feat: SwitchRegexServer ( Fixes #11 )

Author: StartAutomating

Servers/SwitchRegexServer.ps1

@@ -0,0 +1,74 @@
+<#
+.SYNOPSIS
+    Switch -RegEx Server
+.DESCRIPTION
+    A simple server implemented in a single switch -regex.
+
+    Any match can provide results.
+.EXAMPLE
+    ./SwitchRegexServer.ps1
+#>
+param(
+# The rootUrl of the server.  By default, a random loopback address.
+[string]$RootUrl=
+    "http://127.0.0.1:$(Get-Random -Minimum 4200 -Maximum 42000)/",
+
+[Collections.IDictionary]
+$Dictionary = [Ordered]@{
+    "/" = @{ContentType='text/html';Content='<h1>Hello World</h1>'}
+}
+)
+
+$httpListener = [Net.HttpListener]::new()
+$httpListener.Prefixes.Add($RootUrl)
+Write-Warning "Listening on $RootUrl $($httpListener.Start())"
+
+$io = [Ordered]@{ # Pack our job input into an IO dictionary
+    HttpListener = $httpListener ;
+}
+
+# Our server is a thread job
+Start-ThreadJob -ScriptBlock {param([Collections.IDictionary]$io)
+    $psvariable = $ExecutionContext.SessionState.PSVariable
+    foreach ($key in $io.Keys) { # First, let's unpack.
+        if ($io[$key] -is [PSVariable]) { $psvariable.set($io[$key]) }
+        else { $psvariable.set($key, $io[$key]) }
+    }
+    
+    # Listen for the next request
+    :nextRequest while ($httpListener.IsListening) {     
+        $getContext = $httpListener.GetContextAsync()
+        while (-not $getContext.Wait(17)) { }
+        $time = [DateTime]::Now
+        $request, $reply =
+            $getContext.Result.Request, $getContext.Result.Response
+        $result = $null
+        $result =
+            switch -regex ($request.Url.LocalPath) {
+                '/' {
+                    "<h1>Home Sweet Home</h1>"                    
+                }
+                '/Hello/?' {
+                    "<h1>Hello World</h1>"
+                }
+                '/(?<d1>[\d\.]+)x(?<d2>[\d\.]+)/?' {
+                    ($matches.d1 -as [double]) * ($matches.d2 -as [double])
+                }
+                default {
+                    $timeToRespond = [DateTime]::Now - $time
+                    "$($request.HttpMethod) $($request.Url) $($timeToRespond)"
+                }
+            }
+        if ($result) {
+            $reply.Close($OutputEncoding.GetBytes("$result"), $false)
+        } else {
+            $reply.StatusCode = 404
+            $reply.Close()
+        }
+    }            
+} -ThrottleLimit 100 -ArgumentList $IO -Name "$RootUrl" | # Output our job,
+    Add-Member -NotePropertyMembers @{ # but attach a few properties first:
+        HttpListener=$httpListener # * The listener (so we can stop it)
+        IO=$IO # * The IO (so we can change it)
+        Url="$RootUrl" # The URL (so we can easily access it).
+    } -Force -PassThru # Pass all of that thru and return it to you.