P2P-based Network File Resource Sharing System

In the old B/S model network system, the increasing of system users will give a lot of press on the server node, and that will also breakdown the entire system at last. If you want to solve the problem you can choose P2P technology.The P2P-based network resource sharing system which is described in the paper will use Centralized Topology. It consists of two parts, local client node and central server node. First, the client node submits the document sharing information to the central server node. The server creates a mapping list of the resources, and adds the list to its database. Second, other client node which wants to get file resource form the system can receive a real address of file resource from server node then it can get a data stream connection with other clients'nodes, completing download works without the help of central server node. That can decrease so much press of server, and also can make the system stranger. This system also uses multi-thread download and continue technology download technology, that can improve the efficiency of file resource download, and also can let system user to continue download working when he log into the download system again.