fix issue https://gitee.com/yubaolee/OpenAuth.Core/issues/I383XZ

Infrastructure/Utilities/HttpContextUtil.cs

@@ -0,0 +1,40 @@
+using Infrastructure.Extensions.AutofacManager;
+using Microsoft.AspNetCore.Http;
+
+namespace Infrastructure.Utilities
+{
+    public static class HttpContextUtil
+    {
+        private static IHttpContextAccessor _accessor=AutofacContainerModule.GetService<IHttpContextAccessor>();
+
+        public static Microsoft.AspNetCore.Http.HttpContext Current => _accessor.HttpContext;
+        
+        /// <summary>
+        /// 获取租户ID
+        /// </summary>
+        /// <returns></returns>
+        public static string GetTenantId(this IHttpContextAccessor accessor)
+        {
+            string tenantId = "OpenAuthDBContext";
+            
+            if (accessor != null && accessor.HttpContext != null)
+            {
+                //读取多租户ID
+                var httpTenantId = accessor.HttpContext.Request.Query[Define.TENANT_ID];
+                if (string.IsNullOrEmpty(httpTenantId))
+                {
+                    httpTenantId = accessor.HttpContext.Request.Headers[Define.TENANT_ID];
+                }
+                
+                //如果没有租户id，或租户用的是默认的OpenAuthDBContext,则不做任何调整
+                if (!string.IsNullOrEmpty(httpTenantId))
+                {
+                    tenantId = httpTenantId;
+                }
+            }
+
+            return tenantId;
+        }
+        
+    }
+}