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using System.Security.Claims;
using Dpz.Core.WebApi.MessagePackFormatters;
using MessagePack.Resolvers;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Microsoft.Extensions.Options;
#pragma warning disable CS0162
namespace Dpz.Core.WebApi;
/// <summary>
/// Tools Extensions
/// </summary>
public static class ToolsExtensions
{
/// <summary>
/// 生成翻页元数据
/// </summary>
/// <param name="pagedList"></param>
/// <param name="header"></param>
/// <returns></returns>
public static void AddPaginationMetadata(this IPagedList pagedList, IHeaderDictionary header)
{
var paginationMetadata = new
{
currentPage = pagedList.CurrentPageIndex,
totalCount = pagedList.TotalItemCount,
pageSize = pagedList.PageSize,
totalPages = pagedList.TotalPageCount,
startItemIndex = pagedList.StartItemIndex,
endItemIndex = pagedList.EndItemIndex,
};
var json = JsonSerializer.Serialize(paginationMetadata);
header.Append("X-Pagination", json);
}
/// <summary>
/// 使用Response header中间件
/// </summary>
/// <param name="builder"></param>
/// <returns></returns>
public static IApplicationBuilder UseResponseHeaders(this IApplicationBuilder builder)
{
return builder.UseMiddleware<HttpResponseHeaderHandel>();
}
/// <summary>
/// 请求记录中间件
/// </summary>
/// <param name="builder"></param>
/// <returns></returns>
public static IApplicationBuilder UseRequestRecord(this IApplicationBuilder builder)
{
return builder.UseMiddleware<HttpRequestRecord>();
}
/// <summary>
/// 日期格式化中间件
/// </summary>
/// <param name="builder"></param>
/// <returns></returns>
public static IApplicationBuilder UseDateTimeLocalFormat(this IApplicationBuilder builder)
{
return builder.UseMiddleware<DateTimeFormattingMiddleware>();
}
/// <summary>
/// 图像类型
/// </summary>
public static string[] PictureTypes =>
typeof(PictureType)
.GetFields()
.Where(x => x.IsPublic && x.IsStatic)
.Select(x => x.Name)
.ToArray();
/// <summary>
///
/// </summary>
/// <param name="objectStorageService"></param>
/// <param name="music"></param>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="ArgumentException"></exception>
public static async Task DeleteMusicAsync(
this IObjectStorageOperation objectStorageService,
VmMusic music
)
{
if (music == null)
throw new ArgumentNullException(nameof(music));
if (string.IsNullOrEmpty(music.MusicUrl))
throw new ArgumentException(
"property MusicUrl is empty or null",
nameof(music.MusicUrl)
);
await objectStorageService.DeleteAsync(music.MusicUrl);
if (!string.IsNullOrEmpty(music.CoverUrl))
await objectStorageService.DeleteAsync(music.CoverUrl);
if (!string.IsNullOrEmpty(music.LyricUrl))
await objectStorageService.DeleteAsync(music.LyricUrl);
}
#nullable enable
/// <summary>
///
/// </summary>
/// <param name="builder"></param>
/// <param name="setup"></param>
/// <returns></returns>
public static IMvcBuilder AddMessagePackSerializerFormatters(
this IMvcBuilder builder,
Action<MessagePackFormatterOptions>? setup = null
)
{
builder.Services.Configure<MessagePackFormatterOptions>(o =>
{
if (o.FormatterResolver == null)
o.FormatterResolver = ContractlessStandardResolver.Instance;
setup?.Invoke(o);
});
builder.Services.TryAddEnumerable(
ServiceDescriptor.Transient<
IConfigureOptions<MvcOptions>,
MessagePackFormatterMvcOptionsSetup
>()
);
return builder;
}
#nullable restore
}
上述代码是一个 C# 类库的扩展方法集合,主要用于 ASP.NET Core Web API 项目中。以下是对代码中各个部分的详细解释:
GetIdentity 方法ClaimsPrincipal 对象中提取当前用户的信息,并将其映射到 VmUserInfo 对象。VmUserInfo 的相应属性中。DateTime?、Sex、bool? 和 Permissions?。AddPaginationMetadata 方法IPagedList 对象和一个 IHeaderDictionary 对象。X-Pagination。UseResponseHeaders: 注册一个中间件,用于处理 HTTP 响应头。UseRequestRecord: 注册一个中间件,用于记录 HTTP 请求。UseDateTimeLocalFormat: 注册一个中间件,用于处理日期时间格式化。PictureTypes 属性PictureType 枚举中所有公共静态字段的名称,返回一个字符串数组。GetIpAddress 方法X-Forwarded-For 字段,如果存在则返回该值,否则返回连接的远程 IP 地址。DeleteMusicAsync 方法VmMusic 对象是否为 null,及其 MusicUrl 是否为空。IObjectStorageOperation 接口的 DeleteAsync 方法删除音乐 URL、封面 URL 和歌词 URL。AddMessagePackSerializerFormatters 方法MessagePackFormatterOptions,如果未指定格式化程序解析器,则使用默认的 ContractlessStandardResolver。MessagePackFormatterMvcOptionsSetup 注册为服务。这个类库提供了一系列扩展方法,旨在简化 ASP.NET Core Web API 的开发,处理用户身份、分页、请求记录、IP 地址获取、资源删除和序列化等常见任务。通过这些扩展方法,开发人员可以更方便地实现功能,提高代码的可读性和可维护性。
