内容长度和Invoke-WebRequest

Question

我正在尝试使用Invoke-WebRequest上传XML文件(不推荐使用Invoke-RestMethod？)但在尝试设置头部中的content-length时，我得到了错误：

Invoke-WebRequest : You must write ContentLength bytes to the request stream before calling [Begin]GetResponse.

我需要创建一个请求流吗？我已经检查了https://social.technet.microsoft.com/Forums/windowsserver/en-US/d18f4ae9-4a5d-495f-aa2d-fbda3d616967/invokewebrequest-you-must-write-contentlength-bytes-to-the-request-stream-before-calling，但似乎不能回答这个问题。

$requestHeaders = @{
    "content-length" = 2182
    "Content-Type" = "application/xml"
    "Authorization"  = "Bearer " + $response.access_token
}

$body = @"
    $xml
"@

$result = Invoke-WebRequest -Method Post -Uri "{uri}" -Headers $requestHeaders -Body $Body

Answer 1

在尝试了@Theo的注释之后，我在头文件中添加了Transfer-Encoding，它看起来很有效！完整修复代码：

$requestHeaders = @{
#content-length not needed?
"Transfer-Encoding" = "chunked"
"Content-Type" = "application/xml"
"Authorization"  = "Bearer " + $response.access_token
}

try {

   $result = Invoke-RestMethod -Method Post -Uri "{uri}" -Headers $requestHeaders -Body $xml

} catch {

    # write exception message

    $result = $_.Exception.Response.GetResponseStream()
    $reader = New-Object System.IO.StreamReader($result)
    $reader.BaseStream.Position = 0
    $reader.DiscardBufferedData()
    $responseBody = $reader.ReadToEnd();
    Write-Host $responseBody

}