using Microsoft.AspNetCore.Http;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace WIDESEA_Core.Helper
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{
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public static class HttpContextHelper
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{
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/// <summary>
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/// 获取客户端真实IP地址
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/// </summary>
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/// <param name="context">Http上下文对象</param>
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/// <returns>客户端IP地址字符串</returns>
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/// <remarks>
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/// 优先从X-Real-IP和X-Forwarded-For请求头中获取IP地址，
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/// 如果不存在则返回连接远程IP地址
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/// </remarks>
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public static string GetUserIp(this HttpContext context)
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{
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string realIP = null;
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string forwarded = null;
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string remoteIpAddress = context.Connection.RemoteIpAddress.ToString();
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if (context.Request.Headers.ContainsKey("X-Real-IP"))
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{
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realIP = context.Request.Headers["X-Real-IP"].ToString();
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if (realIP != remoteIpAddress)
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{
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remoteIpAddress = realIP;
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}
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}
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if (context.Request.Headers.ContainsKey("X-Forwarded-For"))
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{
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forwarded = context.Request.Headers["X-Forwarded-For"].ToString();
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if (forwarded != remoteIpAddress)
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{
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remoteIpAddress = forwarded;
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}
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}
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return remoteIpAddress;
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}
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}
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}
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