opensandbox-group--opensandbox/components/egress/pkg/mitmproxy/wait.go

// Copyright 2026 Alibaba Group Holding Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package mitmproxy

import (
	"fmt"
	"net"
	"time"
)

// WaitListenPort polls until addr accepts TCP or d elapses.
func WaitListenPort(addr string, d time.Duration) error {
	deadline := time.Now().Add(d)
	for time.Now().Before(deadline) {
		c, err := net.DialTimeout("tcp", addr, 150*time.Millisecond)
		if err == nil {
			_ = c.Close()
			return nil
		}
		time.Sleep(40 * time.Millisecond)
	}
	return fmt.Errorf("timeout waiting for %s", addr)
}