Content distribution network flow limiting method and system

The invention provides a content distribution network flow limiting method and system, and belongs to the technical field of OTA upgrade, and the method comprises the steps: S1, receiving a detection request, and obtaining a flow limiting strategy from a cache according to the detection request; S2, analyzing the flow limiting strategy according to a preset strategy analysis rule to obtain the number of detectable devices limited by the flow limiting strategy within a preset limiting time; S3, acquiring the number of the detected devices in the preset limit time, and judging whether to respond to the detection request according to the number of the detected devices in the preset limit time and the number of the detectable devices. The technical scheme has the beneficial effects that the CDN flow is controlled by limiting the number of the detectable devices within a period of time, and the problem that payment cannot be carried out due to network congestion caused by sudden increase of the CDN flow is avoided