A pure lua module that detects the mime type of file based on their contents. Falls back to detecting based on extension for plain text files.

Tested on Lua 5.2 and Luajit 2.0. Should work with Lua 5.1 also.

The current version is: 1.0.1

Basic usage:

local puremagic = require('puremagic')
local mimetype = puremagic.via_path('/path/to/file')

When dealing with temp files, you may want to pass the original filename in case the extension is needed:

local puremagic = require('puremagic')
local mimetype = puremagic.via_path('/var/tmp/xyz', 'test.xlsx')

If you have the contents of the file in memory, you can provide those plus the filename:

local content = '#!/bin/bash\n'
local puremagic = require('puremagic')
local mimetype = puremagic.via_content(content, 'test.sh')

The following mime types are detected:

lua tests.lua

or

luajit tests.lua