Masto.NET

Masto.NET is a .net standard library for Mastodon written in C#.

Sample

If you prefer to browse code, you can go the the sample project : https://github.com/glacasa/Mastonet.SampleApp

Nuget

A preview version is available on Nuget : https://www.nuget.org/packages/Mastonet

Run the following command in the Package Manager Console :

Install-Package Mastonet -Pre

How to use

App registration

You need to obtain a ClientId and a ClientSecret for your app, directly from the client, on the target Mastodon instance. Call the static CreateApp method :

var authClient = new AuthenticationClient("instanceUrl");
var appRegistration = await authClient.CreateApp("Your app name", Scope.Read | Scope.Write | Scope.Follow);

The appRegistration object must be saved.

User login, using e-mail and password

Now you can connect the user (not recommended, prefer OAuth when you can) :

var auth = await authClient.ConnectWithPassword("email", "password");

User login, using OAuth

The recommended way to login is to use OAuth. You open a web browser and let the user login himself on his instance.

var url = authClient.OAuthUrl();
OpenBrowser(url);

You can either embed a WebView in you app, or open an external browser. When the user allowed your app to access its account, he is redirected to a web page with an auth code.

You have several option to get the code :

Ask the user to copy and paste it in your app (easy for you, but not user-friendly)
If you have embedded a WebView in your app, you can read the final page. The code is in the url, and in the webpage embedded in a <code> tag

If you are in a web context, you can set the final page url, and the user will be redirected directly to your server with the code. Just add your url to the OAuthUrl method.

var url = authClient.OAuthUrl(myRedirectPage);

Now this code will let you get the access token for the user

var auth = await authClient.ConnectWithCode(authCode);

Connect with existing authentication token

When you have the access token, you should save it in the app, and use it every time you restart the app. You just need to add it to the MastodonClient constructor.

var client = new MastodonClient(appRegistration, auth);

Now you can call all the API methods. See Mastodon API overview

Streaming

You can use the TimelineStreaming to be notified for every status, notification and deletion on a timeline.

var client =  new MastodonClient("instance", appRegistration, auth);
var streaming = client.GetUserStreaming();

// Register events
streaming.OnUpdate = OnStatusReceived;
streaming.OnNotification = OnNotificationReceived;
streaming.OnDelete = OnDeleteReceived;

// Start streaming
streaming.Start();


// ...

// Stop streaming
streaming.Stop();

Connection issues with .net framework

Some instances only accept TLS 1.2 requests, but .net Framework only support TLS 1.2 by default on version 4.6 and above If you are on version 4.5.2 or earlier, you should force using TLS 1.2 by this line of code before any request :

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

cormojs/Mastonet