Make built exe a one-run Windows installer pointing at LAN dashboard.

Install copies miner to AppData, registers autostart, relaunches silently, and builder defaults server URL to local IP.

server/internal/api/server_info.go

@@ -0,0 +1,115 @@
+package api
+
+import (
+	"net"
+	"net/http"
+	"strings"
+)
+
+type ServerInfo struct {
+	Port         int      `json:"port"`
+	Host         string   `json:"host"`
+	LocalIPs     []string `json:"local_ips"`
+	SuggestedURL string   `json:"suggested_url"`
+	DashboardURL string   `json:"dashboard_url"`
+	WebSocketURL string   `json:"websocket_url"`
+}
+
+func (h *Handler) GetServerInfo(w http.ResponseWriter, r *http.Request) {
+	host := r.Host
+	if idx := strings.Index(host, ":"); idx > 0 {
+		host = host[:idx]
+	}
+
+	localIPs := listLocalIPv4()
+	suggestedHost := host
+	if isLoopbackHost(host) && len(localIPs) > 0 {
+		suggestedHost = localIPs[0]
+	}
+
+	port := 8989
+	if idx := strings.LastIndex(r.Host, ":"); idx > 0 {
+		if p := r.Host[idx+1:]; p != "" {
+			port = parsePort(p)
+		}
+	}
+
+	suggestedURL := "http://" + net.JoinHostPort(suggestedHost, itoa(port))
+	info := ServerInfo{
+		Port:         port,
+		Host:         host,
+		LocalIPs:     localIPs,
+		SuggestedURL: suggestedURL,
+		DashboardURL: suggestedURL,
+		WebSocketURL: strings.Replace(strings.Replace(suggestedURL, "https://", "wss://", 1), "http://", "ws://", 1) + "/ws/agent",
+	}
+
+	writeJSON(w, info)
+}
+
+func listLocalIPv4() []string {
+	var ips []string
+	ifaces, err := net.Interfaces()
+	if err != nil {
+		return ips
+	}
+	for _, iface := range ifaces {
+		if iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 {
+			continue
+		}
+		addrs, err := iface.Addrs()
+		if err != nil {
+			continue
+		}
+		for _, addr := range addrs {
+			var ip net.IP
+			switch v := addr.(type) {
+			case *net.IPNet:
+				ip = v.IP
+			case *net.IPAddr:
+				ip = v.IP
+			}
+			if ip == nil || ip.IsLoopback() {
+				continue
+			}
+			ip = ip.To4()
+			if ip == nil {
+				continue
+			}
+			ips = append(ips, ip.String())
+		}
+	}
+	return ips
+}
+
+func isLoopbackHost(host string) bool {
+	return host == "localhost" || host == "127.0.0.1" || host == "::1"
+}
+
+func parsePort(s string) int {
+	n := 0
+	for _, ch := range s {
+		if ch < '0' || ch > '9' {
+			return 8989
+		}
+		n = n*10 + int(ch-'0')
+	}
+	if n == 0 {
+		return 8989
+	}
+	return n
+}
+
+func itoa(n int) string {
+	if n == 0 {
+		return "0"
+	}
+	var buf [16]byte
+	i := len(buf)
+	for n > 0 {
+		i--
+		buf[i] = byte('0' + n%10)
+		n /= 10
+	}
+	return string(buf[i:])
+}