CODEWITHSUNDEEP
node.jsexpress
user3569641
user3569641

Reputation: 922

Determine if a file is really an image in express/node.js

How can I check if the file uploaded on my server is really an image? Not just a file with (jpg,png,gif) extension just to make it as "an image" file. I created an image compression service using imagemin, but I'm afraid if the uploaded file is really an image.

Upvotes: 19

Views: 27662

Answers (3)

BenO
BenO

Reputation: 338

Another option is https://github.com/sindresorhus/image-type. Looks like mmmagic relies on libmagic which is a C lib and might be a lot to pull in...

Upvotes: 3

Vyacheslav
Vyacheslav

Reputation: 27221

Mime types are not useful. Try magic numbers or purely try to open the file. Read with link for more details. https://stackoverflow.com/a/8475542/1979882

http://www.astro.keele.ac.uk/oldusers/rno/Computing/File_magic.html#Image

Upvotes: 1

Dimitri
Dimitri

Reputation: 1208

I have used the mmmagic module for this, it discovers mime types: mmmagic on Github

Upvotes: 8

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