如何从Cloud Function返回'Instance of Document Reference‘到Flutter？

const admin = require('firebase-admin');
admin.initializeApp();

// 获取Firestore实例
const firestore = admin.firestore();

exports.getDocumentReference = functions.https.onRequest((req, res) => {
  // 执行Firestore操作
  const docRef = firestore.collection('your_collection').doc('your_document');

  // 构建响应
  const response = {
    documentReference: docRef,
  };

  // 返回JSON响应
  res.json(response);
});

dependencies:
  http: ^0.13.3

import 'package:http/http.dart' as http;

Future<void> getDocumentReference() async {
  final response = await http.get(Uri.parse('YOUR_CLOUD_FUNCTION_URL'));

  if (response.statusCode == 200) {
    final data = jsonDecode(response.body);
    final documentReference = data['documentReference'];

    // 在这里处理Document Reference
  } else {
    // 处理错误情况
  }
}