Write base64 btoa to file using nodejs

Question

I am reeving a large base64 that looks something like this in my Nodejs server. This was sent by converting a PDF to base64 from my front end

data:application/pdf;base64,JVBERi0xLjMKMyAwIG9iago8PC9UeXBlIC9QYWdlCi9QYXJlbnQgMSAwIFIKL1Jlc291cmNlcyAyIDAgUgovTWVkaWFCb3ggWzAgMCA1....

Is there a way to save to base64 as a file now using Nodejs?

Are you asking how to convert the dataurl back into a PDF and save it to a file? — Jake Holzinger, Dec 27 '19 at 22:42
Does this answer your question? [How do I parse a data URL in Node?](https://stackoverflow.com/questions/11335460/how-do-i-parse-a-data-url-in-node) — Jake Holzinger, Dec 27 '19 at 22:55

score 0 · Answer 1 · answered Dec 28 '19 at 20:56

The idea is to decode the base64 string as binary

var bin = Base64.atob(stringToDecode);
// Your code to handle binary data
fs.writeFile('result_binary.pdf', bin, 'binary', error => {
    if (error) {
        throw error;
    } else {
        console.log('binary saved!');
    }
});

referece: Decoding Base64 pdf giving broken file

Write base64 btoa to file using nodejs

1 Answers1