3

I'm trying to extract en email with the + special character but for some reason the ParseQueryString skips it:

namespace ParsingProblem
    {
        class Program
        {
            static void Main(string[] args)
            {        
                var uri = new System.Uri("callback://gmailauth/#[email protected]");
                var parsed = System.Web.HttpUtility.ParseQueryString(uri.Fragment);
                var email = parsed["#email"];
                // Email is: mypersonalemail15 [email protected] and it should be [email protected]
            }
        }
    }
Fritjof Berggren
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  • That is working as expected. If you want to get the raw value (because your caller gave you an invalid value like this one) then manually parse it from `uri.Fragment` . – mjwills Aug 13 '21 at 11:23

1 Answers1

1

The + symbol in a URL is interpreted as a space character. To fix that, you need to URL encode the email address first. For example:

var urlEncodedEmail = System.Web.HttpUtility.UrlEncode("[email protected]");
var uri = new System.Uri($"callback://gmailauth/#email={urlEncodedEmail}");
var parsed = System.Web.HttpUtility.ParseQueryString(uri.Fragment);
var email = parsed["#email"];
DavidG
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  • The problem is that I cannot do that as I only receive the whole uri as you I show before. And in order to access the email I have to parse the uri which would put me in the same problem – Fritjof Berggren Aug 13 '21 at 11:19
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    Then whatever is sending you that URL needs fixing as it is broken. – DavidG Aug 13 '21 at 11:21
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    Another example, an email address can contain `&`, so if the email passed to you was `me&[email protected]`, then the parsing would give you `me` which is even more broken. – DavidG Aug 13 '21 at 11:26
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    And if you are absolutely unable to fix the root of the problem, you are going to have to manually parse the email address out of there by yourself. – DavidG Aug 13 '21 at 11:27