lib/munson/middleware/encode_json_api.rb
module Munson
module Middleware
class EncodeJsonApi < Faraday::Middleware
CONTENT_TYPE = 'Content-Type'.freeze
ACCEPT = 'Accept'.freeze
MIME_TYPE = 'application/vnd.api+json'.freeze
USER_AGENT = 'User-Agent'.freeze
def initialize(app, key_formatter = nil)
super(app)
@key_formatter = key_formatter
end
def call(env)
env[:request_headers][USER_AGENT] = "Munson v#{Munson::VERSION}"
env[:request_headers][ACCEPT] ||= MIME_TYPE
match_content_type(env) do |data|
env[:body] = encode data
end
@app.call env
end
def encode(data)
json = @key_formatter ? @key_formatter.externalize(data) : data
::JSON.dump(json)
end
def match_content_type(env)
if process_request?(env)
env[:request_headers][CONTENT_TYPE] ||= MIME_TYPE
yield env[:body] unless env[:body].respond_to?(:to_str)
end
end
def process_request?(env)
type = request_type(env)
has_body?(env) and (type.empty? or type == MIME_TYPE)
end
def has_body?(env)
body = env[:body] and !(body.respond_to?(:to_str) and body.empty?)
end
def request_type(env)
type = env[:request_headers][CONTENT_TYPE].to_s
type = type.split(';', 2).first if type.index(';')
type
end
end
end
end
Faraday::Request.register_middleware :"Munson::Middleware::EncodeJsonApi" => Munson::Middleware::EncodeJsonApi