File uploading device based on asynchronous javascript and xml (Ajax) technology

Abstract

The invention discloses a file uploading device based on asynchronous javascript and xml (Ajax) technology, which comprises the processes that a user terminal is used for confirming a file needing unloading which is transmitted to a server through the user terminal in Ajax asynchronous communication mode, the server receives confirmed writing-in instruction transmitted by the user terminal and writes the file needing unloading stored in a buffer zone into a storage unit, and then the file needing unloading stored in the server is deleted.

Description

technical field [0001] The invention relates to Internet file transmission technology, in particular to a file uploading device based on Ajax (Asynchronous JavaScript and XML) technology. Background technique [0002] With the continuous development of Internet technology and applications, Web business platforms have been widely used in e-commerce and enterprise informatization, and more and more applications are set up on Web business platforms. As an important part of web services, file upload can be implemented through plug-ins or editors. [0003] With the development of web services, users have higher and higher requirements for file upload speed and security. Currently, the solutions adopted by the industry are divided into two methods: single-file upload and multi-file upload according to the number of files allowed to be uploaded at one time. In the traditional single file upload, only one file can be selected for upload at a time, requiring the user to click the "...

AI Technical Summary

Problems solved by technology

In the traditional single file upload, only one file can be selected for upload at a time, requiring the user to repeatedly click the "Browse" and "Upload" buttons and wait for the upload. The waiting time is long and the operation is cumbersome, which affects the user experience

Multi-file upload provides a non-standard upload interface, allowing users to select multiple files and click the "upload" button to upload multiple files simultaneously. The amount of data increases, thus occupying more network bandwidth, and the waiting time for users in the later stage is still very long, which cannot improve user experience

[0004] And, no matter which one of the above schemes, generally all adopt the mode of directly writing to the hard disk of the server. When the user is not satisfied with uploading the file, if he chooses to delete the file just written to the hard disk of the server, the input / output (I / O , Input / Output) port restrictions will seriously affect the execution speed; if you choose to ignore the uploaded files, it will inevitably cause the files that have been written to the server's hard disk to become junk files, thereby wasting server resources. What's more terrible is that hackers It is easy to use this defect to attack the server by placing a lot of junk files in the disk space on the server. Therefore, the existing file upload system has poor security

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