Client side fingerprinting compatibility in .NET 10

[pkellar]

I've recently updated a project to .NET 10. I also wanted to use the new Client-side fingerprinting that is now offered with .NET 10. When I implement this by adding <OverrideHtmlAssetPlaceholders>true</OverrideHtmlAssetPlaceholders> to my csproj file, my application correctly uses the fingerprinted dotnet[fingerPrint].js file. However, the web worker will still call for the old dotnet.js file without this fingerprint. This is causing a 404 error since the non fingerprinted file no longer exists. Is there a way I can make the web worker compatible with my client side fingerprinting?

[Tewr]

I would have to do a bit of digging to see where to find the fingerprint, I guess. The file was fingerprinted in earlier versions at some point...

[Tewr]

@pkellar Seems like I would have to read the importmap generated by the framework and pass it to the worker, and us it as a filter in fetch and import calls.

<script type="importmap">{
  "imports": {
    "./_content/BlazorWorker.Demo.SharedPages/JsDirectExample.js": "./_content/BlazorWorker.Demo.SharedPages/JsDirectExample.71iaj2vsgu.js",
   (...)
    "./_content/Tewr.BlazorWorker.Extensions.JSRuntime/BlazorWorkerJSRuntime.js": "./_content/Tewr.BlazorWorker.Extensions.JSRuntime/BlazorWorkerJSRuntime.muy78cxwk4.js",
    "./_framework/blazor.webassembly.js": "./_framework/blazor.webassembly.66stpp682q.js",
    "./_framework/dotnet.js": "./_framework/dotnet.f4j3c5sfo0.js",
    "./_framework/dotnet.native.js": "./_framework/dotnet.native.xanz2e7ksm.js",
    "./_framework/dotnet.runtime.js": "./_framework/dotnet.runtime.o0qy896u8v.js"
  },
  "scopes": {},
  "integrity": { (...)
  }
}</script>

[Tewr]

@pkellar could you try out the code in the PR #131 and see if it works for you ? I can't reproduce the 404 problem. Is that when you publish/trim? but at least in the pr the dotnet.[fingerprint].js is being loaded instead of dotnet.js whenever you set UseFingerprinting = true in the options like this

[pkellar]

@Tewr It looks like it fixed the issue with being able to load the dotnet.[fingerprint].js file, but for some reason I am getting this error when I run importLocalScripts when I have Fingerprinting enabled:

TypeError: Cannot read properties of undefined (reading 'startsWith')

I'm assuming I'm getting this error because of the change made to that function in BlazorWorker.js, or am I doing something wrong?

[Tewr]

importLocalScripts was not robust enough. I committed a version that should be better.

[pkellar]

That looks like everything was working for me with that most recent change! Thanks!