RestSharp is best used as the foundation for a proxy class for your specific API. Instead of using RestClient directly throughout your application, create a dedicated API client class and an interface. This provides isolation between different RestClient instances (which may require different settings) and makes your code more testable.
To implement a typed client, follow these steps:
- Define an Interface: Create an interface representing the API functions (e.g.,
ITwitterClient). - Define Data Models: Create DTOs (Data Transfer Objects) using
class or record to represent request and response bodies. - Implement the Client: Create a class that wraps a
RestClient instance, pre-configured with the API's base URI and necessary authenticators.
public interface ITwitterClient {
Task<TwitterUser> GetUser(string user);
}
public record TwitterUser(string Id, string Name, string Username);
public class TwitterClient : ITwitterClient, IDisposable {
readonly RestClient _client;
public TwitterClient(string apiKey, string apiKeySecret) {
var tokenRequest = new OAuth2TokenRequest(
"https://api.twitter.com/oauth2/token",
apiKey,
apiKeySecret
);
var options = new RestClientOptions("https://api.twitter.com/2") {
Authenticator = new OAuth2ClientCredentialsAuthenticator(tokenRequest)
};
_client = new RestClient(options);
}
public async Task<TwitterUser> GetUser(string user) {
var response = await _client.GetAsync<TwitterSingleObject<TwitterUser>>(
"users/by/username/{user}",
new { user }
);
return response!.Data;
}
record TwitterSingleObject<T>(T Data);
public void Dispose() {
_client?.Dispose();
GC.SuppressFinalize(this);
}
}
