我通过 API 接口对 SharePoint Online 用户进行身份验证。在过去的几年里,它一直运行良好。但是从星期一开始我就收到错误
<块引用>值不能为空。参数名称:cookieHeader
有一个代码可以在 Azure 上托管的 API 中为 SharePoint Online 生成 HTTPClientHandler。
HttpClientHandler result = new HttpClientHandler();
try
{
SecureString securePassword = new SecureString();
foreach (char c in userPassword) { securePassword.AppendChar(c); }
SharePointOnlineCredentials credentials = new SharePointOnlineCredentials(userName, securePassword);
result.Credentials = credentials;
string authCookieValue = credentials.GetAuthenticationCookie(new Uri(hostWebURL));
result.CookieContainer.SetCookies(new Uri(hostWebURL), authCookieValue);
}
catch (Exception ex)
{
throw ex;
}
return result;
在上面的代码行中,我们得到了‘authCookieValue’的空值。
我还使用以下命令通过 SharePoint Online Management Shell 检查了“LegacyAuthProtocolsEnabled”的值,它已经是正确的。
$TenantSettings = Get-SPOTenant
$TenantSettings.LegacyAuthProtocolsEnabled
答案 0 :(得分:0)
我在某个时候开始遇到同样的错误。这显然是 Sharepoint Online 方面的变化,因为多年来我方面没有任何变化。
我认为为我修复它的关键是:
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
见下文:
public async Task<List<SharepointDocumentDetail>> GetFileInfoFromSharepoint(string specificFolderUrl)
{
// Once I added this, the error went away
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
List<SharepointDocumentDetail> ret = new List<SharepointDocumentDetail>();
var restUrl = string.Format("{0}/_api/web/GetFolderByServerRelativeUrl('{1}')/Files?$expand=Files", this.Sharepoint_DocRootUrl, specificFolderUrl);
//Creating Credentials
var passWord = new SecureString();
foreach (var c in this.Sharepoint_Password) passWord.AppendChar(c);
var credential = new SharePointOnlineCredentials(this.Sharepoint_User, passWord);
using (var handler = new HttpClientHandler() { Credentials = credential })
{
Uri uri = new Uri(this.Sharepoint_DocRootUrl);
// I was getting the error on this line
handler.CookieContainer.SetCookies(uri, credential.GetAuthenticationCookie(uri));
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