Ant-Browser/backend/internal/proxy/speedtest_fallback.go

package proxy

import (
	"fmt"
	"net"
	"time"

	"ant-chrome/backend/internal/logger"
)

// ─── TCP Ping 降级 ───

func tcpPingFallback(proxyId, src string, timeout time.Duration, log *logger.Logger) TestResult {
	endpoint, err := proxyEndpoint(src)
	if err != nil {
		return TestResult{ProxyId: proxyId, Ok: false, Error: fmt.Sprintf("无法解析代理地址: %v", err)}
	}

	start := time.Now()
	conn, err := net.DialTimeout("tcp", endpoint, timeout)
	latency := time.Since(start).Milliseconds()

	if err != nil {
		return TestResult{ProxyId: proxyId, Ok: false, LatencyMs: latency, Engine: "tcp", Error: fmt.Sprintf("TCP 连接失败: %v", err)}
	}
	conn.Close()
	return TestResult{ProxyId: proxyId, Ok: true, LatencyMs: latency, Engine: "tcp"}
}