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Devendra Singh's avatar
Devendra Singh
Copper Contributor
Mar 01, 2017

SharePoint 2013 on-premise REST APIs authentication from web application hosted outside SharePoint

We have a requirement wherein, we will need to retreive some data from sites and lists hosted in SharePoint 2013 on-premise into an externally hosted .Net web application. The obvious thought was to the execute SharePoint REST APIs from the externally hosted .Net web application however, we got stuck with the authentication issue as it will be cross-domain.
The .Net web application is also expected to support AD authentication however, how to get it to pass the same to the REST API request?
 
Hence, we were thinking what are the options, one thought is to use the cross-domain library from SharePoint however, we couldn't find samples around this (most of what we find where actually related to apps/addins).
 
So, is cross-domain library is the only option for our scenario or are there any more options? Please suggest.

apis
developer

5 Replies

  • paulschaeflein's avatar
    paulschaeflein
    MVP
    Mar 01, 2017

    Your .Net web application will need to use the TokenHelper.cs classes to request an access token. That access token must be sent in the Authorization header.

     

    Unless you have already configured your farm to connect with an O365 tenant, you should use the S2S methods in TokenHelper.

    • Devendra Singh's avatar
      Devendra Singh
      Copper Contributor
      Mar 02, 2017

      I believe tokenhelper will be useful in SharePoint Online scenarios however, as mentioned we are completely working on SharePoint On-premise.

      So, both SharePoint and .Net web application reside on-premise however hosted separately in different envrionments in on-premise.

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