Umer Pasha Blogs

www.umerpasha.com

C# dot net code to get latest tweets using twitter API 1.1

Twitter just recently retired their old API 1.0. The new API requires oAuth. Following code will help you jumpstart to write code in C# to get your tweets.

This is using dot net framework 4.0
I am also using NewtonSoft’s excellent JSON library. You can get it here. Use the dot net 4.0 library and add as a reference to your C# Web project.

You first have to create a twitter app here. Use the oAuth Tool tab to get the 4 tokens/codes that you will be replacing in the code below.


Default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div id="myDiv" runat="server">
    
    </div>s
    </form>
</body>
</html>


Default.aspx.cs


using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text;
using System.Security.Cryptography;
using System.Net;
using System.IO;
using Newtonsoft.Json.Linq;


public partial class _Default : System.Web.UI.Page
{


    public string query = "umerpasha";
//    public string url = "https://api.twitter.com/1.1/users/search.json" ;
    public string url = "https://api.twitter.com/1.1/statuses/user_timeline.json" ;


    protected void Page_Load(object sender, EventArgs e)
    {
        findUserTwitter(url, query);
    }

    public void findUserTwitter(string resource_url, string q)
    {

        // oauth application keys
        var oauth_token = "xxx"; //"insert here...";
        var oauth_token_secret = "xxx"; //"insert here...";
        var oauth_consumer_key = "xxx";// = "insert here...";
        var oauth_consumer_secret = "xxx";// = "insert here...";

        // 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();


        // 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}&q={6}";

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

        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)
                        );



        ServicePointManager.Expect100Continue = false;

        // make the request
        var postBody = "q=" + Uri.EscapeDataString(q);//
        resource_url += "?" + postBody ;
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(resource_url);
        request.Headers.Add("Authorization", authHeader);
        request.Method = "GET";
        request.ContentType = "application/x-www-form-urlencoded";
        var response = (HttpWebResponse)request.GetResponse();
        var reader = new StreamReader(response.GetResponseStream());
        var objText = reader.ReadToEnd();
        myDiv.InnerHtml = objText;/**/
        string html = "";
        try
        {
            JArray jsonDat = JArray.Parse(objText);
            for (int x = 0; x < jsonDat.Count(); x++)
            {
                //html += jsonDat[x]["id"].ToString() + "<br/>";
                html += jsonDat[x]["text"].ToString() + "<br/>";
               // html += jsonDat[x]["name"].ToString() + "<br/>";
                html += jsonDat[x]["created_at"].ToString() + "<br/>";

            }
            myDiv.InnerHtml = html;
        }
        catch (Exception twit_error)
        {
            myDiv.InnerHtml = html + twit_error.ToString();
        }
    }
}
Advertisements
96 Comments »