Add basic clash api

experimental/clashapi/configs.go

@@ -0,0 +1,49 @@
+package clashapi
+
+import (
+	"net/http"
+
+	"github.com/sagernet/sing-box/log"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/render"
+)
+
+func configRouter(logFactory log.Factory) http.Handler {
+	r := chi.NewRouter()
+	r.Get("/", getConfigs(logFactory))
+	r.Put("/", updateConfigs)
+	r.Patch("/", patchConfigs)
+	return r
+}
+
+type configSchema struct {
+	Port        *int    `json:"port"`
+	SocksPort   *int    `json:"socks-port"`
+	RedirPort   *int    `json:"redir-port"`
+	TProxyPort  *int    `json:"tproxy-port"`
+	MixedPort   *int    `json:"mixed-port"`
+	AllowLan    *bool   `json:"allow-lan"`
+	BindAddress *string `json:"bind-address"`
+	Mode        string  `json:"mode"`
+	LogLevel    string  `json:"log-level"`
+	IPv6        *bool   `json:"ipv6"`
+	Tun         any     `json:"tun"`
+}
+
+func getConfigs(logFactory log.Factory) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		render.JSON(w, r, &configSchema{
+			Mode:     "Rule",
+			LogLevel: log.FormatLevel(logFactory.Level()),
+		})
+	}
+}
+
+func patchConfigs(w http.ResponseWriter, r *http.Request) {
+	render.NoContent(w, r)
+}
+
+func updateConfigs(w http.ResponseWriter, r *http.Request) {
+	render.NoContent(w, r)
+}