Class: Maze::Servlets::ReflectiveServlet

Inherits:
BaseServlet
  • Object
show all
Defined in:
lib/maze/servlets/reflective_servlet.rb

Overview

Receives HTTP requests and responds according to the parameters given, which are:

  • delay_ms - milliseconds to wait before responding

  • status - HTTP response code

For GET requests these are expected to passed as GET parameters, for POST requests they are expected to be given as JSON fields.

Instance Method Summary collapse

Instance Method Details

#do_GET(request, response) ⇒ Object

Accepts a GET request to provide a reflective response to.

Parameters:

  • request (HTTPRequest) —

    The incoming GET request

  • response (HTTPResponse) —

    The response to return



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# File 'lib/maze/servlets/reflective_servlet.rb', line 17

def do_GET(request, response)
  delay_ms = request.query['delay_ms']
  status = request.query['status']
  reflect response, delay_ms, status
end

#do_OPTIONS(request, response) ⇒ Object

Logs and returns a set of valid headers for this servlet.

Parameters:

  • request (HTTPRequest) —

    The incoming GET request

  • response (HTTPResponse) —

    The response to return



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# File 'lib/maze/servlets/reflective_servlet.rb', line 63

def do_OPTIONS(request, response)
  super

  response.header['Access-Control-Allow-Methods'] = 'GET, POST, OPTIONS'
end

#do_POST(request, response) ⇒ Object

Accepts a POST request to provide a reflective response to.

Parameters:

  • request (HTTPRequest) —

    The incoming GET request

  • response (HTTPResponse) —

    The response to return



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# File 'lib/maze/servlets/reflective_servlet.rb', line 27

def do_POST(request, response)

  content_type = request['Content-Type']

  # For JSON, pull the instructions from the body.  Otherwise, take them from the query string.
  if content_type == 'application/json'
    body = JSON.parse(request.body)
    delay_ms = body['delay_ms']
    status = body['status']
  else
    query = Rack::Utils.parse_nested_query(request.query_string)
    delay_ms = query['delay_ms']
    status = query['status']
  end

  reflect response, delay_ms, status
rescue JSON::ParserError => e
  msg = "Unable to parse request as JSON: #{e.message}"
  $logger.error msg
  response.status = 418
rescue StandardError => e
  $logger.error "Invalid request: #{e.message}"
  response.status = 500
end

#reflect(response, delay_ms, status) ⇒ Object 



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# File 'lib/maze/servlets/reflective_servlet.rb', line 52

def reflect(response, delay_ms, status)
  sleep delay_ms.to_i / 1000 unless delay_ms.nil?
  response.status = status || 200
  response.header['Access-Control-Allow-Origin'] = '*'
  response.body = "Returned status #{status} after waiting #{delay_ms} ms"
end