tableflip/isjpeg

Name: isjpeg

Owner: TABLEFLIP

Description: :rainbow: is that file really (probably) a jpeg?

Created: 2015-07-05 23:13:39.0

Updated: 2015-07-05 23:34:10.0

Pushed: 2015-07-05 23:32:53.0

Homepage:

Size: 504

Language: JavaScript

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README

isjpeg

is that file really (probably) a jpeg?

Check the first 2 bytes of the file header to see if it's a JPEG

For when you just don't trust file extensions anymore.

Usage

module

npm install isjpeg

isJpeg = require('isjpeg')

eg('/path/to/mysterious/file', function (err, jpeg) {
 (err) throw err
 (jpeg) {
console.log('file is totes JPEG.')
else {
console.log('ceci n\'est pas une JPEG.')  

command line

npm install -g isjpeg

eg ~/Pictures/
rs/oli/Pictures/MagrittePipe.jpg is JPEG

References

• http://www.mikekunz.com/image_file_header.html
• http://stackoverflow.com/questions/772388/c-sharp-how-can-i-test-a-file-is-a-jpeg
• https://github.com/threatstack/libmagic/blob/master/magic/Magdir/jpeg#L12