Headless.Api.FluentValidation 0.4.15

.NET 10.0

dotnet add package Headless.Api.FluentValidation --version 0.4.15

NuGet\Install-Package Headless.Api.FluentValidation -Version 0.4.15

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="Headless.Api.FluentValidation" Version="0.4.15" />

For projects that support PackageReference, copy this XML node into the project file to reference the package.

<PackageVersion Include="Headless.Api.FluentValidation" Version="0.4.15" />
                    

                            Directory.Packages.props

<PackageReference Include="Headless.Api.FluentValidation" />
                    

                            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 Headless.Api.FluentValidation --version 0.4.15

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

#r "nuget: Headless.Api.FluentValidation, 0.4.15"

#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 Headless.Api.FluentValidation@0.4.15

#: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=Headless.Api.FluentValidation&version=0.4.15
                    

                            Install as a Cake Addin

#tool nuget:?package=Headless.Api.FluentValidation&version=0.4.15
                    

                            Install as a Cake Tool

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Headless.Api.FluentValidation

FluentValidation extensions for validating ASP.NET Core IFormFile uploads including size, content type, and file signature verification.

Problem Solved

Provides reusable, type-safe validators for file uploads with proper error messages, eliminating boilerplate validation code for common file upload scenarios and preventing extension spoofing attacks.

Key Features

FileNotEmpty() - Validates file has content
GreaterThanOrEqualTo(bytes) - Minimum file size validation
LessThanOrEqualTo(bytes) - Maximum file size validation
ContentTypes(list) - MIME type whitelist validation
HaveSignatures(inspector, predicate) - Magic bytes/file signature validation
Localized error messages (English, Arabic)

Installation

dotnet add package Headless.Api.FluentValidation

Quick Start

using FluentValidation;
using Headless.FluentValidation;
using FileSignatures;
using FileSignatures.Formats;

public sealed class UploadRequestValidator : AbstractValidator<UploadRequest>
{
    public UploadRequestValidator(IFileFormatInspector inspector)
    {
        RuleFor(x => x.Avatar)
            .FileNotEmpty()
            .LessThanOrEqualTo(5 * 1024 * 1024) // 5MB
            .ContentTypes(["image/jpeg", "image/png"])
            .HaveSignatures(inspector, format => format is Jpeg or Png);
    }
}

Configuration

No configuration required.

Dependencies

Headless.FluentValidation
FileSignatures
Microsoft.AspNetCore.App (framework reference)

Side Effects

None.

Product	Compatible and additional computed target framework versions.
.NET	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.