1、前言

为什么我们要隐藏部分接口？

因为我们在用 swagger 代替接口的时候，难免有些接口会直观的暴露出来，比如我们结合 Consul 一起使用的时候，会将健康检查接口以及报警通知接口暴露出来，这些接口有时候会出于方便考虑，没有进行加密，这个时候我们就需要把接口隐藏起来，只有内部的开发者知道。

为什么要分组？

通常当我们写前后端分离的项目的时候，难免会遇到编写很多接口供前端页面进行调用，当接口达到几百个的时候就需要区分哪些是框架接口，哪些是业务接口，这时候给 swaggerUI 的接口分组是个不错的选择。

Asp.Net Core WebAPI 使用 Swagger 时 API 隐藏与分组

swagger 的基本使用这里将不再赘述，可以阅读微软官方文档，即可基本使用

2、swaggerUI 中加入授权请求

新建 HttpHeaderOperationFilter 操作过滤器，继承 Swashbuckle.AspNetCore.SwaggerGen.IOperationFilter 接口，实现 Apply 方法
/// <summary>
/// swagger 请求头
/// </summary>
public class HttpHeaderOperationFilter : IOperationFilter
{
public void Apply(Operation operation, OperationFilterContext context)
{
#region 新方法
if (operation.Parameters == null)
{
operation.Parameters = new List<IParameter>();
}

if (context.ApiDescription.TryGetMethodInfo(out MethodInfo methodInfo))
{
if (!methodInfo.CustomAttributes.Any(t => t.AttributeType == typeof(AllowAnonymousAttribute))
&&!(methodInfo.ReflectedType.CustomAttributes.Any(t => t.AttributeType == typeof(AuthorizeAttribute))))
{
operation.Parameters.Add(new NonBodyParameter
{
Name = “Authorization”,
In = “header”,
Type = “string”,
Required = true,
Description = “请输入 Token，格式为 bearer XXX”
});
}
}
#endregion

#region 已过时
//if (operation.Parameters == null)
//{
// operation.Parameters = new List<IParameter>();
//}
//var actionAttrs = context.ApiDescription.ActionAttributes().ToList();
//var isAuthorized = actionAttrs.Any(a => a.GetType() == typeof(AuthorizeAttribute));
//if (isAuthorized == false)
//{
// var controllerAttrs = context.ApiDescription.ControllerAttributes();
// isAuthorized = controllerAttrs.Any(a => a.GetType() == typeof(AuthorizeAttribute));
//}
//var isAllowAnonymous = actionAttrs.Any(a => a.GetType() == typeof(AllowAnonymousAttribute));
//if (isAuthorized && isAllowAnonymous == false)
//{
// operation.Parameters.Add(new NonBodyParameter
// {
// Name = “Authorization”,
// In = “header”,
// Type = “string”,
// Required = true,
// Description = “请输入 Token，格式为 bearer XXX”
// });
//}
#endregion
}
}

然后修改 Startup.cs 中的 ConfigureServices 方法，添加我们自定义的 HttpHeaderOperationFilter 过滤器

public IServiceProvider ConfigureServices(IServiceCollection services)
{
    ...
    services.AddSwaggerGen(c =>
    {
        ...
c.OperationFilter<HttpHeaderOperationFilter>();
  });
    ...
}

这时候我们再访问 swaggerUI 就可以输入 Token 了
Asp.Net Core WebAPI 使用 Swagger 时 API 隐藏与分组

3、API 分组

修改 Startup.cs 中的 ConfigureServices 方法，添加多个 swagger 文档

public IServiceProvider ConfigureServices(IServiceCollection services)
{
 ...
    services.AddSwaggerGen(c =>
    {
        c.SwaggerDoc("v1", new Info
        {
            Version = "v1",
            Title = "接口文档",
            Description =  "接口文档-基础",
            TermsOfService = "",
            Contact = new Contact
            {
                Name = "XXX1111",
                Email = "XXX1111@qq.com",
                Url = ""
            }
        });

        c.SwaggerDoc("v2", new Info
        {
            Version = "v2",
            Title = "接口文档",
            Description =  "接口文档-基础",
            TermsOfService = "",
            Contact = new Contact
            {
                Name = "XXX2222",
                Email = "XXX2222@qq.com",
                Url = ""
            }
        });

        //反射注入全部程序集说明
        GetAllAssemblies().Where(t => t.CodeBase.EndsWith("Controller.dll")).ToList().ForEach(assembly =>
            {
                c.IncludeXmlComments(assembly.CodeBase.Replace(".dll", ".xml"));
            });

        c.OperationFilter<HttpHeaderOperationFilter>();
        //c.DocumentFilter<HiddenApiFilter>();
    });
    ...
}

修改 Startup.cs 中的 Configure 方法，加入

public void Configure(IApplicationBuilder app, ILoggerFactory loggerFactory)
{
    ...
    app.UseSwagger();
    app.UseSwaggerUI(c =>
    {
        c.SwaggerEndpoint("/swagger/v2/swagger.json", "接口文档-基础");//业务接口文档首先显示
        c.SwaggerEndpoint("/swagger/v1/swagger.json", "接口文档-业务");//基础接口文档放后面后显示
        c.RoutePrefix = string.Empty;//设置后直接输入 IP 就可以进入接口文档
    });
    ...

}

然后还要在我们的控制器上面标注 swagger 文档的版本

这时候我们就可以将接口文档进行分组显示了

4、API 隐藏

创建自定义隐藏特性 HiddenApiAttribute.cs

/// <summary>
/// 隐藏 swagger 接口特性标识
/// </summary>
[AttributeUsage(AttributeTargets.Method | AttributeTargets.Class)]
public class HiddenApiAttribute:System.Attribute
{
}

创建 API 隐藏过滤器 HiddenApiFilter 继承 Swashbuckle.AspNetCore.SwaggerGen.IDocumentFilter 接口，实现 Apply 方法

/// <summary>
/// 自定义 Swagger 隐藏过滤器
/// </summary>
public class HiddenApiFilter : IDocumentFilter
{
    public void Apply(SwaggerDocument swaggerDoc, DocumentFilterContext context)
    {
        foreach (ApiDescription apiDescription in context.ApiDescriptions)
        {
            if (apiDescription.TryGetMethodInfo(out MethodInfo method))
            {
                if (method.ReflectedType.CustomAttributes.Any(t=>t.AttributeType==typeof(HiddenApiAttribute))
|| method.CustomAttributes.Any(t => t.AttributeType == typeof(HiddenApiAttribute)))
                {
                    string key = "/" + apiDescription.RelativePath;
                    if (key.Contains("?"))
                    {
                        int idx = key.IndexOf("?", System.StringComparison.Ordinal);
                        key = key.Substring(0, idx);
                    }
                    swaggerDoc.Paths.Remove(key);
                }
            }
        }
    }
}

在 Startup.cs 中使用 HiddenApiFilter

public IServiceProvider ConfigureServices(IServiceCollection services)
{
    ...
    services.AddSwaggerGen(c =>
    {
        c.SwaggerDoc("v1", new Info
        {
            Version = "v1",
            Title = "接口文档",
            Description =  "接口文档-基础",
            TermsOfService = "",
            Contact = new Contact
            {
                Name = "XXX1111",
                Email = "XXX1111@qq.com",
                Url = ""
            }
        });

        c.SwaggerDoc("v2", new Info
        {
            Version = "v2",
            Title = "接口文档",
            Description =  "接口文档-基础",
            TermsOfService = "",
            Contact = new Contact
            {
                Name = "XXX2222",
                Email = "XXX2222@qq.com",
                Url = ""
            }
        });

        //反射注入全部程序集说明
        GetAllAssemblies().Where(t => t.CodeBase.EndsWith("Controller.dll")
&& !t.CodeBase.Contains("Common.Controller.dll")).ToList().ForEach(assembly =>
            {
                c.IncludeXmlComments(assembly.CodeBase.Replace(".dll", ".xml"));
            });

        c.OperationFilter<HttpHeaderOperationFilter>();
c.DocumentFilter<HiddenApiFilter>();
    });
    ...
}