Trouble with Powershell script to call HTTP POST

ag — Thu, 05 Jun 2025 05:30:12 GMT

Hi,

I am using WFA REST APIs and one of the API there is to invoke a restore operation on WFA.

I am not able to figure out a way to invoke an HTTP POST call by passing content of type multipart/form-data.

the type of file(backup file) i am trying to upload is gzip or zip file.

The script i am using is:

function invoke-rest {

param([string]$uri, [string]$body )

[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true}

#$enc = [system.Text.Encoding]::UTF8

$request = [System.Net.HttpWebRequest]::Create($uri)

$request.Credentials = New-Object system.net.networkcredential("admin","admin")

$request.CookieContainer = New-Object System.Net.CookieContainer

$boundary = "--------------"+(get-date -format yyyymmddhhmmss).ToString()

$request.ContentType = "application/octet-stream; charset=UTF-8;"

$request.Method = "Put"

$request.keepAlive = $true

$requestStream = $request.GetRequestStream()

$streamWriter = New-Object System.IO.StreamWriter($requestStream)

$streamWriter.Write($body)

$streamWriter.flush()

$streamWriter.close()

[net.httpWebResponse]$response = $request.GetResponse()

$responseStream = $response.GetResponseStream()

$stream = new-object System.IO.StreamReader $responseStream

$xmlDump = $stream.ReadToEnd()

$output = [xml]$xmlDump

$response.close()

return $output

}

$method = "POST"

$body = @{}

$body = @{"name"="backupFile"; "filename"=[IO.File]::ReadAllBytes("C:\Users\Administrator\Desktop\wfa_backup_AG-1_.sql.gz")}

invoke-rest $uri $body

The error i get is:

Exception calling "GetResponse" with "0" argument(s): "The remote server returned an error: (500) Internal Server Error

At C:\Users\Administrator\Desktop\restore.ps1:19 char:58

+ [net.httpWebResponse]$response = $request.GetResponse <<<< ()

+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException

+ FullyQualifiedErrorId : DotNetMethodException

Any help is appreciated. You can also test a script here:

Thanks,

Anil

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