Feature: add basic api for proxy provider

hub/route/provider.go

@@ -0,0 +1,66 @@
+package route
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/Dreamacro/clash/adapters/provider"
+	T "github.com/Dreamacro/clash/tunnel"
+
+	"github.com/go-chi/chi"
+	"github.com/go-chi/render"
+)
+
+func proxyProviderRouter() http.Handler {
+	r := chi.NewRouter()
+	r.Get("/", getProviders)
+
+	r.Route("/{name}", func(r chi.Router) {
+		r.Use(parseProviderName, findProviderByName)
+		r.Get("/", getProvider)
+		r.Get("/healthcheck", doProviderHealthCheck)
+	})
+	return r
+}
+
+func getProviders(w http.ResponseWriter, r *http.Request) {
+	providers := T.Instance().Providers()
+	render.JSON(w, r, render.M{
+		"providers": providers,
+	})
+}
+
+func getProvider(w http.ResponseWriter, r *http.Request) {
+	provider := r.Context().Value(CtxKeyProvider).(provider.ProxyProvider)
+	render.JSON(w, r, provider)
+}
+
+func doProviderHealthCheck(w http.ResponseWriter, r *http.Request) {
+	provider := r.Context().Value(CtxKeyProvider).(provider.ProxyProvider)
+	provider.HealthCheck()
+	render.NoContent(w, r)
+}
+
+func parseProviderName(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		name := getEscapeParam(r, "name")
+		ctx := context.WithValue(r.Context(), CtxKeyProviderName, name)
+		next.ServeHTTP(w, r.WithContext(ctx))
+	})
+}
+
+func findProviderByName(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		name := r.Context().Value(CtxKeyProviderName).(string)
+		providers := T.Instance().Providers()
+		provider, exist := providers[name]
+		if !exist {
+			render.Status(r, http.StatusNotFound)
+			render.JSON(w, r, ErrNotFound)
+			return
+		}
+
+		ctx := context.WithValue(r.Context(), CtxKeyProvider, provider)
+		next.ServeHTTP(w, r.WithContext(ctx))
+	})
+}