Query parameters are not fully URL encoding

Question

While using RestSharp (107.3.0) I've encountered a hurdle with it's URL encoding. My code is spread across several classes but looks something like this...

var student = new Student()
{
   Code = "123456",
   Name = "CABEÇA, ANNA",
   CourseCode = "CRS00199",
   Enrolled = "2022-07-27 12:25:57"
};

var clientOptions = new RestClientOptions()
{
   BaseUrl = new Uri("https://myapi")
};

var client = new RestClient(clientOptions);

var request = new RestRequest("student/{c}", Method.Put);
request.AddUrlSegment("c", student.Code);
request.AddQueryParameter("n", student.Name);
request.AddQueryParameter("cc", student.CourseCode);
request.AddQueryParameter("e", student.Enrolled);

var url = client.BuildUri(request);

This is working fine for 99.999% of the students, but for some with non-ASCII characters in their names, like the above (fake) student, the query parameters are not fully encoded within the resulting URL.

https://myapi/student/123456?n=CABEÇA%2c ANNA&cc=CRS00199&e=2022-07-27 12%3a25%3a57

I would expect the Ç in the student's name to be encoded as %c7.

Is there a "better" way to be doing this? Have I missed something obvious? I also see that spaces aren't being encoded, but commas, periods, and colons are.

Many thanks.

--- Update following Magnetron's answer --- In a calling class, I was actually doing a ToString() on the returned Uri.

Thank you! That seems to be it. I hadn't realised that ToString() on a Uri was actually un-encoding some characters. I would have been digging around in RestSharp configurations settings for days. — Ryan Ball
– Ryan Ball, Commented Sep 2, 2022 at 15:49
Yeah, I found that odd too that ToString is a mix of encoded and unencoded. It would make more sense if it was all encoded or all unencoded, maybe it's some sort of backwards compatibility, don't really know. — Magnetron
– Magnetron, Commented Sep 2, 2022 at 16:35

Magnetron · Accepted Answer · 2022-09-02 16:52:30Z

1

It's not about RestSharp but Uri implementation. Use url.AbsoluteUri instead of url.ToString() to get the desired encoded url.

From the ToString documentation:

The unescaped canonical representation of the Uri instance. All characters are unescaped except #, ?, and %.

See also What's the difference between Uri.ToString() and Uri.AbsoluteUri?

edited Sep 2, 2022 at 16:52

answered Sep 2, 2022 at 16:39

Magnetron

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