http - 从 Powershell 脚本上传多个文件

Question

我有一个网络应用程序可以像这样处理 HTML 表单的 POST:

<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>

注意有两个type="file" <input>元素。

如何从 Powershell 脚本编写 POSTing 脚本？我计划这样做是为了为该服务创建一个简单的测试框架。

我找到了 WebClient.UploadFile() , 但它只能处理单个文件。

感谢您抽出宝贵时间。

Answer 1

我今天一直在使用 PowerShell 制作多部分 HTTP POST。希望下面的代码对您有所帮助。

• PowerShell 本身不能进行多部分表单上传。
• 关于它的样本也不多。我根据 this 构建了代码和 this .
• 当然，Invoke-RestMethod 需要 PowerShell 3.0，但上述链接后面的代码显示了如何直接使用 .NET 执行 HTTP POST，从而使您也可以在 Windows XP 中运行它.

祝你好运!请告诉你是否让它工作。

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 $_
    }
}