In this article we are going to make a simple nodejs API endpoint that streams an mp3 file hosted on publicly anywhere example:
- Amazon S3
- Cloudinary
- Megaphone
- Public mp3 file
Prerequisites
- Nodejs Basics
- Used Axios request library
- Express basics
- Hosted audio
Note: This is not a scalable way to stream audio, there are better ways by handling the streaming using HLS and FFmpeg on a server somewhere. You can use this script to stream and binge your favorite podcast.
Let's get started
First, we need to setup our project:
yarn init
Fill out the prompts or just work with the default values by adding -y argument at the end.
Next, we need to install relevant npm packages
yarn add express axios
Let's create our endpoint
// We will use this to make HTTP request to the mp3 link
const axios = require("axios");
// adapters are axios modules that handle dispatching a request and settling a returned Promise once a response is received.
const httpAdapter = require("axios/lib/adapters/http");
// express is lightweight web framework
const express = require("express");
// Initialize express and assign to variable app
const app = express();
const INPUT =
"https://dcs.megaphone.fm/ADV3183643348.mp3?key=c3dc25ae82cc18218902aa6a0675798a";
app.get("/audio", (req, res) => {
axios
.get(INPUT, { responseType: "stream", adapter: httpAdapter, 'Content-Range': 'bytes 16561-8065611' })
.then((Response) => {
const stream = Response.data;
res.set("content-type", "audio/mp3");
res.set("accept-ranges", "bytes");
res.set("content-length", Response.headers["content-length"]);
console.log(Response);
stream.on("data", (chunk) => {
res.write(chunk);
});
stream.on("error", (err) => {
res.sendStatus(404);
});
stream.on("end", () => {
res.end();
});
})
.catch((Err) => {
console.log(Err.message);
});
});
app.listen(4000, () => {
console.log("Server is running");
});
Top comments (2)
Rather than a "continue here" link, it would be better to have all the information here too :)
My blog has pretty dead for a while, but I will soon move them here