package util

import "io"

// 桥接两个 IO 连接
func Bridge(conn1, conn2 io.ReadWriteCloser) error {
	defer conn1.Close()
	defer conn2.Close()

	errChan := make(chan error, 2)

	// Copy conn1 to conn2
	go func() {
		_, err := io.Copy(conn2, conn1)
		errChan <- err
	}()

	// Copy conn2 to conn1
	go func() {
		_, err := io.Copy(conn1, conn2)
		errChan <- err
	}()

	// Wait for either direction to finish or error
	return <-errChan
}