使用 API 返回图像 - 纯 NodeJS（无 Express）

Question

I am trying to return an image when a user connects to the server ip address, in short, create an API that returns an image.

I had found this solution that worked however now I don't know why it doesn't work.

I don't want to use Express or similar.

UPDATE

Without res.end() it works, but I don't understand why.

import http from 'http';
import mime from 'mime';
import fs from 'fs';

const hostname = '127.0.0.1';
const port = 8000;

const server = http.createServer((req, res) => {
    res.writeHead(200, { 'content-type': mime.getType('./tmp/screenshot.png') });
    fs.createReadStream('./tmp/screenshot.png').pipe(res);
    res.end();
});

server.listen(port, hostname, () => {
    console.log(`Server running at http://${hostname}:${port}/`);
});

Answer 1

in:

 fs.createReadStream('./tmp/screenshot.png').pipe(res);

you already add a pipe to send data between the server and the client and after finishing sending data, it automatically triggers the end() event. if you don't want this behavior. just do this

 fs.createReadStream('./tmp/screenshot.png').pipe(res, {end:false});

I hope it's help you:)