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using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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using System.Linq;
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using System.Net;
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using System.Security.Cryptography;
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using System.Text;
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using System.Text.RegularExpressions;
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using System.Web.Script.Serialization;
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namespace TinyTwitter
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{
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public class OAuthInfo
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{
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public string ConsumerKey { get; set; }
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public string ConsumerSecret { get; set; }
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public string AccessToken { get; set; }
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public string AccessSecret { get; set; }
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}
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public class Tweet
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{
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public long Id { get; set; }
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public DateTime CreatedAt { get; set; }
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public string UserName { get; set; }
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public string ScreenName { get; set; }
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public string Text { get; set; }
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}
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public class TinyTwitter
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{
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private readonly OAuthInfo oauth;
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public TinyTwitter(OAuthInfo oauth)
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{
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this.oauth = oauth;
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}
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public void UpdateStatus(string message)
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{
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new RequestBuilder(oauth, "POST", "https://api.twitter.com/1.1/statuses/update.json")
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.AddParameter("status", message)
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.Execute();
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}
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/**
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*
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* As of June 26th 2015 Direct Messaging is not part of TinyTwitter.
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* I have added it to Sonarr's copy to make our implementation easier
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* and added this banner so it's not blindly updated.
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*
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**/
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public void DirectMessage(string message, string screenName)
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{
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new RequestBuilder(oauth, "POST", "https://api.twitter.com/1.1/direct_messages/new.json")
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.AddParameter("text", message)
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.AddParameter("screen_name", screenName)
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.Execute();
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}
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public IEnumerable<Tweet> GetHomeTimeline(long? sinceId = null, long? maxId = null, int? count = 20)
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{
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return GetTimeline("https://api.twitter.com/1.1/statuses/home_timeline.json", sinceId, maxId, count, "");
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}
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public IEnumerable<Tweet> GetMentions(long? sinceId = null, long? maxId = null, int? count = 20)
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{
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return GetTimeline("https://api.twitter.com/1.1/statuses/mentions.json", sinceId, maxId, count, "");
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}
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public IEnumerable<Tweet> GetUserTimeline(long? sinceId = null, long? maxId = null, int? count = 20, string screenName = "")
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{
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return GetTimeline("https://api.twitter.com/1.1/statuses/user_timeline.json", sinceId, maxId, count, screenName);
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}
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private IEnumerable<Tweet> GetTimeline(string url, long? sinceId, long? maxId, int? count, string screenName)
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{
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var builder = new RequestBuilder(oauth, "GET", url);
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if (sinceId.HasValue)
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builder.AddParameter("since_id", sinceId.Value.ToString());
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if (maxId.HasValue)
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builder.AddParameter("max_id", maxId.Value.ToString());
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if (count.HasValue)
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builder.AddParameter("count", count.Value.ToString());
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if (screenName != "")
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builder.AddParameter("screen_name", screenName);
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var responseContent = builder.Execute();
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var serializer = new JavaScriptSerializer();
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var tweets = (object[])serializer.DeserializeObject(responseContent);
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return tweets.Cast<Dictionary<string, object>>().Select(tweet =>
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{
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var user = ((Dictionary<string, object>)tweet["user"]);
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var date = DateTime.ParseExact(tweet["created_at"].ToString(),
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"ddd MMM dd HH:mm:ss zz00 yyyy",
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CultureInfo.InvariantCulture).ToLocalTime();
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return new Tweet
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{
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Id = (long)tweet["id"],
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CreatedAt = date,
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Text = (string)tweet["text"],
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UserName = (string)user["name"],
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ScreenName = (string)user["screen_name"]
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};
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}).ToArray();
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}
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#region RequestBuilder
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public class RequestBuilder
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{
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private const string VERSION = "1.0";
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private const string SIGNATURE_METHOD = "HMAC-SHA1";
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private readonly OAuthInfo oauth;
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private readonly string method;
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private readonly IDictionary<string, string> customParameters;
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private readonly string url;
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public RequestBuilder(OAuthInfo oauth, string method, string url)
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{
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this.oauth = oauth;
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this.method = method;
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this.url = url;
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customParameters = new Dictionary<string, string>();
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}
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public RequestBuilder AddParameter(string name, string value)
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{
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customParameters.Add(name, value.EncodeRFC3986());
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return this;
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}
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public string Execute()
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{
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var timespan = GetTimestamp();
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var nonce = CreateNonce();
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var parameters = new Dictionary<string, string>(customParameters);
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AddOAuthParameters(parameters, timespan, nonce);
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var signature = GenerateSignature(parameters);
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var headerValue = GenerateAuthorizationHeaderValue(parameters, signature);
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var request = (HttpWebRequest)WebRequest.Create(GetRequestUrl());
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request.Method = method;
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request.ContentType = "application/x-www-form-urlencoded";
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request.Headers.Add("Authorization", headerValue);
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WriteRequestBody(request);
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// It looks like a bug in HttpWebRequest. It throws random TimeoutExceptions
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// after some requests. Abort the request seems to work. More info:
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// http://stackoverflow.com/questions/2252762/getrequeststream-throws-timeout-exception-randomly
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var response = request.GetResponse();
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string content;
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using (var stream = response.GetResponseStream())
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{
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using (var reader = new StreamReader(stream))
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{
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content = reader.ReadToEnd();
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}
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}
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request.Abort();
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return content;
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}
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private void WriteRequestBody(HttpWebRequest request)
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{
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if (method == "GET")
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return;
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var requestBody = Encoding.ASCII.GetBytes(GetCustomParametersString());
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using (var stream = request.GetRequestStream())
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stream.Write(requestBody, 0, requestBody.Length);
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}
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private string GetRequestUrl()
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{
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if (method != "GET" || customParameters.Count == 0)
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return url;
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return string.Format("{0}?{1}", url, GetCustomParametersString());
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}
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private string GetCustomParametersString()
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{
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return customParameters.Select(x => string.Format("{0}={1}", x.Key, x.Value)).Join("&");
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}
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private string GenerateAuthorizationHeaderValue(IEnumerable<KeyValuePair<string, string>> parameters, string signature)
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{
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return new StringBuilder("OAuth ")
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.Append(parameters.Concat(new KeyValuePair<string, string>("oauth_signature", signature))
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.Where(x => x.Key.StartsWith("oauth_"))
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.Select(x => string.Format("{0}=\"{1}\"", x.Key, x.Value.EncodeRFC3986()))
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.Join(","))
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.ToString();
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}
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private string GenerateSignature(IEnumerable<KeyValuePair<string, string>> parameters)
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{
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var dataToSign = new StringBuilder()
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.Append(method).Append("&")
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.Append(url.EncodeRFC3986()).Append("&")
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.Append(parameters
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.OrderBy(x => x.Key)
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.Select(x => string.Format("{0}={1}", x.Key, x.Value))
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.Join("&")
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.EncodeRFC3986());
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var signatureKey = string.Format("{0}&{1}", oauth.ConsumerSecret.EncodeRFC3986(), oauth.AccessSecret.EncodeRFC3986());
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var sha1 = new HMACSHA1(Encoding.ASCII.GetBytes(signatureKey));
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var signatureBytes = sha1.ComputeHash(Encoding.ASCII.GetBytes(dataToSign.ToString()));
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return Convert.ToBase64String(signatureBytes);
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}
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private void AddOAuthParameters(IDictionary<string, string> parameters, string timestamp, string nonce)
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{
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parameters.Add("oauth_version", VERSION);
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parameters.Add("oauth_consumer_key", oauth.ConsumerKey);
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parameters.Add("oauth_nonce", nonce);
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parameters.Add("oauth_signature_method", SIGNATURE_METHOD);
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parameters.Add("oauth_timestamp", timestamp);
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parameters.Add("oauth_token", oauth.AccessToken);
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}
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private static string GetTimestamp()
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{
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return ((int)(DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalSeconds).ToString();
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}
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private static string CreateNonce()
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{
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return new Random().Next(0x0000000, 0x7fffffff).ToString("X8");
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}
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}
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#endregion
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}
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public static class TinyTwitterHelperExtensions
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{
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public static string Join<T>(this IEnumerable<T> items, string separator)
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{
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return string.Join(separator, items.ToArray());
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}
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public static IEnumerable<T> Concat<T>(this IEnumerable<T> items, T value)
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{
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return items.Concat(new[] { value });
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}
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public static string EncodeRFC3986(this string value)
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{
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// From Twitterizer http://www.twitterizer.net/
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if (string.IsNullOrEmpty(value))
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return string.Empty;
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var encoded = Uri.EscapeDataString(value);
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return Regex
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.Replace(encoded, "(%[0-9a-f][0-9a-f])", c => c.Value.ToUpper())
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.Replace("(", "%28")
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.Replace(")", "%29")
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.Replace("$", "%24")
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.Replace("!", "%21")
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.Replace("*", "%2A")
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.Replace("'", "%27")
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.Replace("%7E", "~");
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}
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}
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}
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Mark McDowall
10 years ago