Types/CommandInfo/get_CacheControl.ps1
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<# .SYNOPSIS Gets a Command's Cache Control .DESCRIPTION Gets a Command's Cache Control header (if present). Any [Reflection.AssemblyMetaData] whose key is named `*Cache*Control*` will be counted as a cache-control value. All values will be joined with commas and cached. .NOTES Cache Control allows any script to easily specify how long it's results should be cached. #> if (-not $this.'.CacheControl') { $resolvedScriptBlock = if ($this -is [Management.Automation.AliasInfo]) { $resolveCommand = $this do { $resolveCommand = $this.ResolvedCommand } while ($resolveCommand -and $resolveCommand.ResolvedCommand) if ($resolveCommand) { $resolveCommand.ScriptBlock } } elseif ($this.ScriptBlock) { $this.ScriptBlock } if (-not $resolvedScriptBlock) { return } $cacheControlValues = foreach ($attr in $resolvedScriptBlock.Attributes) { if ($attr -isnot [Reflection.AssemblyMetadata]) { continue } if ($attr.Key -notmatch 'Cache.?Control') { continue } $attr.Value } Add-Member -InputObject $this -MemberType NoteProperty -Name '.CacheControl' -Value ( $cacheControlValues -join ',' ) -Force } $This.'.CacheControl' |