has_resp_header(Name, Req :: cowboy_req:req()) -> boolean() Name :: binary() %% lowercase; case insensitive
cowboy_req:has_resp_header - Is the given response header set?
has_resp_header(Name, Req :: cowboy_req:req()) -> boolean() Name :: binary() %% lowercase; case insensitive
Return whether the given response header has been set.
The header name must be given as a lowercase binary string. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.
Header name as a lowercase binary string.
The Req object.
A boolean indicating whether the given response header has been set.
1.0: Function introduced.
false = cowboy_req:has_resp_header(<<"content-type">>, Req0), Req = cowboy_req:set_resp_header(<<"content-type">>, <<"text/html">>, Req0), true = cowboy_req:has_resp_header(<<"content-type">>, Req).