C# RestSharp 获取请求失败

Question

I'm trying to send GET request using C# RestSharp as follows.

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
var client = new RestClient("https://www.futureelectronics.cn/p/2052120");
client.Timeout = -1;
var request = new RestRequest(Method.GET);
IRestResponse response = client.Execute(request);
Console.WriteLine(response.Content);

this code not working with timeout.

but python same code work well.

import requests

url = "https://www.futureelectronics.cn/p/2052120"

payload={}
headers = {}

response = requests.request("GET", url, headers=headers, data=payload)

print(response.text)

What is the cause of this error? thank you.

Answer 1

I would suggest trying it in a try catch block and seeing if an error is produced in that can shed some light on the reason. And just in case your target refuses to use Tls12 I would also suggest swapping:

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

for:

ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;

One other thing, i have found adding: ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(AcceptAllCertifications);

has also helped me track down issues.

so:

ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(AcceptAllCertifications);
var client = new
RestClient("https://www.futureelectronics.cn/p/2052120");
client.Timeout = -1;
var request = new RestRequest(Method.GET);
try
{
    IRestResponse response = client.Execute(request);
}
catch (Exception ex)
{
    Console.WriteLine("Caught exception : " + ex.message)
}
Console.WriteLine(response.Content);

What does that get you?

Answer 2

Please try to add below line before execute line. It needs TLS12 as i figured out;

System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;