Microsoft.Azure.WebPubSub.AspNetCore
1.3.0
Prefix Reserved
See the version list below for details.
dotnet add package Microsoft.Azure.WebPubSub.AspNetCore --version 1.3.0
NuGet\Install-Package Microsoft.Azure.WebPubSub.AspNetCore -Version 1.3.0
<PackageReference Include="Microsoft.Azure.WebPubSub.AspNetCore" Version="1.3.0" />
paket add Microsoft.Azure.WebPubSub.AspNetCore --version 1.3.0
#r "nuget: Microsoft.Azure.WebPubSub.AspNetCore, 1.3.0"
// Install Microsoft.Azure.WebPubSub.AspNetCore as a Cake Addin #addin nuget:?package=Microsoft.Azure.WebPubSub.AspNetCore&version=1.3.0 // Install Microsoft.Azure.WebPubSub.AspNetCore as a Cake Tool #tool nuget:?package=Microsoft.Azure.WebPubSub.AspNetCore&version=1.3.0
Azure Web PubSub service middleware client library for .NET
Azure Web PubSub Service is a service that enables you to build real-time messaging web applications using WebSockets and the publish-subscribe pattern. Any platform supporting WebSocket APIs can connect to the service easily, e.g. web pages, mobile applications, edge devices, etc. The service manages the WebSocket connections for you and allows up to 100K concurrent connections. It provides powerful APIs for you to manage these clients and deliver real-time messages.
Any scenario that requires real-time publish-subscribe messaging between server and clients or among clients, can use Azure Web PubSub service. Traditional real-time features that often require polling from server or submitting HTTP requests, can also use Azure Web PubSub service.
This library can be used to do the following actions. Details about the terms used here are described in Key concepts section.
- Parse upstream requests under CloudNative CloudEvents
- Add validation options for upstream request
- API to add user defined functionality to handle different upstream events
Source code |
---|
API reference documentation |
Product documentation |
Samples |
Getting started
Install the package
Install the client library from NuGet
dotnet add package Microsoft.Azure.WebPubSub.AspNetCore
Prerequisites
- An Azure subscription.
- An existing Azure Web PubSub service instance.
Authenticate the client
In order to interact with the service, you'll need to provide the Web PubSub service with a valid credential. To make this possible, you'll need the connection string or a key, which you can access in the Azure portal. Besides, if you want to invoke service REST API, you can call AddWebPubSubServiceClient<THub>()
where THub
is user implemented WebPubSubHub
listening to important events.
Configure Web PubSub service options
Configure with connection string:
public void ConfigureServices(IServiceCollection services)
{
services.AddWebPubSub(o =>
{
o.ServiceEndpoint = new("<connection-string>");
}).AddWebPubSubServiceClient<SampleHub>();
}
Configure with Azure Identity:
public void ConfigureServices(IServiceCollection services)
{
services.AddWebPubSub(o =>
{
o.ServiceEndpoint = new WebPubSubServiceEndpoint(new Uri("<endpoint"), new DefaultAzureCredential());
}).AddWebPubSubServiceClient<SampleHub>();
}
Map WebPubSubHub
to endpoint routing
public void Configure(IApplicationBuilder app)
{
app.UseEndpoints(endpoint =>
{
endpoint.MapWebPubSubHub<SampleHub>("/eventhandler");
});
}
Key concepts
For information about general Web PubSub concepts Concepts in Azure Web PubSub
WebPubSubHub
WebPubSubHub
is an abstract class to let users implement the subscribed Web PubSub service events. After user register the event handler in service side, these events will be forwarded from service to server. And WebPubSubHub
provides 4 methods mapping to the service events to enable users deal with these events, for example, client management, validations or working with Azure.Messaging.WebPubSub
to broadcast the messages. See samples below for details.
NOTE
Among the 4 methods,
OnConnectAsync()
andOnMessageReceivedAsync()
are blocking events that service will respect server returns. Besides the mapped correct response, server can throw exceptions whenever the request is against the server side logic. AndUnauthorizedAccessException
andAuthenticationException
will be converted to401Unauthorized
and rest will be converted to500InternalServerError
along with exception message to return service. Then service will drop current client connection.
Examples
Handle upstream Connect
event
private sealed class SampleHub : WebPubSubHub
{
internal WebPubSubServiceClient<SampleHub> _serviceClient;
// Need to ensure service client is injected by call `AddServiceHub<SampleHub>` in ConfigureServices.
public SampleHub(WebPubSubServiceClient<SampleHub> serviceClient)
{
_serviceClient = serviceClient;
}
public override ValueTask<ConnectEventResponse> OnConnectAsync(ConnectEventRequest request, CancellationToken cancellationToken)
{
var response = new ConnectEventResponse
{
UserId = request.ConnectionContext.UserId
};
return new ValueTask<ConnectEventResponse>(response);
}
}
Troubleshooting
Setting up console logging
You can also easily enable console logging if you want to dig deeper into the requests you're making against the service.
Next steps
Please take a look at the Samples directory for detailed examples on how to use this library.
Contributing
This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit https://cla.microsoft.com.
When you submit a pull request, a CLA-bot will automatically determine whether you need to provide a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.
This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.
Product | Versions Compatible and additional computed target framework versions. |
---|---|
.NET | net5.0 was computed. net5.0-windows was computed. net6.0 was computed. net6.0-android was computed. net6.0-ios was computed. net6.0-maccatalyst was computed. net6.0-macos was computed. net6.0-tvos was computed. net6.0-windows was computed. net7.0 was computed. net7.0-android was computed. net7.0-ios was computed. net7.0-maccatalyst was computed. net7.0-macos was computed. net7.0-tvos was computed. net7.0-windows was computed. net8.0 was computed. net8.0-android was computed. net8.0-browser was computed. net8.0-ios was computed. net8.0-maccatalyst was computed. net8.0-macos was computed. net8.0-tvos was computed. net8.0-windows was computed. |
.NET Core | netcoreapp3.1 is compatible. |
-
.NETCoreApp 3.1
- Azure.Messaging.WebPubSub (>= 1.3.0)
- Microsoft.Azure.WebPubSub.Common (>= 1.2.0)
- System.Memory.Data (>= 1.0.2)
- System.Text.Encodings.Web (>= 4.7.2)
- System.Text.Json (>= 4.7.2)
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 |
---|---|---|
1.4.0 | 3,038 | 9/26/2024 |
1.3.0 | 45,232 | 4/11/2024 |
1.2.0 | 79,282 | 8/30/2023 |
1.1.0 | 14,232 | 7/13/2023 |
1.0.0 | 40,616 | 4/13/2023 |
1.0.0-beta.4 | 23,548 | 11/11/2022 |
1.0.0-beta.3 | 22,315 | 1/7/2022 |
1.0.0-beta.2 | 207 | 12/9/2021 |
1.0.0-beta.1 | 1,081 | 11/12/2021 |