LindDotNetCore~授权中间件的介绍

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LindDotNetCore中间件

大叔认识中间件就是主要对http请求进行拦截，然后添加具体个性化功能的逻辑，这种把请求切开，添加新逻辑的方式一般称为面向方面的逻辑AOP！

授权中间件

请求链跟踪中间件

响应时间中间件

授权中间件

请求有效性的校验

授权参数

/// <summary>
/// 授权配置
/// </summary>
public class AuthorizationConfig
{
/// <summary>
/// 统一密钥
/// </summary>
public string EncryptKey { get; set; }
/// <summary>
/// 过期时间秒数
/// </summary>
public int ExpiredSecond { get; set; }
/// <summary>
/// 被授权的app
/// </summary>
public string[] AppList { get; set; }
}

客户端请求参数

/// <summary>
/// 从http请求发过来的授权实体
/// </summary>
public class AuthorizationRequestInfo
{
public string ApplicationId { get; set; }
public string Timestamp { get; set; }
public string Sinature { get; set; }
}

请求拦截器，处理请求有效性，对app，过期时间，加密方式进行校验

string computeSinature = MD5($"{requestInfo.ApplicationId}-{requestInfo.Timestamp}-{_options.EncryptKey}");
double tmpTimestamp;
if (computeSinature.Equals(requestInfo.Sinature) &&
double.TryParse(requestInfo.Timestamp, out tmpTimestamp))
{
if (ValidateExpired(tmpTimestamp, _options.ExpiredSecond))
{
await ReturnTimeOut(context);
}
else
{
await ValidateApp(context, requestInfo.ApplicationId);
}
}
else
{
await ReturnNotAuthorized(context);
}

为开发人员提供友好的扩展方法，用来注册中间件

/// <summary>
/// 注册授权服务-step1
/// </summary>
/// <param name="services">The <see cref="IServiceCollection"/> for adding services.</param>
/// <param name="configureOptions">A delegate to configure the <see cref="ResponseCompressionOptions"/>.</param>
/// <returns></returns>
public static IServiceCollection AddLindAuthrization(this IServiceCollection services, Action<AuthorizationConfig> configureOptions = null)
{
if (services == null)
{
throw new ArgumentNullException(nameof(services));
}
var options = new AuthorizationConfig();
configureOptions?.Invoke(options);
ObjectMapper.MapperTo(options, ConfigFileHelper.Get<AuthorizationConfig>());
services.AddSingleton(options);
return services;
}

/// <summary>
/// 使用授权中间件-step2
/// </summary>
/// <param name="builder"></param>
/// <param name="options"></param>
/// <returns></returns>
public static IApplicationBuilder UseLindAuthrization(this IApplicationBuilder builder)
{
if (builder == null)
{
throw new ArgumentNullException(nameof(builder));
}
var options = builder.ApplicationServices.GetService<AuthorizationConfig>();
return builder.UseMiddleware<AuthorizationMiddleware>(options);
}

使用授权中间件Startup中注册

// 注册服务
services.AddLindAuthrization(options =>
{
options.EncryptKey = "abc123";
options.ExpiredSecond = 50;
options.AppList = new string[] { "1", "2", "3" };
});
// 注册中间件　
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseLindAuthrization();
app.UseMvc();
}

请求链跟踪中间件

记录请求经过的整个过程，对于多api相互调用的场景比较有用

响应时间中间件

记录大于指定时间的请求信息，方便做性能整体的提升

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