Get Direct Messages for a particular user using https://api.twitter.com/1.1/direct_messages.json

oauth

#1

I am using https://api.twitter.com/1.1/direct_messages.json for retreiving messages for a particular user.
I am able to get 20 messages by default when using this URL but when i want to restrict the output to other than 20 using optional parameter “count” for this API I am getting “The remote server returned an error: (401) Unauthorized.” error.
Kindly help me in this scenario.
I am posting my code here.

        var oauth_token = "oauth token";
        var oauth_token_secret = "oauth token secret";
        var oauth_consumer_key = "consumer key";
        var oauth_consumer_secret = "consumer secret key";

        // oauth implementation details
        var oauth_version = "1.0";
        var oauth_signature_method = "HMAC-SHA1";

        // unique request details
        var oauth_nonce = Convert.ToBase64String(
            new ASCIIEncoding().GetBytes(DateTime.Now.Ticks.ToString()));
        var timeSpan = DateTime.UtcNow
            - new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
        var oauth_timestamp = Convert.ToInt64(timeSpan.TotalSeconds).ToString();

        // message api details
        var status = "Updating status via REST API if this works";
        var resource_url = "https://api.twitter.com/1.1/direct_messages.json";
        int count = 1;
       
        // create oauth signature
        var baseFormat = "oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method={2}" +
                        "&oauth_timestamp={3}&oauth_token={4}&oauth_version={5}&count={6}";
        //for default 20 messages
        //var baseFormat = "oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method={2}" +
                        //"&oauth_timestamp={3}&oauth_token={4}&oauth_version={5}&count={6}";

        var baseString = string.Format(baseFormat,
                                    oauth_consumer_key,
                                    oauth_nonce,
                                    oauth_signature_method,
                                    oauth_timestamp,
                                    oauth_token,
                                    oauth_version,
                                    Uri.EscapeDataString(count.ToString())
                                    );

        baseString = string.Concat("GET&", Uri.EscapeDataString(resource_url), "&", Uri.EscapeDataString(baseString));

        var compositeKey = string.Concat(Uri.EscapeDataString(oauth_consumer_secret),
                                "&", Uri.EscapeDataString(oauth_token_secret));

        string oauth_signature;
        using (HMACSHA1 hasher = new HMACSHA1(ASCIIEncoding.ASCII.GetBytes(compositeKey)))
        {
            oauth_signature = Convert.ToBase64String(
                hasher.ComputeHash(ASCIIEncoding.ASCII.GetBytes(baseString)));
        }

        // create the request header
        var headerFormat = "OAuth oauth_nonce=\"{0}\", oauth_signature_method=\"{1}\", " +
                           "oauth_timestamp=\"{2}\", oauth_consumer_key=\"{3}\", " +
                           "oauth_token=\"{4}\", oauth_signature=\"{5}\", " +
                           "oauth_version=\"{6}\"";

        var authHeader = string.Format(headerFormat,
                                Uri.EscapeDataString(oauth_nonce),
                                Uri.EscapeDataString(oauth_signature_method),
                                Uri.EscapeDataString(oauth_timestamp),
                                Uri.EscapeDataString(oauth_consumer_key),
                                Uri.EscapeDataString(oauth_token),
                                Uri.EscapeDataString(oauth_signature),
                                Uri.EscapeDataString(oauth_version)
                        );

        var postBody = "count=" + Uri.EscapeDataString(count.ToString());
        resource_url += "?" + postBody;
        //for default 20 messages
        //var postBody = "count=" + Uri.EscapeDataString(count.ToString());
        //resource_url += "?" + postBody;
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(resource_url);
        request.Headers.Add("Authorization", authHeader);
        request.Method = "GET";
        request.ContentType = "application/json; charset=utf-8";

        WebResponse response = request.GetResponse();
        string responseData = new StreamReader(response.GetResponseStream()).ReadToEnd();

#2

Hi All, Finally I found the solution to my own problem.
Just needed to correct the baseFormat and baseString.

var baseFormat = "count={6}&oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method={2}" +
"&oauth_timestamp={3}&oauth_token={4}&oauth_version={5}";
Hide   Copy Code
var baseString = string.Format(baseFormat,
                                       oauth_consumer_key,
                                       oauth_nonce,
                                       oauth_signature_method,
                                       oauth_timestamp,
                                       oauth_token,
                                       oauth_version,
                                       Uri.EscapeDataString(count.ToString())
                                       );

count will be passed prior to all the parameters.
Thanks.


#3