Class: Jets::Controller::Rack::Adapter

Inherits:
Object
  • Object
show all
Extended by:
Memoist
Defined in:
lib/jets/controller/rack/adapter.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(event, context, meth) ⇒ Adapter

Returns a new instance of Adapter.



13
14
15
 
# File 'lib/jets/controller/rack/adapter.rb', line 13

def initialize(event, context, meth)
  @event, @context, @meth = event, context, meth
end

Class Method Details

.process(event, context, meth) ⇒ Object

Returns back API Gateway response hash structure



8
9
10
11
 
# File 'lib/jets/controller/rack/adapter.rb', line 8

def self.process(event, context, meth)
  adapter = new(event, context, meth)
  adapter.process
end

Instance Method Details

#convert_to_api_gateway(status, headers, body) ⇒ Object

Transform the structure to AWS_PROXY compatible structure docs.aws.amazon.com/apigateway/latest/developerguide/set-up-lambda-proxy-integrations.html#api-gateway-simple-proxy-for-lambda-output-format



32
33
34
35
36
37
38
39
40
41
42
 
# File 'lib/jets/controller/rack/adapter.rb', line 32

def convert_to_api_gateway(status, headers, body)
  base64 = headers["x-jets-base64"] == 'yes'
  body = body.respond_to?(:read) ? body.read : body
  body = Base64.encode64(body) if base64
  {
    "statusCode" => status,
    "headers" => headers,
    "body" => body,
    "isBase64Encoded" => base64,
  }
end

#env ⇒ Object 



25
26
27
 
# File 'lib/jets/controller/rack/adapter.rb', line 25

def env
  Env.new(@event, @context, adapter: true).convert # convert to Rack env
end

#process ⇒ Object

  1. Convert API Gateway event event to Rack env

  2. Process using full Rack middleware stack

  3. Convert back to API gateway response structure payload



20
21
22
23
 
# File 'lib/jets/controller/rack/adapter.rb', line 20

def process
  status, headers, body = Jets.application.call(env)
  convert_to_api_gateway(status, headers, body)
end

#rack_vars(vars) ⇒ Object

Called from Jets::Controller::Base.process. Example:

adapter.rack_vars(
  'jets.controller' => self,
  'lambda.context' => context,
  'lambda.event' => event,
  'lambda.meth' => meth,
)

Passes a these special variables so we have access to them in the middleware. The controller instance is called in the Main middleware. The lambda.* info is used by the Rack::Local middleware to create a mimicked controller for the local server.



58
59
60
 
# File 'lib/jets/controller/rack/adapter.rb', line 58

def rack_vars(vars)
  env.merge!(vars)
end