使用powershell下载jdk

Question

我正在尝试使用powershell脚本下载java jdk，如下所示。

http://poshcode.org/4224

。在这里，正如作者所指定的，如果我改变出现最新jdk的源url，即，

http://download.oracle.com/otn-pub/java/jdk/8u5-b13/jdk-8u5-windows-x64.exe

没有加载内容，只有大约6KB的内容被下载。我有一个疑问，powershell脚本的下载限制是不是只有6KB？

代码如下：

$source = "http://download.oracle.com/otn-pub/java/jdk/8u5-b13/jdk-8u5-windows-i586.exe"
      $destination = "C:\Download\Java\jdk-7u60-windows-i586.exe"
      $client = new-object System.Net.WebClient
      $client.DownloadFile($source, $destination)

Answer 1

在检查oracle站点上的会话时，下面的cookie引起了注意：oraclelicense=accept-securebackup-cookie。考虑到这一点，您可以运行以下代码：

$source = "http://download.oracle.com/otn-pub/java/jdk/8u5-b13/jdk-8u5-windows-i586.exe"
$destination = "C:\Download\Java\jdk-7u60-windows-i586.exe"
$client = new-object System.Net.WebClient 
$cookie = "oraclelicense=accept-securebackup-cookie"
$client.Headers.Add([System.Net.HttpRequestHeader]::Cookie, $cookie) 
$client.downloadFile($source, $destination)

Answer 2

在需要将JDK作为依赖项的平台安装程序需要此脚本后：

<# Config #>
$DownloadPageUri = 'https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html';
$JavaVersion = '8u201';

<# Build the WebSession containing the proper cookie 
   needed to auto-accept the license agreement. #>
$Cookie=New-Object -TypeName System.Net.Cookie; 
$Cookie.Domain='oracle.com';
$Cookie.Name='oraclelicense';
$Cookie.Value='accept-securebackup-cookie'; 
$Session= `
   New-Object -TypeName Microsoft.PowerShell.Commands.WebRequestSession;
$Session.Cookies.Add($Cookie);

<# Fetch the proper Uri and filename from the webpage. #>
$JdkUri = (Invoke-WebRequest -Uri $DownloadPageUri -WebSession $Session -UseBasicParsing).RawContent `
    -split "`n" | ForEach-Object { `
        If ($_ -imatch '"filepath":"(https://[^"]+)"' { `
            $Matches[1] `
        } `
    } | Where-Object { `
        $_ -like "*-$JavaVersion-windows-x64.exe" `
    }[0];
If ($JdkUri -imatch '/([^/]+)$') { 
    $JdkFileName=$Matches[1];
}

<# Use a try/catch to catch the 302 moved temporarily 
   exception generated by oracle from the absance of
   AuthParam in the original URL, piping the exception's
   AbsoluteUri to a new request with AuthParam returned
   from Oracle's servers.  (NEW!) #>

try { 
    Invoke-WebRequest -Uri $JdkUri -WebSession $Session -OutFile "$JdkFileName"
} catch { 
    $authparam_uri = $_.Exception.Response.Headers.Location.AbsoluteUri;
    Invoke-WebRequest -Uri $authparam_uri -WebSession $Session -OutFile "$JdkFileName"
} 

在PowerShell 6.0中工作(你好，2019!)需要对正则表达式和-imatch行扫描发生的方式进行较小的修正。遵循302重定向的变通方法位于此处：https://github.com/PowerShell/PowerShell/issues/2896 (302重定向变通变通方法由fcabralpacheco使Oracle下载再次工作！)

本方案自动下载Windows x64版8u201。

Answer 3

由于接受的评论不再起作用，我无法发表评论，我将把我的方法留在这里。我修改了@steve-coleman的答案，让它扫描页面上以https而不是http开头的下载链接。此外，我还需要修改$Response，使其具有-UseBasicParsing标志，因为我使用的是无头Windows Server。总而言之，我使用的脚本是：

$DownloadPageUri = 'http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html'
$JavaVersion = '8u192'

$Response = Invoke-WebRequest -Uri $DownloadPageUri -UseBasicParsing

$JreUri = @($Response.RawContent -split "`n" | ForEach-Object {If ($_ -imatch '"filepath":"(https://[^"]+)"') {$Matches[1]}} | Where-Object {$_ -like "*-$JavaVersion-windows-x64.tar.gz"})
If (-Not $JreUri.Count -eq 1) {
    throw ('Expected to retrieve only one URI but got {0}' -f $JreUri.Count)
}

If ($JreUri[0] -imatch '/([^/]+)$') {
    $JreFileName = $Matches[1]
}
$JreFileName = 'jre-windows-x64.tar.gz'

If (-Not (Test-Path -Path "$PSScriptRoot\$JreFileName") -Or -Not (Test-Path -Path "$PSScriptRoot\Java-$JavaVersion.tag")) {
    $Cookie  = New-Object -TypeName System.Net.Cookie
    $Cookie.Domain = 'oracle.com'
    $Cookie.Name   = 'oraclelicense'
    $Cookie.Value  = 'accept-securebackup-cookie'
    $Session = New-Object -TypeName Microsoft.PowerShell.Commands.WebRequestSession
    $Session.Cookies.Add($Cookie)
    Invoke-WebRequest -Uri $JreUri[0] -WebSession $Session -OutFile "$PSScriptRoot\$JreFileName"
    New-Item -Path "$PSScriptRoot\Java-$JavaVersion.tag" -ItemType File | Out-Null
}

像往常一样，YMMV，特别是如果甲骨文改变了他们的网站。