# HTTPS

<!--introduced_in=v0.10.0-->

> Stability: 2 - Stable

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

## Class: https.Agent
<!-- YAML
added: v0.4.5
changes:
  - version: v2.5.0
    pr-url: https://github.com/nodejs/node/pull/2228
    description: parameter `maxCachedSessions` added to `options` for TLS
                 sessions reuse.
  - version: v5.3.0
    pr-url: https://github.com/nodejs/node/pull/4252
    description: support `0` `maxCachedSessions` to disable TLS session caching.
-->

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

### new Agent([options])

* `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`.

    See [`Session Resumption`][] for infomation about TLS session reuse.

## Class: https.Server
<!-- YAML
added: v0.3.4
-->

This class is a subclass of `tls.Server` and emits events same as
[`http.Server`][]. See [`http.Server`][] for more information.

### server.close([callback])
<!-- YAML
added: v0.1.90
-->
* `callback` {Function}
* Returns: {https.Server}

See [`server.close()`][`http.close()`] from the HTTP module for details.

### server.headersTimeout
<!-- YAML
added: v11.3.0
-->
- {number} **Default:** `40000`

See [`http.Server#headersTimeout`][].

### server.listen()

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


### server.maxHeadersCount

- {number} **Default:** `2000`

See [`http.Server#maxHeadersCount`][].

### server.setTimeout([msecs][, callback])
<!-- YAML
added: v0.11.2
-->
* `msecs` {number} **Default:** `120000` (2 minutes)
* `callback` {Function}
* Returns: {https.Server}

See [`http.Server#setTimeout()`][].

### server.timeout
<!-- YAML
added: v0.11.2
-->
- {number} **Default:** `120000` (2 minutes)

See [`http.Server#timeout`][].

### server.keepAliveTimeout
<!-- YAML
added: v8.0.0
-->
- {number} **Default:** `5000` (5 seconds)

See [`http.Server#keepAliveTimeout`][].

## https.createServer([options][, requestListener])
<!-- YAML
added: 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}

```js
// curl -k https://localhost:8000/
const https = require('https');
const fs = require('fs');

const options = {
  key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
  cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem')
};

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

Or

```js
const https = require('https');
const fs = require('fs');

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

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

## https.get(options[, callback])
## https.get(url[, options][, callback])
<!-- YAML
added: v0.3.6
changes:
  - version: v10.9.0
    pr-url: https://github.com/nodejs/node/pull/21616
    description: The `url` parameter can now be passed along with a separate
                 `options` object.
  - version: v7.5.0
    pr-url: https://github.com/nodejs/node/pull/10638
    description: The `options` parameter can be a WHATWG `URL` object.
-->
* `url` {string | URL}
* `options` {Object | string | URL} Accepts the same `options` as
  [`https.request()`][], with the `method` always set to `GET`.
* `callback` {Function}

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.

```js
const https = require('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);
});
```

## https.globalAgent
<!-- YAML
added: v0.5.9
-->

Global instance of [`https.Agent`][] for all HTTPS client requests.

## https.request(options[, callback])
## https.request(url[, options][, callback])
<!-- YAML
added: v0.3.6
changes:
  - version: v10.9.0
    pr-url: https://github.com/nodejs/node/pull/21616
    description: The `url` parameter can now be passed along with a separate
                 `options` object.
  - version: v9.3.0
    pr-url: https://github.com/nodejs/node/pull/14903
    description: The `options` parameter can now include `clientCertEngine`.
  - version: v7.5.0
    pr-url: https://github.com/nodejs/node/pull/10638
    description: The `options` parameter can be a WHATWG `URL` object.
-->
* `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}

Makes a request to a secure web server.

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

`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.

```js
const https = require('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()`][]:

```js
const options = {
  hostname: 'encrypted.google.com',
  port: 443,
  path: '/',
  method: 'GET',
  key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
  cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem')
};
options.agent = new https.Agent(options);

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

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

```js
const options = {
  hostname: 'encrypted.google.com',
  port: 443,
  path: '/',
  method: 'GET',
  key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
  cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem'),
  agent: false
};

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

Example using a [`URL`][] as `options`:

```js
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`):

```js
const tls = require('tls');
const https = require('https');
const crypto = require('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) {
    // Make sure the certificate is issued to the host we are connected to
    const err = tls.checkServerIdentity(host, cert);
    if (err) {
      return err;
    }

    // Pin the public key, similar to HPKP pin-sha25 pinning
    const pubkey256 = 'pL1+qb9HTMRZJmuC/bB/ZI9d302BYrrqiVuRyW+DGrU=';
    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);
    }

    // Pin the exact certificate, rather then the pub key
    const cert256 = '25:FE:39:32:D9:63:8C:8A:FC:A1:9A:29:87:' +
      'D8:3E:4C:1D:98:DB:71:E4:1A:48:03:98:EA:22:6A:BD:8B:93:16';
    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);
    }

    // This loop is informational only.
    // Print the certificate and public key fingerprints of all certs in the
    // chain. Its common to pin the public key of the issuer on the public
    // internet, while pinning the public key of the service in sensitive
    // environments.
    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);
  // Print the HPKP values
  console.log('headers:', res.headers['public-key-pins']);

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

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

Outputs for example:

```text
Subject Common Name: github.com
  Certificate SHA256 fingerprint: 25:FE:39:32:D9:63:8C:8A:FC:A1:9A:29:87:D8:3E:4C:1D:98:DB:71:E4:1A:48:03:98:EA:22:6A:BD:8B:93:16
  Public key ping-sha256: pL1+qb9HTMRZJmuC/bB/ZI9d302BYrrqiVuRyW+DGrU=
Subject Common Name: DigiCert SHA2 Extended Validation Server CA
  Certificate SHA256 fingerprint: 40:3E:06:2A:26:53:05:91:13:28:5B:AF:80:A0:D4:AE:42:2C:84:8C:9F:78:FA:D0:1F:C9:4B:C5:B8:7F:EF:1A
  Public key ping-sha256: RRM1dGqnDFsCJXBTHky16vi1obOlCgFFn/yOhI/y+ho=
Subject Common Name: DigiCert High Assurance EV Root CA
  Certificate SHA256 fingerprint: 74:31:E5:F4:C3:C1:CE:46:90:77:4F:0B:61:E0:54:40:88:3B:A9:A0:1E:D0:0B:A6:AB:D7:80:6E:D3:B1:18:CF
  Public key ping-sha256: WoiWRyIOVNa9ihaBciRSC7XHjliYS9VwUGOIud4PB18=
All OK. Server matched our pinned cert or public key
statusCode: 200
headers: max-age=0; pin-sha256="WoiWRyIOVNa9ihaBciRSC7XHjliYS9VwUGOIud4PB18="; pin-sha256="RRM1dGqnDFsCJXBTHky16vi1obOlCgFFn/yOhI/y+ho="; pin-sha256="k2v657xBsOVe1PQRwOsHsw3bsGT2VzIqz5K+59sNQws="; pin-sha256="K87oWBWM9UZfyddvDfoxL+8lpNyoUB2ptGtn0fv6G2Q="; pin-sha256="IQBnNBEiFuhj+8x6X8XLgh01V9Ic5/V3IRQLNFFc7v4="; pin-sha256="iie1VXtL7HzAMF+/PVPR9xzT80kQxdZeJ+zduCB3uj0="; pin-sha256="LvRiGEjRqfzurezaWuj8Wie2gyHMrW5Q06LspMnox7A="; includeSubDomains
```

[`Agent`]: #https_class_https_agent
[`URL`]: url.html#url_the_whatwg_url_api
[`http.Agent`]: http.html#http_class_http_agent
[`http.Agent(options)`]: http.html#http_new_agent_options
[`http.Server#headersTimeout`]: http.html#http_server_headerstimeout
[`http.Server#keepAliveTimeout`]: http.html#http_server_keepalivetimeout
[`http.Server#maxHeadersCount`]: http.html#http_server_maxheaderscount
[`http.Server#setTimeout()`]: http.html#http_server_settimeout_msecs_callback
[`http.Server#timeout`]: http.html#http_server_timeout
[`http.Server`]: http.html#http_class_http_server
[`http.close()`]: http.html#http_server_close_callback
[`http.createServer()`]: http.html#http_http_createserver_options_requestlistener
[`http.get()`]: http.html#http_http_get_options_callback
[`http.request()`]: http.html#http_http_request_options_callback
[`https.Agent`]: #https_class_https_agent
[`https.request()`]: #https_https_request_options_callback
[`net.Server`]: net.html#net_class_net_server
[`new URL()`]: url.html#url_constructor_new_url_input_base
[`server.listen()`]: net.html#net_server_listen
[`tls.connect()`]: tls.html#tls_tls_connect_options_callback
[`tls.createSecureContext()`]: tls.html#tls_tls_createsecurecontext_options
[`tls.createServer()`]: tls.html#tls_tls_createserver_options_secureconnectionlistener
[`Session Resumption`]: tls.html#tls_session_resumption