In ABP microservice architecture, when Microservice B (event handler) needs to call a protected API on Microservice C, you must ensure that B can authenticate itself to C. Since the event is not triggered by a user HTTP request, you cannot forward a user access token. The recommended approach is to use client credentials flow for service-to-service communication.
Steps:
Example (token acquisition in B):
var client = new HttpClient();
var disco = await client.GetDiscoveryDocumentAsync("https://identity-server-url");
var tokenResponse = await client.RequestClientCredentialsTokenAsync(new ClientCredentialsTokenRequest
{
Address = disco.TokenEndpoint,
ClientId = "microservice-b-client-id",
ClientSecret = "microservice-b-secret",
Scope = "microservice-c-scope"
});
var accessToken = tokenResponse.AccessToken;
Use this accessToken in the Authorization header when calling C:
client.SetBearerToken(accessToken);
var response = await client.GetAsync("https://microservice-c/api/protected-endpoint");
ABP provides infrastructure to automate this with dynamic HTTP clients and remoting modules. See the "Zero Trust Microservice Architecture" article for a full implementation, including token caching and automatic renewal.
Sources:
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ABP Framework currently does not natively support global EnableRetryOnFailure for all database operations, especially for OpenIddict and some internal modules. This is a known limitation, as documented in the following discussions:
The root cause is that OpenIddict (and some other ABP modules) use their own DbContext or transaction management, which may not be compatible with EF Core's built-in connection resiliency when EnableRetryOnFailure is enabled globally. This can lead to unexpected behavior or errors.
As of ABP v9.1.3, there is no official workaround that enables seamless, global retry logic for all database operations—including those performed by OpenIddict—without risking side effects or instability.
The only reliable approaches currently are:
For general EF Core connection resiliency recommendations, see the official Microsoft documentation:
If global retry support is a strict requirement for your production environment, you may need to consider alternative authentication modules or frameworks until ABP provides full compatibility.
Sources:
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The ABP Framework does not provide built-in antivirus or malware scanning for uploaded files. When implementing file upload/download using Angular and ABP, the framework handles file transfer and storage, but antivirus detection must be integrated separately at the backend.
To detect malicious files during upload, you should integrate a server-side antivirus scanning solution (such as ClamAV or a commercial antivirus API) in your application service or controller that processes the uploaded file. The Angular frontend cannot detect or interact with antivirus systems directly; this must be handled on the server after receiving the file.
The typical ABP file upload process involves sending the file from Angular to an app service (using IRemoteStreamContent or FormData). After receiving the file stream, you can scan the file before saving or processing it further.
Example (server-side, C#):
public async Task<Guid> UploadFileAsync(IRemoteStreamContent file)
{
using var stream = file.GetStream();
// Call your antivirus scanning logic here, e.g., ClamAV or other service
bool isClean = await MyAntivirusScanner.ScanAsync(stream);
if (!isClean)
{
throw new UserFriendlyException("Malicious file detected.");
}
// Save file if clean
// ...
}
Review your backend file handling logic to ensure antivirus scanning is performed before saving or serving files. If antivirus scanning is missing or misconfigured, malicious files may not be detected.
For more details on file upload/download in ABP:
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To download the source code for the LeptonX theme, including packages like @volosoft/ngx-lepton-x and @volo/ngx-lepton-x.core, you can use the ABP CLI:
abp get-source Volo.Abp.LeptonXTheme
abp get-source Volo.Abp.LeptonXTheme --preview
You can also directly download a demo project with LeptonX from:
For more details, see the official documentation:
These methods will provide you with the source code for the LeptonX theme and its related Angular packages.
Sources:
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To resolve the error regarding the missing 'Volo.Abp.Account.Pro.Public.Web' assembly when migrating from IdentityServer to OpenIddict in your auth-server, you need to ensure that all IdentityServer-related package references are fully replaced with their OpenIddict counterparts, as described in the official ABP migration guide.
Here are the key steps you should follow:
Update Package References:
<PackageReference Include="Volo.Abp.Account.Pro.Public.Web.IdentityServer" ... />
<PackageReference Include="Volo.Abp.AspNetCore.Authentication.JwtBearer" ... />
<PackageReference Include="Volo.Abp.Account.Pro.Public.Web.OpenIddict" Version="8.1.2" />
Update Module Dependencies:
using Volo.Abp.IdentityServer;
typeof(AbpAccountPublicWebIdentityServerModule)
using Volo.Abp.OpenIddict;
typeof(AbpAccountPublicWebOpenIddictModule)
Clean and Rebuild:
bin and obj folders in your solution.dotnet clean and dotnet build to ensure all old references are removed.Restore NuGet Packages:
dotnet restore to ensure all required packages are downloaded.nuget.config is correct and you are authenticated.Check for Transitive Dependencies:
Version Consistency:
If you follow these steps and the error persists, double-check that there are no lingering references to Volo.Abp.Account.Pro.Public.Web.IdentityServer or Volo.Abp.Account.Pro.Public.Web in any project or module dependency.
For more details, see the official migration guide:
This approach is based on the official ABP documentation and aligns with the recommended migration process.
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To restore sidebar/menu click functionality after customizing the LeptonX layout in your ABP Blazor Web App, you must ensure that your custom layout component inherits from the correct base layout and is registered to replace the default one. This is required because the built-in LeptonX layouts contain the logic and event handling for menu toggling and other interactive features.
Solution:
Inherit from the Correct Base Layout:
Your custom layout Razor file must inherit from SideMenuLayout (or the appropriate LeptonX layout base class), not just LayoutComponentBase. This ensures all built-in logic and event handlers are included.
Example:
@using Volo.Abp.AspNetCore.Components.Web.LeptonXTheme.Components.ApplicationLayout
@using Volo.Abp.DependencyInjection
@inherits SideMenuLayout
@attribute [ExposeServices(typeof(SideMenuLayout))]
@attribute [Dependency(ReplaceServices = true)]
<!-- Your custom markup here -->
Register the Custom Layout:
Use the [ExposeServices] and [Dependency(ReplaceServices = true)] attributes to ensure your layout replaces the default one.
Do Not Remove Required Markup or Logic: When customizing, avoid removing essential elements or logic (such as menu toggles, event handlers, or component references) from the base layout. If you need to add or move elements, do so within the structure provided by the base class.
Example Custom Layout:
@using Volo.Abp.AspNetCore.Components.Web.LeptonXTheme.Components.ApplicationLayout
@using Volo.Abp.DependencyInjection
@inherits SideMenuLayout
@attribute [ExposeServices(typeof(SideMenuLayout))]
@attribute [Dependency(ReplaceServices = true)]
<div>
<div id="lpx-wrapper">
<MainHeader />
<div class="lpx-content-container">
<div class="lpx-content-wrapper">
<div class="lpx-content">
<ContentToolbar />
<PageAlert />
<UiPageProgress />
@Body
<DynamicLayoutComponent />
<UiMessageAlert />
<UiNotificationAlert />
</div>
</div>
<footer>
<Footer />
</footer>
</div>
<MobileNavbar />
<div class="lpx-toolbar-container">
<MainHeaderToolbar />
</div>
</div>
</div>
Check for JavaScript or CSS Issues: If you have removed or altered required scripts/styles, restore them to ensure interactive features work.
Summary:
Always inherit from the correct LeptonX layout base class and use the required attributes to replace the default layout. This preserves all built-in interactive features, including sidebar toggling.
Sources:
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To explicitly invalidate or revoke access tokens on logout in an ABP.IO application using OpenIddict, you need to implement token revocation logic, as JWT access tokens are typically stateless and remain valid until expiration unless actively revoked.
Here’s how you can achieve this:
Enable Token Revocation in OpenIddict:
Call the Revocation Endpoint on Logout:
/connect/revocation endpoint with the token to be revoked. This can be done from your client or server-side code.Example HTTP request:
POST /connect/revocation
Content-Type: application/x-www-form-urlencoded
token={access_token}&token_type_hint=access_token&client_id={client_id}&client_secret={client_secret}
Custom Logic with OpenIddict Events (Optional):
OpenIddictServerEvents.ProcessSignOutContext.public class SignOutEventHandler : IOpenIddictServerHandler<OpenIddictServerEvents.ProcessSignOutContext>
{
public static OpenIddictServerHandlerDescriptor Descriptor { get; }
= OpenIddictServerHandlerDescriptor.CreateBuilder<OpenIddictServerEvents.ProcessSignOutContext>()
.UseSingletonHandler<SignOutEventHandler>()
.SetOrder(100_000)
.SetType(OpenIddictServerHandlerType.Custom)
.Build();
public ValueTask HandleAsync(OpenIddictServerEvents.ProcessSignOutContext context)
{
// Custom logic here (e.g., revoke tokens)
return ValueTask.CompletedTask;
}
}
Register the handler in your module:
public override void PreConfigureServices(ServiceConfigurationContext context)
{
PreConfigure<OpenIddictServerBuilder>(serverBuilder =>
{
serverBuilder.AddEventHandler(SignOutEventHandler.Descriptor);
});
}
Considerations:
Summary:
Sources:
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To add Microsoft as an external login provider in your ABP Blazor Web App (v9.2.1), you need to configure the authentication in your AuthServer project and optionally customize the UI if needed. Here’s a step-by-step guide:
Install Required NuGet Package
Microsoft.AspNetCore.Authentication.MicrosoftAccount.Configure Microsoft Authentication in AuthServer
AuthServer project, update the authentication configuration (usually in Startup.cs or Program.cs):context.Services.AddAuthentication()
.AddMicrosoftAccount(options =>
{
options.ClientId = configuration["Authentication:Microsoft:ClientId"];
options.ClientSecret = configuration["Authentication:Microsoft:ClientSecret"];
options.SaveTokens = true;
options.Scope.Add("email");
});
appsettings.json:"Authentication": {
"Microsoft": {
"ClientId": "YOUR_MICROSOFT_CLIENT_ID",
"ClientSecret": "YOUR_MICROSOFT_CLIENT_SECRET"
}
}
Configure Redirect URI in Azure Portal
https://<your-auth-server-domain>/signin-microsoftEnable Microsoft Login in the UI
Multi-Tenancy (if needed)
Test the Integration
Example Reference:
Customization:
Sources:
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To resolve the "'abp-loader-bar' is not a known element" and similar errors in your ABP Angular project, you need to ensure that the required ABP Angular modules are imported into your AppModule (or the relevant feature module). These components are provided by the ABP Angular UI libraries and must be registered in your module imports.
Follow these steps:
Make sure you have the following packages installed (use the version matching your ABP version, e.g., ~9.2.1):
yarn add @abp/ng.components @abp/ng.core @abp/ng.theme.shared
In your app.module.ts, import the necessary ABP modules:
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { CoreModule } from '@abp/ng.core';
import { ThemeSharedModule } from '@abp/ng.theme.shared';
import { AppComponent } from './app.component';
import { ComponentsModule } from '@abp/ng.components';
@NgModule({
declarations: [
AppComponent,
// ...other components
],
imports: [
BrowserModule,
CoreModule.forRoot({}),
ThemeSharedModule.forRoot(),
ComponentsModule, // <-- This is required for abp-loader-bar, abp-dynamic-layout, etc.
// ...other modules
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
Do not manually declare ABP components like InternetConnectionStatusComponent in your declarations array. They are already declared in the ABP modules.
After making these changes, stop and restart your Angular development server:
yarn start
This will register the ABP components and resolve the "not a known element" errors.
Sources:
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As of ABP v9.2.1, ABP Suite does not provide a built-in UI option to select or target a custom DbContext when generating new entities. By default, Suite scaffolds entities into the main application DbContext.
There is no official documentation or roadmap entry confirming that multi-DbContext selection in ABP Suite is planned for a future release.
Recommended Workaround:
This approach aligns with current ABP practices for multi-DbContext solutions. For more details and examples on handling multiple DbContexts and related repository patterns, see the following validated resources:
Sources:
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