84 lines
1.7 KiB
Go
84 lines
1.7 KiB
Go
package main
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import (
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"bytes"
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"fmt"
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"net"
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"os/exec"
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"strings"
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)
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func getSupabaseURL() string {
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// 获取默认网关 IP
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gatewayIP, err := getDefaultGateway()
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if err != nil {
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fmt.Println("⚠️ 获取默认网关失败，使用 fallback:", err)
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return "http://localhost:8000"
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}
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// 获取所有本地网卡 IP 和子网
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ifaces, err := net.Interfaces()
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if err != nil {
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fmt.Println("⚠️ 获取本地接口失败:", err)
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return "http://localhost:8000"
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}
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for _, iface := range ifaces {
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if (iface.Flags&net.FlagUp == 0) || (iface.Flags&net.FlagLoopback != 0) {
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continue // 跳过不活跃或loopback接口
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}
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addrs, err := iface.Addrs()
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if err != nil {
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continue
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}
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for _, addr := range addrs {
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ipNet, ok := addr.(*net.IPNet)
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if !ok || ipNet.IP.To4() == nil {
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continue
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}
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// 检查网关是否在这个接口的子网中
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if ipNet.Contains(gatewayIP) {
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// 找到同网段的IP
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return fmt.Sprintf("http://%s:8000", ipNet.IP.String())
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}
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}
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}
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// 如果没有匹配的网段，使用 fallback
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return "http://localhost:8000"
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}
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func getDefaultGateway() (net.IP, error) {
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// 调用 Linux 命令获取默认路由
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cmd := exec.Command("ip", "route", "show", "default")
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var out bytes.Buffer
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cmd.Stdout = &out
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err := cmd.Run()
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if err != nil {
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return nil, err
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}
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lines := strings.Split(out.String(), "\n")
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for _, line := range lines {
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if strings.HasPrefix(line, "default") {
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fields := strings.Fields(line)
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for i, f := range fields {
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if f == "via" && i+1 < len(fields) {
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return net.ParseIP(fields[i+1]), nil
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}
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}
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}
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}
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return nil, fmt.Errorf("default gateway not found")
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}
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func main() {
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supabaseURL := getSupabaseURL()
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fmt.Printf("\"SUPABASE_URL\": \"%s\"\n", supabaseURL)
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}
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