Typescript 如何从Firebase云函数中调用Google Places API？

我正试图在我的Flitter应用程序中，借助GooglePlacesAPI及其自动完成功能实现一个位置自动完成功能。为了使API调用逻辑和API密钥远离客户端，Flatter应用程序应该调用Firebase云函数，然后Firebase云函数调用Google Places API。几天来，我一直在努力让它发挥作用，阅读了各种各样的文章，但我无法取得任何进展。这是我的Firebase云函数的源代码：

import * as functions from "firebase-functions";
import * as axios from "axios";

export const autofillSuggestions = functions.region("europe-west3")
    .https.onCall(async (data) => {
      const input = data.input;
      const sessionToken = data.sessiontoken;

      // will be stored as an environment variable, as soon as i get cloud function to work
      const googleAPIKey = "my_api_key"; 
      

      const requestURL = "https://maps.googleapis.com/maps/api/place/autocomplete/json?input=" + input +
     "&key=" + googleAPIKey + "&sessiontoken=" + sessionToken;

      return await axios.default.get(requestURL).then((apiResponse) => {
        return {predictions: apiResponse.data.predictions,
        };
      })
          .catch((error) => {
            console.log(error);
          });
    });

此源代码被导入到

index.ts

中，然后再次导出该文件，因此问题不应存在于此。 Flatter应用程序中的云函数调用逻辑如下所示：

HttpsCallable _getCallable(String functionName) =>
      FirebaseFunctions.instance.httpsCallable(functionName);

 Future<dynamic> _getSuggestionsFromGoogleMapsAPI(String input) async {
    //FirebaseFunctions.instance
    //    .useFunctionsEmulator(origin: 'http://localhost:5001');
    final callable = _getCallable('autofillSuggestions');

    try {

      final data = HashMap.of({
        'sugg': input,
        'sessionToken': _sessionToken,
      });
      final response = await callable.call(data);
      return response.data;
    } catch (e) {
      print(e);
      throw AutocompletionFailure();
    }
  }

autofillSuggestions
{
 "@type":"type.googleapis.com/google.cloud.audit.AuditLog",
 "authenticationInfo":{"principalEmail":"my@mail.com"},
 "requestMetadata": 
   {
     "callerIp":"10.10.101.101",
     "callerSuppliedUserAgent":"FirebaseCLI/9.8.0,gzip(gfe),gzip(gfe)",
     "requestAttributes":{"time":"2021-04-04T09:34:15.120516Z","auth":{}},
     "destinationAttributes":{}
   },
 "serviceName":"cloudfunctions.googleapis.com",
 "methodName":"google.cloud.functions.v1.CloudFunctionsService.SetIamPolicy",
 "authorizationInfo":
   [
    {
     "resource":"projects/my-project/locations/europe-west3/functions/autofillSuggestions",
     "permission":"cloudfunctions.functions.setIamPolicy",
     "granted":true,
     "resourceAttributes":{}
    },
    {
     "permission":"cloudfunctions.functions.setIamPolicy",
     "granted":true,
     "resourceAttributes":{}
    }
   ],
 "resourceName":"projects/my-project/locations/europe-west3/functions/autofillSuggestions",
 "request":
   {
    "updateMask":"version,bindings",
    "resource":"projects/my-project/locations/europe-west3/functions/autofillSuggestions",
    "policy":
      {
       "bindings":
         [
          {
           "members":["allUsers"],
           "role":"roles/cloudfunctions.invoker"
          }
         ]
      },
    "@type":"type.googleapis.com/google.iam.v1.SetIamPolicyRequest"
   },
 "response":
   {
    "bindings":
        [
         {
          "members":["allUsers"],
          "role":"roles/cloudfunctions.invoker"
         }
        ],
    "@type":"type.googleapis.com/google.iam.v1.Policy","etag":"BwW/IkjRmog="
   },
 "resourceLocation":{"currentLocations":["europe-west3"]}
}

因为它没有提到类似于

函数执行已开始

或

函数执行已终止的任何内容我怀疑云函数根本没有被调用。。。我的想法对吗？如果是，有人知道如何让它工作吗

我把自己的注意力集中在和上。我也发现很有趣，但还没有尝试过，因为我认为我的主要问题是云函数甚至没有被调用

非常感谢您的帮助！大家复活节快乐
 答案是——当然——相当愚蠢，但我想这是它的诅咒和自动欺骗。。。
如您所见，由于我的位置，我指定了
europe-west3
作为我的云功能区域。但是在获取
callable
引用时，我没有指定区域，这导致
cloud\u functions
flatter包创建一个
FirebaseFunctions
实例，默认区域设置为
us-central1
。这打乱了通话，导致内部错误。Fatter应用程序中提供了简易修复：

\u getCallable
的新实现：

HttpsCallable _getCallable(String functionName) {
   return FirebaseFunctions.instanceFor(region: 'europe-west3')
       .httpsCallable(functionName);
}

就这样！现在我可以享受我的复活节午餐了！节日快乐