Add node modules and compiled JavaScript from main (#54)

Co-authored-by: Oliver King <oking3@uncc.edu>

node_modules/resolve-alpn/LICENSE

@@ -0,0 +1,22 @@
+MIT License
+
+Copyright (c) 2018 Szymon Marczak
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

node_modules/resolve-alpn/README.md

@@ -0,0 +1,60 @@
+# `resolve-alpn`
+
+[![Node CI](https://github.com/szmarczak/resolve-alpn/workflows/Node%20CI/badge.svg)](https://github.com/szmarczak/resolve-alpn/actions)
+[![codecov](https://codecov.io/gh/szmarczak/resolve-alpn/branch/master/graph/badge.svg)](https://codecov.io/gh/szmarczak/resolve-alpn)
+
+## API
+
+### resolveALPN(options, connect = tls.connect)
+
+Returns an object with an `alpnProtocol` property. The `socket` property may be also present.
+
+```js
+const result = await resolveALPN({
+	host: 'nghttp2.org',
+	port: 443,
+	ALPNProtocols: ['h2', 'http/1.1'],
+	servername: 'nghttp2.org'
+});
+
+console.log(result); // {alpnProtocol: 'h2'}
+```
+
+**Note:** While the `servername` option is not required in this case, many other servers do. It's best practice to set it anyway.
+
+**Note:** If the socket times out, the promise will resolve and `result.timeout` will be set to `true`.
+
+#### options
+
+Same as [TLS options](https://nodejs.org/api/tls.html#tls_tls_connect_options_callback).
+
+##### options.resolveSocket
+
+By default, the socket gets destroyed and the promise resolves.<br>
+If you set this to true, it will return the socket in a `socket` property.
+
+```js
+const result = await resolveALPN({
+	host: 'nghttp2.org',
+	port: 443,
+	ALPNProtocols: ['h2', 'http/1.1'],
+	servername: 'nghttp2.org',
+	resolveSocket: true
+});
+
+console.log(result); // {alpnProtocol: 'h2', socket: tls.TLSSocket}
+
+// Remember to destroy the socket if you don't use it!
+result.socket.destroy();
+```
+
+#### connect
+
+Type: `Function<TLSSocket> | AsyncFunction<TLSSocket>`\
+Default: [`tls.connect`](https://nodejs.org/dist/latest-v16.x/docs/api/tls.html#tls_tls_connect_options_callback)
+
+**Note:** No matter which function is used (synchronous or asynchronous), it **must** accept a `callback` function as a second argument. The `callback` function gets executed when the socket has successfully connected.
+
+## License
+
+MIT

node_modules/resolve-alpn/index.js

@@ -0,0 +1,43 @@
+'use strict';
+const tls = require('tls');
+
+module.exports = (options = {}, connect = tls.connect) => new Promise((resolve, reject) => {
+	let timeout = false;
+
+	let socket;
+
+	const callback = async () => {
+		await socketPromise;
+
+		socket.off('timeout', onTimeout);
+		socket.off('error', reject);
+
+		if (options.resolveSocket) {
+			resolve({alpnProtocol: socket.alpnProtocol, socket, timeout});
+
+			if (timeout) {
+				await Promise.resolve();
+				socket.emit('timeout');
+			}
+		} else {
+			socket.destroy();
+			resolve({alpnProtocol: socket.alpnProtocol, timeout});
+		}
+	};
+
+	const onTimeout = async () => {
+		timeout = true;
+		callback();
+	};
+
+	const socketPromise = (async () => {
+		try {
+			socket = await connect(options, callback);
+
+			socket.on('error', reject);
+			socket.once('timeout', onTimeout);
+		} catch (error) {
+			reject(error);
+		}
+	})();
+});

node_modules/resolve-alpn/package.json

@@ -0,0 +1,34 @@
+{
+    "name": "resolve-alpn",
+    "version": "1.2.1",
+    "description": "Detects the ALPN protocol",
+    "main": "index.js",
+    "scripts": {
+        "test": "xo && nyc --reporter=lcovonly --reporter=text --reporter=html ava"
+    },
+    "files": [
+        "index.js"
+    ],
+    "repository": {
+        "type": "git",
+        "url": "git+https://github.com/szmarczak/resolve-alpn.git"
+    },
+    "keywords": [
+        "alpn",
+        "tls",
+        "socket",
+        "http2"
+    ],
+    "author": "Szymon Marczak",
+    "license": "MIT",
+    "bugs": {
+        "url": "https://github.com/szmarczak/resolve-alpn/issues"
+    },
+    "homepage": "https://github.com/szmarczak/resolve-alpn#readme",
+    "devDependencies": {
+        "ava": "^3.15.0",
+        "nyc": "^15.1.0",
+        "pem": "1.14.3",
+        "xo": "^0.38.2"
+    }
+}