Check if the given URL is an image

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Check if the given URL is an image

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#1 by (3 votes)

1

I'm doing an application in Node.js, and I want to make a custom background system using the URL given by the user, I would like to know how to check if the URL given by the user is an image, and if it is not , the application gives return .

javascript node.js

asked by anonymous 07.06.2017 / 23:02

1 answer

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score 3 · Answer 1

You can use file-type :

npm install file-type

Sample code:

const http = require('http');
const fileType = require('file-type');
const url = 'http://cdn.sstatic.net/stackexchange/img/logos/so/so-logo.png';

http.get(url, res => {
    res.once('data', chunk => {
        res.destroy();
        console.log(fileType(chunk));
    });
});

Result:
{ext: 'png', mime: 'image / png'}

A way to check if url contains the image in the format you want:

if (!(fileType(chunk).ext == "png")) {
    console.log("deu ruim");
    // aqui vem o seu return
}

Example taken from here .