental.Permissions-Policy: magnetometer Experimental.Permissions-Policy: local-fonts Experimental.Permissions-Policy: idle-detection Experimental.Permissions-Policy: identity-credentials-get Experimental.Permissions-Policy: gyroscope Experimental.Permissions-Policy: gamepad Experimental.Permissions-Policy: execution-while-out-of-viewport Experimental.Permissions-Policy: execution-while-not-rendered Experimental.Permissions-Policy: encrypted-media Experimental.Permissions-Policy: document-domain Experimental.Permissions-Policy: battery Experimental.Permissions-Policy: autoplay Experimental.Permissions-Policy: ambient-light-sensor Experimental.Permissions-Policy: accelerometer Experimental.Reason: Multiple CORS header 'Access-Control-Allow-Origin' not allowed.Reason: missing token 'xyz' in CORS header 'Access-Control-Allow-Headers' from CORS preflight channel.Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Methods'.Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Headers'.Reason: expected 'true' in CORS header 'Access-Control-Allow-Credentials'.Reason: Did not find method in CORS header 'Access-Control-Allow-Methods'.Reason: Credential is not supported if the CORS header 'Access-Control-Allow-Origin' is '*'.Reason: CORS request external redirect not allowed.Reason: CORS preflight channel did not succeed. ![]() Reason: CORS header 'Origin' cannot be added.Reason: CORS header 'Access-Control-Allow-Origin' missing.Reason: CORS header 'Access-Control-Allow-Origin' does not match 'xyz'.CSP: require-trusted-types-for Experimental.CSP: prefetch-src Non-standard Deprecated.CSP: plugin-types Non-standard Deprecated.CSP: block-all-mixed-content Deprecated.Sec-CH-UA-Platform-Version Experimental.Sec-CH-UA-Full-Version-List Experimental.Sec-CH-Prefers-Reduced-Transparency Experimental.Sec-CH-Prefers-Reduced-Motion Experimental.Large-Allocation Non-standard Deprecated.Accept-CH-Lifetime Non-standard Deprecated. ![]()
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