Flex based cross-platform method for uploading files after message digest 5 (md5) value is checked at browser end

Abstract

The invention relates to a cross-platform method for uploading files after a message digest 5 (md5) value is checked by a browser. By means of the method, before a user uploads local files, the calculating of the md5 value of the files by a Flash embedded into a webpage is facilitated, and a mode that a Flex calls a C++ library function to calculate the md5 value is combined so as to achieve high speed calculation of the md5 value. The Flash is a cross-platform browser plug-in unit, so that the md5 value of the files can be calculated at a browser end in operating systems of windows, mac, linux and the like, and defects that the efficiency is low, the resources are wasted, traditional methods depend on the operating systems, the generality is absent, and the like in terms of the traditional methods that the md5 value can be started to be calculated at a server end only when the files are completely uploaded to the server are overcome. A Flex technology is utilized, the browser calculates the md5 value of the files before the files are uploaded, the md5 value is checked at the server end, and whether same files exist or not is judged. By means of the method, duplicated files are prevented from being uploaded, the flow is saved, the pressure of a server is reduced, the resources are reasonably utilized, and the file upload efficiency is greatly improved.

Description

Technical field: [0001] The present invention relates to a method for uploading files after a Flex-based cross-platform browser carries out file md5 verification, combined with server-side verification, and also involves Flex technology, C / C++ technology, Java client and server-side technologies , belonging to the field of software technology. Background technique: [0002] With the improvement of network speed and the rapid development of the Internet, Flex, as a new generation of rich Internet client application technology, has powerful interactive functions, and its application is becoming more and more extensive. As a cross-platform browser plug-in, Flash enables Flex technology to be applied to the development of various web component applications. [0003] With the explosive growth of Internet data, the phenomenon of data duplication is obvious, the demand for bandwidth and traffic is increasing, and user experience has become an important factor in the development of...

AI Technical Summary

Problems solved by technology

[0004] However, due to the design of Flex itself, the efficiency of implementing the md5 algorithm based on the native API is very low, and it also takes up a lot of system resources.

In addition, in the past, the Flash virtual machine used AVM2, which also led to low efficiency in the calculation of large files.

Therefore, the current Flex-based upload components do not have the function of locally calculating the file md5 value

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