maxwell v2.2.2 Maxwell.Middleware.Headers
Add fixed headers to request's headers
Examples
# Client.ex
use Maxwell.Builder ~(get)a
middleware Maxwell.Middleware.Headers, %{'User-Agent' => "zhongwencool"}
def request do
# headers is merge to %{'User-Agent' => "zhongwencool", 'username' => "zhongwencool"}
new()
|> put_req_header(%{'username' => "zhongwencool"})
|> get!
end