cowboy_req:has_resp_header(3)

Name

cowboy_req:has_resp_header - Is the given response header set?

Description

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.

Arguments

Name

Header name as a lowercase binary string.

Req

The Req object.

Return value

A boolean indicating whether the given response header has been set.

Changelog

• 1.0: Function introduced.

Examples

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).

See also

cowboy_req(3), cowboy_req:set_resp_header(3), cowboy_req:set_resp_headers(3), cowboy_req:resp_header(3), cowboy_req:resp_headers(3), cowboy_req:delete_resp_header(3)