class Jets::Controller::Middleware::Local::ApiGateway

def event 

def event
  resource = @route.path(:api_gateway) # posts/{id}/edit
  path = @env['PATH_INFO'].sub('/','') # remove beginning slash
  {
    "resource" => "/#{resource}", # "/posts/{id}/edit"
    "path" => @env['PATH_INFO'],  # /posts/tung/edit
    "httpMethod" => @env['REQUEST_METHOD'], # GET
    "headers" => request_headers,
    "queryStringParameters" => query_string_parameters,
    "pathParameters" => @route.extract_parameters(path),
    "stageVariables" => nil,
    "requestContext" => {},
    "body" => get_body,
    "isBase64Encoded" => false,
  }
end

def get_body

rack.input: #
To get the post body: 
def get_body
  input = @env["rack.input"] || StringIO.new
  body = input.read
  input.rewind # IMPORTANT or else it screws up other middlewares that use the body
  # return nil for blank string, because Lambda AWS_PROXY does this
  body unless body.empty?
end

def initialize(route, env) 

def initialize(route, env)
  @route, @env = route, env
end

def query_string_parameters 

def query_string_parameters
  Rack::Utils.parse_nested_query(@env['QUERY_STRING'])
end

def request_headers

local request from a remote request on API Gateway.
they would be fake anyway and by not adding them we can distinguish a
We generally do add those API Gateway Lambda specific headers because

spec/fixtures/samples/event-headers-form-post.json
For sample dump of the event headers, check out:

"X-Forwarded-Proto": "https",
"X-Forwarded-Port": "443",
"X-Forwarded-For": "88.88.88.88, 54.239.203.117",
"X-Amzn-Trace-Id": "Root=1-5a0dc1ac-58a7db712a57d6aa4186c2ac",
"X-Amz-Cf-Id": "W8DF6J-lx1bkV00eCiBwIq5dldTSGGiG4BinJlxvN_4o8fCZtbsVjw==",

Some API Gateway Lambda Proxy are also in the rack env headers. Example:

prepended by HTTP_.
Map rack env headers to Api Gateway event headers. Most rack env headers are 
def request_headers
  headers = @env.select { |k,v| k =~ /^HTTP_/ }.inject({}) do |h,(k,v)|
      # map things like HTTP_USER_AGENT to "User-Agent"
      key = k.sub('HTTP_','').split('_').map(&:capitalize).join('-')
      h[key] = v
      h
    end
  # Content type is not prepended with HTTP_
  headers["Content-Type"] = @env["CONTENT_TYPE"] if @env["CONTENT_TYPE"]
  # Adjust the casing so it matches the Lambda AWS Proxy structure
  CASING_MAP.each do |nice_casing, bad_casing|
    if headers.key?(nice_casing)
      headers[bad_casing] = headers.delete(nice_casing)
    end
  end
  headers
end