Google SSO using multiple subdomains #9734

5 Answer(s)

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  0

  ismcagdas created 4 years ago

  Support Team

  Hi @wydeedev

  Did you set the returl URL on Google to https://mydomain.com/signin-google and try this way ? I'm not %100 sure but I remember something like this worked for me.

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  0

  wydeedev created 4 years ago

  Hi @ismcagdas, thanks for your answer.

  I've tried but with no success, it returns the same error as before.

  Do you have any workaround for this or how do you manage these kind of issues? Do you enter all the subdomains in order to authorize them? This does not sound like a good solution in the long run.

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  0

  ismcagdas created 4 years ago

  Support Team

  Hi @wydeedev

  Actually, I haven't tried Google SSO with subdomains. You can follow such an approach;

  You can use main website url for Google SSO with a tenantId query string parameter, using state parameter of Google SSO as explained here https://stackoverflow.com/a/13769166/6681451.

  Then, you can write a custom tenant resolver which is similar to https://github.com/aspnetboilerplate/aspnetboilerplate/blob/dev/src/Abp.AspNetCore/AspNetCore/MultiTenancy/DomainTenantResolveContributor.cs. This resolver should resolve tenantId from Google SSO's state paraemter.

  Then, user should be logged in correctly but in the main URL. So you also need to redirect user to related subdomain after a successfull login.

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  kfrancis created 4 years ago

  Hmm, what does this look like actually? Same problem, different oauth provider (of my own writing):

  I do know that I'll have to do something here to Request.Host to stop grabbing the subdomain since the provider only passes the callback path.

  https://github.com/Clinical-Support-Systems/oneid-oauth-middleware/blob/9ece0e71be0a70371f9d0de78ae8144ec00f502e/src/AspNet.Security.OAuth.OneID/OneIdAuthenticationHandler.cs#L398

  Perhaps something like this:

  Uri request = new Uri("http://subdomain.domain.co.uk");
  string host = request.Host;
  string hostWithoutPrefix = null;
  
  var tlds = new List<string>()
  {
      //the second- and third-level TLDs you expect go here, set to null if working with single-level TLDs only
      "co.uk"
  };
  
  if (tlds != null)
  {
      foreach (var tld in tlds)
      {
          Regex regex = new Regex($"(?<=\\.|)\\w+\\.{tld}$");
          Match match = regex.Match(host);
  
  
          if (match.Success)
              hostWithoutPrefix = match.Groups[0].Value;
      }
  }
  
  //second/third levels not provided or not found -- try single-level
  if (string.IsNullOrWhiteSpace(hostWithoutPrefix))
  {
      Regex regex = new Regex("(?<=\\.|)\\w+\\.\\w+$");
      Match match = regex.Match(host);
  
  
      if (match.Success)
          hostWithoutPrefix = match.Groups[0].Value;
  }
  

  But, do you know of a code example of including this in the query string and/or state so that I can redirect back to the right tenancy (with subdomain)?

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  0

  ismcagdas created 4 years ago

  Support Team

  Hi @kfrancis

  Sorry, I couldn't understand your question. Do you mean implementing this on your library or on the client app which uses your library ?

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