Abstract: The present invention discloses a file downloading method, a server, a download access node, and a distributed storage system, which pertains to the field of communications technologies, and is designed to resolve a problem in the prior art that load on the server increases, and an authentication speed and a response speed for downloading a file are reduced. The file downloading method includes: acquiring, by a server, download permission that is set, and generating an access control list parameter of the download permission; and releasing, by the server, a download link that includes the access control list parameter, so that a terminal acquires the download link and generates a download request that includes the access control list parameter.

Abstract: The present invention discloses a file downloading method, a server, a download access node, and a distributed storage system, which pertains to the field of communications technologies, and is designed to resolve a problem in the prior art that load on the server increases, and an authentication speed and a response speed for downloading a file are reduced. The file downloading method includes: acquiring, by a server, download permission that is set, and generating an access control list parameter of the download permission; and releasing, by the server, a download link that includes the access control list parameter, so that a terminal acquires the download link and generates a download request that includes the access control list parameter.

Abstract: The present application provides a file synchronization method, a server, and a terminal. The method includes: receiving a file synchronization request sent by a terminal; responding to the file synchronization request, and searching data that is of various versions of the file and stored in a server for first record data, where the first record data includes an operation record generated for the file of a predetermined version after the terminal latest synchronizes the file; and sending the first record data to the terminal, so that the terminal obtains, according to the first record data and second record data in the terminal, an operation that should be performed by the terminal, where the second record data includes an operation record performed on the file after the terminal latest synchronizes the file. Then a time for file synchronization can be shortened, consumption of a network resource can be reduced.

Abstract: The present invention discloses a file uploading method, a client, and an application server in cloud storage, and a cloud storage system. The method includes extracting an eigenvalue of a target file to be uploaded; submitting an upload request including the eigenvalue to an application server, so that the application server determines, according to the upload request, whether a client needs to upload the target file; receiving an execution instruction that is sent, according to a determining result, by the application server; and if the execution instruction is an upload instruction, uploading the target file to a file server according to the upload instruction.