DataFilters.AspNetCore 0.4.0

.NET 5.0 .NET Standard 2.1 
dotnet add package DataFilters.AspNetCore --version 0.4.0
NuGet\Install-Package DataFilters.AspNetCore -Version 0.4.0
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="DataFilters.AspNetCore" Version="0.4.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add DataFilters.AspNetCore --version 0.4.0
#r "nuget: DataFilters.AspNetCore, 0.4.0"
#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. 
// Install DataFilters.AspNetCore as a Cake Addin
#addin nuget:?package=DataFilters.AspNetCore&version=0.4.0

// Install DataFilters.AspNetCore as a Cake Tool
#tool nuget:?package=DataFilters.AspNetCore&version=0.4.0

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DataFilters.AspNetCore

Table of contents

  • <a href='#why'>Why</a>
    • <a href='#build-ifilters'>Make it easier to build IFilter instances</a>
    • <a href='#reduce-bandwith-usage'>Reduce bandwith usage</a>
      • <a href='#custom-http-headers'>Custom HTTP headers</a>
      • <a href='#prefer-http-header-support'>Prefer HTTP header support</a>
  • <a href='#how-to-install'>How to install</a>

A small library that ease usage of DataFilters with ASP.NET Core APIs.

<a href="#" id="why">Why</a>

<a href="#" id="build-ifilters">Make it easier to build IFilter instances</a>

DataFilters allows to build complex queries in a "restfull" way so However, it comes with some drawbacks.

In order to build a filter, you have to :

  1. parse the incoming string
  2. map it manually to an underlying model type.
  3. converts it into an IFilter instance using the ToFilter<T> extension method.

This can be a tedious task and this library can help to ease that process.

<a href="#" id="reduce-bandwith-usage">Reduce the bandwith usage</a>

The library can help reduce bandwith usage. This can be done in two differnet ways :

  • using x-datafilters-fields-include / x-datafilters-fields-exclude custom HTTP headers
  • using [Prefer] HTTP header, .
<a href="#" id="custom-http-headers"> Custom HTTP headers</a>
x-datafilters-fields-include

x-datafilters-fields-include custom HTTP header allows to specified which properties that will be kept in the body response.

x-datafilters-fields-exclude

x-datafilters-fields-exclude custom HTTP header allows to specify which properties that will be dropped from the body response.

These custom headers can be handy for mobile clients that query a REST API by reducing the volume of data transfered from backend. This can also allow to design one API that can serve multiple clients : each client could "select" the properties it want to display.

<a href="#" id="prefer-http-header-support">Prefer HTTP header support</a>

This library offers a limited support of the Prefer HTTP header. Specifically, a client can request a "minimal" representation of the resource by setting the Prefer: return=minimal HTTP header.

Given the following request

GET /api/users HTTP/1.1

Prefer: return=minimal

and the following C# class where the MinimalAttribute is applied to both Name and Id properties :

public class Person
{
    [Minimal]
    public Guid Id { get; set; }
    [Minimal]
    public string Name { get; set; }
    public string Email { get; set; }
}

the server can respond with a "minimal" representation of the resource.

HTTP/1.1 200 OK

<headers omitted for brevity>

[
   {
       "id": "83c39be2-5123-47bf-a1d1-9df15d146e6a",
       "name": "John Doe"
   },
   {
       "id": 2,
       "name": "Jane Doe"
   }
]

To enable support of the Prefer: return=minimal HTTP header :

  1. Register an instance of [PreferActionFilterAttribute][cls-filters-prefer] in your filters
services.Filters.Add(new PrefiPropertyFilterAttribute());
  1. Annotate properties in your classes with MinimalAttribute.

Improve performances

The library comes with a IDataFilterService that can be used to build caches IFilter instances created by the service.

<a href='#' id='how-to-install'>How to install</a>

  1. Simply run dotnet install DataFilters.AspNetCore to add the package to your solution
  2. You're ready to go
Product Compatible and additional computed target framework versions.
.NET net5.0 is compatible.  net5.0-windows was computed.  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 was computed.  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 was computed.  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. 
.NET Core netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.1 is compatible. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
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NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

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Version Downloads Last updated
0.4.0 750 8/17/2022
0.3.0 409 8/14/2022
0.2.0 539 3/29/2022
0.1.0 359 5/16/2021
0.1.0-beta0001 265 5/15/2021

• Moved MinimalAttribute to a dedicated [DataFilters.AspNetCore.Attributes](https://nuget.org/packages/DataFilters.AspNetCore.Attributes) nuget package
• Added IDataFilterService.Compute<T>(string, FilterOptions) overload

Full changelog at https://github.com/candoumbe/DataFilters.AspNetCore/blob/main/CHANGELOG.md