image url showing cors error in angular but working fine javascript

Question

we have used aws s3 for image storing. When we tried convert image to base64. code working fine javascript but code is not angular

javascript code:

function getBase64Image(imgUrl, callback) {
    var img = new Image();
    // onload fires when the image is fully loadded, and has width and height
    img.onload = function(){
      var canvas = document.createElement("canvas");
      canvas.width = img.width;
      canvas.height = img.height;
      var ctx = canvas.getContext("2d");
      ctx.drawImage(img, 0, 0);
      var dataURL = canvas.toDataURL("image/png"),
          dataURL = dataURL.replace(/^data:image\/(png|jpg);base64,/, "");

      callback(dataURL); // the base64 string

    };

    // set attributes and src 
    img.setAttribute('crossOrigin', 'anonymous'); //
    img.src = imgUrl;

}
this.getBase64Image("imageURL", function(base64image){
     console.log(base64image);
});

It is working fine in javascript but angular throws below error

Access to image at 'https://examplecros.s3.us-east-2.amazonaws.com/images5.jpg' from origin 'http//localhost:4200' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. 5.jpg:1
Failed to load resource: net::ERR_FAILED

Kamal24h · Accepted Answer · 2022-04-09 11:08:23Z

1

AWS S3 and your local are 2 different domains and you have already consider to set its corresponding property:

img.crossOrigin = 'Anonymous'.

Also, you have to config cross domain setting in your backend by this syntax:

CORS_ORIGIN_ALLOW_ALL = True.

If the problem exist yet, try adding a random parameter to your image URL to avoid your app getting the img from local cache:

img.src = imgUrl + '?r=' + Math.floor(Math.random()*100000);

I used the above steps and solved my problem witch was similar to yours.

reference

answered Apr 9, 2022 at 11:08

Kamal24h

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mark_dot · Accepted Answer · 2024-02-16 02:47:45Z

0

This is a security restriction from the browser because the origins are different. You can do the following workarounds to do this.

add,

img.crossOrigin = '*'

and try using pre-signed URL for the object in s3(as image src) instead of direct url

answered Feb 16, 2024 at 2:47

mark_dot

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