single binary Photino app hosting an in‑process ASP.NET Core server that serves a Bolero Server UI over loopback only, with embedded static assets

Ready-to-copy prompt for Junie

Use the following prompt with Junie to implement the “What you can do today” approach (single binary Photino app hosting an in‑process ASP.NET Core server that serves a Bolero Server UI over loopback only, with embedded static assets). This prompt asks Junie to generate the solution, code, and commands end‑to‑end with no Razor files.

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Please create a cross‑platform desktop app in F# 9/.NET 9 that:

• Uses Photino.NET for the desktop shell
• Hosts an in‑process ASP.NET Core server (Kestrel) using loopback only (ListenLocalhost) on a random free port
• Runs a Bolero Server (Blazor Server) UI with no Razor files (use Bolero’s F# HTML DSL only)
• Embeds all static assets so it can publish as a single file, self‑contained binary per OS
• Has a minimal Hello World UI and a button that calls a server handler to demonstrate native capabilities (e.g., list files or open a URL)

Deliverables:

1. Solution and project structure

• One solution named PhotinoBoleroServer.
• One F# console app project named PhotinoBoleroServer.Host (TargetFramework net9.0). This single project contains:
  • Photino host window startup code
  • In‑process ASP.NET Core server configuration
  • Bolero Server app registration and an F# component/module for the UI (no .razor files)
  • Embedded wwwroot static files (index.html, favicon, etc.)

1. NuGet packages to add

• Photino.NET
• Bolero.Server
• Microsoft.AspNetCore.Components.Server
• Microsoft.AspNetCore.StaticFiles (for serving static files)
• Microsoft.Extensions.FileProviders.Embedded (for embedded static files)

1. Exact project file (PhotinoBoleroServer.Host.fsproj)

• Set OutputType to Exe, TargetFramework to net9.0, Nullable enabled.
• Configure single‑file publish properties and trimming safe defaults.
• Mark wwwroot/** as EmbeddedResource for ManifestEmbeddedFileProvider.
• Include the above package references.

1. Source files and full contents

• Program.fs with:

  • Minimal ASP.NET Core WebApplication builder
  • Kestrel configured with ListenLocalhost(0) (OS chooses port)
  • Services: AddServerSideBlazor() and any Bolero Server services required
  • Static file middleware using ManifestEmbeddedFileProvider over embedded wwwroot
  • MapBlazorHub() and MapFallbackToPage/MapFallback serving the embedded index.html
  • Start the web app in background, discover the chosen URL via IServerAddressesFeature
  • Create a PhotinoWindow, Load(url), size and resizable config, WaitForClose(); on close, stop the web app
  • A sample native operation (e.g., list home dir files or open default browser) that can be triggered from the UI

• App.fs (or equivalent) with Bolero components using only F# HTML DSL (no Razor) implementing:

  • Model: Message, HostReply
  • Messages: SayHello, CallServer
  • Update/view functions in Elmish style
  • A page that renders “Hello from Bolero Server + Photino” and a button that calls a server endpoint/method

• wwwroot/index.html embedded layout that loads Blazor Server script (_framework/blazor.server.js) and hosts the #app root

1. Minimal server endpoint or DI service

• Expose a server method (via DI or a minimal endpoint) that the component calls to demonstrate native capability (e.g., read home directory files). Use normal .NET APIs (System.IO, ProcessStartInfo) since the server is in‑process.

1. Commands to build and run

• dotnet restore, dotnet run steps
• Publish commands per OS for single‑file, self‑contained:
  • Windows: -r win-x64 --self-contained true /p:PublishSingleFile=true /p:IncludeNativeLibrariesForSelfExtract=true
  • macOS (Apple Silicon): -r osx-arm64 --self-contained true /p:PublishSingleFile=true
  • Linux: -r linux-x64 --self-contained true /p:PublishSingleFile=true

1. Prerequisites and notes per OS

• Windows: WebView2 runtime for Photino
• macOS: WKWebView is built‑in; note app sandbox/firewall behavior
• Linux: WebKitGTK runtime deps (libwebkit2gtk-4.0 et al.)
• Security: Bind only to loopback, no external interface; use a random port each run

1. Acceptance criteria

• Running dotnet run opens a Photino window that loads the local server URL on loopback
• The UI shows a greeting and two buttons: “Say Hello” and “Ping Native” (or similar)
• Clicking “Ping Native” makes a server call that returns a string (e.g., first N filenames in home dir), which is rendered in the UI
• No .razor files present; UI built with F# Bolero HTML DSL
• Able to publish to a single file for each OS target

Please output:

• The full .fsproj content
• The complete Program.fs and App.fs (or Components.fs) source
• The wwwroot/index.html contents (embedded)
• All dotnet commands to create the solution, add packages, build, run, and publish
• Any additional MSBuild tweaks necessary for embedding wwwroot and for single‑file publishing
• Brief OS‑specific prerequisites section

If any APIs have changed in .NET 9/Bolero, please adapt to the current recommended approach and call it out.

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How to use

• Copy everything above and paste it to Junie.
• Junie should generate the files, code, and commands end‑to‑end.
• Then you can run the dotnet commands exactly as provided by Junie.