Request ServerVariables HEADER_<HeaderName>


The value stored in the header <HeaderName>. Any header other than those listed in this table must be preceded by "HEADER_" in order for the ServerVariables collection to retrieve its value. This is useful for retrieving custom headers. Unlike HTTP_<HeaderName>, all characters in HEADER_<HeaderName> are interpreted as-is. For example, if you specify HEADER_SOME_HEADER, the server searches for a request header named SOME_HEADER. It is more likely that HEADER_Some-Header will work better as header items often are named using - not _




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