javascript - Set custom header for the request made from <img/> tag

Question

Let's say I have a code like this:

<img src='images/whatever.jpj' width='' height=''/>

How to configure custom headers for this request?

Will appreciate any help.

Answer 1

I'm late here, but you can do this with XMLHttpRequest and a blob.

var xhr = new XMLHttpRequest();
xhr.responseType = 'blob'; //so you can access the response like a normal URL
xhr.onreadystatechange = function () {
    if (xhr.readyState == XMLHttpRequest.DONE && xhr.status == 200) {
        var img = document.createElement('img');
        img.src = URL.createObjectURL(xhr.response); //create <img> with src set to the blob
        document.body.appendChild(img);
    }
};
xhr.open('GET', 'http://images.example.com/my_secure_image.png', true);
xhr.setRequestHeader('SecretPassword', 'password123');
xhr.send();

If you want, you could check to make sure the blob's MIME type is an image.