Blockchain-based file processing method, apparatus, and device, and storage medium

A system for blockchain-based file processing, comprising a processor and a non-transitory computer-readable storage medium storing instructions executable by the processor to cause the system to perform operations comprising:

• receiving, from a client, a request for downloading a target file stored in a blockchain, the request comprising a network address of the client and a file address of the target file, wherein the blockchain comprises a plurality of nodes and each node having stored the target file and network addresses of one or more other nodes of the plurality of nodes;
• determining, based on the network address information of the client, a set of candidate blockchain nodes in the blockchain from which the client has downloaded one or more files a number of times greater than a predetermined threshold number;
• determining a target blockchain node having a network address that is the closest to the network address of the client among the set of candidate blockchain nodes;
• downloading the target file from the determined target blockchain node based on the file address information;
• and
• returning the downloaded target file to the client.

A non-transitory computer-readable storage medium for blockchain-based file processing, configured with instructions executable by one or more processors to cause the one or more processors to perform operations comprising:

• receiving, from a client, a request for downloading a target file stored in a blockchain, the request comprising a network address of the client and a file address of the target file, wherein the blockchain comprises a plurality of nodes and each node having stored the target file and network addresses of one or more other nodes of the plurality of nodes;
• determining, based on the network address information of the client, a set of candidate blockchain nodes in the blockchain from which the client has downloaded one or more files a number of times greater than a predetermined threshold number;
• determining a target blockchain node having a network address that is the closest to the network address of the client among the set of candidate blockchain nodes;
• downloading the target file from the determined target blockchain node based on the file address information;
• and
• returning the downloaded target file to the client.