如何使用 Azure Active Directory .NET SDK 删除 AppRoleAssignment？

我正在尝试找出如何删除AppRoleAssignment来自使用 Azure Active Directory 图形 API 的组或用户。我正在使用 .NET SDK（Microsoft.Azure.ActiveDirectory.GraphClient http://www.nuget.org/packages/Microsoft.Azure.ActiveDirectory.GraphClient).

我尝试过使用标准DeleteAsync每个上的方法IEntityBase，但它因错误而失败。它发出一个如下所示的 HTTP 请求：

DELETE /{tenantId}/directoryObjects/{appRoleAssignment ObjectID}/Microsoft.DirectoryServices.AppRoleAssignment?api-version=1.5

失败并出现 400 错误请求，并显示错误“不支持对此资源类型的直接查询”。

根据以下内容，这不是使用 Graph API 删除 AppRoleAssignments 的正确方法这篇微软博客文章 http://blogs.msdn.com/b/aadgraphteam/archive/2014/12/12/announcing-the-new-version-of-graph-api-api-version-1-5.aspx这表明您需要执行如下所示的 HTTP 请求：

DELETE /{tenantId}/users/{user object ID}/appRoleAssignments/{appRoleAs}?api-version=1.5

如果我使用该 URL 格式使用 HttpClient 执行手动 HTTP 请求，它可以工作，但我想知道如何在 .NET 库的范围内执行此操作，而不是自己执行手动 HTTP 请求。

如何通过 .NET 库删除 AppRoleAssignments？

虽然尚未修复，但您可以手动发出 HTTP 请求，但仍使用 Azure AD SDK 来获取令牌。像这样的事情：

var tenantId = "<guid> tenant id";
var appId = "<guid> your Azure app id";
var appKey = "your app key";
var authority = "i.e. https://login.windows.net/mycompany.onmicrosoft.com";
var graphUrl = "https://graph.windows.net/";

public async Task RemoveRoleFromUser(Guid userId, string roleObjectId) {
    var uri = string.Format("{0}/users/{1}/appRoleAssignments/{2}?api-version=1.5", tenantId, userId, roleObjectId);
    await ExecuteRequest<object>(uri, HttpMethod.Delete);
}

private async Task<T> ExecuteRequest<T>(string uri, HttpMethod method = null, Object body = null) where T : class {
    if (method == null) method = HttpMethod.Get;
    T response;
    var token = await AcquireTokenAsyncForApplication();
    using (var httpClient = new HttpClient { BaseAddress = getServicePointUri() }) {
        var request = new HttpRequestMessage(method, uri);
        request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", token);
        if (body != null) {
            request.Content = new StringContent(JsonConvert.SerializeObject(body), Encoding.UTF8, "application/json");
        }
        var responseMessage = await httpClient.SendAsync(request).ConfigureAwait(false);
        responseMessage.EnsureSuccessStatusCode();
        response = await responseMessage.Content.ReadAsAsync<T>();
    }
    return response;
}

private async Task<string> AcquireTokenAsyncForApplication() {
    ClientCredential clientCred = new ClientCredential(appId, appKey);
    var authenticationContext = new AuthenticationContext(authority, false);
    AuthenticationResult authenticationResult = authenticationContext.AcquireToken(graphUrl, clientCred);
    return authenticationResult.AccessToken;
}

private Uri getServicePointUri() {
    Uri servicePointUri = new Uri(graphUrl);
    Uri serviceRoot = new Uri(servicePointUri, tenantId);
    return serviceRoot;
}