HttpContext擴充套件類

需要引入UAParser，IPTools.Core類庫a
  1 public static partial class HttpContextExtension
{
    /// <summary>
    /// 是否是ajax請求
    /// </summary>
    /// <param name="request"></param>
    /// <returns></returns>
    public static bool IsAjaxRequest(this HttpRequest request)
    {
        if (request == null)
        {
            throw new ArgumentNullException(nameof(request));
        }

        //return request.Headers.ContainsKey("X-Requested-With") &&
        //       request.Headers["X-Requested-With"].Equals("XMLHttpRequest");

        return request.Headers["X-Requested-With"] == "XMLHttpRequest" || request.Headers != null && request.Headers["X-Requested-With"] == "XMLHttpRequest";
    }

    /// <summary>
    /// 獲取客戶端IP
    /// </summary>
    /// <param name="context"></param>
    /// <returns></returns>
    public static string GetClientUserIp(this HttpContext context)
    {
        if (context == null) return "";
        var result = context.Request.Headers["X-Forwarded-For"].FirstOrDefault();
        if (string.IsNullOrEmpty(result))
        {
            result = context.Connection.RemoteIpAddress?.ToString();
        }
        if (string.IsNullOrEmpty(result))
            throw new Exception("獲取IP失敗");

        if (result.Contains("::1"))
            result = "127.0.0.1";

        result = result.Replace("::ffff:", "");
        result = result.Split(':')?.FirstOrDefault() ?? "127.0.0.1";
        result = IsIP(result) ? result : "127.0.0.1";
        return result;
    }

    /// <summary>
    /// 判斷是否IP
    /// </summary>
    /// <param name="ip"></param>
    /// <returns></returns>
    public static bool IsIP(string ip)
    {
        return Regex.IsMatch(ip, @"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$");
    }

    /// <summary>
    /// 獲取登入使用者id
    /// </summary>
    /// <param name="context"></param>
    /// <returns></returns>
    public static long GetUId(this HttpContext context)
    {
        var uid = context.User.FindFirstValue(ClaimTypes.PrimarySid);
        return !string.IsNullOrEmpty(uid) ? long.Parse(uid) : 0;
    }

    /// <summary>
    /// 獲取登入使用者名稱
    /// </summary>
    /// <param name="context"></param>
    /// <returns></returns>
    public static string GetName(this HttpContext context)
    {
        var uid = context.User?.Identity?.Name;

        return uid;
    }

    /// <summary>
    /// 判斷是否是管理員
    /// </summary>
    /// <param name="context"></param>
    /// <returns></returns>
    public static bool IsAdmin(this HttpContext context)
    {
        var userName = context.GetName();
        return userName == GlobalConstant.AdminRole;
    }

    /// <summary>
    /// ClaimsIdentity
    /// </summary>
    /// <param name="context"></param>
    /// <returns></returns>
    public static IEnumerable<ClaimsIdentity> GetClaims(this HttpContext context)
    {
        return context.User?.Identities;
    }
    //public static int GetRole(this HttpContext context)
    //{
    //    var roleid = context.User.FindFirstValue(ClaimTypes.Role) ?? "0";

    //    return int.Parse(roleid);
    //}

    public static string GetUserAgent(this HttpContext context)
    {
        return context.Request.Headers["User-Agent"];
    }

    /// <summary>
    /// 獲取請求令牌
    /// </summary>
    /// <param name="context"></param>
    /// <returns></returns>
    public static string GetToken(this HttpContext context)
    {
        return context.Request.Headers["Authorization"];
    }

    /// <summary>
    /// 獲取請求Url
    /// </summary>
    /// <param name="context"></param>
    /// <returns></returns>
    public static string GetRequestUrl(this HttpContext context)
    {
        return context != null ? context.Request.Path.Value : "";
    }

    /// <summary>
    /// 獲取請求引數
    /// </summary>
    /// <param name="context"></param>
    /// <returns></returns>
    public static string GetQueryString(this HttpContext context)
    {
        return context != null ? context.Request.QueryString.Value : "";
    }

    /// <summary>
    /// 獲取body請求引數
    /// </summary>
    /// <param name="context"></param>
    /// <returns></returns>
    public static string GetBody(this HttpContext context)
    {
        context.Request.EnableBuffering();
        //context.Request.Body.Seek(0, SeekOrigin.Begin);
        //using var reader = new StreamReader(context.Request.Body, Encoding.UTF8);
        ////需要使用非同步方式才能獲取
        //return reader.ReadToEndAsync().Result;
        string body = string.Empty;
        var buffer = new MemoryStream();
        context.Request.Body.Seek(0, SeekOrigin.Begin);
        context.Request.Body.CopyToAsync(buffer);
        buffer.Position = 0;
        try
        {
            using StreamReader streamReader = new(buffer, Encoding.UTF8);
            body = streamReader.ReadToEndAsync().Result;
        }
        finally
        {
            buffer?.Dispose();
        }
        return body;
    }

    /// <summary>
    /// 獲取瀏覽器資訊
    /// </summary>
    /// <param name="context"></param>
    /// <returns></returns>
    public static ClientInfo GetClientInfo(this HttpContext context)
    {
        var str = context.GetUserAgent();
        var uaParser = Parser.GetDefault();
        ClientInfo c = uaParser.Parse(str);

        return c;
    }

    /// <summary>
    /// 根據IP獲取地理位置
    /// </summary>
    /// <returns></returns>
    public static string GetIpInfo(string IP)
    {
        var ipInfo = IpTool.Search(IP);
        return ipInfo?.Province + "-" + ipInfo?.City + "-" + ipInfo?.NetworkOperator;
    }

    /// <summary>
    /// 設定請求引數
    /// </summary>
    /// <param name="reqMethod"></param>
    /// <param name="context"></param>
    public static string GetRequestValue(this HttpContext context, string reqMethod)
    {
        string param = string.Empty;

        if (HttpMethods.IsPost(reqMethod) || HttpMethods.IsPut(reqMethod) || HttpMethods.IsDelete(reqMethod))
        {
            param = context.GetBody();
            string regex = "(?<=\"password\":\")[^\",]*";
            param = Regex.Replace(param, regex, "***");
        }
        if (param.IsEmpty())
        {
            param = context.GetQueryString();
        }
        return param;
    }
}