使用REST请求从Office365的Delve个人资料中获取照片

Question

I have a problem with getting profile image from Delve account. Here is the example of link which returns me photo when i put it into browser: https://orgname.sharepoint.com/_vti_bin/DelveApi.ashx/people/profileimage?userId=alias@org.com&size=L

Now I need to get this photo from code. I tried such way, that works perfect for external images not in Office365:

 var credentials = new NetworkCredential("myemail", "password");
 using (var handler = new HttpClientHandler { Credentials = credentials })
 using (var client = new HttpClient(handler))
 {
     var bytes = await client.GetByteArrayAsync(url);
     return Convert.ToBase64String(bytes);
 }

But as responce I get html page with text like:

<H1>We can't sign you in</H1><p>Your browser is currently set to block cookies. You need to allow cookies to use this service.</p><p>Cookies are small text files stored on your computer that tell us when you're signed in. To learn how to allow cookies, check the online help in your web browser.</p>

I think it is related with Office365 Authorization, but I don`t know how to perform REST request to this url with my credentials...

Answer 1

Problem Solved, first we need to initialize SharePoint Context:

public ClientContext SetupSpContext()
    {
        // This builds the connection to the SP Online Server
        var clientContext = new ClientContext(_sharePointCrmDocumentsSiteName);
        var secureString = new SecureString();
        foreach (var c in _sharePointCrmDocumentsPwd.ToCharArray()) secureString.AppendChar(c);
        {
            clientContext.Credentials = new SharePointOnlineCredentials(_sharePointCrmDocumentsLoginName, secureString);
        }
        var web = clientContext.Web;
        clientContext.Load(web);
        clientContext.ExecuteQuery();
        return clientContext;
    }

Then we can Get profile picture from Shrepoint using User email:

public string DownloadProfilePictureAsBase64(string email)
    {
        try
        {
            var pictureUrl = GetPictureUrl(email);

            var fileInfo = File.OpenBinaryDirect(_sharePointContext, pictureUrl);
            using (var memory = new MemoryStream())
            {
                var buffer = new byte[1000000];

                int nread;
                while ((nread = fileInfo.Stream.Read(buffer, 0, buffer.Length)) > 0)
                {
                    memory.Write(buffer, 0, nread);
                }
                memory.Seek(0, SeekOrigin.Begin);

                var buffer2 = new byte[memory.Length];

                memory.Read(buffer2, 0, buffer2.Length);
                return Convert.ToBase64String(buffer2);
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Picture for user {email} can not be downloaded");
            Console.WriteLine(ex.Message);
        }
        return null;
    }

    private string GetPictureUrl(string email)
    {
        string targetUser = $"i:0#.f|membership|{email}";

        var peopleManager = new PeopleManager(_sharePointContext);
        var personProperties = peopleManager.GetPropertiesFor(targetUser);
        _sharePointContext.Load(personProperties, p => p.PictureUrl);
        _sharePointContext.ExecuteQuery();
        var pictureUri = new Uri(personProperties.PictureUrl);
        var localPath = pictureUri.LocalPath.Replace("MThumb", "LThumb"); //Change size of the picture

        return localPath;
    }

Answer 2

You should Microsoft Graph to get a user's picture. https://graph.microsoft.com/v1.0/me/photo gets your metadata about the profile picture, and https://graph.microsoft.com/v1.0/me/photo/ $value gets you the image. You need to use OAuth. See https://graph.microsoft.io/en-us/docs/api-reference/v1.0/api/profilephoto_get for more details.