How to Post a Tweet with Twitter API V2

#dotnet #twitter

The following posts shows an easy way to automate Tweets using the latest Twitter API V2

The OAUTH Access token received from Twitter is only valid for 2 hours. The code will autoatically refreh the token.

You need offline.access to your scopes, this way you will get a refresh token

The NuGet Packages will developped step by step, giving you more features.

Prerequisites

Get Access & Refresh Token

Scopes: tweet.read%20tweet.write%20users.read%20offline.access
Create a Web Page, and add the link to your App OAUTH Settings (This can be a localhost)
CodeVerifier is an unique text, and should be saved temp., as in the next step, you will need it again. This parameter is required for Twitter OAUTH2

TwitterHelper _twitter = new()
            {
                ClientId = "CLIENT APP ID";
                ClientSecret = "CLIENT APP SECRET",
                RedirectUri = "YOUR PAGE URL TO REDIRECT",
                Scope = "TWITTER SCOPES,
                CodeVerifier = "Dhk87jJsks234"
            };
ViewBag.TwitterOAuthRequestUrl = _twitter.GetOAuthTokenUrl();

ViewBag.TwitterOAuthRequestUrl is the link the user should click on.

When the user accept your scopes and is redirected to your webpage

TwitterHelper _twitter = new()
            {
                ClientId = "CLIENT APP ID";
                ClientSecret = "CLIENT APP SECRET",                
                CodeVerifier = "Dhk87jJsks234",
                UseUrlEncodedHeader = true,
                OAuthCode = code,
            };
await _twitter.GetAccessToken();

The access code, refresh code, expiry dates are now accessible via _twitter object and you can save them in a database, or appsettings file

Send a Tweet

async Task SendTweet()
{
    // Load the Access & Refresh Token, Access Expiry Date

    TwitterHelper _twitter = new("CLIENT APP ID",
                                 "CLIENT APP SECRET",
                                 "ACCESS TOKEN",
                                 "ACCESS TOKEN EXPIRY DATE",
                                 "REFRESHTOKEN"
    );

    var _tweetID = await _twitter.Tweet("Hello Twitter! via CodeHelper.API.Twitter.V2");

    // when changed: save your Access & Refresh Token, Access 
    // Expiry Date
}