如何从PowerShell网站上获取链接的价值？

发布于 2025-02-08 21:24:19 字数 398 浏览 3 评论 0原文

我想从其网站上获得最后一个版本的下载url，我编写了一个脚本，但是它返回了链接名称，我不知道如何获得

$web = Invoke-WebRequest -Uri "https://download.gimp.org/pub/gimp/v2.10/windows/"
$web.Links | Where-Object href -like '*exe' | select -Last 1 | select -expand href

上述代码返回链接名称（GIMP-2.10.32-setup）。 EXE文件）但是我需要值（“ https://download.gimp.org/pub/gimp/v2.10/windows/windows/gimp-2.10.32-setup.exe”）有人可以指导我如何做吗

原文

I want to get download URL of the last version of GIMP from it's site ,I wrote a script but it returns the link name I do not know how to get the value

$web = Invoke-WebRequest -Uri "https://download.gimp.org/pub/gimp/v2.10/windows/"
$web.Links | Where-Object href -like '*exe' | select -Last 1 | select -expand href

the above code returne link name (gimp-2.10.32-setup.exe)
but I need the value ("https://download.gimp.org/pub/gimp/v2.10/windows/gimp-2.10.32-setup.exe")
can someone guide me how to do it

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﹂绝世的画 2025-02-15 21:24:19

您知道呈现的URL是相对的。
只需亲自附加URL的根部。

  $Uri = 'https://download.gimp.org/pub/gimp/v2.10/windows/'
  $web = Invoke-WebRequest -Uri $uri
  $ExeRelLink =  $web.Links | Where-Object href -like '*exe' | select -Last 1 -expand href 
# Here is your download link.
$DownloadLink = $Uri + $ExeRelLink

附加说明

您可以将last和-expand从2个选择语句中组合为1。

You know that the url presented is relative.
Just append the root part of the URL yourself.

  $Uri = 'https://download.gimp.org/pub/gimp/v2.10/windows/'
  $web = Invoke-WebRequest -Uri $uri
  $ExeRelLink =  $web.Links | Where-Object href -like '*exe' | select -Last 1 -expand href 
# Here is your download link.
$DownloadLink = $Uri + $ExeRelLink

Additional Note

You can combine the -Last and -Expand from your 2 select statements into 1.

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如此安好 2025-02-15 21:24:19

有几个下载网站与此GIMP页面完全相同或非常相似的布局，包括许多Apache项目，例如 tomcat 和 activemq 。过去，我写了一些功能来解析这些和其他页面，有趣的是，它也适用于此GIMP页面。我认为值得分享。

Function Extract-FilenameFromWebsite {
    [cmdletbinding()]
    Param(
        [parameter(Position=0,ValueFromPipeline)]
        $Url
    )

    begin{
        $pattern = '<a href.+">(?<FileName>.+?\..+?)</a>\s+(?<Date>\d+-.+?)\s{2,}(?<Size>\d+\w)?'
    }

    process{
        $website = Invoke-WebRequest $Url -UseBasicParsing

        switch -Regex ($website.Content -split '\r?\n'){
            $pattern {
                [PSCustomObject]@{
                    FileName     = $matches.FileName
                    URL          = '{0}{1}' -f $Url,$matches.FileName
                    LastModified = [datetime]$matches.Date
                    Size         = $matches.Size
                }
            }
        }
    }
}

假设该地点通过了一个落后的斜线。如果要考虑任何一个，则可以将此简单的行添加到过程块中。

if($Url -notmatch '/
要获取最新版本，请这样调用此功能
$url = 'https://download.gimp.org/pub/gimp/v2.10/windows/'

$latest = Extract-FilenameFromWebsite -Url $Url | Where-Object filename -like '*exe' |
    Sort-Object LastModified | Select-Object -Last 1

$latest.url

，或者您可以在检索时扩展属性
$url = 'https://download.gimp.org/pub/gimp/v2.10/windows/'

$latesturl = Extract-FilenameFromWebsite -Url $Url | Where-Object filename -like '*exe' |
    Sort-Object LastModified | Select-Object -Last 1 -ExpandProperty URL

$latesturl

){$Url = "$Url/"}

要获取最新版本，请这样调用此功能

，或者您可以在检索时扩展属性

There are several downloads sites with exactly the same or very similar layout to this GIMP page, including many Apache projects like Tomcat and ActiveMQ. I had written a little function to parse these and other pages in the past, and interestingly it also worked for this GIMP page. I thought it was worth sharing as such.

Function Extract-FilenameFromWebsite {
    [cmdletbinding()]
    Param(
        [parameter(Position=0,ValueFromPipeline)]
        $Url
    )

    begin{
        $pattern = '<a href.+">(?<FileName>.+?\..+?)</a>\s+(?<Date>\d+-.+?)\s{2,}(?<Size>\d+\w)?'
    }

    process{
        $website = Invoke-WebRequest $Url -UseBasicParsing

        switch -Regex ($website.Content -split '\r?\n'){
            $pattern {
                [PSCustomObject]@{
                    FileName     = $matches.FileName
                    URL          = '{0}{1}' -f $Url,$matches.FileName
                    LastModified = [datetime]$matches.Date
                    Size         = $matches.Size
                }
            }
        }
    }
}

It's assumed the site passed in has a trailing slash. If you want to account for either, you can add this simple line to the process block.

if($Url -notmatch '/
To get the latest version, call the function like this
$url = 'https://download.gimp.org/pub/gimp/v2.10/windows/'

$latest = Extract-FilenameFromWebsite -Url $Url | Where-Object filename -like '*exe' |
    Sort-Object LastModified | Select-Object -Last 1

$latest.url

Or you could expand the property while retrieving
$url = 'https://download.gimp.org/pub/gimp/v2.10/windows/'

$latesturl = Extract-FilenameFromWebsite -Url $Url | Where-Object filename -like '*exe' |
    Sort-Object LastModified | Select-Object -Last 1 -ExpandProperty URL

$latesturl

){$Url = "$Url/"}

To get the latest version, call the function like this

Or you could expand the property while retrieving

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