From df83602e1718907ed97895d03d08d6751f639595 Mon Sep 17 00:00:00 2001
From: Yang Luo <hsluoyz@qq.com>
Date: Tue, 20 Oct 2020 23:24:07 +0800
Subject: [PATCH] Serve static files in Go.

---
 main.go           |  7 +++++++
 routers/filter.go | 43 +++++++++++++++++++++++++++++++++++++++++++
 util/path.go      | 24 ++++++++++++++++++++++++
 3 files changed, 74 insertions(+)
 create mode 100644 routers/filter.go
 create mode 100644 util/path.go

diff --git a/main.go b/main.go
index 228094f4..d05e0919 100644
--- a/main.go
+++ b/main.go
@@ -18,6 +18,7 @@ import (
 	"github.com/astaxie/beego"
 	"github.com/astaxie/beego/plugins/cors"
 	"github.com/casdoor/casdoor/object"
+	"github.com/casdoor/casdoor/routers"
 
 	_ "github.com/casdoor/casdoor/routers"
 )
@@ -33,6 +34,12 @@ func main() {
 		AllowCredentials: true,
 	}))
 
+	//beego.DelStaticPath("/static")
+	beego.SetStaticPath("/static", "web/build/static")
+	// https://studygolang.com/articles/2303
+	beego.InsertFilter("/", beego.BeforeRouter, routers.TransparentStatic) // must has this for default page
+	beego.InsertFilter("/*", beego.BeforeRouter, routers.TransparentStatic)
+
 	beego.BConfig.WebConfig.Session.SessionProvider="file"
 	beego.BConfig.WebConfig.Session.SessionProviderConfig = "./tmp"
 	beego.BConfig.WebConfig.Session.SessionGCMaxLifetime = 3600 * 24 * 365
diff --git a/routers/filter.go b/routers/filter.go
new file mode 100644
index 00000000..56afb3c7
--- /dev/null
+++ b/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")
+	}
+}
diff --git a/util/path.go b/util/path.go
new file mode 100644
index 00000000..91b01083
--- /dev/null
+++ b/util/path.go
@@ -0,0 +1,24 @@
+// 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 util
+
+import "os"
+
+func FileExist(path string) bool {
+	if _, err := os.Stat(path); os.IsNotExist(err) {
+		return false
+	}
+	return true
+}