DATA TRANSMITTING METHOD, SERVER AND CLIENT

Embodiments of the invention disclose a data transmitting method, a server and a client. The method embodiments of the invention include: obtaining a client application list file uploaded by a client; determining whether a file in a object application list file exists in the client application list file, and determining whether a hash value sha2 of the file in the object application list file is identical to a hash value sha2 of a file in the client application list file; adding the non-existed file into an incremental file list when the file in the object application list file does not exist in the client application list file; adding a file which is not identical into the incremental file list when the hash value sha2 of the file in the object application list file is different from the hash value sha2 of the file in the client application list file; packaging and compressing the object application list file, a signature file of the object application list file and the file in the incremental list file to create an incremental upgrade package such that the client can upgrade the application package through the incremental upgrade package.