WebReaper.Extraction.Generators 11.3.0

dotnet add package WebReaper.Extraction.Generators --version 11.3.0

NuGet\Install-Package WebReaper.Extraction.Generators -Version 11.3.0

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="WebReaper.Extraction.Generators" Version="11.3.0">
  <PrivateAssets>all</PrivateAssets>
  <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageReference>

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

<PackageVersion Include="WebReaper.Extraction.Generators" Version="11.3.0" />
                    

                            Directory.Packages.props

<PackageReference Include="WebReaper.Extraction.Generators">
  <PrivateAssets>all</PrivateAssets>
  <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageReference>
                    

                            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 WebReaper.Extraction.Generators --version 11.3.0

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

#r "nuget: WebReaper.Extraction.Generators, 11.3.0"

#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 WebReaper.Extraction.Generators@11.3.0

#: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=WebReaper.Extraction.Generators&version=11.3.0
                    

                            Install as a Cake Addin

#tool nuget:?package=WebReaper.Extraction.Generators&version=11.3.0
                    

                            Install as a Cake Tool

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

WebReaper.Extraction.Generators

Roslyn source generator that emits a static Schema and a reflection-free static Materialize method on partial classes marked with [ScrapeSchema]. The .NET-native structural differentiator (REPOSITIONING-PLAN §2.3): Pydantic-parity that Python's runtime reflection structurally cannot match.

Install

You usually want both packages together (this one is a compile-time analyzer; the attributes ship in a sibling package):

dotnet add package WebReaper.Extraction.Generators
dotnet add package WebReaper.Extraction.Attributes

WebReaper.Extraction.Generators is a DevelopmentDependency=true analyzer; it does not propagate to your project's runtime dependency graph.

What's emitted

For each class marked with [ScrapeSchema], the generator emits:

public partial class Article
{
    public static Schema Schema { get; }
    public static Article Materialize(JsonObject json);
}

Schema is built once at compile time from the [ScrapeField] attributes on the class's properties. Materialize is reflection-free; the AOT publish trims and inlines it.

Quick start

using WebReaper.Extraction.Attributes;
using WebReaper.Builders;

[ScrapeSchema]
public partial class Article
{
    [ScrapeField("h1")]                                              public string? Title { get; set; }
    [ScrapeField(".views", Type = SchemaFieldType.Integer)]          public int Views { get; set; }
    [ScrapeField(".tag", IsList = true)]                             public List<string> Tags { get; set; } = new();
}

var engine = await ScraperEngineBuilder
    .Crawl("https://example.com/post")
    .Extract(Article.Schema)
    .Subscribe(p => HandleArticle(Article.Materialize(p.Data)))
    .BuildAsync();

v1 scope

Common case only:

Single-level schemas
Primitive fields (string, int, bool, DateTime, float)
List<T> of primitives

Nested [ScrapeSchema] types are explicitly deferred to a future version. The attributes package supports the syntax; the generator does not yet emit code for nested classes.

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
11.3.0	91	6/6/2026
11.2.0	93	6/4/2026
11.1.2	98	6/3/2026
11.1.1	102	5/30/2026
11.1.0	97	5/30/2026
11.0.0	89	5/30/2026
10.2.0	97	5/29/2026
10.1.0	96	5/29/2026
10.0.0	99	5/26/2026

10.0.1: NuGet metadata polish. Adds PackageIcon + PackageReadmeFile so the package displays a logo and README on its NuGet page. Removes em-dashes from Description and release notes. No code changes. 10.0.0: initial release. Roslyn IIncrementalGenerator (ADR-0045) emitting a compile-time `static Schema Schema` and a reflection-free `static Materialize(JsonObject)` on partial classes marked with [ScrapeSchema]. AOT-clean: no reflection, no dynamic; the source-generator runs at compile time and emits ordinary C# the AOT publish trims and inlines. The .NET-native structural differentiator (REPOSITIONING-PLAN §2.3): Pydantic-parity Python cannot match. v1 ships the common case: single-level schemas, primitive fields, List<T> of primitives. Nested [ScrapeSchema] POCOs are explicitly deferred. Pairs with WebReaper.Extraction.Attributes; requires WebReaper 10.0.0 at runtime.