DotNetSseClient 1.2.0

.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher. 
dotnet add package DotNetSseClient --version 1.2.0
                    


                    

                
NuGet\Install-Package DotNetSseClient -Version 1.2.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="DotNetSseClient" Version="1.2.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="DotNetSseClient" Version="1.2.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="DotNetSseClient" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add DotNetSseClient --version 1.2.0
                    


                    

                
#r "nuget: DotNetSseClient, 1.2.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package DotNetSseClient@1.2.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=DotNetSseClient&version=1.2.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=DotNetSseClient&version=1.2.0
                    


                            Install as a Cake Tool

dotnet-sse-client

A lightweight Server-Sent Events (SSE) client built on HttpClient, with keyed DI registration for .NET applications.

Requirements

  • .NET 10 (net10.0)

Installation

dotnet add package DotNetSseClient

Quick start

using DotNetSseClient;
using Microsoft.Extensions.DependencyInjection;

var services = new ServiceCollection();
services.AddSseClient<MyEvent>(
    key: "events",
    baseAddress: "https://api.example.com/")
    .WithBearerToken((serviceProvider, cancellationToken) =>
    {
        var tokenProvider = serviceProvider.GetRequiredService<[YourTokenProvider]>();
        return ValueTask.FromResult(tokenProvider.GetToken(cancellationToken));
    })
    .OnUnauthorized((serviceProvider, _, cancellationToken) =>
    {
        var tokenProvider = serviceProvider.GetRequiredService<[YourTokenProvider]>();
        tokenProvider.Refresh(cancellationToken);
        return ValueTask.FromResult(true); // retry once with refreshed token
    });

await using var provider = services.BuildServiceProvider();
var stream = provider.GetRequiredKeyedService<SseClient<MyEvent>>("events");

await stream.StartAsync(
    "sse/updates",
    onMessage: message => Console.WriteLine(message),
    onError: ex => Console.Error.WriteLine(ex),
    onDisconnected: () => Console.WriteLine("Disconnected."));

Why keyed DI Registration?

In case you need to consume two different SSE streams in the same application using the same type, you can register two SseClient<T> instances with different keys and configurations.

Behavior notes

  • Endpoints passed to StartAsync can be relative or absolute.
  • WithBearerToken and WithApiKey are applied on every connect/reconnect attempt.
  • onUnauthorized is invoked on HTTP 401 and can opt into one immediate retry.
  • The client validates text/event-stream responses.
  • Automatic reconnect is supported, including Last-Event-ID continuation.
  • JSON parse errors are raised through the Error event and stream processing continues.
Product Compatible and additional computed target framework versions.
.NET net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
1.2.0 89 10/2/2026
1.1.0 87 10/2/2026

Use SseParser instead of manually parsing