c# - HttpUtility.ParseQueryString 缺少一些字符

Question

我正在尝试提取带有 + 特殊字符的电子邮件，但由于某种原因 ParseQueryString 跳过它:

namespace ParsingProblem
    {
        class Program
        {
            static void Main(string[] args)
            {        
                var uri = new System.Uri("callback://gmailauth/#email=mypersonalemail15+1@gmail.com");
                var parsed = System.Web.HttpUtility.ParseQueryString(uri.Fragment);
                var email = parsed["#email"];
                // Email is: mypersonalemail15 1@gmail.com and it should be mypersonalemail15+1@gmail.com
            }
        }
    }

Answer 1

URL 中的 + 符号被解释为空格字符。要解决此问题，您需要先对电子邮件地址进行 URL 编码。例如:

var urlEncodedEmail = System.Web.HttpUtility.UrlEncode("mypersonalemail15+1@gmail.com");
var uri = new System.Uri($"callback://gmailauth/#email={urlEncodedEmail}");
var parsed = System.Web.HttpUtility.ParseQueryString(uri.Fragment);
var email = parsed["#email"];