using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Net; using System.Security.Cryptography; using System.Text; using System.Text.RegularExpressions; namespace TinyTwitter { public class OAuthInfo { public string ConsumerKey { get; set; } public string ConsumerSecret { get; set; } public string AccessToken { get; set; } public string AccessSecret { get; set; } } public class Tweet { public long Id { get; set; } public DateTime CreatedAt { get; set; } public string UserName { get; set; } public string ScreenName { get; set; } public string Text { get; set; } } public class TinyTwitter { private readonly OAuthInfo oauth; public TinyTwitter(OAuthInfo oauth) { this.oauth = oauth; } public void UpdateStatus(string message) { new RequestBuilder(oauth, "POST", "https://api.twitter.com/1.1/statuses/update.json") .AddParameter("status", message) .Execute(); } /** * * As of June 26th 2015 Direct Messaging is not part of TinyTwitter. * I have added it to Lidarr's copy to make our implementation easier * and added this banner so it's not blindly updated. * **/ public void DirectMessage(string message, string screenName) { new RequestBuilder(oauth, "POST", "https://api.twitter.com/1.1/direct_messages/new.json") .AddParameter("text", message) .AddParameter("screen_name", screenName) .Execute(); } #region RequestBuilder public class RequestBuilder { private const string VERSION = "1.0"; private const string SIGNATURE_METHOD = "HMAC-SHA1"; private readonly OAuthInfo oauth; private readonly string method; private readonly IDictionary customParameters; private readonly string url; public RequestBuilder(OAuthInfo oauth, string method, string url) { this.oauth = oauth; this.method = method; this.url = url; customParameters = new Dictionary(); } public RequestBuilder AddParameter(string name, string value) { customParameters.Add(name, value.EncodeRFC3986()); return this; } public string Execute() { var timespan = GetTimestamp(); var nonce = CreateNonce(); var parameters = new Dictionary(customParameters); AddOAuthParameters(parameters, timespan, nonce); var signature = GenerateSignature(parameters); var headerValue = GenerateAuthorizationHeaderValue(parameters, signature); var request = (HttpWebRequest)WebRequest.Create(GetRequestUrl()); request.Method = method; request.ContentType = "application/x-www-form-urlencoded"; request.Headers.Add("Authorization", headerValue); WriteRequestBody(request); // It looks like a bug in HttpWebRequest. It throws random TimeoutExceptions // after some requests. Abort the request seems to work. More info: // http://stackoverflow.com/questions/2252762/getrequeststream-throws-timeout-exception-randomly var response = request.GetResponse(); string content; using (var stream = response.GetResponseStream()) { using (var reader = new StreamReader(stream)) { content = reader.ReadToEnd(); } } request.Abort(); return content; } private void WriteRequestBody(HttpWebRequest request) { if (method == "GET") return; var requestBody = Encoding.ASCII.GetBytes(GetCustomParametersString()); using (var stream = request.GetRequestStream()) stream.Write(requestBody, 0, requestBody.Length); } private string GetRequestUrl() { if (method != "GET" || customParameters.Count == 0) return url; return string.Format("{0}?{1}", url, GetCustomParametersString()); } private string GetCustomParametersString() { return customParameters.Select(x => string.Format("{0}={1}", x.Key, x.Value)).Join("&"); } private string GenerateAuthorizationHeaderValue(IEnumerable> parameters, string signature) { return new StringBuilder("OAuth ") .Append(parameters.Concat(new KeyValuePair("oauth_signature", signature)) .Where(x => x.Key.StartsWith("oauth_")) .Select(x => string.Format("{0}=\"{1}\"", x.Key, x.Value.EncodeRFC3986())) .Join(",")) .ToString(); } private string GenerateSignature(IEnumerable> parameters) { var dataToSign = new StringBuilder() .Append(method).Append("&") .Append(url.EncodeRFC3986()).Append("&") .Append(parameters .OrderBy(x => x.Key) .Select(x => string.Format("{0}={1}", x.Key, x.Value)) .Join("&") .EncodeRFC3986()); var signatureKey = string.Format("{0}&{1}", oauth.ConsumerSecret.EncodeRFC3986(), oauth.AccessSecret.EncodeRFC3986()); var sha1 = new HMACSHA1(Encoding.ASCII.GetBytes(signatureKey)); var signatureBytes = sha1.ComputeHash(Encoding.ASCII.GetBytes(dataToSign.ToString())); return Convert.ToBase64String(signatureBytes); } private void AddOAuthParameters(IDictionary parameters, string timestamp, string nonce) { parameters.Add("oauth_version", VERSION); parameters.Add("oauth_consumer_key", oauth.ConsumerKey); parameters.Add("oauth_nonce", nonce); parameters.Add("oauth_signature_method", SIGNATURE_METHOD); parameters.Add("oauth_timestamp", timestamp); parameters.Add("oauth_token", oauth.AccessToken); } private static string GetTimestamp() { return ((int)(DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalSeconds).ToString(); } private static string CreateNonce() { return new Random().Next(0x0000000, 0x7fffffff).ToString("X8"); } } #endregion } public static class TinyTwitterHelperExtensions { public static string Join(this IEnumerable items, string separator) { return string.Join(separator, items.ToArray()); } public static IEnumerable Concat(this IEnumerable items, T value) { return items.Concat(new[] { value }); } public static string EncodeRFC3986(this string value) { // From Twitterizer http://www.twitterizer.net/ if (string.IsNullOrEmpty(value)) return string.Empty; var encoded = Uri.EscapeDataString(value); return Regex .Replace(encoded, "(%[0-9a-f][0-9a-f])", c => c.Value.ToUpper()) .Replace("(", "%28") .Replace(")", "%29") .Replace("$", "%24") .Replace("!", "%21") .Replace("*", "%2A") .Replace("'", "%27") .Replace("%7E", "~"); } } }