feat: serve swagger ui

fix: forbid to browse file system index

middlewares/filetype.go

@@ -0,0 +1,32 @@
+package middlewares
+
+import (
+	"net/http"
+	"strings"
+)
+
+type SuffixFilterMiddleware struct {
+	handler     http.Handler
+	filterTypes []string
+}
+
+func NewFileTypeFilterMiddleware(filter []string) func(http.Handler) http.Handler {
+	return func(h http.Handler) http.Handler {
+		return &SuffixFilterMiddleware{
+			handler:     h,
+			filterTypes: filter,
+		}
+	}
+}
+
+func (f *SuffixFilterMiddleware) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	path := strings.ToLower(r.URL.Path)
+	for _, t := range f.filterTypes {
+		if strings.HasSuffix(path, strings.ToLower(t)) {
+			w.WriteHeader(http.StatusForbidden)
+			w.Write([]byte("403 forbidden"))
+			return
+		}
+	}
+	f.handler.ServeHTTP(w, r)
+}