Public/Start-HealthZListener.ps1
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function Start-HealthZListener { <# .SYNOPSIS Starts a PSHealthZ listener instance. .DESCRIPTION Starts a PSHealthZ listener instance. .PARAMETER Port The port the listener will listen on. .PARAMETER Path The URl path to listen on (e.g., '/health'). .PARAMETER Token The authentication token to secure the endpoint with. If specified, the authentication scheme will be set to anonymous. .PARAMETER LogDir The log directory the listener will write to. A file with the listener instance Id will be created. .PARAMETER UseSSL Switch to indicate that a SSL certificate will be used. If specified the certificate thumbprint MUST be provided via the CertificateThumbprint parameter. .PARAMETER CertificateThumbprint The thumbprint of the certificate to use when using SSL. This parameter MUST be provided if using SSL. The certificate MUST be in the LocalMachine\My certificate store. .PARAMETER PassThru Return the newly created listener object. .EXAMPLE Start-HealthZListener Start a new PSHealthZ listener will default values. .EXAMPLE Start-HealthZListener -Port 8888 -Path myhealthendpoint Start a new PSHealthZ listener on a custom port and path. .EXAMPLE $token = New-HealthZToken $listener = Start-HealthZListener -Token $token -PassThru $testResults = Invoke-RestMethod -Uri "http://localhost:1938/health?token=$token?module=*" Setup the listener with token authentication and execute all available tests. .EXAMPLE $thumbprint = '7D85481FE7D35AC4306AF2C4281879B73701D001' $listener = Start-HealthZListener -Port 8443 -UseSSL -CertificateThumbprint $thumbprint -PassThru Start a new PSHealthZ listener using SSL on port 8443. #> [OutputType([pscustomobject])] [cmdletbinding(SupportsShouldProcess)] param( [int]$Port = 1938, [string]$Path = 'health/', [string]$Token, [string]$LogDir = (Join-Path -Path $env:temp -ChildPath 'PSHealthZ'), [switch]$UseSSL, [ValidatePattern("^[0-9a-f]{40}$")] [string]$CertificateThumbprint, [switch]$PassThru ) begin { # Validate that desired port is not already in use if (Get-NetTCPConnection -State Listen -LocalPort $Port -ErrorAction SilentlyContinue) { throw "Port $Port is already in use!" return } # Always use anonymous authentication. # If token provided, we'll validate at that level $Auth = [System.Net.AuthenticationSchemes]::Anonymous } process { # Make sure path always ends with '/' if (($Path.Length -gt 0) -and (-not $Path.EndsWith('/'))) { $Path += '/' } # HTTP or HTTPS $protocol = 'http' if ($PSBoundParameters.ContainsKey('UseSSL')) { if (-not $PSBoundParameters.ContainsKey('CertificateThumbprint')) { throw 'A certificate thumbprint MUST be provided when using SSL.' } $protocol = 'https' } # Determine final endpoint URL if ($Path -eq '/') { $endpoint = "$($protocol)://*:$Port/" } else { $endpoint = "$($protocol)://*:$Port/$Path" } if ($PSCmdlet.ShouldProcess($endpoint, 'Start PSHealthZ listener')) { # Create log directory if (-not (Test-Path -Path $LogDir)) { New-Item -Path $LogDir -ItemType Directory -Force -Verbose:$false | Out-Null } $listenerScript = { #[cmdletbinding(DefaultParameterSetName = 'auth')] [cmdletbinding()] param( [parameter(Mandatory)] [int]$Port, [parameter(Mandatory)] [string]$Path, [parameter(Mandatory)] [string]$Endpoint, [System.Net.AuthenticationSchemes]$Auth, [string]$Token, [bool]$UseSSL, [string]$CertificateThumbprint, [parameter(Mandatory)] [string]$LogDir, [parameter(Mandatory)] [guid]$InstanceId ) $VerbosePreference = 'Continue' $listener = New-Object System.Net.HttpListener $requestListener = { [cmdletbinding()] param($result) [System.Net.HttpListener]$listener = $result.AsyncState; # Call EndGetContext to complete the asynchronous operation. $context = $listener.EndGetContext($result); # Hand off the Context to the handler, it is in charge of responding. & $requestProcessor $context $listener.BeginGetContext((New-ScriptBlockCallback -Callback $requestListener), $listener) } $requestProcessor = { [cmdletbinding()] param( $Context ) $request = $Context.Request Write-Log -Message "[Listener] Received request from $($context.Request.RemoteEndPoint)" Write-Log -Message "Request details:`n$($request | Format-List -Property * | Out-String)" $buffer = $null $cmdResponse = [string]::Empty $response = $context.Response $statusCode = [System.Net.HttpStatusCode]::OK $continue = $false # Authorize request if using tokens if ($null -ne $Token -and $Token -ne [string]::Empty) { Write-Log -Message 'Inspecting token...' # Check for token in headers or query string if ($request.Headers['token'] -or ($request.QueryString.HasKeys() -and $request.QueryString.Item('token'))) { # Validate token if (Validate-Token -Request $request -Token $Token) { Write-Log -Message 'Token matches' $continue = $true } else { $msg = 'Token provided does not match server' Write-Log -Message $msg $cmdResponse = $msg $statusCode = [System.Net.HttpStatusCode]::Unauthorized } } else { $msg = 'Authorization token not provided in request. Sending 403.' Write-Log -Message $msg $cmdResponse = $msg $statusCode = [System.Net.HttpStatusCode]::Unauthorized } } else { $statusCode = [System.Net.HttpStatusCode]::OK $continue = $true } # Requested test to execute if ($continue) { $test = $null $module = $null if ($request.QueryString.HasKeys()) { $test = $request.QueryString.Item('test') $module = $request.QueryString.Item('module') } try { $invokeOVFParams = @{} if ($test) { $invokeOVFParams.Test = $test } if ($module) { $invokeOVFParams.Module = $module } if ($test -or $Module) { Write-Log -Message "Requesting test [$test] in module [$Module]" } else { Write-Log -Message 'No specific test requested. Listing all available tests.' } $commandOutput = Invoke-Ovf @invokeOVFParams } catch { $commandOutput = $_ | ConvertTo-Json $statusCode = [System.Net.HttpStatusCode]::InternalServerError } $cmdResponse = $commandOutput | ConvertTo-Json } # Setup response $response.StatusCode = $statusCode $response.ContentType = 'application/json' $buffer = [System.Text.Encoding]::UTF8.GetBytes($cmdResponse) $response.ContentLength64 = $buffer.Length Write-Log -Message "Response: $($response | Format-List -Property * | Out-String)" # Return response $output = $response.OutputStream $output.Write($buffer,0,$buffer.Length) $output.Close() $response.Close() } # Run a scriptblock from an .NET async callback via events # Thanks to http://poshcode.org/1382 function New-ScriptBlockCallback { [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseShouldProcessForStateChangingFunctions', '')] param( [parameter(Mandatory)] [ValidateNotNullOrEmpty()] [scriptblock]$Callback ) # Is this type already defined? if (-not ( 'CallbackEventBridge' -as [type])) { Add-Type @' using System; public sealed class CallbackEventBridge { public event AsyncCallback CallbackComplete = delegate { }; private CallbackEventBridge() {} private void CallbackInternal(IAsyncResult result) { CallbackComplete(result); } public AsyncCallback Callback { get { return new AsyncCallback(CallbackInternal); } } public static CallbackEventBridge Create() { return new CallbackEventBridge(); } } '@ } $bridge = [callbackeventbridge]::create() Register-ObjectEvent -InputObject $bridge -EventName callbackcomplete -Action $Callback -MessageData $args > $null $bridge.Callback } # Start HTTP(s) listener function Start-Server { [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseShouldProcessForStateChangingFunctions', '')] [cmdletbinding()] param() try { Write-Log -Message "Prefix: $Endpoint" $listener.Prefixes.Add($Endpoint) $listener.AuthenticationSchemes = $Auth if ($null -ne $Token) { Write-Log -Message "Starting HTTP(s) server listening at [$Endpoint] with [token-based] authentication..." } else { Write-Log -Message "Starting HTTP(s) server listening at ]$Endpoint] with [$Auth] authentication..." } $listener.Start() if ($UseSSL) { Register-SSL } # Register the request listener scriptblock as the async callback $listener.BeginGetContext((New-ScriptBlockCallback -Callback $requestListener), $listener) | Out-Null } catch { throw 'There were problems setting up the HTTP(s) listener.' Stop-Server } } # Stop HTTP(s) listener function Stop-Server { [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseShouldProcessForStateChangingFunctions', '')] [cmdletbinding()] param() Write-Log -Message 'Finished listening for requests. Shutting down HTTP server.' # Remove SSL Binding if ($UseSSL) { $ipPort = "0.0.0.0:$Port" Invoke-ConsoleCommand -Target $ipPort -Action 'removing SSL certificate binding' -ScriptBlock { netsh http delete sslcert ipPort="$ipPort" } #netsh http delete sslcert ipport="0.0.0.0:$Port" } $listener.Close() exit 0 } # Bind SSL cert to listener port function Register-SSL { [cmdletbinding()] param() begin { $cert = Get-ChildItem -Path 'Cert:\LocalMachine\My' -Recurse | Where-Object { $_.Thumbprint -eq $CertificateThumbprint } if (-not $cert) { throw "Unable to find certificate with thumbprint [$CertificateThumbprint]" } } process { try { $ipPort = "0.0.0.0:$Port" # Remove Previous SSL Bindings Write-Log -Message "Removing any previous SSL bindings on [$ipPort]" Invoke-ConsoleCommand -Target $ipPort -Action 'removing SSL certificate binding' -ScriptBlock { netsh http delete sslcert ipPort="$ipPort" } #netsh http delete sslcert ipport="$ipPort" # Add SSL Certificate Write-Log -Message "Binding certificate [$CertificateThumbprint] to [$ipPort]" Invoke-ConsoleCommand -Target $ipPort -Action 'creating SSL certificate binding' -ScriptBlock { netsh http add sslcert ipport="$ipPort" certhash="$CertificateThumbprint" appid="{$InstanceId}" } #netsh http add sslcert ipport="$ipPort" certhash="$CertificateThumbprint" appid="{$InstanceId}" } catch { $msg = "Unable to bind SSL Certificate to port [$Port]. $($_.Exception.Message)" Write-Log -Message $msg throw $msg } } } # Invoke a console command and capture exit code function Invoke-ConsoleCommand { [CmdletBinding(SupportsShouldProcess)] param( [Parameter(Mandatory)] [string]$Target, [Parameter(Mandatory)] [string]$Action, [Parameter(Mandatory)] [scriptblock]$ScriptBlock ) Set-StrictMode -Version 'Latest' if(-not $PSCmdlet.ShouldProcess($Target, $Action)){ return } $output = Invoke-Command -ScriptBlock $ScriptBlock if ($LASTEXITCODE) { $output = $output -join [Environment]::NewLine Write-Error ('Failed action ''{0}'' on target ''{1}'' (exit code {2}): {3}' -f $Action,$Target,$LASTEXITCODE,$output) } else { $output | Where-Object { $_ -ne $null } | Write-Verbose } } # Execute specified OVF tests and return results function Invoke-Ovf { [cmdletbinding()] param( [string]$Test = '*', [string]$Module = '*' ) $ovfModuleNames = @('OperationValidation', 'Microsoft.PowerShell.Operation.Validation') # Track duration of testing $sw = [System.Diagnostics.Stopwatch]::StartNew() Import-Module -Name Microsoft.PowerShell.Operation.Validation -Verbose:$false -ErrorAction Stop $resp = [ordered]@{ success = $true time = (get-date).ToUniversalTime().ToString('u') timeElapsedMS = $null message = '' availableTests = @() testResults = @() failedTests = @() } try { # Get OVF tests on the system $filter = { $leaf = Split-Path -Path $_.ModuleName -Leaf if ($leaf -as [Version]) { $moduleName = Split-Path -Path (Split-Path -Path $_.ModuleName -Parent) -Leaf } else { $moduleName = $leaf } $moduleName -notin $ovfModuleNames } $ovfTests = OperationValidation\Get-OperationValidation -ModuleName $Module -Verbose:$false -ErrorAction SilentlyContinue | Where-Object $filter | Where-Object {$_.Name -like $Test} $resp.availableTests = $ovfTests | ForEach-Object { $r = [ordered]@{ name = $_.Name } $leaf = Split-Path -Path $_.ModuleName -Leaf if ($leaf -as [Version]) { $r.module = Split-Path -Path (Split-Path -Path $_.ModuleName -Parent) -Leaf } else { $r.module = $leaf } [pscustomobject]$r } if ($PSBoundParameters.ContainsKey('Test') -or $PSBoundParameters.ContainsKey('Module')) { # Execute the Pester/OVF tests Import-Module -Name Pester -Verbose:$false -ErrorAction Stop Write-Log -Message "Executing tests: `n$($ovfTests.Name)" $ovfResults = $ovfTests | Where-Object Name -like $Test | OperationValidation\Invoke-OperationValidation -Verbose:$false -ErrorAction SilentlyContinue $resp.success = @($ovfResults | Where-Object Result -like 'Failed').Count -eq 0 # All test results $resp.testResults = $ovfResults | ForEach-Object { [pscustomobject]@{ test = $_.RawResult.Name module = $_.Module passed = $_.RawResult.Passed result = $_.Result describe = $_.RawResult.Describe context = $_.RawResult.Context file = $_.FileName message = $_.RawResult.FailureMessage duration = $_.RawResult.Time.ToString() } } # Only failed test results $resp.failedTests = $ovfResults | Where-Object {$_.RawResult.Passed -eq $false } | ForEach-Object { [pscustomobject]@{ test = $_.RawResult.Name module = $_.Module passed = $_.RawResult.Passed result = $_.Result describe = $_.RawResult.Describe context = $_.RawResult.Context file = $_.FileName message = $_.RawResult.FailureMessage duration = $_.RawResult.Time.ToString() } } } else { $resp.message = "PSHealthZ responds but does not execute tests without being told to. Add query parameter '?test=<testname>' and/or '?module=<modulename>' to execute a specific tests. Available tests are listed in the 'availableTests' property of this response. Use '?test=*' or '?module=*' to execute all available tests regardless of module. Specific tests can be executed by filtering with the 'test' and 'module' query parameters." $resp.success = $true } } catch { $resp.success = $false $resp.message = $_ } # Add time it took to execute test(s) $sw.Stop() $resp.timeElapsedMS = $sw.Elapsed.TotalMilliseconds $o = [pscustomobject]$resp Write-Log -Message "Test results:`n$($o | Format-List -Property * | Out-String)" return $o } # Validate provided token from HTTP request against what # is configured in the listener function Validate-Token { param( $Request, $Token ) # Token could be in headers or query string if ($Request.Headers['token']) { $providedToken = $Request.Headers['token'] } else { $providedToken = $Request.QueryString.Item('token') } return ($providedToken -ceq $Token) } function Write-Log { [cmdletbinding()] param( [object]$Message ) $logsToKeep = 5 $maxLogSize = 1 $now = (Get-Date).ToString('yyyy-MM-dd hh:mm:ss') $log = Join-Path -Path $LogDir -ChildPath "$($InstanceId).log" # Roll log if necessary if (Test-Path -Path $log) { if ((($file = Get-Item -Path $log) -and ($file.Length/1mb) -gt $maxLogSize)) { # Remove the last item if it would go over the limit if (Test-Path -Path "$log.$logsToKeep") { Remove-Item -Path "$log.$logsToKeep" } foreach ($i in $($logsToKeep)..1) { if (Test-path -Path "$log.$($i-1)") { Move-Item -Path "$log.$($i-1)" -Destination "$log.$i" } } Move-Item -Path $log -Destination "$log.$i" New-Item -Path $log -Type File -Force | Out-Null } } Write-Verbose -Message $Message "[$now] $Message" | Out-File -FilePath $log -Encoding utf8 -Append -Force } Start-Server while($true) { Start-Sleep -Milliseconds 100 } } # Start the listener $instanceId = New-Guid $jobParams = @{ Name = "PSHealthZHTTPListerner_$InstanceId" ScriptBlock = $listenerScript ArgumentList = @($Port, $Path, $endpoint, $Auth, $Token, $PSBoundParameters.ContainsKey('UseSSL'), $CertificateThumbprint, $LogDir, $instanceId) } $job = Start-Job @jobParams if ($null -ne $Token) { Write-Verbose -Message "PSHealthZ HTTP listener starting at [$endpoint] with [token-based] authentication" } else { Write-Verbose -Message "PSHealthZ HTTP listener starting at [$endpoint] with [$Auth] authentication" } Write-Verbose -Message "Job Id: $($job.Id)" Write-Verbose -Message "To stop the listener run: Stop-HealthZListener -Id $($job.Id)" # Track the listener $listenerTracker = @{ jobId = $job.Id port = $Port path = $Path uri = $endpoint ssl = $PSBoundParameters.ContainsKey('UseSSL') certificateThumbprint = $CertificateThumbprint auth = $Auth log = (Join-Path -Path $LogDir -ChildPath "$($instanceId).log") instanceId = $instanceId } if ($PSBoundParameters.ContainsKey('Token')) { $listenerTracker.token = $Token } $script:httpListeners.Add($job.Id, $listenerTracker) # Return listener object if told to if ($PSBoundParameters.ContainsKey('PassThru')) { return Get-HealthZListener -Id $job.Id } } } } |