Class: Hoth::Providers::RackProvider

Inherits:
Object
  • Object
show all
Defined in:
lib/hoth/providers/rack_provider.rb

Instance Method Summary collapse

Constructor Details

#initialize(app = nil) ⇒ RackProvider

Returns a new instance of RackProvider.



7
8
9
 
# File 'lib/hoth/providers/rack_provider.rb', line 7

def initialize(app=nil)
  @app = app || lambda {|env| [404, {'Content-Type' => "text/plain"}, ["Nothing here!"]]}
end

Instance Method Details

#call(env) ⇒ Object 



11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
 
# File 'lib/hoth/providers/rack_provider.rb', line 11

def call(env)
  if env["PATH_INFO"] =~ /^\/execute/
    begin
      req = Rack::Request.new(env)

      service_name   = req.params["name"]
      service_params = req.params["params"]

      raise EmptyServiceNameError.new("You must provide a service name!") if service_name.nil?

      responsible_service = ServiceRegistry.locate_service(service_name)

      raise ServiceNotFoundException.new("The requested service '#{service_name}' was not found!") if responsible_service.nil?

      # check if we have called ourself
      raise RecursiveServiceCallException.new("Service caller and callee have the same Client-UUID!") if req.params["caller_uuid"] == Hoth.client_uuid

      decoded_params = responsible_service.transport.encoder.decode(service_params)
      result = Hoth::Services.send(service_name, *decoded_params)

      encoded_result = responsible_service.transport.encoder.encode({"result" => result})

      [200, {'Content-Type' => responsible_service.transport.encoder.content_type, 'Content-Length' => "#{encoded_result.length}"}, [encoded_result]]
    rescue Exception => e
      Hoth::Logger.error "e: #{e.message}"

      if responsible_service
        encoded_error = responsible_service.transport.encoder.encode({"error" => e})
        [500, {'Content-Type' => responsible_service.transport.encoder.content_type, 'Content-Length' => "#{encoded_error.length}"}, [encoded_error]]
      else
        plain_error = "An error occurred! (#{e.message})"
        [e.class == ServiceNotFoundException ? 404 : 500, {'Content-Type' => "text/plain", 'Content-Length' => "#{plain_error.length}"}, [plain_error]]
      end
    end
  else
    @app.call(env)
  end
end