File transmission method, device and system

Abstract

The invention discloses a file transmission method, device and system, and relates to the technical field of computers. A specific embodiment of the method comprises the following steps: receiving a query request from a file receiver, wherein the query request is used for querying a target file; sending a sub-file list to the file receiver, wherein the sub-file list comprises identifiers of multiple sub-files, and the multiple sub-files are obtained by splitting the target file; receiving a downloading request of the file receiver, wherein the downloading request comprises an identifier of a target sub-file; and sending the target sub-file corresponding to the identifier of the target sub-file to the file receiver. According to the embodiment, the target file is divided into the multiple sub-files, the file receiver can achieve multi-thread concurrent downloading, the file transmission efficiency is improved, and the problem that in the prior art, transmission time consumption is not controlled is solved; according to the file list, the same file can be downloaded repeatedly, and the problem of network anomaly disaster tolerance in the prior art is solved.

Description

technical field [0001] The present invention relates to the field of computer technology, in particular to a file transmission method, device and system. Background technique [0002] At present, when exchanging text files between heterogeneous systems, FTP (File Transfer Protocol, File Transfer Protocol), SFTP (Secure File Transfer Protocol, Secure File Transfer Protocol), SMTP (Simple Mail Transfer Protocol, Simple Mail Transfer Protocol) are generally used. ) and other protocols to complete the transmission and sharing of text files. For example, Internet transaction systems and bank transaction systems generally involve transaction data transmission reconciliation and auditing. To achieve such transaction data reconciliation and auditing between two heterogeneous transaction systems, both parties to the transaction must define the header of the data file. Trailer, delimiter, field, file name, file storage FTP / SFTP server and other information, the text file transfer par...

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Problems solved by technology

[0003] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: the time consumption of text file transmission is uncontrolled, and the general transaction reconciliation file is generated in a fixed format. However, according to the difference in transaction record data, The size of the generated files is variable, so the time-consuming file transfer is uncontrolled; the network exception disaster recovery problem during the transfer process, if a network exception occurs during the transfer process, all transferred files will need to be re-transmitted, and at the same time Maybe the file receiver has started to read these incompletely transmitted files, resulting in incomplete data obtained by the file receiver; the storage server network security problem, for the FTP protocol itself and the specific transfer process of FTP, there are security risks in many places. The client link exposes the server IP, port, user name, and password, which is easy to be attacked by hackers; hardware server resource waste, this method requires the support of the hardware storage server of the FTP / SFTP server, which will cause unnecessary waste of the server

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