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using System.Text.Json.Serialization; | |
using RestSharp.Authenticators; | |
namespace RestSharp.Tests.External.Twitter; | |
public interface ITwitterClient { | |
Task<TwitterUser> GetUser(string user); | |
} | |
public class TwitterClient : ITwitterClient, IDisposable { | |
readonly RestClient _client; | |
public TwitterClient(string apiKey, string apiKeySecret) { | |
var options = new RestClientOptions("https://api.twitter.com/2"); | |
_client = new RestClient(options) { | |
Authenticator = new TwitterAuthenticator("https://api.twitter.com", apiKey, apiKeySecret) | |
}; | |
} | |
public async Task<TwitterUser> GetUser(string user) { | |
var response = await _client.GetJsonAsync<TwitterSingleObject<TwitterUser>>( | |
"users/by/username/{user}", | |
new { user } | |
); | |
return response!.Data; | |
} | |
record TwitterSingleObject<T>(T Data); | |
public void Dispose() { | |
_client?.Dispose(); | |
GC.SuppressFinalize(this); | |
} | |
} | |
public class TwitterAuthenticator : AuthenticatorBase { | |
readonly string _baseUrl; | |
readonly string _clientId; | |
readonly string _clientSecret; | |
public TwitterAuthenticator(string baseUrl, string clientId, string clientSecret) : base("") { | |
_baseUrl = baseUrl; | |
_clientId = clientId; | |
_clientSecret = clientSecret; | |
} | |
protected override async ValueTask<Parameter> GetAuthenticationParameter(string accessToken) { | |
var token = string.IsNullOrEmpty(Token) ? await GetToken() : Token; | |
return new HeaderParameter(KnownHeaders.Authorization, token); | |
} | |
async Task<string> GetToken() { | |
var options = new RestClientOptions(_baseUrl); | |
using var client = new RestClient(options) { | |
Authenticator = new HttpBasicAuthenticator(_clientId, _clientSecret), | |
}; | |
var request = new RestRequest("oauth2/token") | |
.AddParameter("grant_type", "client_credentials"); | |
var response = await client.PostAsync<TokenResponse>(request); | |
return $"{response!.TokenType} {response!.AccessToken}"; | |
} | |
record TokenResponse { | |
[JsonPropertyName("token_type")] | |
public string TokenType { get; init; } | |
[JsonPropertyName("access_token")] | |
public string AccessToken { get; init; } | |
} | |
} | |
public record TwitterUser(string Id, string Name, string Username); |
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