To ensure your ABP API correctly reads the culture from the Accept-Language header, you should:
app.UseAbpRequestLocalization() only once, after configuring the options.UseAbpRequestLocalization is placed before UseAuthentication and UseAuthorization in the middleware pipeline.AcceptLanguageHeaderRequestCultureProvider should be the first provider in the RequestCultureProviders list, as you have done.Your configuration is almost correct, but you should remove the second call to app.UseAbpRequestLocalization(); (you only need to call it once with your options). The correct order is:
public override void OnApplicationInitialization(ApplicationInitializationContext context)
{
var app = context.GetApplicationBuilder();
var env = context.GetEnvironment();
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
var supportedCultures = new[]
{
new CultureInfo("en-GB"),
new CultureInfo("tr-TR")
};
app.UseAbpRequestLocalization(options =>
{
options.DefaultRequestCulture = new RequestCulture("en-GB");
options.SupportedCultures = supportedCultures;
options.SupportedUICultures = supportedCultures;
options.RequestCultureProviders = new List<IRequestCultureProvider>
{
new AcceptLanguageHeaderRequestCultureProvider(),
new QueryStringRequestCultureProvider(),
new CookieRequestCultureProvider()
};
});
// ... other middleware registrations ...
app.UseAuthentication();
app.UseAuthorization();
// ... rest of your pipeline ...
}
Key Points:
UseAbpRequestLocalization once, with your configuration.AcceptLanguageHeaderRequestCultureProvider will automatically pick up the Accept-Language header from incoming requests.This will allow your API to respect the Accept-Language header and set the culture accordingly.
Sources:
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IsConventionalRegistrationDisabled(Type type) method. This usually happens if there is a type in your project that cannot be registered conventionally, or if there is a misconfiguration in your module or dependency injection setup.To resolve this:
Check for Abstract or Generic Types:
Ensure you do not have abstract classes, open generic types, or types that should not be registered (such as base classes or marker interfaces) in your module assemblies. ABP tries to register all types it finds by convention, so any type that cannot be instantiated will cause this error.
Disable Conventional Registration for Problematic Types:
If you have a type that should not be registered, you can disable its conventional registration by using the [DisableConventionalRegistration] attribute:
[DisableConventionalRegistration]
public abstract class MyBaseService
{
// ...
}
Or, you can override the IsConventionalRegistrationDisabled method in your custom registrar if you have one.
Check Your Module Dependencies:
Make sure your module dependencies are correct and do not reference assemblies that are not meant to be scanned for DI registration.
Review Recent Changes:
If this error started after adding a new service, class, or module, review those changes for types that should not be registered.
Clean and Rebuild:
Sometimes, stale binaries can cause issues. Clean your solution and rebuild.
Check for Duplicate or Conflicting Types:
Ensure there are no duplicate types or conflicting class names across your assemblies.
If you need to debug further, you can temporarily comment out or remove recently added classes or modules to isolate the problematic type.
Sources:
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The "Invalid token" error during email confirmation in ABP Framework is typically caused by one of the following issues:
Token Expiry or Reuse: Email confirmation tokens are single-use and expire after a certain period. If the user tries to use the same token twice (e.g., clicking the link again after confirming), it will show as invalid. This is by design for security.
Data Protection Key Issues: If your application uses distributed environments (multiple servers, containers, or environments), the data protection keys used to generate and validate tokens must be shared and consistent across all instances. If the keys change (e.g., after a redeploy, or if Redis/DB is cleared), previously generated tokens become invalid.
Tenant Context: In a multi-tenant setup, ensure the correct tenant context is set when validating the token. The token is tenant-specific.
ABP Upgrade Impact: Upgrading ABP or changing the data protection configuration can invalidate existing tokens if the key ring changes.
Ensure Data Protection Key Persistence:
For distributed or production environments, persist your data protection keys using Redis or a shared file system. Your configuration looks correct, but ensure the Redis instance is stable and not cleared between deployments.
var dataProtectionBuilder = context
.Services.AddDataProtection()
.SetApplicationName("BetterBilling")
.SetDefaultKeyLifetime(TimeSpan.FromDays(365));
if (!hostingEnvironment.IsDevelopment())
{
var redis = ConnectionMultiplexer.Connect(configuration["Redis:Configuration"]!);
dataProtectionBuilder.PersistKeysToStackExchangeRedis(
redis,
"BetterBilling-Protection-Keys"
);
}
Check for Key Loss:
If Redis or your key store was cleared, all previously issued tokens will be invalid. Users will need to request new confirmation emails.
Token Usage:
Tokens are single-use. If a user tries to confirm an already confirmed email, you may want to customize the error message to indicate the email is already confirmed (see below).
Customizing the Error Message:
As of ABP 7.3, the framework skips checking if EmailConfirmed is true before showing "invalid token." You can override the behavior in your custom page model to show a friendlier message if the email is already confirmed.
Example:
if (user.EmailConfirmed)
{
// Show "You already confirmed your email" message
}
else
{
// Show "Invalid token" message
}
If you recently upgraded ABP or changed your data protection configuration, all previously generated tokens will be invalid. Instruct users to request a new confirmation email if they encounter this error.
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To address the issue of large cookie sizes when implementing refresh tokens in Blazor Server with ABP, consider the following best practices:
Avoid Storing Tokens in Cookies:
Use Reference Tokens:
Adjust Cookie Authentication Options:
context.Services.ConfigureApplicationCookie(options =>
{
options.ExpireTimeSpan = TimeSpan.FromMinutes(60); // Set as needed
options.SlidingExpiration = true;
});
Use the "offline_access" Scope Only When Needed:
Consider Server-Side Token Storage:
Review Official Guidance:
By following these practices, you can avoid large cookies and ensure compatibility with application gateways and browsers.
Sources:
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To request a cancellation and refund within the 30-day window, you should contact ABP support directly through your support portal or the original purchase channel. Based on the referenced support ticket, refunds are processed upon request if you are within the eligible period.
If you have already submitted your request via the support portal, the ABP team will process your refund and confirm the cancellation. No further action is required on your part unless additional information is requested by support.
Source:
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The EmailSettingProvider class in the ABP Framework is marked as internal, which means it is only accessible within the Volo.Abp.Emailing assembly and cannot be overridden or accessed directly from outside that package.
This is a deliberate design choice by the ABP team to encapsulate the internal logic of how email settings are provided and managed. Instead of overriding EmailSettingProvider, ABP encourages developers to use the settings system (via ISettingProvider or ISettingManager) to customize or provide email settings. You can define your own settings providers or use the built-in mechanisms to set and retrieve email configuration values.
If you need to customize email settings, the recommended approach is to use the ABP settings infrastructure, not by overriding EmailSettingProvider directly.
Sources:
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Yes, it is possible to have both MAUI and React Native projects in the same ABP solution. ABP Studio supports creating solutions with either MAUI or React Native as the mobile application type, but only one can be selected during the initial solution creation. However, you can manually add a React Native project to your existing solution.
To add a React Native project to your current ABP solution (which already has a MAUI project):
Create a new React Native project using the ABP React Native template:
MyApp with your desired project name):
abp new MyApp -u react-native
Move the generated React Native project folder (e.g., MyApp) into your existing solution directory, typically alongside your angular, aspnet-core, and maui folders.
Add the new React Native project to your solution's source control and documentation for consistency.
Update your solution documentation and team workflow to reflect the presence of both mobile projects.
Each mobile project (MAUI and React Native) will be independent, but both can consume your backend APIs and share the same authentication and business logic via the API layer.
For more details on mobile application types in ABP Studio:
Best Regards
Sources:
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To create a completely custom UI for your ABP pages, you have several options depending on your UI framework (Angular, Blazor, MVC). Below is a step-by-step approach for Angular and Blazor, which are the most common:
For Angular UI:
angular.json to include the new styles and scripts.app.component.html) to use your new components and structure.For Blazor UI:
For login and other special pages, you can override the default pages by creating new Razor or Angular components and placing them in the correct folder structure.
For all UI types, you can add your own logos, colors, and branding by updating the relevant CSS and image files.
Sources (validated):
These guides provide detailed, step-by-step instructions for fully customizing your ABP application's UI.
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To set a tenant-specific connection string for a non-default (module-specific) database in ABP SaaS, but not require a "Default" connection string, you are running into a limitation of the current validation logic in the SaaS module UI. The validation enforces that the "Default" connection string is required unless "Use Shared Database" is checked, even if you only want to provide a module-specific connection string (e.g., for your DthOrderDb).
As a temporary workaround, you can provide a valid but unused connection string in the "Default" field (e.g., point it to a harmless or empty database). This will satisfy the validation, and your module-specific connection string will be used by your custom DbContext.
If you control the source, you can patch the validation logic in your fork or override the relevant Blazor component to relax the requirement for the "Default" connection string when at least one module-specific connection string is provided.
Example (pseudo-code for validation):
protected virtual void ValidateDefaultConnectionString(ValidatorEventArgs e)
{
var hasAnyModuleConnectionString = ConnectionStrings.ModuleConnectionStrings.Any(x => !x.Value.IsNullOrWhiteSpace());
e.Status = (!ConnectionStrings.UseSharedDatabase && ConnectionStrings.Default.IsNullOrWhiteSpace() && !hasAnyModuleConnectionString)
? ValidationStatus.Error
: ValidationStatus.Success;
e.ErrorText = e.Status == ValidationStatus.Error ? L["The {0} field is required.", L[$"DisplayName:{nameof(ConnectionStrings.Default)}"]] : null;
}
This would allow saving if at least one module-specific connection string is present.
The ABP team is aware of this limitation. You can follow or contribute to the discussion and possible fix here:
This is a known gap in the current SaaS module UI logic. Until it's addressed in the framework, the above workarounds are recommended.
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When multiple users are logged out simultaneously (such as due to inactivity), you may encounter the AbpDbConcurrencyException with a 409 error. This is caused by ABP's optimistic concurrency control, which is used to ensure data consistency when multiple operations attempt to modify the same data concurrently. In your case, the issue occurs during OpenIddict token operations, where multiple requests try to update or delete the same token record at the same time.
This is a known scenario with OpenIddict and ABP, especially when tokens are being revoked or deleted in parallel (e.g., mass logout or session expiration). The concurrency exception is thrown because the database operation expects to affect one row, but the row may have already been modified or deleted by another concurrent operation.
Understand Optimistic Concurrency: ABP uses optimistic concurrency by default for aggregate roots and entities implementing IHasConcurrencyStamp. When a concurrency conflict is detected, an exception is thrown to prevent data loss.
OpenIddict Token Concurrency: When multiple logout or token revocation requests happen at the same time, only one will succeed in updating/deleting the token, and the others will fail with a concurrency exception. This is expected behavior to ensure token integrity.
User Experience: The 409 error page is shown to the user because the exception is not handled gracefully. You can catch the AbpDbConcurrencyException globally and show a more user-friendly message or redirect the user to the login page.
Example (in your exception handling middleware or global error handler):
app.Use(async (context, next) =>
{
try
{
await next();
}
catch (AbpDbConcurrencyException)
{
// Redirect to login or show a custom message
context.Response.Redirect("/Account/Login");
}
});
No Data Loss: This exception does not cause data loss; it only prevents conflicting updates. The user should simply retry the operation or re-authenticate.
Further Reading and Community Discussion: This issue and its handling are discussed in the ABP support forum:
Sources:
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