Node.js v24.18.1 documentation

Determining if crypto support is unavailable#

It is possible for Node.js to be built without including support for the node:crypto module. In such cases, attempting to import from https or calling require('node:https') will result in an error being thrown.

When using CommonJS, the error thrown can be caught using try/catch:

let https;
try {
  https = require('node:https');
} catch (err) {
  console.error('https support is disabled!');
} copy

When using the lexical ESM import keyword, the error can only be caught if a handler for process.on('uncaughtException') is registered before any attempt to load the module is made (using, for instance, a preload module).

When using ESM, if there is a chance that the code may be run on a build of Node.js where crypto support is not enabled, consider using the import() function instead of the lexical import keyword:

let https;
try {
  https = await import('node:https');
} catch (err) {
  console.error('https support is disabled!');
} copy

Class: https.Agent#

An Agent object for HTTPS similar to http.Agent. See https.request() for more information.

Like http.Agent, the createConnection(options[, callback]) method can be overridden to customize how TLS connections are established.

See agent.createConnection() for details on overriding this method, including asynchronous socket creation with a callback.

// ...
https.globalAgent.on('keylog', (line, tlsSocket) => {
  fs.appendFileSync('/tmp/ssl-keys.log', line, { mode: 0o600 });
}); copy

Class: https.Server#

• Extends: <tls.Server>

See http.Server for more information.

https.createServer([options][, requestListener])#

• options <Object> Accepts options from tls.createServer(), tls.createSecureContext() and http.createServer().
• requestListener <Function> A listener to be added to the 'request' event.
• Returns: <https.Server>

// curl -k https://localhost:8000/
import { createServer } from 'node:https';
import { readFileSync } from 'node:fs';

const options = {
  key: readFileSync('private-key.pem'),
  cert: readFileSync('certificate.pem'),
};

createServer(options, (req, res) => {
  res.writeHead(200);
  res.end('hello world\n');
}).listen(8000);// curl -k https://localhost:8000/
const https = require('node:https');
const fs = require('node:fs');

const options = {
  key: fs.readFileSync('private-key.pem'),
  cert: fs.readFileSync('certificate.pem'),
};

https.createServer(options, (req, res) => {
  res.writeHead(200);
  res.end('hello world\n');
}).listen(8000);