1 files changed, 137 insertions, 0 deletions
diff --git a/vanilla/node_modules/undici/lib/core/connect.js b/vanilla/node_modules/undici/lib/core/connect.js
new file mode 100644
index 0000000..a49af91
--- /dev/null
+++ b/vanilla/node_modules/undici/lib/core/connect.js
@@ -0,0 +1,137 @@
+'use strict'
+
+const net = require('node:net')
+const assert = require('node:assert')
+const util = require('./util')
+const { InvalidArgumentError } = require('./errors')
+
+let tls // include tls conditionally since it is not always available
+
+// TODO: session re-use does not wait for the first
+// connection to resolve the session and might therefore
+// resolve the same servername multiple times even when
+// re-use is enabled.
+
+const SessionCache = class WeakSessionCache {
+  constructor (maxCachedSessions) {
+    this._maxCachedSessions = maxCachedSessions
+    this._sessionCache = new Map()
+    this._sessionRegistry = new FinalizationRegistry((key) => {
+      if (this._sessionCache.size < this._maxCachedSessions) {
+        return
+      }
+
+      const ref = this._sessionCache.get(key)
+      if (ref !== undefined && ref.deref() === undefined) {
+        this._sessionCache.delete(key)
+      }
+    })
+  }
+
+  get (sessionKey) {
+    const ref = this._sessionCache.get(sessionKey)
+    return ref ? ref.deref() : null
+  }
+
+  set (sessionKey, session) {
+    if (this._maxCachedSessions === 0) {
+      return
+    }
+
+    this._sessionCache.set(sessionKey, new WeakRef(session))
+    this._sessionRegistry.register(session, sessionKey)
+  }
+}
+
+function buildConnector ({ allowH2, useH2c, maxCachedSessions, socketPath, timeout, session: customSession, ...opts }) {
+  if (maxCachedSessions != null && (!Number.isInteger(maxCachedSessions) || maxCachedSessions < 0)) {
+    throw new InvalidArgumentError('maxCachedSessions must be a positive integer or zero')
+  }
+
+  const options = { path: socketPath, ...opts }
+  const sessionCache = new SessionCache(maxCachedSessions == null ? 100 : maxCachedSessions)
+  timeout = timeout == null ? 10e3 : timeout
+  allowH2 = allowH2 != null ? allowH2 : false
+  return function connect ({ hostname, host, protocol, port, servername, localAddress, httpSocket }, callback) {
+    let socket
+    if (protocol === 'https:') {
+      if (!tls) {
+        tls = require('node:tls')
+      }
+      servername = servername || options.servername || util.getServerName(host) || null
+
+      const sessionKey = servername || hostname
+      assert(sessionKey)
+
+      const session = customSession || sessionCache.get(sessionKey) || null
+
+      port = port || 443
+
+      socket = tls.connect({
+        highWaterMark: 16384, // TLS in node can't have bigger HWM anyway...
+        ...options,
+        servername,
+        session,
+        localAddress,
+        ALPNProtocols: allowH2 ? ['http/1.1', 'h2'] : ['http/1.1'],
+        socket: httpSocket, // upgrade socket connection
+        port,
+        host: hostname
+      })
+
+      socket
+        .on('session', function (session) {
+          // TODO (fix): Can a session become invalid once established? Don't think so?
+          sessionCache.set(sessionKey, session)
+        })
+    } else {
+      assert(!httpSocket, 'httpSocket can only be sent on TLS update')
+
+      port = port || 80
+
+      socket = net.connect({
+        highWaterMark: 64 * 1024, // Same as nodejs fs streams.
+        ...options,
+        localAddress,
+        port,
+        host: hostname
+      })
+      if (useH2c === true) {
+        socket.alpnProtocol = 'h2'
+      }
+    }
+
+    // Set TCP keep alive options on the socket here instead of in connect() for the case of assigning the socket
+    if (options.keepAlive == null || options.keepAlive) {
+      const keepAliveInitialDelay = options.keepAliveInitialDelay === undefined ? 60e3 : options.keepAliveInitialDelay
+      socket.setKeepAlive(true, keepAliveInitialDelay)
+    }
+
+    const clearConnectTimeout = util.setupConnectTimeout(new WeakRef(socket), { timeout, hostname, port })
+
+    socket
+      .setNoDelay(true)
+      .once(protocol === 'https:' ? 'secureConnect' : 'connect', function () {
+        queueMicrotask(clearConnectTimeout)
+
+        if (callback) {
+          const cb = callback
+          callback = null
+          cb(null, this)
+        }
+      })
+      .on('error', function (err) {
+        queueMicrotask(clearConnectTimeout)
+
+        if (callback) {
+          const cb = callback
+          callback = null
+          cb(err)
+        }
+      })
+
+    return socket
+  }
+}
+
+module.exports = buildConnector