首先我们需要创建一个 MasaFramework 模板的项目，项目名称 TokenDemo，项目类型如图所示：
删除 Web/TokenDemo.Admin 项目，新建 Masa Blazor Pro 项目模板项目，项目位置在 src/Web 项目：
项目类型选择 ServerAndWasm，为了让我们支持俩种模式：
创建完成以后的目录，然后在 TokenDemo.Admin 中添加项目引用 TokenDemo.Caller。
配置 EntityFrameworkCore 和 Sqlite
修改 TokenDemo.Service 项目的包依赖为预览版
<ItemGroup>
<PackageReference Include="Masa.BuildingBlocks.Dispatcher.Events" Version="1.0.0-preview.18" />
<PackageReference Include="Masa.Contrib.Data.Contracts" Version="1.0.0-preview.18" />
<PackageReference Include="Masa.Contrib.Data.EFCore.Sqlite" Version="1.0.0-preview.18" />
<PackageReference Include="Masa.Contrib.Dispatcher.Events" Version="1.0.0-preview.18" />
<PackageReference Include="Masa.Contrib.Dispatcher.IntegrationEvents.EventLogs.EFCore" Version="1.0.0-preview.18" />
<PackageReference Include="FluentValidation" Version="11.5.1" />
<PackageReference Include="FluentValidation.AspNetCore" Version="11.2.2" />
<PackageReference Include="Masa.Utils.Extensions.DependencyInjection" Version="1.0.0-preview.18" />
<PackageReference Include="Masa.Contrib.Service.MinimalAPIs" Version="1.0.0-preview.18" />
<PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="6.0.3" />
<PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
</ItemGroup>
Masa.Contrib.Data.Contracts 提供了数据过滤的能力, 但它不是必须的，然后会出现报错，LogMiddleware将代码修改为以下代码：
namespace TokenDemo.Service.Infrastructure.Middleware;
public class LogMiddleware<TEvent> : EventMiddleware<TEvent>
where TEvent : notnull, IEvent
{
private readonly ILogger<LogMiddleware<TEvent>> _logger;
public LogMiddleware(ILogger<LogMiddleware<TEvent>> logger)
{
_logger = logger;
}
public override async Task HandleAsync(TEvent action, EventHandlerDelegate next)
{
var typeName = action.GetType().FullName;
_logger.LogInformation("----- command {CommandType}", typeName);
await next();
}
}
ValidatorMiddleware 将代码修改为以下代码：
namespace TokenDemo.Service.Infrastructure.Middleware;
public class ValidatorMiddleware<TEvent> : EventMiddleware<TEvent>
where TEvent : notnull, IEvent
{
private readonly ILogger<ValidatorMiddleware<TEvent>> _logger;
private readonly IEnumerable<IValidator<TEvent>> _validators;
public ValidatorMiddleware(IEnumerable<IValidator<TEvent>> validators, ILogger<ValidatorMiddleware<TEvent>> logger)
{
_validators = validators;
_logger = logger;
}
public override async Task HandleAsync(TEvent action, EventHandlerDelegate next)
{
var typeName = action.GetType().FullName;
_logger.LogInformation("----- Validating command {CommandType}", typeName);
var failures = _validators
.Select(v => v.Validate(action))
.SelectMany(result => result.Errors)
.Where(error => error != null)
.ToList();
if (failures.Any())
{
_logger.LogWarning("Validation errors - {CommandType} - Command: {@Command} - Errors: {@ValidationErrors}", typeName, action, failures);
throw new ValidationException("Validation exception", failures);
}
await next();
}
}
OrderEventHandler 将代码修改为以下代码：
namespace TokenDemo.Service.Infrastructure.Handlers;
public class OrderEventHandler
{
readonly IOrderRepository _orderRepository;
public OrderEventHandler(IOrderRepository orderRepository)
{
_orderRepository = orderRepository;
}
[EventHandler(Order = 1)]
public async Task HandleAsync(QueryOrderListEvent @event)
{
@event.Orders = await _orderRepository.GetListAsync();
}
}
public class OrderEventAfterHandler : IEventHandler<QueryOrderListEvent>
{
public async Task HandleAsync(QueryOrderListEvent @event, CancellationToken cancellationToken = new CancellationToken())
{
await Task.CompletedTask;
}
}
修改 appsettings.json 添加 Sqlite 地址：
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft": "Warning",
"Microsoft.Hosting.Lifetime": "Information"
}
},
"AllowedHosts": "*",
"ConnectionStrings": {
"DefaultConnection": "Data Source=Catalog.db;"
}
}
修改 Program.cs 代码：
using TokenDemo.Service.Infrastructure;
var builder = WebApplication.CreateBuilder(args);
builder.Services
.AddAuthorization()
.AddAuthentication(options =>
{
options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
})
.AddJwtBearer(options =>
{
options.Authority = "";
options.RequireHttpsMetadata = false;
options.Audience = "";
});
builder.Services.AddMasaDbContext<ShopDbContext>(dbContextBuilder =>
{
dbContextBuilder
.UseSqlite() //使用Sqlite数据库
.UseFilter(); //数据数据过滤
});
builder.Services.AddAutoInject();
var app = builder.Services
.AddEndpointsApiExplorer()
.AddSwaggerGen(options =>
{
options.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme()
{
Name = "Authorization",
Type = SecuritySchemeType.ApiKey,
Scheme = "Bearer",
BearerFormat = "JWT",
In = ParameterLocation.Header,
Description = "JWT Authorization header using the Bearer scheme. \r\n\r\n Enter 'Bearer' [space] and then your token in the text input below.\r\n\r\nExample: \"Bearer xxxxxxxxxxxxxxx\"",
});
options.AddSecurityRequirement(new OpenApiSecurityRequirement
{
{
new OpenApiSecurityScheme
{
Reference = new OpenApiReference
{
Type = ReferenceType.SecurityScheme,
Id = "Bearer"
}
},
new string[] {}
}
});
})
.AddFluentValidationAutoValidation().AddFluentValidationClientsideAdapters()
.AddEventBus(eventBusBuilder =>
{
eventBusBuilder.UseMiddleware(typeof(ValidatorMiddleware<>));
eventBusBuilder.UseMiddleware(typeof(LogMiddleware<>));
})
.AddServices(builder);
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseHttpsRedirection();
app.Run();
添加 EFCore 迁移依赖：
<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="6.0.15">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="6.0.15">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>
在程序包管理器控制台中输入 Add-Migration Init生成 Init 的迁移文件（如果出现 error NETSDK1082: Microsoft.AspNetCore.App 没有运行时包可用于指定的 RuntimeIdentifier“browser-wasm”这个错误的话就先把TokenDemo.Admin.WebAssembly项目移除）。
使用Update-Database生成Sqlitem。
然后就可以看到项目中生成了Catalog.db文件。
启动 TokenDemo.Service.Order 我们就可以看到 Swagger 的界面了。
如何对接接口
打开 TokenDemo.Caller 项目中的Callers\OrderCaller.cs文件，修改BaseAdderss为TokenDemo.Service.Order的服务地址，打开TokenDemo.Service.Order项目的Services\OrderService.cs文件并且修改代码：
namespace TokenDemo.Service.Services;
public class OrderService : ServiceBase
{
public OrderService(IServiceCollection services) : base(services)
{
App.MapGet("/order/list", QueryList).Produces<List<Infrastructure.Entities.Order>>()
.WithName("GetOrders");
}
public async Task<IResult> QueryList(IEventBus eventBus)
{
var orderQueryEvent = new QueryOrderListEvent();
await eventBus.PublishAsync(orderQueryEvent);
return Results.Ok(orderQueryEvent.Orders);
}
}
然后在通过命令行启动TokenDemo.Service.Order项目：
打开TokenDemo\Admin项目的Pages\Home\Index.razor文件并且修改代码：
@page "/"
@using TokenDemo.Caller.Callers
@inherits LayoutComponentBase
@inject NavigationManager Nav
@inject OrderCaller OrderCaller
@code {
protected override async Task OnAfterRenderAsync(bool firstRender)
{
Nav.NavigateTo(GlobalVariables.DefaultRoute,true);
var data = await OrderCaller.GetListAsync();
await base.OnAfterRenderAsync(firstRender);
}
}
并且在await base.OnAfterRenderAsync(firstRender);这里打一个断点用于查看是否获取到消息，打开TokenDemo.Admin.Server项目的Program.cs，添加以下代码:
builder.Services.AddCaller(typeof(TokenDemo.Caller.Callers.OrderCaller).Assembly);
然后启动 TokenDemo.Admin.Server 项目，进入断点:
得到结果。
结尾
通过上文我们可以基本将 MasaFramework 的使用掌握，前端和后端的接口也掌握了。
当前是 MasaFramework 的第三篇入门，我会继续学习 MasaFramework 并且分享给大家。
来自 token 的分享。
- MASA Framework
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