Can't get client-credentials access token to authorize Power BI

Question

I'm trying to use the Power BI REST API, using an access token acquired with the "client credentials" method, but I keep getting 403 Forbidden on my requests.

My code follows the pattern demonstrated in this AzureAD sample. In fact, to isolate this problem, I'm running that sample code (with my own values in the parameters.json, of course):

{ 
  expiresIn: 3599,
  tokenType: 'Bearer',
  expiresOn: Tue Sep 01 2015 16:56:07 GMT-0500 (CDT),
  resource: '00000002-0000-0000-c000-000000000000',
  accessToken: 'eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsIng1dCI6Ik1uQ19WWmNBVGZNNXBPWWlKSE1iYTlnb0VLWSIsImtpZCI6Ik1uQ19WWmNBVGZNNXBPWWlKSE1iYTlnb0VLWSJ9.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.YTGJfdW1wP09bDHwwsv3FPAmEpmQdc_kifvgY-1KjhkZWANfYtd050wfeZdNgMUeSPZyFdWnoBjnJ4xrlDtnsADwV1Grr6TXYcymPLofbY-xy0cjyvzxTmM11DJ9XN8A4tkgvK0jtR-YyIjPw5EKJSKyeEbD9U3mWsE_gu7IzKzXl8e-dfVAqRYS6WHZy6_0FaNmppPDls5s_QIPOHofFSiWVISw41Mz0fQnP2QEGyceOCvKYJtrUOCDwfVuwFS-gSLmYvEGOJfmIjftP3srda0JPirVzBeU0IFJJ1KW81kE5cfKw1KkBB04VVetRUs_7HqloYaKKiTybauhXAodRQ',
  isMRRT: true,
  _clientId: '[snip]',
  _authority: 'https://login.windows.net/[snip]' 
}

When I use that access token in a curl request, as follows, I get a 403:

curl -vv -X GET https://api.powerbi.com/v1.0/myorg/datasets -H"Authorization: Bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsIng1dCI6Ik1uQ19WWmNBVGZNNXBPWWlKSE1iYTlnb0VLWSIsImtpZCI6Ik1uQ19WWmNBVGZNNXBPWWlKSE1iYTlnb0VLWSJ9.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.YTGJfdW1wP09bDHwwsv3FPAmEpmQdc_kifvgY-1KjhkZWANfYtd050wfeZdNgMUeSPZyFdWnoBjnJ4xrlDtnsADwV1Grr6TXYcymPLofbY-xy0cjyvzxTmM11DJ9XN8A4tkgvK0jtR-YyIjPw5EKJSKyeEbD9U3mWsE_gu7IzKzXl8e-dfVAqRYS6WHZy6_0FaNmppPDls5s_QIPOHofFSiWVISw41Mz0fQnP2QEGyceOCvKYJtrUOCDwfVuwFS-gSLmYvEGOJfmIjftP3srda0JPirVzBeU0IFJJ1KW81kE5cfKw1KkBB04VVetRUs_7HqloYaKKiTybauhXAodRQ"

Wondering if that curl request was flawed somehow, I snooped out an access token “the wrong way” via browser webtools, and the above works fine, returning a 200 and a JSON response listing my datasets.

I did also notice that the return code is 403 (forbidden), not 401 (unauthorized), so I wondered if the authorization was okay but the permissions on the Power BI side were wrong. But I also get 403 when I use any garbage text for the access token (e.g., Authorization: Bearer foo), so I discarded that theory.

So. I think I have a valid test, and I’m getting what I think is a valid access token (from that client-credentials-sample.js code), but it’s still not working. What am I missing?

Answer 1

在一些微软人员的帮助下（感谢Jon Gallant和Josh Caplan ），我已经了解到使用OAuth客户端凭据流进行身份验证，就像我在使用JavaScript示例，提供的访问权限不足。要使用Power BI，身份验证需要基于特定用户。

我尝试使用：

1. 类似的JavaScript示例username-password-sample.js
2. resource值https://analysis.windows.net/powerbi/api（ thanks，slugslog ）
3. 将username和password添加到parameters.json

这让我更接近，但我仍然得到400响应："error_description":"AADSTS90014: The request body must contain the following parameter: 'client_secret or client_assertion'. …"。

对adal-node库的攻击（硬编码客户端密码，即line 217 of token-request.js之后的oauthParameters[OAuth2Parameters.CLIENT_SECRET] = "my-client-secret";）足以取回在Authorization中工作的访问令牌原始curl电话的标头。

当然，硬编码这个价值并不是我的最终解决方案。无论如何，我不打算使用adal-node库。但就这个认证案例的概念验证而言，这就是我的答案。

Answer 2

确保您在AAD注册的应用具有读写所有数据集权限。这应该可以解决问题。

Answer 3

这不是答案，而是在调试过程中向前迈出了一步。我认为请求令牌的资源应该是＆＃34; https://analysis.windows.net/powerbi/api＆＃34;。我在多篇参考文献中看到了这些内容;其中一个链接如下。即使更改了这个，我仍然得到403.正如OP提到的，如果我们使用powerBI门户网站的accessToken，一切正常。

Answer 4

所以我用我自己的应用尝试了这个，以下命令（对我来说）有效：

curl -vv -X GET https://api.powerbi.com/v1.0/myorg/datasets -H"Authorization: Bearer ey....qqqq"

顺便说一下，-v之后的额外“v”似乎是多余的。

所以我可以得出结论，你的应用程序缺少调用Power BI API所需的权限。

您可能尝试的一件事是抓取我们的一个示例，在AAD中为它创建一个新的应用程序，然后查看授权令牌是否适用于它。这是一个很好的尝试：https://github.com/PowerBI/Integrate-a-tile-into-an-app