Function proxyWebSocket

scripts/proxy-utils.mjs:113–145

(req, socket, head, target)

  }

  function proxyWebSocket(req, socket, head, target) {
    metrics.activeWebSockets += 1;
    metrics.totalWebSockets += 1;
    const finish = once(() => {
      metrics.activeWebSockets = Math.max(0, metrics.activeWebSockets - 1);
    });
    socket.on("close", finish);
    socket.on("error", finish);

    try {
      proxy.ws(req, socket, { target }, head).catch((err) => {
        metrics.totalErrors += 1;
        if (!isBenignSocketError(err)) {
          console.error(
            `[${label}] WebSocket proxy error for ${req.url} -> ${target}:`,
            err,
          );
        }
        socket.destroy();
        finish();
      });
    } catch (err) {
      metrics.totalErrors += 1;
      if (!isBenignSocketError(err)) {
        console.error(
          `[${label}] WebSocket proxy error for ${req.url} -> ${target}:`,
          err,
        );
      }
      socket.destroy();
      finish();
    }
  }

  function dumpMetrics() {
    console.log(