How to Set Tenant According to Domain or Subdomain? #12594

3 Answer(s)

• 

  0

  oguzhanagir created 9 months ago

  Support Team

  Hi @sarpayonerliberty

  Since you want to run the same application under two different subdomains with a fixed behavior, the cleanest solution is to implement a custom ITenantResolveContributor and place it at the beginning of the tenant resolution pipeline.

  You can create a custom resolver like below:

  public class FixedSubdomainTenantResolveContributor 
      : ITenantResolveContributor, ITransientDependency
  {
      private readonly IHttpContextAccessor _httpContextAccessor;
  
      public FixedSubdomainTenantResolveContributor(
          IHttpContextAccessor httpContextAccessor)
      {
          _httpContextAccessor = httpContextAccessor;
      }
  
      public int Order => 0; // Ensure this runs before default resolvers
  
      public string Name => "FixedSubdomain";
  
      public Task ResolveAsync(ITenantResolveContext context)
      {
          var httpContext = _httpContextAccessor.HttpContext;
          if (httpContext == null)
          {
              return Task.CompletedTask;
          }
  
          var host = httpContext.Request.Host.Host.ToLowerInvariant();
  
          if (host == "www.mycompany.com")
          {
              // Resolve to a specific tenant
              context.TenantId = 1;
          }
          else if (host == "host.mycompany.com")
          {
              // Host context
              context.TenantId = null;
          }
  
          return Task.CompletedTask;
      }
  }
  

  Then register it in your core module:

  Configuration.MultiTenancy.Resolvers.Insert(
      0,
      typeof(FixedSubdomainTenantResolveContributor)
  );
  

  If you need any assistance after implementing this approach, please do not hesitate to contact us.

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• 

  0

  sarpayonerliberty created 9 months ago

  Hi Oğuzhan, I think ITenantResolveContext interface does not exist in the AspNetZero project. I saw it in an abp.io document page. With your suggestion, I implemented like below, but the login page could not be loaded.

  public class FixedSubdomainTenantResolveContributor(IHttpContextAccessor httpContextAccessor)
      : ITenantResolveContributor, ITransientDependency
  {
      public int? ResolveTenantId()
      {
          var httpContext = httpContextAccessor.HttpContext;
  
          if (httpContext == null)
          {
              return null;
          }
          
          var host = httpContext.Request.Host.Host.ToLowerInvariant();
          if (host == "localhost")
          {
              // Resolve to a specific tenant
              return 1;
          }
  
          return null;
      }
  }
  

  public override void PreInitialize()
  {
      Configuration.MultiTenancy.Resolvers.Insert(
          0,
          typeof(FixedSubdomainTenantResolveContributor)
      );
  }
  

  When I run the host project, I got the below error on the console. AspNet side does not show any error.

  

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• 

  0

  oguzhanagir created 9 months ago

  Support Team

  Hi @sarpayonerliberty

  Yes, you're absolutely right, there's been a slight misunderstanding. In your scenario, it would be much more accurate to overwrite the DomainTenantResolveContributor (File) in the ABP package. Here, you can check the subdomain by verifying the value returned from the IsDomainFormatValid function and perform Tenant Id resolution. You need to register the custom Contributor you created back into the Core module.

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