using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Http.Extensions;
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using System;
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using System.Collections.Generic;
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using System.IdentityModel.Tokens.Jwt;
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using System.Linq;
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using System.Security.Claims;
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using System.Text;
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using System.Threading.Tasks;
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using WIDESEA_Core.Helper;
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namespace WIDESEA_Core.Extensions
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{
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public static class SwaggerContextExtension
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{
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public const string SwaggerCodeKey = "swagger-code";
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public const string SwaggerJwt = "swagger-jwt";
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/// <summary>
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/// 检查当前Swagger请求是否验证成功
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/// </summary>
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/// <returns>如果Session中Swagger验证码为"success"则返回true，否则返回false</returns>
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public static bool IsSuccessSwagger()
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{
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return App.HttpContext?.GetSession()?.GetString(SwaggerCodeKey) == "success";
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}
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/// <summary>
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/// 判断当前Swagger请求是否已通过验证
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/// </summary>
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/// <param name="context">Http上下文对象</param>
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/// <returns>如果Swagger验证成功返回true，否则返回false</returns>
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public static bool IsSuccessSwagger(this HttpContext context)
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{
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return context.GetSession()?.GetString(SwaggerCodeKey) == "success";
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}
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/// <summary>
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/// 设置Swagger验证成功状态
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/// </summary>
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/// <remarks>
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/// 将Swagger验证状态码"success"存储到当前会话中
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/// </remarks>
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public static void SuccessSwagger()
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{
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App.HttpContext?.GetSession()?.SetString(SwaggerCodeKey, "success");
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}
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/// <summary>
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/// 设置Swagger操作成功的状态码
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/// </summary>
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/// <param name="context">Http上下文对象</param>
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public static void SuccessSwagger(this HttpContext context)
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{
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context.GetSession()?.SetString(SwaggerCodeKey, "success");
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}
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/// <summary>
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/// 为Swagger JWT认证设置成功上下文
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/// </summary>
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/// <param name="context">Http上下文对象</param>
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/// <param name="token">JWT令牌</param>
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/// <remarks>
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/// 将JWT令牌解析为ClaimsIdentity并添加到用户身份中，同时将令牌存储在会话中
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/// </remarks>
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public static void SuccessSwaggerJwt(this HttpContext context, string token)
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{
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var claims = new ClaimsIdentity(GetClaimsIdentity(token));
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context.User.AddIdentity(claims);
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context.GetSession().SetString(SwaggerJwt, token);
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}
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/// <summary>
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/// 从JWT令牌中获取声明(Claims)集合
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/// </summary>
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/// <param name="token">JWT令牌字符串</param>
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/// <returns>包含声明信息的集合，若令牌无效则返回空集合</returns>
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private static IEnumerable<Claim> GetClaimsIdentity(string token)
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{
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var jwtHandler = new JwtSecurityTokenHandler();
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// token校验
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if (token.IsNotEmptyOrNull() && jwtHandler.CanReadToken(token))
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{
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var jwtToken = jwtHandler.ReadJwtToken(token);
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return jwtToken.Claims;
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}
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return new List<Claim>();
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}
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/// <summary>
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/// 从当前HTTP上下文中获取成功的Swagger JWT令牌
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/// </summary>
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/// <param name="context">HTTP上下文</param>
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/// <returns>Swagger JWT令牌字符串</returns>
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public static string GetSuccessSwaggerJwt(this HttpContext context)
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{
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return context.GetSession().GetString(SwaggerJwt);
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}
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/// <summary>
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/// 重定向到Swagger登录页面
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/// </summary>
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/// <param name="context">Http上下文对象</param>
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/// <remarks>
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/// 将当前请求重定向到/swg-login.html页面，并附带当前URL作为返回地址参数
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/// </remarks>
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public static void RedirectSwaggerLogin(this HttpContext context)
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{
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var returnUrl = context.Request.GetDisplayUrl(); //获取当前url地址
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context.Response.Redirect("/swg-login.html?returnUrl=" + returnUrl);
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}
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}
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}
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