How to use AbpSession in the Global.asax #1897

jefftindall created 7 years ago

If the goal is to filter database requests based on the subdomain, then you can use an interceptor on the application services to set the tenant ID on the unit of work.

public class SubdomainTenantInterceptor : IInterceptor
    {
        private readonly IUnitOfWorkManager _unitOfWorkManager;

        public SubdomainTenantInterceptor(IUnitOfWorkManager unitOfWorkManager)
        {
            _unitOfWorkManager = unitOfWorkManager;
        }

        public void Intercept(IInvocation invocation)
        {
            if (_unitOfWorkManager.Current != null)
            {
                if (HttpContext.Current.Request.Url.HostNameType == UriHostNameType.Dns)
                {
                    var cacheManager = IocManager.Instance.Resolve<ICacheManager>();
                    var tenantCache = cacheManager.GetCache<string, Tenant>("TenantCache");

                    // Try to get tenant name from sub-domain
                    string tenantName = HttpContext.Current.Request.Url.Host.Split('.')[0];

                    Tenant t = tenantCache.Get(tenantName,
                        () =>
                        {
                        // attempt to look up
                        return AsyncContext.Run<Tenant>(() => GetTenant(tenantName));
                        });

                    if (t != null)
                    {
                        // Set tenant ID
                        _unitOfWorkManager.Current.SetTenantId(t.Id);
                    }
                }
            }

            invocation.Proceed();
        }

        private async Task<Tenant> GetTenant(string tenantName)
        {
            TenantManager manager = IocManager.Instance.Resolve<TenantManager>();
            Tenant t = await manager.FindByTenancyNameAsync(tenantName);
            return t;
        }
    }

and register it in the WebModule

public override void PreInitialize()
        {
            //...
            Configuration.IocManager.IocContainer.Kernel.ComponentRegistered += Kernel_ComponentRegistered;
        }

        private void Kernel_ComponentRegistered(string key, Castle.MicroKernel.IHandler handler)
        {
            if (typeof(IApplicationService).IsAssignableFrom(handler.ComponentModel.Implementation))
            {
                handler.ComponentModel.Interceptors.Add
                (new InterceptorReference(typeof(SubdomainTenantInterceptor)));
            }
        }

For unauthenticated requests, you may also need this information on the client side. In that case, modify the SessionAppService.

public async Task<GetCurrentLoginInformationsOutput> GetCurrentLoginInformations()
        {
            var output = new GetCurrentLoginInformationsOutput
            {
                User = (await GetCurrentUserAsync()).MapTo<UserLoginInfoDto>()
            };

            if (AbpSession.TenantId.HasValue)
            {
                output.Tenant = (await GetCurrentTenantAsync()).MapTo<TenantLoginInfoDto>();
            }
            else
            {
                int? tenantId = _unitOfWorkManager.Current.GetTenantId();
                if (tenantId.HasValue)
                {
                    output.Tenant = (await TenantManager.GetByIdAsync(tenantId.Value)).MapTo<TenantLoginInfoDto>();
                }
            }

            return output;
        }

If using the default header.js, then you'll need to add additional checks to avoid null references.

vm.getShownUserName = function () {
                if (!abp.multiTenancy.isEnabled) {
                    return appSession.user.userName;
                } else {
                    if (appSession.tenant && appSession.user) {
                        return appSession.tenant.tenancyName + '\\' + appSession.user.userName;
                    } else {
                        if (appSession.user)
                            return '.\\' + appSession.user.userName;
                        else
                            return '';
                    }
                }
            };

How to use AbpSession in the Global.asax #1897

1 Answer(s)