Firebase身份验证有效，但使用Google Text to Speech API时出现错误 [英] Firebase authentification works but I get error when using the Google Text to Speech API

问题描述

我已经建立了一个小型的android和firebase应用程序...身份验证就像一个超级按钮，在firebase控制台中，我可以看到使用Google帐户登录的用户.

I've set up a small android and firebase app... Authentification works like a charm, and in the firebase console, I can see my user, logged in with the Google account.

现在，我正在尝试使用文字转语音" api进行一些实验，并按照此教程进行操作:

Now I am trying to experiment a little with the Text to Speech api, and in doing so, I followed this tutorial:

https://github.com/GoogleCloudPlatform /java-docs-samples/tree/master/texttospeech/cloud-client

通过设置GOOGLE_APPLICATION_CREDENTIALS环境变量，我设法使小型Java应用程序正常工作(我按照本教程的步骤进行操作:

I managed to make the small java app work, by setting the GOOGLE_APPLICATION_CREDENTIALS Environment variable (I followed this tutorial for this step: https://cloud.google.com/docs/authentication/getting-started), but I am not sure what I need to do to make that code work in the Android app where the users are authentificated..

尝试调用TextToSpeech API时遇到的错误是:

The Error that I get when trying to make a call to the TextToSpeech API is:

应用程序默认凭据不可用.他们是 如果在Google Compute Engine中运行，则可用.否则， 必须定义环境变量GOOGLE_APPLICATION_CREDENTIALS 指向定义凭据的文件.看 https://developers.google.com/accounts/docs/application-default-凭据 有关更多信息.

The Application Default Credentials are not available. They are available if running in Google Compute Engine. Otherwise, the environment variable GOOGLE_APPLICATION_CREDENTIALS must be defined pointing to a file defining the credentials. See https://developers.google.com/accounts/docs/application-default-credentials for more information.

提到的错误来自以下行:

The error mentioned comes from the line:

TextToSpeechClient textToSpeechClient = TextToSpeechClient.create();

出现此错误的原因是，在android模拟器上，我无权访问在操作系统中设置为环境变量的凭据.因此，我必须以另一种方式提供凭据.

This error appears because of the fact that on the android emulator I don't have access to the credentials that are set as environment variable in my OS..So I have to provide the credentials in another way.

对于其他Google API(例如存储)，我发现可以这样做:

In the case of other Google APIs, like Storage, I found out that this can be done like this:

// You can specify a credential file by providing a path to GoogleCredentials.
// Otherwise credentials are read from the GOOGLE_APPLICATION_CREDENTIALS environment variable.
GoogleCredentials credentials = GoogleCredentials.fromStream(new FileInputStream(jsonPath))
 .createScoped(Lists.newArrayList("https://www.googleapis.com/auth/cloud-platform"));
Storage storage = StorageOptions.newBuilder().setCredentials(credentials).build().getService();

我设法用json文件的内容创建了GoogleCredentials对象，但是TextToSpeech客户端似乎没有提供类似于以下功能:

I managed to create the GoogleCredentials object with the contents of the json file, however the TextToSpeech client doesn't seem to provide a functionality similar to this:

StorageOptions.newBuilder().setCredentials(credentials).build()

所以我的问题是....是否可以将凭据对象提供给TextToSpeech客户端?

So my question is....is there a way to provide the Credentials object to the TextToSpeech client?

谢谢

推荐答案

当前，没有一种方法可以从

Currently, there is not a way to provide credentials to the TTS Client from this page.

出于安全性/身份验证的原因，我认为建议的最佳方法是使用 Firebase函数.

Due to Security / Auth reasons, I believe the best suggested approach is to use Firebase Functions.

1. 获取文字
2. 调用Firebase函数
3. 具有Firebase函数调用TTS API
4. 返回结果.

这样，应用程序内部不会泄漏任何密钥，您可以使用Firebase Auth.

This way, no keys are leaked inside the application and you can use Firebase Auth.

让我知道是否有帮助！

更新:

选项2: iOS教程(应适用于Android )

Option 2: iOS Tutorial (should be adaptable to Android)

1. 获取文字
2. 调用Firebase函数
3. 具有Firebase函数返回OAuth2令牌
4. 直接通过API使用令牌

这篇关于Firebase身份验证有效，但使用Google Text to Speech API时出现错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！