为什么我无法访问我的 node.js 基本公共 API？

Question

Whenever I try to accesse http://localhost:3000/api/courses it doesn't load at all, just hangs. I've had a similar problem with React routing not loading any subpages. I'm not sure what could be the reason. I am connected via mobile hotspot but I do not connect to the internet using a proxy.

I've tried different ports with the same result.

const http = require('http');

const server = http.createServer((req, res) => {
    if (req.url === '/') {
        res.write('Hello World');
        res.end();
    }

    if (req.url === '/api/courses') {
        res.write(JSON.stringify([1, 2, 3]));
        res.end();
    }
});

server.listen(3000);

console.log('Listening on port 3000...');

Expected result is to show me the array [1, 2, 3] . Actual result is that the page just hangs without loading.

Answer 1

No Changes, It is working fine in my pc, Try once in an incognito window or change port.

const http = require("http");

const server = http.createServer((req, res) => {
  if (req.url === "/") {
    res.write("Hello World");
    res.end();
  }

  if (req.url === "/api/courses") {
    res.write(JSON.stringify([1, 2, 3]));
    res.end();
  }
});

server.listen(8080);

console.log("Listening on port 8080...")

Check link - https://i.stack.imgur.com/R6mLQ.png

Answer 2

Because you are not returning the valid JSON object.

res.write(JSON.stringify([1, 2, 3]));

Try something like this

res.write(JSON.stringify({"result":[1, 2, 3])});