http::basic_parser::on_field

http::basic_parser::on_field_impl

Called once for each complete field in the HTTP header.

void
on_field_impl(
    field name,
    string_view name_string,
    string_view value,
    error_code& ec);

This virtual function is invoked for each field that is received while parsing an HTTP message.

Name	Description
`name`	The known field enum value. If the name of the field is not recognized, this value will be `field::unknown`.
`name_string`	The exact name of the field as received from the input, represented as a string.
`value`	A string holding the value of the field.
`ec`	An output parameter which the function may set to indicate an error. The error will be clear before this function is invoked.

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