无法下载Office 365 SharePoint库项目

Question

我试图使用WebcClient.DownloadFile()下载Office 365 SharePoint库中存在的项目，但我收到此异常：

例外：

The remote server returned an error: (403) Forbidden.

示例代码：

NetworkCredential credential = new NetworkCredential("username", "password", "aaa.onmicrosoft.com");
WebClient webClient = new WebClient();
webClient.Credentials = credential;
webClient.DownloadFile(@"https://aaa.sharepoint.com/testDoc/test.pdf", @"c:/test.pdf");

Answer 1

另一种选择是利用SharePoint Online Client Components SDK中的 SharePointOnlineCredentials类 。

SharePointOnlineCredentials类表示提供访问SharePoint Online资源的凭据的对象

先决条件

SharePoint Online Client组件SDK

如何从SharePoint Online下载文件

 public static void DownloadFile(string userName, string password, string fileUrl, string filePath)
 {
        var securePassword = new SecureString();
        foreach (var c in password)
        {
            securePassword.AppendChar(c);
        }
        using (var client = new WebClient())
        {
            client.Credentials = new SharePointOnlineCredentials(userName, securePassword);
            client.Headers.Add("X-FORMS_BASED_AUTH_ACCEPTED", "f");
            client.DownloadFile(fileUrl, filePath);
        }
}

Answer 2

你需要添加一点来解决你的问题，称为Headers和UserAgent。

 public static void method()
        {
         //   NetworkCredential myCredentials = new NetworkCredential("username", "password", "aaa.onmicrosoft.com");
            WebClient w = new WebClient();
            var ua = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)";
            w.Headers["Accept"] = "/";
            w.Headers.Add(HttpRequestHeader.UserAgent, ua);
            w.Credentials = myCredentials;
          w.DownloadFile(url, @"c:/name.doc"); 
        }

它从Office 365的teamsite库中为我下载文件。但是它给了我一个下载的文件。 只留下我留下的问题：该文件不包含您要下载的真实信息。 我现在试图解决这个问题几天了 - 这是我现在最好的结果。 也许你可以通过这些新信息帮助我。 请告诉我:)

Answer 3

在朋友的帮助下，我成功破解了这个SharePoint在线身份验证的东西:)

我对WictorWilén撰写的这篇博客文章表示友好。

我的WebClient调用使用Wictors声明库代码...

var claimsHelper = new MsOnlineClaimsHelper(sharepointOnlineUrl, username, password);

var client = new WebClient();
client.Headers[ "Accept" ] = "/";
client.Headers.Add(HttpRequestHeader.UserAgent, "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)");
client.Headers.Add(HttpRequestHeader.Cookie, claimsHelper.CookieContainer.GetCookieHeader(new Uri(sharepointOnlineUrl))  );

var document = client.DownloadString( documentUrl );