File downloading method, file downloading device and file downloading system

Abstract

The invention discloses a file downloading method, a file downloading device and a file downloading system, which are applied to a transmitting system under a client-proxy-server mode. A monitoring client is arranged in a server. The method comprises the following steps that: a proxy receives a file downloading request from the client and sends a file content checking request to the monitoring client; the monitoring client checks the content of a file to be downloaded and returns a check result to the proxy; and the proxy performs subsequent data forwarding according to the check result. Consequently, the proxy needs not to check the file content and cache a large amount of data therefore, but is only required to perform specific data forwarding according to the check result of the file content, so requirement on the allocated memory size of proxy equipment is low and no additional memory needs adding to cache the file. Meanwhile, the concurrency performance of the proxy can be improved remarkably and the response delay of the client is shortened.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a file downloading method, device and system in a "client-agent-server" mode transmission system. Background technique [0002] see figure 1 , which is a schematic diagram of the transmission system of the "client-agent-server" mode. At present, the transmission system involving the "client-agent-server" mode can be implemented by running SMB (Server Message Block, server information block) / HTTP (Hypertext Transfer Protocol, Hypertext Transfer Protocol) / FTP (File Transfer Protocol, File Transfer Protocol) / SMTP (Simple Mail Transfer Protocol, Simple Mail Transfer Protocol) / POP3 (Post Office Protocol 3, the third version of the Post Office Protocol) and other protocols for communication. [0003] As a proxy deployed between network clients and servers, it often has the following characteristics: [0004] Relative to the client, the proxy is a "server", and relative to th...

AI Technical Summary

Problems solved by technology

[0024] The present invention provides a file download method, device and system to solve the problem of needing to cache files and inefficiency caused by checking the content of the file in the existing solution

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