Method for callback after file downloading is completed

Abstract

The invention discloses a method for callback after file downloading is completed, which comprises the following steps of: creating a file downloading request and a callback request by using a client,simultaneously sending the file downloading request and the callback request to a server, intercepting and processing the requests by using the server, and returning the callback request to the client to execute a callback process. According to the invention, the Form form request and the Ajax request are sent to the server at the same time through the client; and the Ajax request is ensured to be completed later than the Form request in a thread synchronization mode at the server side, so that developers can easily set callback after the file downloading is completed, and the user experienceof related services is improved.

Description

technical field [0001] The invention belongs to the technical field of web service application, and in particular relates to a callback method after file download is completed. Background technique [0002] The file download function is often used in web applications, and there is often a need to trigger some events after the file download is completed. Here, it is referred to as "callback after the file download is completed", such as giving the user an appropriate prompt after the download file is completed. 1. After the file is downloaded, the page needs to dynamically refresh a certain area. After the file is downloaded, it needs to enter the next important processing flow immediately. However, the ECMAScript standard does not provide a callback interface for file data to be saved after being transmitted to the browser through the server, so developers cannot directly execute the code logic added by themselves after the file download is completed. [0003] The current m...

AI Technical Summary

Problems solved by technology

Disadvantages: unable to handle large files; low efficiency; unable to implement callback after the browser saves the file, only callback when the file starts to download

Disadvantages: The whole process is divided into storing first and then downloading; the files to be downloaded must be stored according to the specified location, which has certain restrictions on background development; it is impossible for the browser to execute a callback after saving the file, and it can only be done in the file Callback when download starts

[0006] In the above method, only the order of file formation and callback can be controlled, but the processing order of download and callback cannot be realized. For businesses that require order for download completion and subsequent processing, the correctness of business logic cannot be guaranteed

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