To get image from web and encode with base64 with Node.js, we call the axios.get method.
For instance, we write
const axios = require("axios");
//...
const image = await axios.get(url, { responseType: "arraybuffer" });
const raw = Buffer.from(image.data).toString("base64");
const base64Image = "data:" + image.headers["content-type"] + ";base64," + raw;
to call axios.get to get the image from url with a get request.
We get the response as an arraybuffer with { responseType: "arraybuffer" }.
Then we call Buffer.from to convert the arraybuffer to a buffer.
And we call toString with 'base64' to convert it to a base64 string.
Then we put the content type string before the string.
