HttpClient returns a result normally, but RestSharp fails to return a result, indicating a bug in RestSharp.

[colindcli]

// .net framework 4.6.2
var url = "https://paldb.cc/cn/Earth_Skill_Fruit%3A_Sand_Tornado";

//use RestSharp(v112.1.0.0) to get the url
var client = new RestClient();
var request = new RestRequest(url);
var response1 = await client.ExecuteAsync(request);
var statusCode1 = response1.StatusCode;
var content1 = response1.Content;

//use HttpClient to get the same url
var response2 = await new HttpClient().GetAsync(url);
var statusCode2 = response2.StatusCode;
var content2 = await response2.Content.ReadAsStringAsync();

Test Environment:

.NET Framework version 4.6.2
RestSharp 112.1.0.0

RestSharp returned NotFound

HttpClient returned OK

Expected behavior

HttpClient returned OK

[alexeyzimarev]

It is not a bug. The accepted content type header is set based on configured serialises. By default, it's JSON and XML. Since your response content type is text/html, the server correctly returns 404 because there's no JSON or XML endpoint at that address.

You can set the client AcceptedContentTypes property to ["text/html"] and it should work.

[alexeyzimarev]

Closing due to lack of feedback.

[colindcli]

Closing due to lack of feedback.

The code has been submitted; you can run it to see the results. The main issue lies in the escape character %3A in the URL address.

RestSharp has a bug regarding URL support for escaped characters in the code.

using RestSharp;
using System.Net.Http;
using System.Threading.Tasks;

namespace ConsoleApp
{
    internal class Program
    {
        static async Task Main(string[] args)
        {
            // .net framework 4.6.2
            var url = "https://paldb.cc/cn/Earth_Skill_Fruit%3A_Sand_Tornado";

            //use RestSharp(v112.1.0.0) to get the url
            var client = new RestClient();
            client.AcceptedContentTypes = new[] { "text/html" };
            var request = new RestRequest(url);
            var response1 = await client.ExecuteAsync(request);
            var statusCode1 = response1.StatusCode;
            var content1 = response1.Content;

            //use HttpClient to get the same url
            var response2 = await new HttpClient().GetAsync(url);
            var statusCode2 = response2.StatusCode;
            var content2 = await response2.Content.ReadAsStringAsync();
        }
    }
}

[alexeyzimarev]

the issue title wasn't pointing to the URl encoding issue

[alexeyzimarev]

I made a quick test and it passes on the last version

[colindcli]

I understand. I tested using different environments.

.NET Framework 4.6.2 test failed

.NET Framework 4.7.2 test succeeded

.NET Framework 4.8 test succeeded

.NET 8 test succeeded

Therefore, only .NET Framework 4.6.2 has the problem.

Thank you for your reply!