Forum Discussion
Suddenly getting 401 error accessing SPS Online
Hi All. Since yesterday my c# code stopped working when trying to access SPS Online (and Project PWA in specific) through HttpWebRequest interface while CSOM continue to work as expected. in both c...
Hi,
Just FYI, here is the piece of updated code i have used and now it is working fine.
The one in BOLD is the new line of code that i have used to make it working.
SecureString passWord = new SecureString();
foreach (char c in m_Password.ToCharArray()) passWord.AppendChar(c);
var credentials = new SharePointOnlineCredentials("UserName, passWord);
string metaDataURL = "ProjectOnlineURL";
var req = (HttpWebRequest)WebRequest.Create(metaDataURL);
req.Credentials = credentials;req.Headers["X-FORMS_BASED_AUTH_ACCEPTED"] = "f";
req.Headers.Add(HttpRequestHeader.Cookie, credentials.GetAuthenticationCookie(new Uri(metaDataURL)));
var resp = (HttpWebResponse)req.GetResponse();Regards,
Sunil G.
Have you decorated your code as suggested here: https://docs.microsoft.com/en-us/sharepoint/dev/general-development/how-to-avoid-getting-throttled-or-blocked-in-sharepoint-online?
Thank you Juan Carlos.
In this specific case it looks like a specific problem with HttpWebRequest authentication while throttling impacts CSOM as well.
Anyway it's a very good point too take care of.
In this specific case it looks like a specific problem with HttpWebRequest authentication while throttling impacts CSOM as well.
Anyway it's a very good point too take care of.
