Function aws_smithy_http::header::set_request_header_if_absent

source ยท 
pub fn set_request_header_if_absent<V>(
    request: Builder,
    key: HeaderName,
    value: V,
) -> Builder
where
    HeaderValue: TryFrom<V>,
    <HeaderValue as TryFrom<V>>::Error: Into<Error>,
Expand description

Given an HTTP request, set a request header if that header was not already set.