VS2022中的官方方案中，鉴权方案会用到SqlServer，而我的项目要用MySql，两者没法兼容，遂自己写了一套。
预备：用VS2022新建一个Blazor Server项目
第一步：编写自定义的登录，退出，鉴权类 SessionObjectHelper.cs，并且在Program.cs里注册
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using Microsoft.AspNetCore.Components;
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using Microsoft.AspNetCore.Components.Server.ProtectedBrowserStorage;
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namespace BlazorAppAuthDemo
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{
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public class SessionObjectHelper
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{
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private ProtectedSessionStorage _sessionStorage;
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public SessionObjectHelper(ProtectedSessionStorage storage)
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{
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_sessionStorage = storage;
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}
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/// <summary>
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/// 是否登录
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/// </summary>
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/// <returns></returns>
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public async Task<bool> IsLogin()
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{
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var value = await _sessionStorage.GetAsync<string>("user");
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if (value.Success && !string.IsNullOrEmpty(value.Value))
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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/// <summary>
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/// 是否有权限
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/// </summary>
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/// <returns></returns>
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public async Task<bool> HasAuth(string authString)
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{
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var value = await _sessionStorage.GetAsync<string>("user");
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if (value.Success && !string.IsNullOrEmpty(value.Value))
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{
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if (!string.IsNullOrEmpty(authString) && authString.Equals(value.Value))
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{
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return true;
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}
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return false;
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}
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else
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{
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return false;
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}
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}
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public async Task<string> GetSession()
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{
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var value = await _sessionStorage.GetAsync<string>("user");
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return value.Success?value.Value:"";
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}
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public async Task SetSession(string value)
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{
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await _sessionStorage.SetAsync("user", value);
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}
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/// <summary>
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/// 设置过期
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/// </summary>
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/// <returns></returns>
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public async Task SetExpires()
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{
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await _sessionStorage.SetAsync("user", "");
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}
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}
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}
在Program.cs里注册
builder.Services.AddScoped<SessionObjectHelper>();
第二步：自定义鉴权的控件 AuthComponet.razor
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@using BlazorAppAuthDemo.Data
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@inject SessionObjectHelper Session
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@if (Logined)
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{
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@if (doNotReload)
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{
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<p>出现错误,请点此刷新</p>
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}
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else
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{
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@if (HasAuth)
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{
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<CascadingValue Value="@this">
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@ChildContent
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</CascadingValue>
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}
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else
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{
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<p>暂无权限查看...</p>
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}
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}
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}
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else
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{
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<p>尚未登录，请先 <a href="/login">登录</a></p>
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}
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@code {
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public bool Logined;
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public bool HasAuth;
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private bool doNotReload;
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[Parameter]
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public RenderFragment ChildContent { get; set; }
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[Inject]
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NavigationManager Navigation { get; set; }
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[Parameter]
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public string AuthString { get; set; }
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public string UserAuths { get; set; }
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protected override async Task OnInitializedAsync()
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{
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try
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{
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if (await Session.IsLogin())
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{
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Logined = true;
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if (await Session.HasAuth(AuthString))
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{
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HasAuth = true;
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}
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}
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}
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catch (Exception ex)
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{
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doNotReload = true;
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//Navigation.NavigateTo("/", true, true);
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}
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}
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}
第三步：使用
1、登录页面Login.razor及方法使用
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@page "/Login"
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@inject SessionObjectHelper Session
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<h3>登录</h3>
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@code {
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protected override async Task OnAfterRenderAsync(bool firstRender)
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{
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await Session.SetSession("abc");
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await base.OnAfterRenderAsync(firstRender);
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}
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}
2、退出登录页面Logout.razor及方法使用
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@page "/Logout"
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@using Microsoft.AspNetCore.Components.Server.ProtectedBrowserStorage
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@inject SessionObjectHelper Session
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<h3>Logout</h3>
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@code {
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protected override async Task OnAfterRenderAsync(bool firstRender)
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{
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await Session.SetSession(null);
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await base.OnAfterRenderAsync(firstRender);
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}
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}
3、鉴权页面Counter.razor及方法使用
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@page "/counter"
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@using BlazorAppAuthDemo.Data
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@using Microsoft.AspNetCore.Components.Server.ProtectedBrowserStorage
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<PageTitle>Counter</PageTitle>
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<h1>Counter</h1>
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<p role="status">Current count: @currentCount</p>
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<button class="btn btn-primary" @onclick="IncrementCount">Click me</button>
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<span>是否登录 @(IsLogin)</span>
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<span>是否是否有权限 @(HasAuth)</span>
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<AuthComponet>
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<span>哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈</span>
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</AuthComponet>
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@code {
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private bool IsLogin{ get; set; }
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private bool HasAuth{ get; set; }
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private int currentCount = 0;
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private void IncrementCount()
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{
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currentCount++;
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}
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[Inject]
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public SessionObjectHelper Session { get; set; } = default;
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protected override async Task OnAfterRenderAsync(bool firstRender)
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{
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if (firstRender)
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{
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IsLogin = await Session.IsLogin();
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HasAuth = await Session.HasAuth("sdef");
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this.StateHasChanged();
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}
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await base.OnAfterRenderAsync(firstRender);
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}
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}
最后：验证效果
点击Counter页面，会发现有未登录和没有权限的提示
http://localhost:2254/login
