feat: can modify static resource url by app.conf (#1045)

* feat: can modify static resource url by app.conf

Signed-off-by: magicwind <2814461814@qq.com>

* Update static_filter.go

Signed-off-by: magicwind <2814461814@qq.com>
Co-authored-by: Yang Luo <hsluoyz@qq.com>

main.go

@@ -45,7 +45,8 @@ func main() {
 	util.SafeGoroutine(func() { object.RunSyncUsersJob() })
 
 	// beego.DelStaticPath("/static")
-	beego.SetStaticPath("/static", "web/build/static")
+	// beego.SetStaticPath("/static", "web/build/static")
+
 	beego.BConfig.WebConfig.DirectoryIndex = true
 	beego.SetStaticPath("/swagger", "swagger")
 	beego.SetStaticPath("/files", "files")

routers/static_filter.go

@@ -16,12 +16,19 @@ package routers
 
 import (
 	"net/http"
+	"os"
 	"strings"
 
+	"github.com/astaxie/beego"
 	"github.com/astaxie/beego/context"
 	"github.com/casdoor/casdoor/util"
 )
 
+var (
+	oldStaticBaseUrl = "https://cdn.casbin.org"
+	newStaticBaseUrl = beego.AppConfig.String("staticBaseUrl")
+)
+
 func StaticFilter(ctx *context.Context) {
 	urlPath := ctx.Request.URL.Path
 	if strings.HasPrefix(urlPath, "/api/") || strings.HasPrefix(urlPath, "/.well-known/") {
@@ -38,9 +45,35 @@ func StaticFilter(ctx *context.Context) {
 		path += urlPath
 	}
 
-	if util.FileExist(path) {
+	if !util.FileExist(path) {
+		path = "web/build/index.html"
+	}
+
+	if oldStaticBaseUrl == newStaticBaseUrl {
 		http.ServeFile(ctx.ResponseWriter, ctx.Request, path)
 	} else {
-		http.ServeFile(ctx.ResponseWriter, ctx.Request, "web/build/index.html")
+		serveFileWithReplace(ctx.ResponseWriter, ctx.Request, path, oldStaticBaseUrl, newStaticBaseUrl)
+	}
+}
+
+func serveFileWithReplace(w http.ResponseWriter, r *http.Request, name string, old string, new string) {
+	f, err := os.Open(name)
+	if err != nil {
+		panic(err)
+	}
+	defer f.Close()
+
+	d, err := f.Stat()
+	if err != nil {
+		panic(err)
+	}
+
+	oldContent := util.ReadStringFromPath(name)
+	newContent := strings.ReplaceAll(oldContent, old, new)
+
+	http.ServeContent(w, r, d.Name(), d.ModTime(), strings.NewReader(newContent))
+	_, err = w.Write([]byte(newContent))
+	if err != nil {
+		panic(err)
 	}
 }

web/public/index.html

@@ -19,7 +19,7 @@
       name="description"
       content="Casdoor - An Identity and Access Management (IAM) / Single-Sign-On (SSO) platform with web UI supporting OAuth 2.0, OIDC, SAML and CAS"
     />
-    <link rel="apple-touch-icon" href="https://cdn.casdoor.com/static/favicon.png" />
+    <link rel="apple-touch-icon" href="https://cdn.casbin.org/img/favicon.png" />
     <!--
       manifest.json provides metadata used when your web app is installed on a
       user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/

web/src/index.css

@@ -13,7 +13,7 @@ code {
 }
 
 .logo {
-  background: url("https://cdn.casdoor.com/logo/casdoor-logo_1185x256.png");
+  background: url("https://cdn.casbin.org/img/casdoor-logo_1185x256.png");
   background-size: 130px, 27px;
   width: 130px;
   height: 27px;