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HTTPS | Node.js v24.6.0 Documentation

Source Code: lib/https.js

HTTPS is the HTTP protocol over TLS/SSL. In Node.js this is implemented as a separate module.

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!');
} 

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!');
} 

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

• options <Object> Set of configurable options to set on the agent. Can have the same fields as for http.Agent(options), and

  • maxCachedSessions <number> maximum number of TLS cached sessions. Use 0 to disable TLS session caching. Default: 100.

  • servername <string> the value of Server Name Indication extension to be sent to the server. Use empty string '' to disable sending the extension. Default: host name of the target server, unless the target server is specified using an IP address, in which case the default is '' (no extension).

    See Session Resumption for information about TLS session reuse.

Added in: v13.2.0, v12.16.0

• line <Buffer> Line of ASCII text, in NSS SSLKEYLOGFILE format.
• tlsSocket <tls.TLSSocket> The tls.TLSSocket instance on which it was generated.

The keylog event is emitted when key material is generated or received by a connection managed by this agent (typically before handshake has completed, but not necessarily). This keying material can be stored for debugging, as it allows captured TLS traffic to be decrypted. It may be emitted multiple times for each socket.

A typical use case is to append received lines to a common text file, which is later used by software (such as Wireshark) to decrypt the traffic:

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

Added in: v0.3.4

• Extends: <tls.Server>

See http.Server for more information.

Calls server.close() and returns a promise that fulfills when the server has closed.

Starts the HTTPS server listening for encrypted connections. This method is identical to server.listen() from net.Server.

Added in: v0.3.4

• 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>

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);
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);

Or

import { createServer } from 'node:https';
import { readFileSync } from 'node:fs';

const options = {
  pfx: readFileSync('test_cert.pfx'),
  passphrase: 'sample',
};

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

const options = {
  pfx: fs.readFileSync('test_cert.pfx'),
  passphrase: 'sample',
};

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

To generate the certificate and key for this example, run:

openssl req -x509 -newkey rsa:2048 -nodes -sha256 -subj '/CN=localhost' \
  -keyout private-key.pem -out certificate.pem 

Then, to generate the pfx certificate for this example, run:

openssl pkcs12 -certpbe AES-256-CBC -export -out test_cert.pfx \
  -inkey private-key.pem -in certificate.pem -passout pass:sample 

• url <string> | <URL>
• options <Object> | <string> | <URL> Accepts the same options as https.request(), with the method set to GET by default.
• callback <Function>
• Returns: <http.ClientRequest>

Like http.get() but for HTTPS.

options can be an object, a string, or a URL object. If options is a string, it is automatically parsed with new URL(). If it is a URL object, it will be automatically converted to an ordinary options object.

import { get } from 'node:https';
import process from 'node:process';

get('https://encrypted.google.com/', (res) => {
  console.log('statusCode:', res.statusCode);
  console.log('headers:', res.headers);

  res.on('data', (d) => {
    process.stdout.write(d);
  });

}).on('error', (e) => {
  console.error(e);
});const https = require('node:https');

https.get('https://encrypted.google.com/', (res) => {
  console.log('statusCode:', res.statusCode);
  console.log('headers:', res.headers);

  res.on('data', (d) => {
    process.stdout.write(d);
  });

}).on('error', (e) => {
  console.error(e);
});

Global instance of https.Agent for all HTTPS client requests. Diverges from a default https.Agent configuration by having keepAlive enabled and a timeout of 5 seconds.

• url <string> | <URL>
• options <Object> | <string> | <URL> Accepts all options from http.request(), with some differences in default values:
  • protocol Default: 'https:'
  • port Default: 443
  • agent Default: https.globalAgent
• callback <Function>
• Returns: <http.ClientRequest>

Makes a request to a secure web server.

The following additional options from tls.connect() are also accepted: ca, cert, ciphers, clientCertEngine (deprecated), crl, dhparam, ecdhCurve, honorCipherOrder, key, passphrase, pfx, rejectUnauthorized, secureOptions, secureProtocol, servername, sessionIdContext, highWaterMark.

options can be an object, a string, or a URL object. If options is a string, it is automatically parsed with new URL(). If it is a URL object, it will be automatically converted to an ordinary options object.

https.request() returns an instance of the http.ClientRequest class. The ClientRequest instance is a writable stream. If one needs to upload a file with a POST request, then write to the ClientRequest object.

import { request } from 'node:https';
import process from 'node:process';

const options = {
  hostname: 'encrypted.google.com',
  port: 443,
  path: '/',
  method: 'GET',
};

const req = request(options, (res) => {
  console.log('statusCode:', res.statusCode);
  console.log('headers:', res.headers);

  res.on('data', (d) => {
    process.stdout.write(d);
  });
});

req.on('error', (e) => {
  console.error(e);
});
req.end();const https = require('node:https');

const options = {
  hostname: 'encrypted.google.com',
  port: 443,
  path: '/',
  method: 'GET',
};

const req = https.request(options, (res) => {
  console.log('statusCode:', res.statusCode);
  console.log('headers:', res.headers);

  res.on('data', (d) => {
    process.stdout.write(d);
  });
});

req.on('error', (e) => {
  console.error(e);
});
req.end();

Example using options from tls.connect():

const options = {
  hostname: 'encrypted.google.com',
  port: 443,
  path: '/',
  method: 'GET',
  key: fs.readFileSync('private-key.pem'),
  cert: fs.readFileSync('certificate.pem'),
};
options.agent = new https.Agent(options);

const req = https.request(options, (res) => {
  
}); 

Alternatively, opt out of connection pooling by not using an Agent.

const options = {
  hostname: 'encrypted.google.com',
  port: 443,
  path: '/',
  method: 'GET',
  key: fs.readFileSync('private-key.pem'),
  cert: fs.readFileSync('certificate.pem'),
  agent: false,
};

const req = https.request(options, (res) => {
  
}); 

Example using a URL as options:

const options = new URL('https://abc:xyz@example.com');

const req = https.request(options, (res) => {
  
}); 

Example pinning on certificate fingerprint, or the public key (similar to pin-sha256):

import { checkServerIdentity } from 'node:tls';
import { Agent, request } from 'node:https';
import { createHash } from 'node:crypto';

function sha256(s) {
  return createHash('sha256').update(s).digest('base64');
}
const options = {
  hostname: 'github.com',
  port: 443,
  path: '/',
  method: 'GET',
  checkServerIdentity: function(host, cert) {
    
    const err = checkServerIdentity(host, cert);
    if (err) {
      return err;
    }

    
    const pubkey256 = 'SIXvRyDmBJSgatgTQRGbInBaAK+hZOQ18UmrSwnDlK8=';
    if (sha256(cert.pubkey) !== pubkey256) {
      const msg = 'Certificate verification error: ' +
        `The public key of '${cert.subject.CN}' ` +
        'does not match our pinned fingerprint';
      return new Error(msg);
    }

    
    const cert256 = 'FD:6E:9B:0E:F3:98:BC:D9:04:C3:B2:EC:16:7A:7B:' +
      '0F:DA:72:01:C9:03:C5:3A:6A:6A:E5:D0:41:43:63:EF:65';
    if (cert.fingerprint256 !== cert256) {
      const msg = 'Certificate verification error: ' +
        `The certificate of '${cert.subject.CN}' ` +
        'does not match our pinned fingerprint';
      return new Error(msg);
    }

    
    
    
    
    
    let lastprint256;
    do {
      console.log('Subject Common Name:', cert.subject.CN);
      console.log('  Certificate SHA256 fingerprint:', cert.fingerprint256);

      const hash = createHash('sha256');
      console.log('  Public key ping-sha256:', sha256(cert.pubkey));

      lastprint256 = cert.fingerprint256;
      cert = cert.issuerCertificate;
    } while (cert.fingerprint256 !== lastprint256);

  },
};

options.agent = new Agent(options);
const req = request(options, (res) => {
  console.log('All OK. Server matched our pinned cert or public key');
  console.log('statusCode:', res.statusCode);

  res.on('data', (d) => {});
});

req.on('error', (e) => {
  console.error(e.message);
});
req.end();const tls = require('node:tls');
const https = require('node:https');
const crypto = require('node:crypto');

function sha256(s) {
  return crypto.createHash('sha256').update(s).digest('base64');
}
const options = {
  hostname: 'github.com',
  port: 443,
  path: '/',
  method: 'GET',
  checkServerIdentity: function(host, cert) {
    
    const err = tls.checkServerIdentity(host, cert);
    if (err) {
      return err;
    }

    
    const pubkey256 = 'SIXvRyDmBJSgatgTQRGbInBaAK+hZOQ18UmrSwnDlK8=';
    if (sha256(cert.pubkey) !== pubkey256) {
      const msg = 'Certificate verification error: ' +
        `The public key of '${cert.subject.CN}' ` +
        'does not match our pinned fingerprint';
      return new Error(msg);
    }

    
    const cert256 = 'FD:6E:9B:0E:F3:98:BC:D9:04:C3:B2:EC:16:7A:7B:' +
      '0F:DA:72:01:C9:03:C5:3A:6A:6A:E5:D0:41:43:63:EF:65';
    if (cert.fingerprint256 !== cert256) {
      const msg = 'Certificate verification error: ' +
        `The certificate of '${cert.subject.CN}' ` +
        'does not match our pinned fingerprint';
      return new Error(msg);
    }

    
    
    
    
    
    do {
      console.log('Subject Common Name:', cert.subject.CN);
      console.log('  Certificate SHA256 fingerprint:', cert.fingerprint256);

      hash = crypto.createHash('sha256');
      console.log('  Public key ping-sha256:', sha256(cert.pubkey));

      lastprint256 = cert.fingerprint256;
      cert = cert.issuerCertificate;
    } while (cert.fingerprint256 !== lastprint256);

  },
};

options.agent = new https.Agent(options);
const req = https.request(options, (res) => {
  console.log('All OK. Server matched our pinned cert or public key');
  console.log('statusCode:', res.statusCode);

  res.on('data', (d) => {});
});

req.on('error', (e) => {
  console.error(e.message);
});
req.end();

Outputs for example:

Subject Common Name: github.com
  Certificate SHA256 fingerprint: FD:6E:9B:0E:F3:98:BC:D9:04:C3:B2:EC:16:7A:7B:0F:DA:72:01:C9:03:C5:3A:6A:6A:E5:D0:41:43:63:EF:65
  Public key ping-sha256: SIXvRyDmBJSgatgTQRGbInBaAK+hZOQ18UmrSwnDlK8=
Subject Common Name: Sectigo ECC Domain Validation Secure Server CA
  Certificate SHA256 fingerprint: 61:E9:73:75:E9:F6:DA:98:2F:F5:C1:9E:2F:94:E6:6C:4E:35:B6:83:7C:E3:B9:14:D2:24:5C:7F:5F:65:82:5F
  Public key ping-sha256: Eep0p/AsSa9lFUH6KT2UY+9s1Z8v7voAPkQ4fGknZ2g=
Subject Common Name: USERTrust ECC Certification Authority
  Certificate SHA256 fingerprint: A6:CF:64:DB:B4:C8:D5:FD:19:CE:48:89:60:68:DB:03:B5:33:A8:D1:33:6C:62:56:A8:7D:00:CB:B3:DE:F3:EA
  Public key ping-sha256: UJM2FOhG9aTNY0Pg4hgqjNzZ/lQBiMGRxPD5Y2/e0bw=
Subject Common Name: AAA Certificate Services
  Certificate SHA256 fingerprint: D7:A7:A0:FB:5D:7E:27:31:D7:71:E9:48:4E:BC:DE:F7:1D:5F:0C:3E:0A:29:48:78:2B:C8:3E:E0:EA:69:9E:F4
  Public key ping-sha256: vRU+17BDT2iGsXvOi76E7TQMcTLXAqj0+jGPdW7L1vM=
All OK. Server matched our pinned cert or public key
statusCode: 200 

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