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    • Home

    Access-Control-Allow-Headers

    Published Jul 01, 2024 [  Network  ]

    The Access-Control-Allow-Headers response header is used in response to a preflight request which includes the Access-Control-Request-Headers to indicate which HTTP headers can be used during the actual request.

    This header is required if the request has an Access-Control-Request-Headers header.

    Syntax

    Access-Control-Allow-Headers: [<header-name>[, <header-name>]*]
Access-Control-Allow-Headers: *

    Directives

    • <header-name>

      • The name of a supported request header. The header may list any number of headers, separated by commas.

    • * (wildcard)

      • The value “” only counts as a special wildcard value for requests without credentials (requests without HTTP cookies or HTTP authentication information). In requests with credentials, it is treated as the literal header name “” without special semantics. Note that the Authorization header can’t be wildcarded and always needs to be listed explicitly.