Azure download.ps1

Question

当我添加一个web角色到我的node.js项目，一个下载。生成Ps1。这是干什么用的?我在任何地方都找不到关于它的任何文档。

我可以看到脚本的作用，我只是不知道它何时被调用或为什么被调用。文件内容如下:

$runtimeUrl = $args[0]
$overrideUrl = $args[1]
$current = [string] (Get-Location -PSProvider FileSystem)
$client = New-Object System.Net.WebClient
function downloadWithRetry {
    param([string]$url, [string]$dest, [int]$retry) 
    Write-Host
    Write-Host "Attempt: $retry"
    Write-Host
    trap {
        Write-Host $_.Exception.ToString()
        if ($retry -lt 5) {
            $retry=$retry+1
            Write-Host
            Write-Host "Waiting 5 seconds and retrying"
            Write-Host
            Start-Sleep -s 5
            downloadWithRetry $url $dest $retry $client
        }
        else {
            Write-Host "Download failed"
            throw "Max number of retries downloading [5] exceeded"  
        }
    }
    $client.downloadfile($url, $dest)
}
function download($url, $dest) {
    Write-Host "Downloading $url"
    downloadWithRetry $url $dest 1
}
function copyOnVerify($file, $output) {
  Write-Host "Verifying $file"
  $verify = Get-AuthenticodeSignature $file
  Out-Host -InputObject $verify
  if ($verify.Status -ne "Valid") {
     throw "Invalid signature for runtime package $file"
  }
  else {
    mv $file $output
  }
}
if ($overrideUrl) {
    Write-Host "Using override url: $overrideUrl"
    $url = $overrideUrl
}
else {
    $url = $runtimeUrl
}
foreach($singleUrl in $url -split ";") 
{
    $suffix = Get-Random
    $downloaddir = $current + "sandbox" + $suffix
    mkdir $downloaddir
    $dest = $downloaddir + "sandbox.exe"
    download $singleUrl $dest
    $final = $downloaddir + "runtime.exe"
    copyOnVerify $dest $final
    if (Test-Path -LiteralPath $final)
    {
      cd $downloaddir
      if ($host.Version.Major -eq 3)
      {
        .runtime.exe -y | Out-Null
        .setup.cmd
      }
      else
      {
        Start-Process -FilePath $final -ArgumentList -y -Wait 
        $cmd = $downloaddir + "setup.cmd"
        Start-Process -FilePath $cmd -Wait
      }
    }
    else
    {
       throw "Unable to verify package"
    }
    cd $current
    if (Test-Path -LiteralPath $downloaddir)
    {
       Remove-Item -LiteralPath $downloaddir -Force -Recurse
    }
}

Answer 1

好了，我明白了:

下载。Ps1是用来下载node.exe的，所以如果你想让你的应用运行起来，这是非常重要的。该脚本是从Setup_Worker调用的。cmd(如果您正在部署工作角色)或Setup_Web. cmd。CMD(如果您正在部署web角色)。它接受以下参数:'%RUNTIMEURL%' '%RUNTIMEURLOVERRIDE%' '。%RUNTIMEURL%在ServiceDefinition.csdef中定义和初始化。我找不到'%RUNTIMEURLOVERRIDE%'是在哪里定义的，实际上，在没有这个参数的情况下运行脚本很好。

我已经写了一篇关于这个的博客文章:https://shilessam.wordpress.com/2014/07/08/azure-node-js-download-ps1-a-what-what/