using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Security.Cryptography;
namespace Twitter
{
class Program
{
static void Main(string[] args)
{
string consumerKey = ...;
string consumerSecret = ...;
string accessToken = ...;
string accessTokenSecret = ...;
string URL = "https://api.twitter.com/1.1/search/tweets.json";
Dictionary<string, string> parameters = new Dictionary<string, string>() { { "q", "zzz" } };
WebRequest request = CreateRequest(
consumerKey, consumerSecret, accessToken, accessTokenSecret,
"GET", URL, parameters);
using (WebResponse response = request.GetResponse())
{
using (Stream stream = response.GetResponseStream())
{
using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
{
Console.Write(reader.ReadToEnd());
}
}
}
}
static public WebRequest CreateRequest(
string consumerKey, string consumerSecret, string accessToken, string accessKey,
string method, string url, Dictionary<string, string> parameters)
{
string encodedParams = EncodeParameters(parameters);
WebRequest request;
if (method == "GET")
request = WebRequest.Create(string.Format("{0}?{1}", url, encodedParams));
else
request = WebRequest.Create(url);
request.Method = method;
request.ContentType = "application/x-www-form-urlencoded";
request.Headers.Add(
"Authorization",
MakeOAuthHeader(consumerKey, consumerSecret, accessToken, accessKey, method, url, parameters));
if (method == "POST")
{
byte[] postBody = new ASCIIEncoding().GetBytes(encodedParams);
using (Stream stream = request.GetRequestStream())
{
stream.Write(postBody, 0, postBody.Length);
}
}
return request;
}
static string EncodeParameters(Dictionary<string, string> parameters)
{
if (parameters.Count == 0)
return string.Empty;
Dictionary<string, string>.KeyCollection.Enumerator keys = parameters.Keys.GetEnumerator();
keys.MoveNext();
StringBuilder sb = new StringBuilder(
string.Format("{0}={1}", keys.Current, Uri.EscapeDataString(parameters[keys.Current])));
while (keys.MoveNext())
sb.AppendFormat("&{0}={1}", keys.Current, Uri.EscapeDataString(parameters[keys.Current]));
return sb.ToString();
}
static string MakeOAuthHeader(string consumerKey, string consumerSecret, string accessToken, string accessKey,
string method, string url, Dictionary<string, string> parameters)
{
TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
string oauth_consumer_key = consumerKey;
string oauth_nonce = Convert.ToBase64String(new ASCIIEncoding().GetBytes(DateTime.Now.Ticks.ToString()));
string oauth_signature_method = "HMAC-SHA1";
string oauth_token = accessToken;
string oauth_timestamp = Convert.ToInt64(ts.TotalSeconds).ToString();
string oauth_version = "1.0";
SortedDictionary<string, string> sd = new SortedDictionary<string, string>();
if (parameters != null)
foreach (string key in parameters.Keys)
sd.Add(key, Uri.EscapeDataString(parameters[key]));
sd.Add("oauth_version", oauth_version);
sd.Add("oauth_consumer_key", oauth_consumer_key);
sd.Add("oauth_nonce", oauth_nonce);
sd.Add("oauth_signature_method", oauth_signature_method);
sd.Add("oauth_timestamp", oauth_timestamp);
sd.Add("oauth_token", oauth_token);
StringBuilder sb = new StringBuilder();
sb.AppendFormat("{0}&{1}&", method, Uri.EscapeDataString(url));
foreach (KeyValuePair<string, string> entry in sd)
sb.Append(Uri.EscapeDataString(string.Format("{0}={1}&", entry.Key, entry.Value)));
string baseString = sb.ToString().Substring(0, sb.Length - 3);
string oauth_token_secret = accessKey;
string signingKey = string.Format(
"{0}&{1}", Uri.EscapeDataString(consumerSecret), Uri.EscapeDataString(oauth_token_secret));
HMACSHA1 hasher = new HMACSHA1(new ASCIIEncoding().GetBytes(signingKey));
string oauth_signature = Convert.ToBase64String(hasher.ComputeHash(new ASCIIEncoding().GetBytes(baseString)));
sb = new StringBuilder("OAuth ");
sb.AppendFormat("oauth_consumer_key=\"{0}\",", Uri.EscapeDataString(oauth_consumer_key));
sb.AppendFormat("oauth_nonce=\"{0}\",", Uri.EscapeDataString(oauth_nonce));
sb.AppendFormat("oauth_signature=\"{0}\",", Uri.EscapeDataString(oauth_signature));
sb.AppendFormat("oauth_signature_method=\"{0}\",", Uri.EscapeDataString(oauth_signature_method));
sb.AppendFormat("oauth_timestamp=\"{0}\",", Uri.EscapeDataString(oauth_timestamp));
sb.AppendFormat("oauth_token=\"{0}\",", Uri.EscapeDataString(oauth_token));
sb.AppendFormat("oauth_version=\"{0}\"", Uri.EscapeDataString(oauth_version));
return sb.ToString();
}
}
}
