Serve static files in Go.

routers/filter.go

@@ -0,0 +1,43 @@
+// Copyright 2020 The casbin Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package routers
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/astaxie/beego/context"
+	"github.com/casdoor/casdoor/util"
+)
+
+func TransparentStatic(ctx *context.Context) {
+	urlPath := ctx.Request.URL.Path
+	if strings.HasPrefix(urlPath, "/api/") {
+		return
+	}
+
+	path := "web/build"
+	if urlPath == "/" {
+		path += "/index.html"
+	} else {
+		path += urlPath
+	}
+
+	if util.FileExist(path) {
+		http.ServeFile(ctx.ResponseWriter, ctx.Request, path)
+	} else {
+		http.ServeFile(ctx.ResponseWriter, ctx.Request, "web/build/index.html")
+	}
+}