[ArgoZhang]

Link issues

fixes #1251

Summary By Copilot

Regression?

• Yes
• No

Risk

• High
• Medium
• Low

Verification

• Manual (required)
• Automated

Packaging changes reviewed?

• Yes
• No
• N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Merge the latest code from the main branch

Summary by Sourcery

Add a shared, configurable SignalR hub for BootstrapBlazor messaging and online connection management.

New Features:

• Add configurable SignalR hub registration and endpoint mapping for BootstrapBlazor server applications.
• Support opt-in message subscriptions, client publishing, server-side dispatch, heartbeats, and connection snapshots through the shared hub.

Enhancements:

• Extract the client IP lookup endpoint handling into a dedicated request handler while preserving the existing middleware behavior.
• Add bilingual API documentation for the middleware and hub functionality.

[sourcery-ai]

Reviewer's Guide

Introduces a shared BootstrapBlazor SignalR hub with explicit configuration for dispatch types, client publishing, heartbeats, and connection snapshots; wires it into DI and endpoint routing while refactoring the existing IP lookup middleware into a dedicated handler.

Sequence diagram for SignalR message subscription and dispatch

sequenceDiagram
    actor Client
    participant Hub as BootstrapBlazorHub
    participant Handler as DispatchHandler
    participant Service as DefaultDispatchService
    participant Subscribers as SignalR subscribers

    Client->>Hub: Subscribe(entryType)
    Hub->>Handler: SubscribeAsync(context, groups, entryType, options)
    Handler-->>Client: true or false
    Client->>Hub: Dispatch(entryType, entry)
    Hub->>Handler: DispatchAsync(context, entryType, entry, options, services)
    Handler->>Service: DispatchAsync(entry, connectionId)
    Service->>Subscribers: Receive(entryType, entry)

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Sequence diagram for connection heartbeat and snapshot query

sequenceDiagram
    actor Client
    participant Hub as BootstrapBlazorHub
    participant Handler as ConnectionHandler
    participant ConnectionService as IConnectionService
    participant Authorization as IAuthorizationService

    Client->>Hub: Heartbeat(client)
    Hub->>Handler: ReportHeartbeatAsync(context, client, services)
    Handler->>ConnectionService: AddOrUpdateAsync(client)
    ConnectionService-->>Handler: completed
    Handler-->>Client: true
    Client->>Hub: GetConnectionSnapshot()
    Hub->>Handler: GetSnapshotAsync(context, options, services)
    opt ConnectionSnapshotAuthorizationPolicy configured
        Handler->>Authorization: AuthorizeAsync(user, policy)
    end
    Handler-->>Client: ConnectionSnapshot or null

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File-Level Changes

Change	Details	Files
Adds a shared, configurable SignalR hub for client subscriptions, server/client message dispatch, application heartbeats, and optional connection snapshots.	Introduces hub methods for subscribe, unsubscribe, dispatch, heartbeat, and snapshot retrieval. Adds opt-in entry-type registration with optional client publishing and payload deserialization. Implements group-based SignalR delivery, local subscriber callbacks, cancellation, and callback error isolation. Adds heartbeat validation, IP/user enrichment, connection persistence, and optional authorization for snapshots.	src/middleware/BootstrapBlazor.Middleware/BootstrapBlazorHub.cs src/middleware/BootstrapBlazor.Middleware/BootstrapBlazorHubOptions.cs src/middleware/BootstrapBlazor.Middleware/ConnectionHandler.cs src/middleware/BootstrapBlazor.Middleware/DefaultDispatchService.cs src/middleware/BootstrapBlazor.Middleware/DispatchHandler.cs
Exposes dependency-injection registration and endpoint-mapping APIs for the new hub.	Adds AddBootstrapBlazorHub configuration and registers SignalR plus the default generic dispatch service. Adds MapBootstrapBlazorHub with a configurable endpoint pattern and support for endpoint authorization conventions.	src/middleware/BootstrapBlazor.Middleware/ServiceCollectionExtensions.cs src/middleware/BootstrapBlazor.Middleware/BootstrapBlazor.Middleware.csproj
Preserves the existing client-IP endpoint while extracting its request handling and improving middleware documentation.	Moves /ip.axd response generation into a dedicated handler without changing its forwarded-IP behavior. Replaces conditional middleware branching with MapWhen and the extracted handler. Adds bilingual XML documentation and updates internal IP conversion documentation.	src/middleware/BootstrapBlazor.Middleware/BootstrapBlazorApplicationBuilderExtensions.cs src/middleware/BootstrapBlazor.Middleware/IpRequestHandler.cs src/middleware/BootstrapBlazor.Middleware/InternalIPAddressExtensions.cs

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#1251	Provide an extension method to register BootstrapBlazor's SignalR Hub services.	✅

Possibly linked issues

• feat(Middleware): add AddBootstraBlazorHub extension method #1251: The PR implements the requested AddBootstrapBlazorHub extension, along with SignalR service registration and Hub endpoint mapping.

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