CODEWITHSUNDEEP
node.jsexpress
John Smith
John Smith

Reputation: 6259

Express send base-64 encoded png-image

In my node.js app I`m trying to respond with an image.

This image was saved before postgresql as text.

The text looks just like this:

data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAPAAAAE

But when I try to return it as an image:

    res.type('image/png');
    res.send(image_string);

Or binary:

     res.send(image_string,'binary');

It shows a empty image-element: enter image description here

What do I wrong?Thanks

Upvotes: 7

Views: 16575

Answers (1)

John Smith
John Smith

Reputation: 6259

I solved it by using a buffer:

const im = image_string.split(",")[1];

const img = Buffer.from(im, 'base64');

res.writeHead(200, {
   'Content-Type': 'image/png',
   'Content-Length': img.length
});

res.end(img);

Upvotes: 29

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