在Unity中使用Firebase云功能时出现问题：请求数据总是为空

Question

我正在尝试运行 Unity 引擎的 Firebase Cloud Functions 官方快速入门示例。从unity调用函数时传递的参数数据（对象字典）始终为空。我尝试了不同的 Firebase SDK 版本，但问题始终存在。我不知道问题出在哪里，请帮忙。

这是Unity中的代码：

void Start()
{
        StartCoroutine(AddNumbers(7, 7));
}

protected IEnumerator AddNumbers(int firstNumber, int secondNumber) {
        var functions = FirebaseFunctions.GetInstance(FirebaseApp.DefaultInstance);
        var func = functions.GetHttpsCallableFromURL("https://getnumbers-dxhi3lnaew-uc.a.run.app");
        var data = new Dictionary<string, object>();
        data["firstNumber"] = firstNumber;
        data["secondNumber"] = secondNumber;
        var task = func.CallAsync(data).ContinueWithOnMainThread((callTask) => {
            if (callTask.IsFaulted) {
                // The function unexpectedly failed.
                Debug.Log("FAILED!");
                Debug.Log(String.Format("  Error: {0}", callTask.Exception));
                return;
            }

            // The function succeeded.
            var result = (IDictionary)callTask.Result.Data;
            Debug.Log(String.Format("AddNumbers: {0}", result["operationResult"]));
        });
        yield return new WaitUntil(() => task.IsCompleted);
}

云函数代码：

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

// Adds two numbers to each other.
exports.getNumbers = functions.https.onCall((data) => {
  // Numbers passed from the client.
  const firstNumber = data.firstNumber;
  const secondNumber = data.secondNumber;

  // Checking that attributes are present and are numbers.
  if (Number.isFinite(firstNumber) || !Number.isFinite(secondNumber)) {
    // Throwing an HttpsError so that the client gets the error details.
    throw new functions.https.HttpsError('invalid-argument', '!The function ' +
        'must be called with two arguments "firstNumber" and "secondNumber" ' +
        'which must both be numbers.');
  }

  // returning result.
  return {
    firstNumber: firstNumber,
    secondNumber: secondNumber,
    operator: '+',
    operationResult: firstNumber + secondNumber,
  };
});

Answer 1

云函数的参数实际上是整个

request

对象，您在 C# 代码中传递的数据位于其中的

data

属性中。

所以：

exports.getNumbers = functions.https.onCall((request) => {
  // Numbers passed from the client.
  const firstNumber = request.data.firstNumber;
  const secondNumber = request.data.secondNumber;
  ...

另请参阅有关 可调用函数 的 Firebase 文档，其中有示例说明了这一点。