# File lib/fog/aws/requests/lambda/invoke.rb, line 17
        def invoke(params={})
          headers = {}
          if client_context = params.delete('ClientContext')
            headers['X-Amz-Client-Context'] =
              Base64::encode64(Fog::Json.encode(client_context))
          end
          if client_type = params.delete('InvocationType')
            headers['X-Amz-Client-Type'] = client_type
          end
          if log_type = params.delete('LogType')
            headers['X-Amz-Log-Type'] = log_type
          end
          payload = Fog::JSON.encode(params.delete('Payload'))
          function_name = params.delete('FunctionName')

          request({
            :method  => 'POST',
            :path    => "/functions/#{function_name}/invocations",
            :headers => headers,
            :body    => payload,
            :expects => [200, 202, 204]
          }.merge(params))
        end