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POTwitter request token returns 401 unauthorized. I cant find what I did wrong
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  1. POTwitter request token returns 401 unauthorized. I cant find what I did wrong
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    copied!<p>I need to do twitter sign in for mobile apps. Thus far I have tried a lot of libraries including tweetsharp and linq2twitter. But I am getting nowhere. With all this trouble, I resorted to webclient calls, but I am once again stuck. When I make the call, I get the 401 Unauthorized error. I include my code here. Can you guys see anything wrong at all ? I am really stuck with this.</p> <pre><code> string oauth_signature_method = "HMAC-SHA1"; TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc); string oauth_timestamp = Convert.ToInt64(ts.TotalSeconds).ToString(); string oauth_version = "1.0"; string oauth_consumer_key = "iD1232134AQ2Pb6Q"; string oauth_nonce = Convert.ToBase64String(new ASCIIEncoding().GetBytes(DateTime.Now.Ticks.ToString())); SortedDictionary&lt;string, string&gt; sd = new SortedDictionary&lt;string, string&gt;(); 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); UrlEntity callback = new UrlEntity(); callback.Url = @"//tweeter"; string encodedCallbackUrl = HttpUtility.UrlEncode(callback.Url); sd.Add("oauth_callback",encodedCallbackUrl); WebClient wc = new WebClient(); wc.Headers.Add("User-Agent: randomAgent HTTP Client"); wc.Headers.Add("Host: api.twitter.com"); wc.Headers.Add(@"Accept: */*"); UrlEntity url = new UrlEntity(); url.Url = @"https://api.twitter.com/oauth/request_token"; string signature = CreateSignature(url, sd); sd.Add("oauth_signature",signature); string dataValues = ""; foreach (KeyValuePair&lt;string, string&gt; pair in sd) { dataValues += pair.Key + "=''" + pair.Value + "'',"; } dataValues = dataValues.Substring(0, dataValues.Length - 1); // cuts off the last, string headerVal = " Oauth " + dataValues; wc.Headers.Add("Authorization",headerVal); wc.UploadString(@"https://api.twitter.com/oauth/request_token", ""); wc.DownloadStringCompleted += WcOnDownloadStringCompleted; </code></pre> <p>Below is the code to make the signature.</p> <pre><code>public static string CreateSignature(UrlEntity url, SortedDictionary&lt;string, string&gt; sd) { string parameterString = ""; SortedDictionary&lt;string, string&gt; sd2 = new SortedDictionary&lt;string, string&gt;(); foreach (KeyValuePair&lt;string, string&gt; parameter in sd) { string encodedKey = HttpUtility.UrlEncode(parameter.Key); string encodedvalue = HttpUtility.UrlEncode(parameter.Value); sd2.Add(encodedKey,encodedvalue); } foreach (KeyValuePair&lt;string, string&gt; pair in sd2) { parameterString += pair.Key + "=" + pair.Value + "&amp;"; } parameterString = parameterString.Substring(0, parameterString.Length - 1); // cuts off the last &amp; string signatureString = "POST&amp;"; var encodedUrl = HttpUtility.UrlEncode(url.Url); // percent encode URL signatureString += encodedUrl + "&amp;"; signatureString += HttpUtility.UrlEncode(parameterString); // percent encode entire parameter string string consumerSecret = "supercorectConsumersecretfromtwitterwebsite"; string signingKey = HttpUtility.UrlEncode(consumerSecret) + "&amp;"; HMACSHA1 hasher = new HMACSHA1(new ASCIIEncoding().GetBytes(signingKey)); string signatureStringFinal = Convert.ToBase64String(hasher.ComputeHash(new ASCIIEncoding().GetBytes(signatureString))); return signatureStringFinal; } </code></pre> <p>It is a bit messy, but I am stuck. The following links might help. <a href="https://dev.twitter.com/docs/auth/implementing-sign-twitter" rel="nofollow">https://dev.twitter.com/docs/auth/implementing-sign-twitter</a> <a href="https://dev.twitter.com/docs/api/1/post/oauth/request_token" rel="nofollow">https://dev.twitter.com/docs/api/1/post/oauth/request_token</a> <a href="https://dev.twitter.com/docs/auth/creating-signature" rel="nofollow">https://dev.twitter.com/docs/auth/creating-signature</a></p> <p>EDIT:</p> <p>I have taken a look at the request using fiddler. The response message has this in it...</p> <p>"Failed to validate oauth signature and token"</p> <p>Which likely means the oauth signature is wrong. But I have looked and I have not seen anything.</p>
 

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