resp_header(Name, Req) -> resp_header(Name, Req, undefined) resp_header(Name, Req, Default) -> binary() | Default Name :: binary() %% lowercase; case insensitive Req :: cowboy_req:req() Default :: any()
cowboy_req:resp_header - Response header
resp_header(Name, Req) -> resp_header(Name, Req, undefined) resp_header(Name, Req, Default) -> binary() | Default Name :: binary() %% lowercase; case insensitive Req :: cowboy_req:req() Default :: any()
Return the value for the given response header.
The response header must have been set previously using cowboy_req:set_resp_header(3) or cowboy_req:set_resp_headers(3).
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.
Desired response header name as a lowercase binary string.
The Req object.
Default value returned when the header is missing.
The header value is returned as a binary string. When the header is missing, the default argument is returned.
2.0: Function introduced.
Type = cowboy_req:resp_header(<<"content-type">>, Req).
Type = cowboy_req:resp_header(<<"content-type">>, Req, <<"text/html">>).