spark读取其他服务器文件,js-spark-md5: 引入前端js库，就能实现获取文件md5.这个用在秒传文件，上传前先获取md5对比服务器文件，有匹配到就不要上传，非常实用。个人博客：http:...

SparkMD5

SparkMD5 is a fast md5 implementation of the MD5 algorithm.

This script is based in the JKM md5 library which is the fastest algorithm around. This is most suitable for browser usage, because nodejs version might be faster.

NOTE: Please disable Firebug while performing the test!

Firebug consumes a lot of memory and CPU and slows the test by a great margin.

Improvements over the JKM md5 library

Strings are converted to utf8, like most server side algorithms

Fix computation for large amounts of data (overflow)

Incremental md5 (see bellow)

Support for array buffers (typed arrays)

Functionality wrapped in a closure, to avoid global assignments

Object oriented library

CommonJS (it can be used in node) and AMD integration

Code passed through JSHint and JSCS

Incremental md5 performs a lot better for hashing large amounts of d