Class: Jsonp::StatusWrapper

Inherits:
Object
  • Object
show all
Defined in:
lib/jsonp/status_wrapper.rb

Overview

Wraps JSONP response with HTTP status code and message. If the response contains no JSON data, it’s replaced by JSON status and raises no error in the browser.

Instance Method Summary collapse

Constructor Details

#initialize(app, options = {}) ⇒ StatusWrapper

Returns a new instance of StatusWrapper.



7
8
9
10
 
# File 'lib/jsonp/status_wrapper.rb', line 7

def initialize(app, options = {})
  @app = app
  @callback_param = options.fetch(:callback_param, "_callback")
end

Instance Method Details

#call(env) ⇒ Object 



12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
 
# File 'lib/jsonp/status_wrapper.rb', line 12

def call(env)
  status, headers, response = @app.call(env)
  callback = Utils.extract_callback(env, @callback_param)

  if callback && ((200...300).include?(status.to_i) || (400...600).include?(status.to_i))
    type = Utils.status_message(status)
    prefix, suffix = %Q({"status":#{status},"type":"#{type}"), "}"

    if headers["Content-Type"] =~ %r{^(?:application/json|text/json|text/x-json)}
      prefix << %Q(,"content":)
      response = Utils::Wrapper.new(prefix, response, suffix)
      headers["Content-Length"] = (prefix.bytesize + headers["Content-Length"].to_i + suffix.bytesize).to_s
    else
      headers["Content-Type"] = "application/json"
      response = [prefix, suffix]
      headers["Content-Length"] = (prefix.bytesize + suffix.bytesize).to_s
    end

    status = 200
  end

  [status, headers, response]
end