C#推特请求OAuth令牌

using System;
using System.Net.Http;
using System.Security.Cryptography;
using System.Text;
using System.Web;

class Program
{
    static void Main()
    {
        // 推特API的OAuth相关参数
        string consumerKey = "YourConsumerKey";
        string consumerSecret = "YourConsumerSecret";
        string accessToken = "YourAccessToken";
        string accessTokenSecret = "YourAccessTokenSecret";

        // 请求URL和HTTP方法
        string requestUrl = "https://api.twitter.com/1.1/statuses/update.json";
        string httpMethod = "POST";

        // 生成OAuth签名
        string oauthNonce = Guid.NewGuid().ToString("N");
        string oauthTimestamp = DateTimeOffset.Now.ToUnixTimeSeconds().ToString();
        string oauthSignature = GenerateOAuthSignature(consumerKey, consumerSecret, accessToken, accessTokenSecret, requestUrl, httpMethod, oauthNonce, oauthTimestamp);

        // 构建OAuth头部
        string oauthHeader = GenerateOAuthHeader(consumerKey, accessToken, oauthNonce, oauthSignature, oauthTimestamp);

        // 发送API请求
        HttpClient client = new HttpClient();
        client.DefaultRequestHeaders.Add("Authorization", oauthHeader);
        HttpResponseMessage response = client.PostAsync(requestUrl, new StringContent("status=Hello%20World!", Encoding.UTF8, "application/x-www-form-urlencoded")).Result;

        // 处理API响应
        string responseBody = response.Content.ReadAsStringAsync().Result;
        Console.WriteLine(responseBody);
    }

    static string GenerateOAuthSignature(string consumerKey, string consumerSecret, string accessToken, string accessTokenSecret, string requestUrl, string httpMethod, string oauthNonce, string oauthTimestamp)
    {
        // 构建OAuth参数字符串
        string oauthParameterString = $"oauth_consumer_key={consumerKey}&oauth_nonce={oauthNonce}&oauth_signature_method=HMAC-SHA1&oauth_timestamp={oauthTimestamp}&oauth_token={accessToken}&oauth_version=1.0";

        // 构建HTTP请求参数字符串
        string httpParameterString = "status=Hello%20World!";

        // 构建签名基础字符串
        string baseString = $"{httpMethod}&{Uri.EscapeDataString(requestUrl)}&{Uri.EscapeDataString(oauthParameterString)}&{Uri.EscapeDataString(httpParameterString)}";

        // 计算签名
        string signingKey = $"{Uri.EscapeDataString(consumerSecret)}&{Uri.EscapeDataString(accessTokenSecret)}";
        HMACSHA1 hmacSha1 = new HMACSHA1(Encoding.UTF8.GetBytes(signingKey));
        byte[] signatureBytes = hmacSha1.ComputeHash(Encoding.UTF8.GetBytes(baseString));
        string signature = Convert.ToBase64String(signatureBytes);

        return signature;
    }

    static string GenerateOAuthHeader(string consumerKey, string accessToken, string oauthNonce, string oauthSignature, string oauthTimestamp)
    {
        string oauthHeader = $"OAuth oauth_consumer_key=\"{Uri.EscapeDataString(consumerKey)}\", oauth_nonce=\"{Uri.EscapeDataString(oauthNonce)}\", oauth_signature=\"{Uri.EscapeDataString(oauthSignature)}\", oauth_signature_method=\"HMAC-SHA1\", oauth_timestamp=\"{Uri.EscapeDataString(oauthTimestamp)}\", oauth_token=\"{Uri.EscapeDataString(accessToken)}\", oauth_version=\"1.0\"";
        return oauthHeader;
    }
}