/Code/Channels/Twitter/TwitterWebRequest.cs

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Net;

using System.Text;

using System.Web;

using System.Xml.Linq;

using Inbox2.Platform.Channels.Extensions;

using Inbox2.Platform.Channels.Text;

using Inbox2.Platform.Framework.OAuth;



namespace Inbox2.Channels.Twitter

{

	public class TwitterWebRequest

	{

		public static string Put(Uri sourceUri, string data, string consumerKey, string consumerSecret, string token, string tokenSecret)

		{

			HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(sourceUri);

			request.Method = "PUT";

			//request.ContentType = "application/x-www-form-urlencoded";

			request.UserAgent = "inbox2";

			string authParams = BuildOAuthParams(sourceUri, consumerKey, consumerSecret, token, tokenSecret, null, "PUT");

			request.Headers.Add("Authorization", authParams);



			byte[] bytes = Encoding.UTF8.GetBytes(data);

			request.ContentLength = bytes.Length;



			// Write post data to request stream

			using (Stream requestStream = request.GetRequestStream())

				requestStream.Write(bytes, 0, bytes.Length);



			HttpWebResponse response = (HttpWebResponse)request.GetResponse();



			using (var responseStream = response.GetResponseStream())

				return responseStream.ReadString();

		}



		public static string PerformRequest(Uri sourceUri, string consumerKey, string consumerSecret)

		{

			HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(sourceUri);

			request.Method = "POST";

			request.ContentType = "application/x-www-form-urlencoded";

			request.UserAgent = "inbox2";

			string authParams = BuildOAuthParams(sourceUri, consumerKey, consumerSecret, null, null, null);

			request.Headers.Add("Authorization", authParams);



			HttpWebResponse response = (HttpWebResponse)request.GetResponse();



			using (var responseStream = response.GetResponseStream())

				return responseStream.ReadString();

		}



		public static string PerformRequest(Uri sourceUri, string consumerKey, string consumerSecret, string token, string tokenSecret, string verifier)

		{

			HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(sourceUri);

			request.Method = "POST";

			request.ContentType = "application/x-www-form-urlencoded";

			request.UserAgent = "inbox2";

			string authParams = BuildOAuthParams(sourceUri, consumerKey, consumerSecret, token, tokenSecret, verifier);

			request.Headers.Add("Authorization", authParams);



			HttpWebResponse response = (HttpWebResponse)request.GetResponse();



			using (var responseStream = response.GetResponseStream())

				return responseStream.ReadString();

		}



		public static XDocument PerformRequest(Uri sourceUri, string consumerKey, string consumerSecret, string token, string tokenSecret, byte[] bytes)

		{

			HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(sourceUri);

			request.Method = "POST";

			request.ContentType = "application/x-www-form-urlencoded";

			request.UserAgent = "inbox2";

			request.Headers.Add("Authorization", BuildOAuthParams(sourceUri, consumerKey, consumerSecret, token, tokenSecret, null));



			request.ServicePoint.Expect100Continue = false;

			request.ContentLength = bytes.Length;



			// Write post data to request stream

			using (Stream requestStream = request.GetRequestStream())

				requestStream.Write(bytes, 0, bytes.Length);



			HttpWebResponse response = (HttpWebResponse)request.GetResponse();



			using (var responseStream = response.GetResponseStream())

				return XDocument.Parse(responseStream.ReadString());

		}



		public static XDocument PerformRequest(Uri sourceUri, string consumerKey, string consumerSecret, string token, string tokenSecret)

		{

			HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(sourceUri);

			request.Method = "GET";

			request.UserAgent = "inbox2";

			string authParams = BuildOAuthParams(sourceUri, consumerKey, consumerSecret, token, tokenSecret, null, "GET");

			request.Headers.Add("Authorization", authParams);



			HttpWebResponse response = (HttpWebResponse)request.GetResponse();



			string responseString;

			using (var responseStream = response.GetResponseStream())

				responseString = responseStream.ReadString();



			return XDocument.Parse(responseString);

		}



		static string BuildOAuthParams(Uri source, string consumerKey, string consumerSecret, string token, string tokenSecret, string verifier)

		{

			return BuildOAuthParams(source, consumerKey, consumerSecret, token, tokenSecret, verifier, "POST");

		}



		static string BuildOAuthParams(Uri source, string consumerKey, string consumerSecret, string token, string tokenSecret, string verifier, string httpMethod)

		{

			OAuthBase oauth = new OAuthBase();



			string timeStamp = OAuthBase.GenerateTimeStamp();

			string nonce = OAuthBase.GenerateNonce();



			// Calling source.Query returns an urlencoded string, but we don't want that since we will use

			// oauth.UrlEncode ourselves

			var query = HttpUtility.UrlDecode(source.Query.Contains("?") ? source.Query.Remove(0, 1) : source.Query);

			var parameters = NameValueParser.GetCollection(query, "&");



			parameters.Add("oauth_nonce", nonce);

			parameters.Add("oauth_signature_method", "HMAC-SHA1");



			parameters.Add("oauth_timestamp", timeStamp);

			parameters.Add("oauth_consumer_key", consumerKey);



			if (!String.IsNullOrEmpty(token))

				parameters.Add("oauth_token", token);



			if (!String.IsNullOrEmpty(verifier))

				parameters.Add("oauth_verifier", verifier);



			parameters.Add("oauth_version", "1.0");



			StringBuilder requestBuilder = new StringBuilder();



			string signature = oauth.GenerateSignature(source, parameters, consumerKey, consumerSecret, token, tokenSecret, httpMethod, timeStamp, nonce, OAuthBase.SignatureTypes.HMACSHA1);



			parameters.Add("oauth_signature", signature);



			requestBuilder.Append("OAuth ");



			foreach (string key in parameters)

			{

				requestBuilder.Append(key);

				requestBuilder.Append("=");

				requestBuilder.Append(@"""" + OAuthBase.UrlEncode(parameters[key]) + @"""");



				requestBuilder.Append(", ");

			}



			return requestBuilder.ToString();

		}

	}

}