Resource access method, device and system

The invention provides a resource access method, device and system, and the method comprises the steps that an application server obtains an access credential according to a credential obtaining request sent by a client after receiving the credential obtaining request, and returns the access credential to the client, wherein the access credential carries a flow control strategy; when the client accesses the resources in the resource server through the access credential, the resource server performs flow control on the resource access of the client according to the flow control strategy. According to the technical scheme provided by the invention, the security problem that the front end bypasses the SDK is solved, so the security of flow control is improved, meanwhile, the flow control does not need to be performed by occupying client resources, and the consumption of the front-end resources is also reduced. 本发明提供一种资源访问方法、装置和系统，其中，该方法包括：应用服务器接收到客户端发送的凭证获取请求后，根据凭证获取请求获得访问凭证，并向客户端返回访问凭证，其中，访问凭证中携带流量控制策略；当客户端通过访问