我正在将我的多租户应用程序从Webapi迁移到aspnet core。在Webapi版本中，我使用了TenantIdentificationStrategy，该策略基于HttpContext上的请求路径来识别租户。
转移到aspnet core后，我成功地连接了autofac。但我无法弄清楚如何连接租户策略。我尝试在ConfigureServices中注入IHttpContextAccessor，如下：
services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
我的策略如下所示。
public class AssetClassIdentificationStrategy: ITenantIdentificationStrategy {
private readonly IHttpContextAccessor _accessor;
public AssetClassIdentificationStrategy(IHttpContextAccessor httpContextAccessor)
{
_accessor = httpContextAccessor;
}
public bool TryIdentifyTenant(out object tenantId) {
tenantId = null;
var context = _accessor.HttpContext;
if (context != null && context.Request != null )){
var matchRegex = new Regex(@"\/[\d,\.,\w]*\/(\w*)\/.*");
var match = matchRegex.Match(context.Request.Path.ToString());
if (match.Success) {
tenantId = match.Groups[1].Value.ToLower();
}
}
return tenantId != null;
}
}
我所看到的是，
HttpContextAccessor 被正确注入，而其中的 HttpContext 始终为 null。因此，无法解析任何多租户服务。寻找示例，但找不到适用于该问题的内容。在 Autofacv3 中曾经有一个
RequestParameterTenantIdentificationStrategy，但现在不再支持。感激任何关于此的帮助。编辑：
已修复代码问题，并添加了 Startup.cs 请求。
public class Startup
{
public Startup(IHostingEnvironment env) {
var builder = new ConfigurationBuilder()
.SetBasePath(env.ContentRootPath)
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true);
Configuration = builder.Build();
}
public IConfigurationRoot Configuration { get; }
public IServiceProvider ConfigureServices(IServiceCollection services)
{
services.Configure<CacheConfig>(Configuration.GetSection("Caching"),false);
services.AddMvc();
services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
services.AddTransient<ITenantIdentificationStrategy,AssetClassIdentificationStrategy>();
var builder = new ContainerBuilder();
builder.Populate(services);
builder.RegisterType<TenantInfo>().WithProperty("TenantName", "unknown").As<ITenantInfo>();
var container = builder.Build();
ITenantIdentificationStrategy tenantIdentificationStrategy;
bool isMultiTenant = container.TryResolve(out tenantIdentificationStrategy);
var mtc = new MultitenantContainer(tenantIdentificationStrategy, container);
mtc.ConfigureTenant("pesonalLoans", b => {
b.RegisterType<TenantInfo>().WithProperty("TenantName","pesonalLoans") .As<ITenantInfo>();
});
mtc.ConfigureTenant("retirement", b => {
b.RegisterType<TenantInfo>().WithProperty("TenantName", "retirement").As<ITenantInfo>();
});
return mtc.Resolve<IServiceProvider>();
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
LoggingConfig.Register(Configuration, loggerFactory);
app.UseMvc();
}
}
public class ValuesController : Controller {
private ITenantInfo _tenant;
public ValuesController(ITenantInfo tenant) {
_tenant = tenant;
}
[HttpGet]
public string Get()
{
return _tenant.TenantName;
}
}
public interface ITenantInfo {
string TenantName { get; set; }
}
public class TenantInfo: ITenantInfo
{
public string TenantName { get; set; }
}
Edit 3 project.json
{
"dependencies": {
"Microsoft.NETCore.App": {
"version": "1.0.0-rc2-3002702",
"type": "platform"
},
"Microsoft.AspNetCore.Mvc": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-rc2-final",
"Microsoft.AspNetCore.Server.Kestrel": "1.0.0-rc2-final",
"Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-rc2-final",
"Microsoft.Extensions.Configuration.FileExtensions": "1.0.0-rc2-final",
"Microsoft.Extensions.Configuration.Json": "1.0.0-rc2-final",
"Microsoft.Extensions.Logging": "1.0.0-rc2-final",
"Microsoft.Extensions.Logging.Console": "1.0.0-rc2-final",
"Microsoft.Extensions.Logging.Debug": "1.0.0-rc2-final",
"Autofac": "4.0.0-rc2-240",
"Autofac.Multitenant": "4.0.0-beta8-219",
"System.IdentityModel.Tokens.Jwt": "5.0.0-rc2-305061149",
"Autofac.Extensions.DependencyInjection": "4.0.0-rc2-240",
"System.Reflection": "4.1.0-rc2-24027",
"System.Reflection.Primitives": "4.0.1-rc2-24027",
"System.Reflection.Extensions": "4.0.1-rc2-24027",
"System.Reflection.TypeExtensions": "4.1.0-rc2-24027",
"System.Reflection.Emit": "4.0.1-rc2-24027",
"System.Reflection.Context": "4.0.1-rc2-24027",
"System.Reflection.DispatchProxy": "4.0.1-rc2-24027",
"System.Reflection.Emit.ILGeneration": "4.0.1-rc2-24027",
"Microsoft.AspNetCore.Diagnostics": "1.0.0-rc2-final",
"Microsoft.AspNet.Mvc.Formatters.Xml": "6.0.0-rc1-final",
"Microsoft.AspNet.Mvc.Formatters.Json": "6.0.0-rc1-final",
},
"tools": {
"Microsoft.AspNetCore.Server.IISIntegration.Tools": {
"version": "1.0.0-preview1-final",
"imports": "portable-net45+win8+dnxcore50"
}
},
"frameworks": {
"netcoreapp1.0": {
"imports": [
"dotnet5.6",
"dnxcore50",
"portable-net45+win8"
]
}
},
"buildOptions": {
"emitEntryPoint": true,
"preserveCompilationContext": true
},
"runtimeOptions": {
"gcServer": true
},
"scripts": {
"postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
}
}