network.ps1
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#using namespace System.Collections.Generic ### Includes: . "$PSScriptRoot\cache.ps1" ### Variables: $network_stat = [pscustomobject]@{ ReadFromCacheCount = 0 InvokeWebRequestCount = 0 } ### Functions: function Combine-Url { [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [string[]]$Segments, [switch]$KeepTrailingSlash ) # Write-Verbose "Combine-Url: args[$($Segments.Length)]: [$($Segments -join " ; ")]" $trailing_slash = if ($KeepTrailingSlash -and ($Segments[-1].EndsWith('/'))) { '/' } else { '' } $result = (@($Segments | % { "$_".Trim().Trim('/') } | ? { $_ }) -join '/') + $trailing_slash return $result } function Get-UrlContent { [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [string]$Url, [ValidateSet('JSON', 'Text', IgnoreCase = $true)] [string]$ResponseType = 'JSON', [hashtable]$Headers = @{ }, [System.Collections.Specialized.OrderedDictionary]$Query = @{ } # [hashtable]$Query = @{ } # [switch]$Cache ) Write-Verbose "Get-UrlContent: begin" Write-Verbose "Get-UrlContent: ErrorActionPreference: '$ErrorActionPreference'" Write-Verbose "Get-UrlContent: Url: '$Url'" Write-Verbose "Get-UrlContent: ResponseType: '$ResponseType'" # Write-Verbose "Get-UrlContent: Query: '$Query'" $config = Get-Config $cache_enabled = Parse-Bool $config.Cache.Enabled Write-Verbose "Get-UrlContent: cache_enabled: $cache_enabled" $ext = if ($ResponseType -eq 'JSON') { 'json' } elseif ($ResponseType -eq 'Text') { 'txt' } else { '' } $query_str = if ($Query -and $Query.Count) { '?' + (@($Query.GetEnumerator() | ? { $_.Value } | % { "$($_.Key)=$($_.Value)" }) -join '&') } else { '' } Write-Verbose "Get-UrlContent: query_str: '$query_str'" $full_url = $Url + $query_str Write-Verbose "Get-UrlContent: full URL: '$full_url'" $cache_key = $full_url if ($cache_enabled) { $cache_result = Read-TextFromCache -Key $cache_key -FileExtension $ext if ($cache_result) { Write-Verbose "Get-UrlContent: result obtained from cache" $network_stat.ReadFromCacheCount++ if ($ResponseType -eq 'JSON') { $result = ConvertFrom-Json -InputObject $cache_result $props = @(Get-Member -InputObject $result -MemberType Properties | select -ExpandProperty Name) # if ($result.count -and $result.value) { if (('count' -in $props) -and ('value' -in $props)) { Write-Verbose "result(1): [$result]" return $result.value } Write-Verbose "result(2): [$result]" return $result } elseif ($ResponseType -eq 'Text') { Write-Verbose "result(3): [$cache_result]" return $cache_result } else { throw "Invalid response type '$ResponseType'" } } else { Write-Verbose "Get-UrlContent: result not found in cache" } } $params = @{ } # Get-CallerPreference -Cmdlet $PSCmdlet -SessionState $ExecutionContext.SessionState -ErrorAction 'SilentlyContinue' # Write-Host "`r`n*** Function Name:" -ForegroundColor 'White' # try { # Write-Host ("Parameters:`r`n" + (New-Object "PSObject" -Property $PSBoundParameters | fl * | Out-String).Trim()) -ForegroundColor 'Cyan' Write-Verbose "Get-UrlContent: invoke web request to get result" ### ���������� -ErrorAction, ������� � try-catch: $response = Invoke-WebRequest -Uri $full_url -Headers $Headers @params $network_stat.InvokeWebRequestCount++ if ($cache_enabled) { Save-TextToCache -Key $cache_key -Text $response.Content -FileExtension $ext } if ($ResponseType -eq 'JSON') { $result = ConvertFrom-Json -InputObject $response.Content $props = @(Get-Member -InputObject $result -MemberType Properties | select -ExpandProperty Name) # if ($result.count -and $result.value) { if (('count' -in $props) -and ('value' -in $props)) { return $result.value } return $result } elseif ($ResponseType -eq 'Text') { return $response.Content } else { throw "Invalid response type '$ResponseType'" } # } catch { # if ($ErrorActionPreference -eq 'Stop') { # throw # } elseif ($ErrorActionPreference -ne 'SilentlyContinue') { # Write-Host ($_ | fl * -Force | Out-String).Trim() -ForegroundColor 'Red' # Write-Host ("Parameters:`r`n" + (New-Object "PSObject" -Property $PSBoundParameters | fl * | Out-String).Trim()) -ForegroundColor 'Cyan' # } # } } function Show-NetworkStat() { Write-Host "`r`n=== NETWORK STATISTICS ===" Write-Host ($network_stat | fl * | Out-String).Trim() } |