BlakePlugin.OpenGraph 1.0.0

.NET 9.0 This package targets .NET 9.0. The package is compatible with this framework or higher. 
dotnet add package BlakePlugin.OpenGraph --version 1.0.0
                    


                    

                
NuGet\Install-Package BlakePlugin.OpenGraph -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="BlakePlugin.OpenGraph" Version="1.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="BlakePlugin.OpenGraph" Version="1.0.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="BlakePlugin.OpenGraph" />
                    


                            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 BlakePlugin.OpenGraph --version 1.0.0
                    


                    

                
#r "nuget: BlakePlugin.OpenGraph, 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 BlakePlugin.OpenGraph@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=BlakePlugin.OpenGraph&version=1.0.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=BlakePlugin.OpenGraph&version=1.0.0
                    


                            Install as a Cake Tool

Blake OpenGraph Plugin (per‑route shells for social previews)

Add correct Open Graph tags to every Blake‑generated page without SSR, prerender, or edge functions. The plugin emits a small, standalone HTML "shell" per page at /.../index.html so social scrapers (which don’t run JS) get the right <head> on first byte.

Scope: only pages Blake generates from markdown. The site’s home page (wwwroot/index.html) is not modified.

What does it do

Blazor WASM (and most SPAs) inject <HeadContent> after the app boots. Social bots (Facebook, X/Twitter, LinkedIn, Slack, Discord, etc.) don’t execute JS, so they miss your OG tags. This plugin solves that by baking a per‑route HTML shell containing the correct meta, while retaining the Blazor UX.

  • Reads existing shell from wwwroot/index.html.
  • Builds a compact SEO/social <head> block per content page (title, description, canonical, og:*).
  • Writes a per‑page shell to wwwroot/<slug>/index.html.
  • Leaves your home page and the rest of your app untouched.

Result:

  • Bots fetch /posts/my-post/ and receive a real HTML file with the correct <head> immediately.
  • Humans (browsers) fetch the same URL and your Blazor app boots as normal.

Installation

  1. Add the plugin to your Blake site

    dotnet add package BlakePlugin.OpenGraph

  2. Bake with the required options (see Configuration). Example:

    blake bake --social:baseurl="https://example.com"

Note: You can omit the base URL argument in debug, but the plugin will not be able to generate absolute URLs for your Open Graph tags so you should include this in any CI builds.

The plugin writes files directly into your project’s wwwroot/ so they’ll be included by dotnet build and whatever static host you use.

Configuration

Required (Production):

  • --social:baseurl: Full origin used to build absolute URLs for og:url, og:image, and canonical.

    • Examples: https://example.com, https://user.github.io/repo

Output

For each generated page, the plugin writes:

wwwroot/
  posts/
    post-title/
      index.html   <-- shell with correct <head> (OG/Twitter/canonical)

The shell links to your existing CSS/JS; only the <head> differs per page.

The home page (wwwroot/index.html) is not altered by this plugin.

Meta set the plugin emits

The plugin uses Blake standard frontmatter so there is no additional configuration required.

# example.md
---
title: "Post title"
description: "Short summary for cards"
image: "/images/og/post-title.png"  # optional; plugin makes absolute via baseurl
tags: ["example", "post"]
...etc.
---

The plugin emits the following meta tags for each generated page:

  • <title> - mapped from the title in frontmatter
  • <meta name="description"> - mapped from the description in frontmatter
  • <link rel="canonical" href="ABSOLUTE_URL"> - built from the page URL combined with the baseurl
  • <meta property="og:type" content="article"> (content pages)
  • <meta property="og:title"> - mapped from the title in frontmatter
  • <meta property="og:description"> - mapped from the description in frontmatter
  • <meta property="og:url" content="ABSOLUTE_URL"> - built from the page URL combined with the baseurl
  • <meta property="og:image" content="ABSOLUTE_URL"> - built from the image in frontmatter (if present, omitted if not)

Values are HTML‑escaped; URLs are normalized and made absolute using baseurl.

Validation checklist

  • Curl:

    curl -s https://example.com/posts/post-title/ | grep -i "og:"

  • Debuggers: use Facebook Sharing Debugger, X Card Validator, and LinkedIn Post Inspector to refresh caches and verify cards.

  • Image: ensure your OG image returns 200, has proper Content-Type, is ≥ 1200×630, and < ~5 MB.

Troubleshooting

  • Missing per‑route file: confirm the page’s slug and that the plugin ran during blake bake.
  • Wrong URLs (nested paths): set --social:baseurl or use rooted links in your app.
  • Double slashes: the plugin normalizes common // patterns; still prefer clean paths in front‑matter.
  • No previews: some platforms cache aggressively—use their debuggers to “scrape again.”

Limitations (by design)

  • The plugin only emits meta in the head. It does not SSR your page body.
  • The site home page is not modified (ensure you add your own meta tags there).
  • The plugin only handles Open Graph tags (i.e. no Twitter Cards).
Product Compatible and additional computed target framework versions.
.NET 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 was computed.  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.

NuGet packages

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GitHub repositories

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Version Downloads Last Updated
1.0.0 147 8/19/2025