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本篇內(nèi)容主要講解“ABP框架中Session功能的用法介紹”,感興趣的朋友不妨來(lái)看看。本文介紹的方法操作簡(jiǎn)單快捷,實(shí)用性強(qiáng)。下面就讓小編來(lái)帶大家學(xué)習(xí)“ABP框架中Session功能的用法介紹”吧!
關(guān)于IAbpSession
需要獲取會(huì)話信息則必須實(shí)現(xiàn)IAbpSession接口。雖然你可以用自己的方式去實(shí)現(xiàn)它(IAbpSession),但是它在module-zero項(xiàng)目中已經(jīng)有了完整的實(shí)現(xiàn)。
注入Session
IAbpSession通常是以屬性注入的方式存在于需要它的類(lèi)中,不需要獲取會(huì)話信息的類(lèi)中則不需要它。如果我們使用屬性注入方式,我們可以用
NullAbpSession.Instance作為默認(rèn)值來(lái)初始化它(IAbpSession),如下所示:
public class MyClass : ITransientDependency { public IAbpSession AbpSession { get; set; } public MyClass() { AbpSession = NullAbpSession.Instance; } public void MyMethod() { var currentUserId = AbpSession.UserId; //... } }
由于授權(quán)是應(yīng)用層的任務(wù),因此我們應(yīng)該在應(yīng)用層和應(yīng)用層的上一層使用IAbpSession(我們不在領(lǐng)域?qū)邮褂肐AbpSession是很正常的)。
ApplicationService, AbpController 和 AbpApiController 這3個(gè)基類(lèi)已經(jīng)注入了AbpSession屬性,因此在Application Service的實(shí)例方法中,能直接使用AbpSession屬性。
使用Session屬性
AbpSession定義的一些關(guān)鍵屬性:
UserId: 當(dāng)前用戶的標(biāo)識(shí)ID,如果沒(méi)有當(dāng)前用戶則為null.如果需要授權(quán)訪問(wèn)則它不可能為空。
TenantId: 當(dāng)前租戶的標(biāo)識(shí)ID,如果沒(méi)有當(dāng)前租戶則為null。
MultiTenancySide: 可能是Host或Tenant。
UserId和TenantId是可以為null的。當(dāng)然也提供了不為空時(shí)獲取數(shù)據(jù)的 GetUserId()和GetTenantId() 方法 。當(dāng)你確定有當(dāng)前用戶時(shí),你可以使用GetUserId()方法。
如果當(dāng)前用戶為空,使用該方法則會(huì)拋出一個(gè)異常。GetTenantId()的使用方式和GetUserId()類(lèi)似。
ABP如何實(shí)現(xiàn)Session的
目錄代碼:
類(lèi)圖:
IAbpSession:IAbpSession接口
using Abp.MultiTenancy; namespace Abp.Runtime.Session { public interface IAbpSession { long? UserId { get; } int? TenantId { get; } MultiTenancySides MultiTenancySide { get; } long? ImpersonatorUserId { get; } int? ImpersonatorTenantId { get; } } }
NullAbpSession:實(shí)現(xiàn)了空對(duì)象模式
using Abp.MultiTenancy; namespace Abp.Runtime.Session { /// <summary> /// Implements null object pattern for <see cref="IAbpSession"/>. /// </summary> public class NullAbpSession : IAbpSession { /// <summary> /// Singleton instance. /// </summary> public static NullAbpSession Instance { get { return SingletonInstance; } } private static readonly NullAbpSession SingletonInstance = new NullAbpSession(); /// <inheritdoc/> public long? UserId { get { return null; } } /// <inheritdoc/> public int? TenantId { get { return null; } } public MultiTenancySides MultiTenancySide { get { return MultiTenancySides.Tenant; } } public long? ImpersonatorUserId { get { return null; } } public int? ImpersonatorTenantId { get { return null; } } private NullAbpSession() { } } }
ClaimsAbpSession:獲取會(huì)話狀態(tài)
using System; using System.Linq; using System.Security.Claims; using System.Threading; using Abp.Configuration.Startup; using Abp.MultiTenancy; using Abp.Runtime.Security; namespace Abp.Runtime.Session { /// <summary> /// Implements <see cref="IAbpSession"/> to get session properties from claims of <see cref="Thread.CurrentPrincipal"/>. /// </summary> public class ClaimsAbpSession : IAbpSession { private const int DefaultTenantId = 1; public virtual long? UserId { get { var claimsPrincipal = Thread.CurrentPrincipal as ClaimsPrincipal; if (claimsPrincipal == null) { return null; } var claimsIdentity = claimsPrincipal.Identity as ClaimsIdentity; if (claimsIdentity == null) { return null; } var userIdClaim = claimsIdentity.Claims.FirstOrDefault(c => c.Type == ClaimTypes.NameIdentifier); if (userIdClaim == null || string.IsNullOrEmpty(userIdClaim.Value)) { return null; } long userId; if (!long.TryParse(userIdClaim.Value, out userId)) { return null; } return userId; } } public virtual int? TenantId { get { if (!_multiTenancy.IsEnabled) { return DefaultTenantId; } var claimsPrincipal = Thread.CurrentPrincipal as ClaimsPrincipal; if (claimsPrincipal == null) { return null; } var tenantIdClaim = claimsPrincipal.Claims.FirstOrDefault(c => c.Type == AbpClaimTypes.TenantId); if (tenantIdClaim == null || string.IsNullOrEmpty(tenantIdClaim.Value)) { return null; } return Convert.ToInt32(tenantIdClaim.Value); } } public virtual MultiTenancySides MultiTenancySide { get { return _multiTenancy.IsEnabled && !TenantId.HasValue ? MultiTenancySides.Host : MultiTenancySides.Tenant; } } public virtual long? ImpersonatorUserId { get { var claimsPrincipal = Thread.CurrentPrincipal as ClaimsPrincipal; if (claimsPrincipal == null) { return null; } var impersonatorUserIdClaim = claimsPrincipal.Claims.FirstOrDefault(c => c.Type == AbpClaimTypes.ImpersonatorUserId); if (impersonatorUserIdClaim == null || string.IsNullOrEmpty(impersonatorUserIdClaim.Value)) { return null; } return Convert.ToInt64(impersonatorUserIdClaim.Value); } } public virtual int? ImpersonatorTenantId { get { if (!_multiTenancy.IsEnabled) { return DefaultTenantId; } var claimsPrincipal = Thread.CurrentPrincipal as ClaimsPrincipal; if (claimsPrincipal == null) { return null; } var impersonatorTenantIdClaim = claimsPrincipal.Claims.FirstOrDefault(c => c.Type == AbpClaimTypes.ImpersonatorTenantId); if (impersonatorTenantIdClaim == null || string.IsNullOrEmpty(impersonatorTenantIdClaim.Value)) { return null; } return Convert.ToInt32(impersonatorTenantIdClaim.Value); } } private readonly IMultiTenancyConfig _multiTenancy; /// <summary> /// Constructor. /// </summary> public ClaimsAbpSession(IMultiTenancyConfig multiTenancy) { _multiTenancy = multiTenancy; } } }
AbpSessionExtensions:IAbpSession擴(kuò)展方法
using System; namespace Abp.Runtime.Session { /// <summary> /// Extension methods for <see cref="IAbpSession"/>. /// </summary> public static class AbpSessionExtensions { /// <summary> /// Gets current User's Id. /// Throws <see cref="AbpException"/> if <see cref="IAbpSession.UserId"/> is null. /// </summary> /// <param name="session">Session object.</param> /// <returns>Current User's Id.</returns> public static long GetUserId(this IAbpSession session) { if (!session.UserId.HasValue) { throw new AbpException("Session.UserId is null! Probably, user is not logged in."); } return session.UserId.Value; } /// <summary> /// Gets current Tenant's Id. /// Throws <see cref="AbpException"/> if <see cref="IAbpSession.TenantId"/> is null. /// </summary> /// <param name="session">Session object.</param> /// <returns>Current Tenant's Id.</returns> /// <exception cref="AbpException"></exception> public static int GetTenantId(this IAbpSession session) { if (!session.TenantId.HasValue) { throw new AbpException("Session.TenantId is null! Possible problems: No user logged in or current logged in user in a host user (TenantId is always null for host users)."); } return session.TenantId.Value; } /// <summary> /// Creates <see cref="UserIdentifier"/> from given session. /// Returns null if <see cref="IAbpSession.UserId"/> is null. /// </summary> /// <param name="session">The session.</param> public static UserIdentifier ToUserIdentifier(this IAbpSession session) { return session.UserId == null ? null : new UserIdentifier(session.TenantId, session.GetUserId()); } } }
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