无法验证来自 .NET Core 的 SharePoint REST 或 CSOM 调用

Question

我在使用 CSOM 和 REST 服务从 .NET Core 控制台应用程序访问 SharePoint 时遇到问题。

首先，我创建了一个面向 .NET Framework 4.6.1 的控制台应用程序，安装了 Microsoft.SharePointOnline.CSOM nuget 包，并添加了两个示例方法以使用硬编码的用户凭据连接到 SharePoint。这行得通。

public static void CsomCall()
{
    var password = "password";
    var securePassword = new SecureString();
    foreach (var c in password.ToCharArray()) securePassword.AppendChar(c);

    using (ClientContext context = new ClientContext("https://siteurl"))
    {
        context.Credentials = new SharePointOnlineCredentials("user@domain", securePassword);
        Web web = context.Web;
        context.Load(web);
        context.ExecuteQuery();
        Console.WriteLine(web.Title);
    }
}
private static void RestCall()
{
    var password = "password";
    var securePassword = new SecureString();
    foreach (var c in password.ToCharArray()) securePassword.AppendChar(c);

    var credentials = new SharePointOnlineCredentials("user@domain", securePassword);

    using (WebClient client = new WebClient())
    {
        client.Headers.Add("X-FORMS_BASED_AUTH_ACCEPTED", "f");
        client.Credentials = credentials;
        client.Headers.Add(HttpRequestHeader.ContentType, "application/json;odata=verbose");
        client.Headers.Add(HttpRequestHeader.Accept, "application/json;odata=verbose");
        var content = client.DownloadString("https://siteurl/_api/web/lists");
        Console.WriteLine(content);
    }
}

然后我创建了一个 .NET Core 控制台应用程序并复制了上面的方法。我了解 .NET Core 尚不支持 SharePoint CSOM，因此我使用了建议的解决方法 here 并手动引用了 Microsoft.SharePoint.Client.Portable.dll、Microsoft.SharePoint.Client.Runtime.Portable.dll 和 Microsoft.SharePoint.Client.Runtime.Windows.dll.

我必须进行一些更改才能编译代码：

.ExecuteQueryAsync() 而不是 .ExecuteQuery()
var credentials = new SharePointOnlineCredentials("user@domain", password); 注意，密码是 Microsoft.SharePoint.Client.Runtime.Portable.

当运行 CsomCall 访问时失败 web.Title:

Microsoft.SharePoint.Client.PropertyOrFieldNotInitializedException: 'The property or field 'Title' has not been initialized. It has not been requested or the request has not been executed. It may need to be explicitly requested.'

当运行 RestCall 失败并在 client.DownloadString 上出现错误：

System.Net.WebException: 'The remote server returned an error: (401) Unauthorized.'

是否可以设置 SharePointOnlineCredentials 以使用 .NET Core？对堆栈溢出的搜索表明这应该是可能的，但我似乎无法让它工作。

最终我们想使用 ASP.NET Core 构建一个 Web API 服务来为内部用户生成文档（从 SharePoint 读取文档模板，生成新文档并保存回 SharePoint）。现在使用 CSOM 或 REST，并在 Windows OS 上使用运行。

Answer 1

REST 调用错误。您必须使用凭据获取令牌。此外，WebClient 大部分已被弃用，请改用 HttpClient class。

看这个例子：

public const string BaseUri = "https://example.sharepoint.com";
private static HttpClient _client;

public static void Initialize()
{
    SharePointOnlineCredentials currentCredentials = GetCredentialsHere();

    var handler = new HttpClientHandler
    {
        Credentials = currentCredentials
    };

    _client = new HttpClient(handler);

    // you are missing this line
    handler.CookieContainer.SetCookies(BaseUri, currentCredentials.GetAuthenticationCookie(BaseUri));
    _client.BaseAddress = BaseUri;
    _client.DefaultRequestHeaders.Clear();
    _client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
    _client.MaxResponseContentBufferSize = 2147483647;
}

无法验证来自 .NET Core 的 SharePoint REST 或 CSOM 调用

Unable to authenticate SharePoint REST or CSOM calls from .NET Core

c#

sharepoint

csom

sharepoint-online

.net-core