Tiaga.ConcurrentRequestFilter.AspNetCore 1.0.0

.NET 6.0 This package targets .NET 6.0. The package is compatible with this framework or higher. 
dotnet add package Tiaga.ConcurrentRequestFilter.AspNetCore --version 1.0.0
                    


                    

                
NuGet\Install-Package Tiaga.ConcurrentRequestFilter.AspNetCore -Version 1.0.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Tiaga.ConcurrentRequestFilter.AspNetCore" Version="1.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Tiaga.ConcurrentRequestFilter.AspNetCore" Version="1.0.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Tiaga.ConcurrentRequestFilter.AspNetCore" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Tiaga.ConcurrentRequestFilter.AspNetCore --version 1.0.0
                    


                    

                
#r "nuget: Tiaga.ConcurrentRequestFilter.AspNetCore, 1.0.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Tiaga.ConcurrentRequestFilter.AspNetCore@1.0.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Tiaga.ConcurrentRequestFilter.AspNetCore&version=1.0.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Tiaga.ConcurrentRequestFilter.AspNetCore&version=1.0.0
                    


                            Install as a Cake Tool

Tiaga.ConcurrentRequestFilter.AspNetCore

A lightweight ASP.NET Core middleware that prevents concurrent mutable HTTP requests from the same user. When a user sends a mutable request (POST, PUT, PATCH, DELETE) while one is already in progress, the middleware returns 409 Conflict instead of processing it.

Motivation

Adding try-catch to every database call to handle errors from duplicate submissions (double-clicks, rapid retries, etc.) gets tedious. This middleware blocks the second request from the same user at the HTTP layer before it reaches the database, so those try-catch blocks are not needed.

Installation

dotnet add package Tiaga.ConcurrentRequestFilter.AspNetCore

Usage

Place app.UseConcurrentRequestFilter after app.UseAuthentication() and app.UseAuthorization() so the user identity is available.

Using a JWT sub claim (most common)

app.UseConcurrentRequestFilter(ctx => ctx.User.FindFirst("sub")?.Value);

Using a custom claim

app.UseConcurrentRequestFilter(ctx => ctx.User.FindFirst("userId")?.Value);

Using a custom entity/model value

app.UseConcurrentRequestFilter(ctx =>
{
    var userService = ctx.RequestServices.GetRequiredService();
    return userService.GetCurrentUserId(ctx)?.ToString();
});

With IP fallback for unauthenticated endpoints

app.UseConcurrentRequestFilter(ctx =>
    ctx.User.FindFirst("sub")?.Value
    ?? ctx.Connection.RemoteIpAddress?.ToString());

Configuration

By default the middleware guards POST, PUT, PATCH, and DELETE. You can override this:

app.UseConcurrentRequestFilter(
    ctx => ctx.User.FindFirst("sub")?.Value,
    options =>
    {
        options.MutableMethods = [HttpMethods.Post, HttpMethods.Delete];
    });

The identity provider lambda can return any string like claim values, email, integer IDs and IP. If it returns null, the lock is skipped and the request passes through, which is useful for unauthenticated endpoints like registration.

License

MIT

Product Compatible and additional computed target framework versions.
.NET net6.0 is compatible.  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 is compatible.  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 is compatible.  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.  net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

  • net10.0

    • No dependencies.

  • net6.0

    • No dependencies.

  • net7.0

    • No dependencies.

  • net8.0

    • No dependencies.

  • net9.0

    • No dependencies.

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
1.0.0 93 5/21/2026