从 Google 中的客户端电子邮件和私钥（服务帐户）获取令牌

Question

我花了很多时间试图获取身份验证令牌。

我需要向我的用户展示一些收集到的 Analytics 信息（我是 Analytics 的所有者）。我已经创建了一个服务帐户，并且我已经使用这个示例测试了所有内容，并且一切正常（当然是使用 Nuget 包）。

示例：链接

代码示例工作：

string[] scopes = new string[] {AnalyticsService.Scope.Analytics}; // view and manage your Google Analytics data

var keyFilePath = @"c:\file.p12" ;    // Downloaded from https://console.developers.google.com
var serviceAccountEmail = "xx@developer.gserviceaccount.com";  // found https://console.developers.google.com

//loading the Key file
var certificate = new X509Certificate2(keyFilePath, "notasecret", X509KeyStorageFlags.Exportable);
var credential = new ServiceAccountCredential( new ServiceAccountCredential.Initializer(serviceAccountEmail) {
                                                   Scopes = scopes}.FromCertificate(certificate));

我使用过 Fiddler，我可以看到令牌是如何在 Google 和我的应用程序之间“飞行”的，但我没有任何选择。

我需要在 Python 上执行类似此代码的操作，但在 C# 中使用Embed API

# service-account.py

import json
from oauth2client.client import SignedJwtAssertionCredentials

# The scope for the OAuth2 request.
SCOPE = 'https://www.googleapis.com/auth/analytics.readonly'

# The location of the key file with the key data.
KEY_FILEPATH = 'path/to/json-key.json'

# Load the key file's private data.
with open(KEY_FILEPATH) as key_file:
  _key_data = json.load(key_file)

# Construct a credentials objects from the key data and OAuth2 scope.
_credentials = SignedJwtAssertionCredentials(
    _key_data['client_email'], _key_data['private_key'], SCOPE)

# Defines a method to get an access token from the credentials object.
# The access token is automatically refreshed if it has expired.
def get_access_token():
  return _credentials.get_access_token().access_token

如果您阅读有关 Embed Api 的文档，您会发现您需要令牌...

 /**
   * Authorize the user with an access token obtained server side.
   */
  gapi.analytics.auth.authorize({
    'serverAuth': {
      'access_token': '{{ ACCESS_TOKEN_FROM_SERVICE_ACCOUNT }}'
    }
  });

有了所有这些信息......我怎样才能获得服务令牌？？？谢谢！！

Answer 1

这对我有用

代码：

   public string bearer;
   GoogleCredential credential;

        string fichero = Server.MapPath("") + "//file.json";
        using (Stream stream = new FileStream(fichero, FileMode.Open,   FileAccess.Read, FileShare.Read))
        {
            credential = GoogleCredential.FromStream(stream);
        }
        credential = credential.CreateScoped(new[] { 
       "https://www.googleapis.com/auth/analytics.readonly" });


        try
        {
            Task<string> task = ((ITokenAccess)credential).GetAccessTokenForRequestAsync();
            task.Wait();
            bearer = task.Result;

        }
        catch (AggregateException ex)
        {
            throw ex.InnerException;
        }

Javascript代码：

gapi.analytics.auth.authorize({
    'serverAuth': {
        'access_token': '<%=bearer%>'
    }
});