Function buildConnector

deps/undici/undici.js:3183–3255

({ allowH2, preferH2, useH2c, maxCachedSessions, socketPath, timeout, session: customSession, ...opts })

      }
    };
    function buildConnector({ allowH2, preferH2, 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 ? 1e4 : timeout;
      allowH2 = allowH2 != null ? allowH2 : true;
      return /* @__PURE__ */ __name(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 ? preferH2 ? ["h2", "http/1.1"] : ["http/1.1", "h2"] : ["http/1.1"],
            socket: httpSocket,
            // upgrade socket connection
            port,
            host: hostname
          });
          socket.on("session", function(session2) {
            sessionCache.set(sessionKey, session2);
          });
        } 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";
          }
        }
        if (options.keepAlive == null || options.keepAlive) {
          const keepAliveInitialDelay = options.keepAliveInitialDelay === void 0 ? 6e4 : 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) {