如何使用 Express Validator 验证图像扩展？

Question

Good nigth to everyone. Im just finishing my first course to start programming and Im having lot of problems to validate an image extension using express-validator.

I need to validate an image to be "PNG", "JPEG", "JPG", or "GIF". I tried a few things but nothing worked. Some advice will be great for me, thank you in advanced.

Answer 1

validator包更适合这些东西，你可以使用isIn

req.checkBody( "your extension" ).isIn([ "PNG", "JPEG", "GIF" ]);