javascript - 如何从 firebase 中的函数检索数据

Question

我可以看到该功能现在正在云功能日志中运行，它根据用户的电子邮件发回用户信息，但是，我似乎无法在应用程序客户端中检索回该数据，它只是通过作为Optional(<FIRHTTPSCallableResult: 0x2825b0b70>)

这是我的函数代码:

import * as functions from 'firebase-functions'
import * as admin from 'firebase-admin'
admin.initializeApp()

exports.uniqueEmail = functions.https.onCall((data) => {
  const email = data.email;
  if (!email) {
    throw new functions.https.HttpsError('invalid-argument', 'Missing email parameter');
  }
  admin.auth().getUserByEmail(email)
  .then(function(userRecord) {
    // See the UserRecord reference doc for the contents of userRecord.
    console.log('Successfully fetched user data:', userRecord.toJSON());
    return "true"
  })
  .catch(function(error) {
   console.log('Error fetching user data:', error);
   return "false"
  });
});

这是我的 swift 代码，试图将我应该取回的数据打印到控制台:

else if (email != "" && password == ""){
    print("testing...")
    let functions = Functions.functions()
    functions.httpsCallable("uniqueEmail").call(["email": email]) { (result, error) in
        if let error = error as NSError? {
            if error.domain == FunctionsErrorDomain {
                let code = FunctionsErrorCode(rawValue: error.code)
                let message = error.localizedDescription
                let details = error.userInfo[FunctionsErrorDetailsKey]
                print("CODE:", code, " ","Message:", message, " ","DETAILS:", details)
            }
            // ...
        }
        print(result)
        if let text = (result?.data as? [String: Any])?["email"] as? String {
            let output = text
            print(output)
        }
    }
}

Answer 1

现在您的 Cloud Functions 代码的顶层没有返回任何内容，因此您需要通过在顶层添加 return 来解决此问题:

exports.uniqueEmail = functions.https.onCall((data) => {
  const email = data.email;
  if (!email) {
    throw new functions.https.HttpsError('invalid-argument', 'Missing email parameter');
  }
  return admin.auth().getUserByEmail(email).then(function(userRecord) {
    console.log('Successfully fetched user data:', userRecord.toJSON());
    return {"taken" : "true"}
  }).catch(function(error) {
   console.log('Error fetching user data:', error);
   return({"taken": "false", error});
  });
});

通过上面的代码，调用 Cloud Function 的代码会返回一个 JSON 对象，在 Swift 中将其转换为字典:[String, Any]。