Utilizing Google Cloud Functions for automated binary responses

I need to send a binary response (image) using Google Cloud Functions.

My attempted solution is:

// .ts
import {Request, Response} from "express";

export function sendGif(req: Request, res: Response) {
    res.contentType("image/gif");
    res.send(new Buffer("[Base64 encoded image data goes here]", "base64"));
}

However, the response from this function looks like this:

{"type":"Buffer","data":[71,73,...]} // not binary, but JSON

This code works well with Express, but it doesn't function properly with Cloud Functions. Is this a bug, or is there a different approach I should take?

typescriptgoogle-cloud-platformgoogle-cloud-functions

Answer №1

After some careful commenting, I was able to successfully resolve the issue and come up with the following final code snippets:

Finalized Code:

import {Request, Response} from "express";

export function track(req: Request, res: Response) {
    const data = new Buffer("[Image data encoded in base64 goes here]", "base64");
    res.writeHead(200, {"Content-Type": "image/gif"});
    res.write(data.toString("binary"), "binary");
    res.end();
}

My goal was to create a tracking function that is independent of JavaScript, with the response image being small in size and lacking meaning.

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