从 Powershell 脚本上传多个文件 [英] Upload multiple files from Powershell script

问题描述

我有一个 web 应用程序，可以处理这样的 html 表单的 POST:

I have a webapplication that can process POSTing of a html form like this:

<form action="x" method="post" enctype="multipart/form-data">
  <input name="xfa" type="file">
  <input name="pdf" type="file">
  <input type="submit" value="Submit">
</form>

请注意，有两个 type="file" 元素.

Note that there are two type="file" <input> elements.

如何从 Powershell 脚本编写 POST 脚本?我打算这样做，为服务创建一个简单的测试框架.

How can I script POSTing this from a Powershell script? I plan to do that to create a simple test-framework for the service.

我找到了 WebClient.UploadFile()，但只能处理一个文件.

I found WebClient.UploadFile(), but that can only handle a single file.

感谢您抽出宝贵时间.

推荐答案

我今天一直在使用 PowerShell 制作多部分 HTTP POST.希望下面的代码对你有帮助.

I've been crafting multipart HTTP POST with PowerShell today. I hope the code below is helpful to you.

• PowerShell 本身不能进行多部分表单上传.
• 关于它的样本也不多.我基于 this 和 这个.
• 当然，Invoke-RestMethod 需要 PowerShell 3.0，但以上链接后面的代码显示了如何直接使用 .NET 执行 HTTP POST，让您也可以在 Windows XP 中运行它.

• PowerShell itself cannot do multipart form uploads.
• There are not many sample about it either. I built the code based on this and this.
• Sure, Invoke-RestMethod requires PowerShell 3.0 but the code in the latter of the above links shows how to do HTTP POST with .NET directly, allowing you to have this running in Windows XP as well.

祝你好运！请告诉您是否可以使用它.

Good luck! Please tell if you got it to work.

function Send-Results {
    param (
        [parameter(Mandatory=$True,Position=1)] [ValidateScript({ Test-Path -PathType Leaf $_ })] [String] $ResultFilePath,
        [parameter(Mandatory=$True,Position=2)] [System.URI] $ResultURL
    )
    $fileBin = [IO.File]::ReadAllBytes($ResultFilePath)
    $computer= $env:COMPUTERNAME

    # Convert byte-array to string (without changing anything)
    #
    $enc = [System.Text.Encoding]::GetEncoding("iso-8859-1")
    $fileEnc = $enc.GetString($fileBin)

    <#
    # PowerShell does not (yet) have built-in support for making 'multipart' (i.e. binary file upload compatible)
    # form uploads. So we have to craft one...
    #
    # This is doing similar to: 
    # $ curl -i -F "file=@file.any" -F "computer=MYPC" http://url
    #
    # Boundary is anything that is guaranteed not to exist in the sent data (i.e. string long enough)
    #    
    # Note: The protocol is very precise about getting the number of line feeds correct (both CRLF or LF work).
    #>
    $boundary = [System.Guid]::NewGuid().ToString()    # 

    $LF = "`n"
    $bodyLines = (
        "--$boundary",
        "Content-Disposition: form-data; name=`"file`"$LF",   # filename= is optional
        $fileEnc,
        "--$boundary",
        "Content-Disposition: form-data; name=`"computer`"$LF",
        $computer,
        "--$boundary--$LF"
        ) -join $LF

    try {
        # Returns the response gotten from the server (we pass it on).
        #
        Invoke-RestMethod -Uri $URL -Method Post -ContentType "multipart/form-data; boundary=`"$boundary`"" -TimeoutSec 20 -Body $bodyLines
    }
    catch [System.Net.WebException] {
        Write-Error( "FAILED to reach '$URL': $_" )
        throw $_
    }
}

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