download-md5

download-md5 is a simple utility to download files via HTTP, and optionally check their MD5 as it goes. It will download to a temporary file "next to" the final file, with an extension of .download. Once the file is completely downloaded, with no errors, then it will move the temporary file into place.

You can also call download-md5 from the command line, by installing it globally.

var download = require('download-md5')

var url = 'https://pbs.twimg.com/profile_images/616542814319415296/McCTpH_E.jpg'
download(url, 'results/grumpy_cat.jpg', { md5: 'dc3637149942510755db677cb1d1574e' }, function(err) {
  if (err)
    console.log(err)
  else
    console.log("Done")
})

Command line usage

Installation via npm:

 npm install download-md5 -g

Usage:

 download-md5 <from_url> <to_file> [md5]

download(from_url, to_file, [opts])

from_url is the URL to download from. It may be http or https, and may contain basic auth.

to_file is the output filename. The directory will be created using mkdirp if it does not exist.

opts is optional, and can have:

• md5 - check the MD5 against a known MD5, and only consider the download successful if it matches
• finalize - defaults to true. If set to false, then the output file will remain with the .download suffix. Call download.finalizeDownload(to_file, cb) to finish the job.
• anything else is passed to request, e.g. timeout

License

ISC