if_unmodified_since Constant
const utility::string_t if_unmodified_since = U("If-Unmodified-Since");
Requirements
Header: http_msg.h
Namespace: web::http::header_names
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const utility::string_t if_unmodified_since = U("If-Unmodified-Since");
Header: http_msg.h
Namespace: web::http::header_names