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ios - 从 firebase 可调用函数接收返回的数据

问题描述

我正在使用 iOS 中的 Callable HTTPS 函数。我创建并部署了以下功能：

export const generateLoginToken = functions.https.onCall((data, context) => {

    const uid = data.user_id
    if (!(typeof uid === 'string') || uid.length === 0) {
        throw new functions.https.HttpsError('invalid-argument', 'The function must be called with one argument "user_id" ');
    }

    admin.auth().createCustomToken(uid)
    .then((token) => {
        console.log("Did create custom token:", token)
        return { text: "some_data" };
    }).catch((error) => {
        console.log("Error creating custom token:", error)
        throw new functions.https.HttpsError('internal', 'createCustomToken(uid) has failed for some reason')
    })
})

然后我从我的 iOS 应用程序中调用该函数，如下所示：

let callParameters = ["user_id": userId]
    self?.functions.httpsCallable("generateLoginToken").call(callParameters) { [weak self] (result, error) in
    if let localError = self?.makeCallableFunctionError(error) {
        single(SingleEvent.error(localError))
    } else {
        print("Result", result)
        print("data", result?.data)
        if let text = (result?.data as? [String: Any])?["text"] as? String {
            single(SingleEvent.success(text))
        } else {
            let error = NSError.init(domain: "CallableFunctionError", code: 3, userInfo: ["info": "didn't find custom access token in the returned result"])
            single(SingleEvent.error(error))
        }
    }
}

我可以在日志中看到使用正确参数在服务器上调用了该函数，但我似乎无法获取从该函数返回到应用程序的数据。似乎该result.data值是nil出于某种原因，即使我return {text: "some_data"}来自云功能。怎么来的？

标签： iosswiftfirebasegoogle-cloud-functions

解决方案

哎呀！问题是我忘记从云函数返回实际的承诺。此功能有效：

export const generateLoginToken = functions.https.onCall((data, context) => {

    const uid = data.user_id
    if (!(typeof uid === 'string') || uid.length === 0) {
        throw new functions.https.HttpsError('invalid-argument', 'The function must be called with one argument "user_id" ');
    }

    return admin.auth().createCustomToken(uid)
    .then((token) => {
        console.log("Did create custom token:", token)
        return { text: "some_data" };
    }).catch((error) => {
        console.log("Error creating custom token:", error)
        throw new functions.https.HttpsError('internal', 'createCustomToken(uid) has failed for some reason')
    })
})

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