JavaScript Compute file MD5 browser JavaScript read file contents

In principle, the browser is an insecure environment. The content of the early browser is static, the user surf the internet, generally pull the page to view. Later, with the development of the Internet, the browser provides a very rich user interaction function. From the early forms of interaction, to the current websocket real-time communication, and even the popularity of HTML5.

HTML5 to the previous development has brought a lot of powerful tools, before the browser mostly through the Flash plug-in file upload and download, now we can use HTML5 to bring us the FileReader API, read the user through the form selected file content.

FileReader for details, please visit:

Https://developer.mozilla.org/zh-CN/docs/Web/API/FileReader

JavaScript calculates the file MD5 value, please go to:

Https://github.com/satazor/js-spark-md5

Demo implementation:

<! DOCTYPE html>
Results:
Finish the effect:
Original link: https://www.cnblogs.com/linyihai/p/7040786.html
JavaScript Compute file MD5 browser JavaScript read file contents