image-type识别图片真实类型

1. Install

npm install --save image-type
npm install read-chunk

2. Usage

let readChunk = require('read-chunk');
let imageType = require('image-type');

let image_path = 'avatar.png'
let buffer = readChunk.sync(image_path, 0, image_path.length);
let image_type = imageType(buffer);

if (image_type)
   //=> {ext: 'png', mime: 'image/png'}
   console.log('avatar.png is an image');
else
   console.log('avatar.png is not an image');