Created
December 7, 2014 02:04
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指定したUrlのHTMLドキュメントからTextノードのみを抽出するPowershell function
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<# | |
.Synopsis | |
WebページからTextを取得 | |
.DESCRIPTION | |
指定したUrlのHTMLドキュメントからTextノードのみを抽出します。 | |
.EXAMPLE | |
Get-WebText "http://example.com" | |
.EXAMPLE | |
"http://example1.com","http://example2.com","http://example3.com" | Get-WebText | |
#> | |
function Get-WebText | |
{ | |
[CmdletBinding()] | |
Param( | |
# Url | |
[Parameter(Mandatory=$true, | |
ValueFromPipeline=$true, | |
Position=0)] | |
[string[]] | |
$InputUrl | |
) | |
Begin | |
{ | |
# HTMLDocumentのノードを再帰的に辿り、Textノードのみを返却する | |
function Get-Descendants | |
{ | |
Param([object]$nodes) | |
if(-not $nodes.hasChildNodes){ return } | |
if($nodes.nodeName -eq "script"){return} | |
foreach($child in $nodes.ChildNodes) | |
{ | |
if($child.nodeName -eq "#text") | |
{ | |
if(-not[String]::IsNullOrWhiteSpace($child.nodeValue)) | |
{ | |
return $child.nodeValue | |
} | |
} | |
Get-Descendants $child | |
} | |
} | |
} | |
Process | |
{ | |
foreach($Url in $InputUrl) | |
{ | |
Invoke-WebRequest $Url | % { Get-Descendants $_.ParsedHtml } | |
} | |
} | |
End {} | |
} |
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