Blog Post

Microsoft SharePoint Blog
5 MIN READ

Fixing issue in making cross domain Ajax call to SharePoint REST service in Chrome

SPDev_Support's avatar
SPDev_Support
Icon for Microsoft rankMicrosoft
May 01, 2019
First published on TECHNET on Jun 10, 2017 Updated on 6/4/2020 to fix an error This post is a contribution from Jing Wang, an engineer with the SharePoint Developer Support team Symptom: A ...
Updated Apr 30, 2021
Version 9.0
Developer Support
Gabriel Smoljar's avatar
Gabriel Smoljar
Brass Contributor
Jul 11, 2023

We are not using NTLM. Both SharePoint and app is configured to use Windows Auth with Negotiate/Kerberos.

 

Yes, we are using the S2S token helper with a WindowsIdentity object to get an access token from SharePoint that can be used from Javascript for file uploads. Most requests are proxied through our server side code but file uploads we would rather send directly to SharePoint, which is a CORS request. 

 

I don't get prompted to sign in to SharePoint if I open the app first, and vice verca if that helps.