优化结构

internal/utils/routepath/routepath.go

@@ -0,0 +1,19 @@
+package routepath
+
+import "strings"
+
+// Normalize removes only a complete configured router prefix. Paths
+// such as /administrator must not be shortened when the prefix is /admin.
+func Normalize(path, routerPrefix string) string {
+	prefix := strings.TrimSuffix(strings.TrimSpace(routerPrefix), "/")
+	if prefix == "" || prefix == "/" {
+		return path
+	}
+	if path == prefix {
+		return "/"
+	}
+	if strings.HasPrefix(path, prefix+"/") {
+		return strings.TrimPrefix(path, prefix)
+	}
+	return path
+}

internal/utils/routepath/routepath_test.go

@@ -0,0 +1,26 @@
+package routepath
+
+import "testing"
+
+func TestNormalize(t *testing.T) {
+	tests := []struct {
+		name   string
+		path   string
+		prefix string
+		want   string
+	}{
+		{name: "empty prefix", path: "/api/login", prefix: "", want: "/api/login"},
+		{name: "configured prefix", path: "/admin/api/login", prefix: "/admin", want: "/api/login"},
+		{name: "trailing slash prefix", path: "/admin/api/login", prefix: "/admin/", want: "/api/login"},
+		{name: "prefix root", path: "/admin", prefix: "/admin", want: "/"},
+		{name: "prefix boundary", path: "/administrator/api/login", prefix: "/admin", want: "/administrator/api/login"},
+		{name: "already normalized", path: "/api/login", prefix: "/admin", want: "/api/login"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := Normalize(tt.path, tt.prefix); got != tt.want {
+				t.Fatalf("Normalize(%q, %q) = %q, want %q", tt.path, tt.prefix, got, tt.want)
+			}
+		})
+	}
+}