How to avoid security issues when uploading files by url?

Question

Laravel

At the moment, the functionality of loading images by url is required, before saving it to the server, I check it through this construction: How correct is this, and how can I avoid holes altogether? @exif_imagetype(Request::input('url')) === false

Answer 1

• Check response header
  
• mime content type
  

Another getimagesize to use when checking

Answer 2

First, never use @
Second, there is validation#rule-image