add file

thirdparty/mqtt/mqtt_request.cc

+#include "mqtt_request.h"
+
+namespace offcn
+{
+	std::string MqttRequest::JoinRequest(std::string local_id, std::string capacity)
+	{
+
+	}
+	std::string MqttRequest::UpdateRequest(std::string local_id, std::string capacity)
+	{
+
+	}
+	std::string MqttRequest::Candidate(std::string local_id, std::string remote_id, std::string type, std::string candidate)
+	{
+
+	}
+}
\ No newline at end of file