Class: XiWechatCorp::Callback::Rack

Inherits:
Object
  • Object
show all
Includes:
Rack::Utils
Defined in:
lib/xi_wechat_corp/callback/rack.rb

Constant Summary collapse

CONTENT_TYPE = 
'application/xml; charset=utf-8'

Instance Method Summary collapse

Constructor Details

#initialize(app, &block) ⇒ Rack

Returns a new instance of Rack.



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# File 'lib/xi_wechat_corp/callback/rack.rb', line 14

def initialize(app, &block)
  @app = app
  @config = Config.new.configure(&block)
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/xi_wechat_corp/callback/rack.rb', line 19

def call(env)
  rack_request = ::Rack::Request.new(env)
  if (rack_request.get? || rack_request.post?) &&
      (request = @config.build_request(rack_request))
    request.verify!
    if rack_request.get?
      ::Rack::Response.new([request.challenge]).finish
    else
      request.decrypt
      env['xi_wechat_corp.params'] = request.params
      status, headers, body = @app.call(env)
      rack_response = ::Rack::Response.new([], status, headers)
      if rack_response.successful?
        rack_response.status = 200 if status == 201
        response = request.build_response(read_body(body))
        xml = response.to_s
        if !xml.empty?
          rack_response['Content-Type'] = CONTENT_TYPE
          rack_response.write xml
        end
        rack_response.finish
      else
        [status, headers, body]
      end
    end
  else
    @app.call(env)
  end
rescue XiWechatCorp::Error => e
  if XiWechatCorp.logger
    XiWechatCorp.logger.error(e.message)
  end 
  [403, {}, []]
end

#read_body(body) ⇒ Object 



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# File 'lib/xi_wechat_corp/callback/rack.rb', line 54

def read_body(body)
  ret = ''
  body.each do |str|
    ret << str
  end
  body.close if body.respond_to?(:close)
  ret
end