mirror of https://github.com/abpframework/abp
liangshiwei
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# SignalR Integration
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> It is already possible to follow [the standard Microsoft tutorial](https://docs.microsoft.com/en-us/aspnet/core/tutorials/signalr) to add [SignalR](https://docs.microsoft.com/en-us/aspnet/core/signalr/introduction) to your application. However, ABP provides a SignalR integration packages that simplify the integration and usage.
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## Installation
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### Server Side
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It is suggested to use the [ABP CLI](CLI.md) to install this package.
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#### Using the ABP CLI
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Open a command line window in the folder of your project (.csproj file) and type the following command:
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```bash
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abp add-package Volo.Abp.AspNetCore.SignalR
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```
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> You typically want to add this package to the web or API layer of your application, depending on your architecture.
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#### Manual Installation
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If you want to manually install;
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1. Add the [Volo.Abp.AspNetCore.SignalR](https://www.nuget.org/packages/Volo.Abp.AspNetCore.SignalR) NuGet package to your project:
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```
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Install-Package Volo.Abp.BackgroundJobs.HangFire
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```
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Or use the Visual Studio NuGet package management UI to install it.
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2. Add the `AbpAspNetCoreSignalRModule` to the dependency list of your module:
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```csharp
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[DependsOn(
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//...other dependencies
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typeof(AbpAspNetCoreSignalRModule) //Add the new module dependency
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)]
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public class YourModule : AbpModule
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{
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}
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```
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> You don't need to use the `services.AddSignalR()` and the `app.UseEndpoints(...)`, it's done by the `AbpAspNetCoreSignalRModule`.
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### Client Side
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Client side installation depends on your UI framework / client type.
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#### ASP.NET Core MVC / Razor Pages UI
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Run the following command in the root folder of your web project:
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````bash
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yarn add @abp/signalr
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````
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> This requires to [install yarn](https://yarnpkg.com/) if you haven't install before.
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This will add the `@abp/signalr` to the dependencies in the `package.json` of your project:
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````json
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{
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...
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"dependencies": {
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...
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"@abp/signalr": "~2.7.0"
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}
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}
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````
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Run the `gulp` in the root folder of your web project:
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````bash
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gulp
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````
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This will copy the SignalR JavaScript files into your project:
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Finally, add the following code to your page/view to include the `signalr.js` file
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````xml
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@section scripts {
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<abp-script type="typeof(SignalRBrowserScriptContributor)" />
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}
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````
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It requires to add `@using Volo.Abp.AspNetCore.Mvc.UI.Packages.SignalR` to your page/view.
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> You could add the `signalr.js` file in a standard way. But using the `SignalRBrowserScriptContributor` has additional benefits. See the [Client Side Package Management](UI/AspNetCore/Client-Side-Package-Management.md) and [Bundling & Minification](UI/AspNetCore/Bundling-Minification.md) documents for details.
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That's all. you can use the [SignalR JavaScript API](https://docs.microsoft.com/en-us/aspnet/core/signalr/javascript-client) in your page.
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#### Other UI Frameworks / Clients
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Please refer to [Microsoft's documentation](https://docs.microsoft.com/en-us/aspnet/core/signalr/introduction) for other type of clients.
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## The ABP Framework Integration
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This section covers the additional benefits when you use the ABP Framework integration packages.
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### Hub Route & Mapping
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ABP automatically registers all the hubs to the [dependency injection](Dependency-Injection.md) (as transient) and maps the hub endpoint. So, you don't have to use the ` app.UseEndpoints(...)` to map your hubs. Hub route (URL) is determined conventionally based on your hub name.
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Example:
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````csharp
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public class MessagingHub : Hub
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{
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//...
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}
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````
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The hub route will be `/signalr-hubs/messasing` for the `MessasingHub`:
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* Adding a standard `/signalr-hubs/` prefix
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* Continue with the **camel case** hub name, without the `Hub` suffix.
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If you want to specify the route, you can use the `HubRoute` attribute:
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````csharp
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[HubRoute("/my-messasing-hub")]
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public class MessagingHub : Hub
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{
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//...
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}
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````
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### AbpHub Base Classes
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Instead of the standard `Hub` and `Hub<T>` classes, you can inherit from the `AbpHub` or `AbpHub<T>` which hve useful base properties like `CurrentUser`.
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Example:
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````csharp
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public class MessagingHub : AbpHub
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{
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public async Task SendMessage(string targetUserName, string message)
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{
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var currentUserName = CurrentUser.UserName; //Access to the current user info
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var txt = L["MyText"]; //Localization
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}
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}
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````
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> While you could inject the same properties into your hub constructor, this way simplifies your hub class.
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### Manual Registration / Mapping
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ABP automatically registers all the hubs to the [dependency injection](Dependency-Injection.md) as a **transient service**. If you want to **disable auto dependency injection** registration for your hub class, just add a `DisableConventionalRegistration` attribute. You can still register your hub class to dependency injection in the `ConfigureServices` method of your module if you like:
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````csharp
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context.Services.AddTransient<MessagingHub>();
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````
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When **you or ABP** register the class to the dependency injection, it is automatically mapped to the endpoint route configuration just as described in the previous sections. You can use `DisableAutoHubMap` attribute if you want to manually map your hub class.
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For manual mapping, you have two options:
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1. Use the `AbpSignalROptions` to add your map configuration (in the `ConfigureServices` method of your [module](Module-Development-Basics.md)), so ABP still performs the endpoint mapping for your hub:
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````csharp
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Configure<AbpSignalROptions>(options =>
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{
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options.Hubs.Add(
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new HubConfig(
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typeof(MessagingHub), //Hub type
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"/my-messaging/route", //Hub route (URL)
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hubOptions =>
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{
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//Additional options
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hubOptions.LongPolling.PollTimeout = TimeSpan.FromSeconds(30);
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}
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)
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);
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});
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````
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This is a good way to provide additional SignalR options.
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If you don't want to disable auto hub map, but still want to perform additional SignalR configuration, use the `options.Hubs.AddOrUpdate(...)` method:
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````csharp
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Configure<AbpSignalROptions>(options =>
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{
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options.Hubs.AddOrUpdate(
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typeof(MessagingHub), //Hub type
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config => //Additional configuration
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{
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config.RoutePattern = "/my-messaging-hub"; //override the default route
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config.ConfigureActions.Add(hubOptions =>
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{
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//Additional options
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hubOptions.LongPolling.PollTimeout = TimeSpan.FromSeconds(30);
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});
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}
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);
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});
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````
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This is the way you can modify the options of a hub class defined in a depended module (where you don't have the source code access).
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2. Change `app.UseConfiguredEndpoints` in the `OnApplicationInitialization` method of your [module](Module-Development-Basics.md) as shown below (added a lambda method as the parameter).
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````csharp
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app.UseConfiguredEndpoints(endpoints =>
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{
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endpoints.MapHub<MessagingHub>("/my-messaging-hub", options =>
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{
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options.LongPolling.PollTimeout = TimeSpan.FromSeconds(30);
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});
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});
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````
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### UserIdProvider
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ABP implements SignalR's `IUserIdProvider` interface to provide the current user id from the `ICurrentUser` service of the ABP framework (see [the current user service](CurrentUser.md)), so it will be integrated to the authentication system of your application. The implementing class is the `AbpSignalRUserIdProvider`, if you want to change/override it.
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## Example Application
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See the [SignalR Integration Demo](https://github.com/abpframework/abp-samples/tree/master/SignalRDemo) as a sample application. It has a simple Chat page to send messages between (authenticated) users.
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