Writing base 64 encoded images to files
This snippet describes the way you can save an image to a file. A base 64 encoded image tipically comes from a renderer video element.
The following snippet uses Node.js 8.
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| 'use strict';
const util = require('util');
const fs = require('fs');
const write = util.promisify(fs.writeFile);
module.exports = ({ image, identifier, directory }) => {
try {
const extension = image.split(';')[0].match(/jpeg|png|gif/)[0];
const data = image.replace(/^data:image\/\w+;base64,/, '');
const encoding = 'base64';
const file = `${identifier}.${extension}`;
const path = path.join(directory, file);
await writeFile(path, data, encoding);
return path;
} catch (error){
console.error(error);
return null;
}
}
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Parsing base 64 encoded images from array buffers to video src
If you are storing base 64 encoded images in a database you can turn them into data blobs to set them as img tag source the following way.
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'use strict';
module.exports = (input, opts) => {
if (!input) return;
let arrayBufferView = new Uint8Array( input );
let blob = new Blob( [ arrayBufferView ], { type: opts || "image/jpg" } );
let urlCreator = window.URL || window.webkitURL;
return urlCreator.createObjectURL(blob);
};
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