C# class library HttpRequest June 26, 2020

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Http.Extensions;
using System;
using System.Text.RegularExpressions;

namespace Core.Util
{
    /// <summary>
    ///Expand the class
    /// </summary>
    public static partial class Extention
    {
        /// <summary>
        ///Determine whether it is an AJAX request
        /// </summary>
        /// <param name="req"></param>
        /// <returns></returns>
        public static bool IsAjaxRequest(this HttpRequest req)
        {
            bool result = false;

            var xreq = req.Headers.ContainsKey("x-requested-with");
            if (xreq)
            {
                result = req.Headers["x-requested-with"] = ="XMLHttpRequest";
            }

            return result;
        }

        /// <summary>
        ///Gets the Url to remove query parameters
        /// </summary>
        /// <param name="req">request</param>
        /// <returns></returns>
        public static string GetDisplayUrlNoQuery(this HttpRequest req)
        {
            var queryStr = req.QueryString.ToString();
            var displayUrl = req.GetDisplayUrl();

            return queryStr.IsNullOrEmpty() ? displayUrl : displayUrl.Replace(queryStr, "");
        }

        /// <summary>
        ///Access Token
        /// </summary>
        /// <param name="req">request</param>
        /// <returns></returns>
        public static string GetToken(this HttpRequest req)
        {
            string tokenHeader = req.Headers["Authorization"].ToString();
            if (tokenHeader.IsNullOrEmpty())
                return null;

            string pattern = "^Bearer (.*?) $";
            if(! Regex.IsMatch(tokenHeader, pattern))throw new Exception("Wrong token format! Format :Bearer {token}");

            string token = Regex.Match(tokenHeader, pattern).Groups[1]? .ToString();if (token.IsNullOrEmpty())
                throw new Exception("Token cannot be empty!");

            return token;
        }

        /// <summary>
        ///Payload of the Token is obtained
        /// </summary>
        /// <param name="req">request</param>
        /// <returns></returns>
        public static JWTPayload GetJWTPayload(this HttpRequest req)
        {
            string token = req.GetToken();
            var payload = JWTHelper.GetPayload<JWTPayload>(token);

            returnpayload; }}}Copy the code