How to Configure Windows Sandbox Local Traefik StripPrefixRegex Middleware via XML in Windows 11

Routing dynamic API requests with versioned path prefixes (such as /api/v[0-9]+/) often requires stripping regex path patterns before forwarding requests to backend microservices. Traefik’s StripPrefixRegex middleware removes matched regular expressions dynamically from incoming request URIs. Windows Sandbox in Windows 11 provides a secure, disposable container for validating regex path-stripping workflows safely.

Why Test StripPrefixRegex in Windows Sandbox

Flawed regular expressions can inadvertently strip critical URL paths or cause routing misdirections. Testing inside an isolated Windows Sandbox allows engineers to test regex edge cases against mock backends without exposing local development ports.

Authoring the Windows Sandbox WSB XML

Save the following XML document as TraefikRegexSandbox.wsb on your Windows 11 machine:

<Configuration>
  <VGpu>Default</VGpu>
  <Networking>Default</Networking>
  <MappedFolders>
    <MappedFolder>
      <HostFolder>C:\TraefikRegexLab</HostFolder>
      <SandboxFolder>C:\TraefikRegexLab</SandboxFolder>
      <ReadOnly>true</ReadOnly>
    </MappedFolder>
  </MappedFolders>
  <LogonCommand>
    <Command>powershell.exe -ExecutionPolicy Bypass -NoExit -File C:\TraefikRegexLab\setup-stripregex.ps1</Command>
  </LogonCommand>
</Configuration>

PowerShell Deployment Bootstrapper

Save the bootstrapping script as C:TraefikRegexLabsetup-stripregex.ps1:

Write-Host "Setting up Traefik StripPrefixRegex Lab..." -ForegroundColor Cyan

$Dir = "C:Traefik"
New-Item -ItemType Directory -Force -Path $Dir | Out-Null

$ZipUrl = "https://github.com/traefik/traefik/releases/download/v3.0.0/traefik_v3.0.0_windows_amd64.zip"
Invoke-WebRequest -Uri $ZipUrl -OutFile "$Dir	raefik.zip"
Expand-Archive -Path "$Dir	raefik.zip" -DestinationPath $Dir -Force

$Config = @"
http:
  middlewares:
    regex-strip:
      stripPrefixRegex:
        regex:
          - "^/api/v[0-9]+"
  routers:
    api-router:
      rule: "PathPrefix(`/api/v1`, `/api/v2`)"
      middlewares:
        - "regex-strip"
      service: "api-backend"
  services:
    api-backend:
      loadBalancer:
        servers:
          - url: "http://127.0.0.1:8080"
"@

Set-Content -Path "$Dirdynamic_conf.yml" -Value $Config
Write-Host "Traefik StripPrefixRegex Configured for /api/v[0-9]+." -ForegroundColor Green

Verifying Path Stripping

Launch the sandbox configuration and run curl requests against http://127.0.0.1/api/v1/users. Verify that Traefik strips the version prefix and forwards /users directly to the backend service. Closing the sandbox purges all temporary files cleanly.