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Send a Staged Multipart REST Request

Demonstrates Rest.SendReqMultipart, which sends a multipart request using the parts configured on the object, then reads the response in separate steps.

Background. The staged request model separates sending from reading: a SendReq method transmits the request, ReadResponseHeader reads the status line and headers, and a ReadResp method reads the body. This gives fine control over large or streamed messages compared with the single-call full-request methods.

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Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

$rest = New-Object Chilkat.Rest
$bTls = $true
$bAutoReconnect = $true
$success = $rest.Connect("example.com",443,$bTls,$bAutoReconnect)
if ($success -eq $false) {
    $($rest.LastErrorText)
    exit
}

#  Configure one multipart part before sending.
$rest.PartSelector = "1"
$rest.AddHeader("Content-Type","text/plain")
$rest.AddHeader("Content-Disposition","form-data; name=`"field1`"")
$success = $rest.SetMultipartBodyString("value1")
if ($success -eq $false) {
    $($rest.LastErrorText)
    exit
}

#  Send the multipart request using the configured parts.
$success = $rest.SendReqMultipart("POST","/api/upload")
if ($success -eq $false) {
    $($rest.LastErrorText)
    exit
}

#  After sending, read the response status line and header fields.  The return value is the HTTP
#  status code, or -1 if no response was received.
$statusCode = $rest.ReadResponseHeader()
if ($statusCode -lt 0) {
    $($rest.LastErrorText)
    exit
}

$("Response status code: " + $statusCode)

#  Read the response body as text.
$responseBody = $rest.ReadRespBodyString()
if ($rest.LastMethodSuccess -eq $false) {
    $($rest.LastErrorText)
    exit
}

$($responseBody)