feat: 基础框架搭建完毕

internal/adminui/handler.go

@@ -0,0 +1,55 @@
+// Package adminui serves the compiled management console from the API binary.
+package adminui
+
+import (
+	"embed"
+	"io/fs"
+	"net/http"
+	"path"
+	"strings"
+)
+
+//go:embed all:dist
+var assets embed.FS
+
+func Handler() http.Handler {
+	root, _ := fs.Sub(assets, "dist")
+	files := http.FileServer(http.FS(root))
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodGet && r.Method != http.MethodHead {
+			w.Header().Set("Allow", "GET, HEAD")
+			http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+			return
+		}
+		name := strings.TrimPrefix(path.Clean("/"+r.URL.Path), "/")
+		if strings.HasPrefix(name, ".") || strings.Contains(name, "/.") {
+			http.NotFound(w, r)
+			return
+		}
+		if _, err := fs.Stat(root, "index.html"); err != nil {
+			http.Error(w, "Management console not built. Run make admin-build, then rebuild the API.", http.StatusServiceUnavailable)
+			return
+		}
+		if name != "" && name != "." {
+			if info, err := fs.Stat(root, name); err == nil && !info.IsDir() {
+				files.ServeHTTP(w, r)
+				return
+			}
+		}
+		if path.Ext(name) != "" || strings.HasPrefix(name, "assets/") {
+			http.NotFound(w, r)
+			return
+		}
+		index, err := fs.ReadFile(root, "index.html")
+		if err != nil {
+			http.Error(w, "Management console unavailable", http.StatusServiceUnavailable)
+			return
+		}
+		w.Header().Set("Content-Type", "text/html; charset=utf-8")
+		w.Header().Set("Cache-Control", "no-cache")
+		w.WriteHeader(http.StatusOK)
+		if r.Method != http.MethodHead {
+			_, _ = w.Write(index)
+		}
+	})
+}