powershell POST multipart upload

param(
[System.IO.FileInfo]$file = $null,
[string]$login = $null
);

$CODEPAGE = "iso-8859-1";

$url_upload = "http://iksrv.ru/photo_update.html";

#--------------------------------------------------------------------------------------------
# function Get-EncodedDataFromFile
#--------------------------------------------------------------------------------------------
function Get-EncodedDataFromFile()
{
param(
[System.IO.FileInfo]$file = $null,
[string]$codePageName = $CODEPAGE
);

$data = $null;

if ( $file -and [System.IO.File]::Exists($file.FullName) )
{
$bytes = [System.IO.File]::ReadAllBytes($file.FullName);
if ( $bytes )
{
$enc = [System.Text.Encoding]::GetEncoding($codePageName);
$data = $enc.GetString($bytes);
}
}
else
{
Write-Host "ERROR; File '$file' does not exist";
}
$data;
}

#--------------------------------------------------------------------------------------------
# function Get-ImageContentType
#--------------------------------------------------------------------------------------------
function Get-ImageContentType()
{
param([System.IO.FileInfo]$file = $null);
$contentType = $null;
$contentTypeMap = @{
".jpg" = "image/jpeg";
".jpeg" = "image/jpeg";
".gif" = "image/gif";
".png" = "image/png";
".tiff" = "image/tiff";
}

if ( $file )
{
$contentType = $contentTypeMap[$file.Extension.ToLower()];
}
$contentType;
}

#----------------------------------------------------------------------------
# function Execute-HTTPPostCommand
#----------------------------------------------------------------------------
function Execute-HTTPPostCommand()
{
param(
[string] $url = $null,
[string] $data = $null,
[System.Net.NetworkCredential]$credentials = $null,
[string] $contentType = "application/x-www-form-urlencoded",
[string] $codePageName = "UTF-8",
[string] $userAgent = $null
);

if ( $url -and $data )
{
[System.Net.WebRequest]$webRequest = [System.Net.WebRequest]::Create($url);
$webRequest.ServicePoint.Expect100Continue = $false;
if ( $credentials )
{
$webRequest.Credentials = $credentials;
$webRequest.PreAuthenticate = $true;
}
$webRequest.ContentType = $contentType;
$webRequest.Method = "POST";
if ( $userAgent )
{
$webRequest.UserAgent = $userAgent;
}

$enc = [System.Text.Encoding]::GetEncoding($codePageName);
[byte[]]$bytes = $enc.GetBytes($data);
$webRequest.ContentLength = $bytes.Length;
[System.IO.Stream]$reqStream = $webRequest.GetRequestStream();
$reqStream.Write($bytes, 0, $bytes.Length);
$reqStream.Flush();

$resp = $webRequest.GetResponse();
$rs = $resp.GetResponseStream();
[System.IO.StreamReader]$sr = New-Object System.IO.StreamReader -argumentList $rs;
$sr.ReadToEnd();
}
}

#--------------------------------------------------------------------------------------------
# function Post-TwitPic
#--------------------------------------------------------------------------------------------
function Post-GD()
{
param
(
[System.IO.FileInfo]$file = $null,
[string]$login = $null
);

if ( $file -and $login )
{
$boundary = [System.Guid]::NewGuid().ToString();
$header = "--{0}" -f $boundary;
$footer = "--{0}--" -f $boundary;

[System.Text.StringBuilder]$contents = New-Object System.Text.StringBuilder;
[void]$contents.AppendLine($header);

$filedata = Get-EncodedDataFromFile -file $file -codePageName $CODEPAGE;
if ( $filedata )
{
write-host $filedata.length
$fileContentType = Get-ImageContentType -file $file;
$fileHeader = "Content-Disposition: file; name=""{0}""; filename=""{1}""" -f "photo", $file.Name;

[void]$contents.AppendLine($fileHeader);
[void]$contents.AppendLine("Content-Type: {0}" -f $fileContentType);
[void]$contents.AppendLine();
[void]$contents.AppendLine($fileData);

[void]$contents.AppendLine($header);
[void]$contents.AppendLine("Content-Disposition: form-data; name=""cmd""");
[void]$contents.AppendLine();
[void]$contents.AppendLine("photoupdate");

[void]$contents.AppendLine($header);
[void]$contents.AppendLine("Content-Disposition: form-data; name=""up""");
[void]$contents.AppendLine();
[void]$contents.AppendLine("1");

[void]$contents.AppendLine($header);
[void]$contents.AppendLine("Content-Disposition: form-data; name=""login""");
[void]$contents.AppendLine();
[void]$contents.AppendLine($login);

$url = $url_upload;

[void]$contents.AppendLine($footer);

$contents.ToString() > ".\out.txt";

$postContentType = "multipart/form-data; boundary={0}" -f $boundary;

$resp = Execute-HTTPPostcommand -url $url -data $contents.ToString() -contentType $postContentType -codePageName $CODEPAGE -userAgent "f.u.c.k";

$resp
<#
[xml]$resp = Execute-HTTPPostcommand -url $url -data $contents.ToString() -contentType $postContentType -codePageName $CODEPAGE -userAgent "f.u.c.k";

if ( $resp )
{
switch ($resp.rsp.stat)
{
"ok" {
$obj = 1 | select mediaid, mediaurl;
$obj.mediaid = $resp.rsp.mediaid;
$obj.mediaurl = $resp.rsp.mediaurl;
$obj;
}
"fail" {
$errcode = $resp.rsp.err.code;
$errmsg = $resp.rsp.err.msg;
Write-Host "Post Error: Code = '$errcode'; Message = '$errmsg'";
}
}
}
#>

}
}
else
{
Write-Host "USAGE: Post-GD.ps1 -file file -login $login";
}
}


if ( $file -and $login)
{
write-host "$file"

Post-GD -file $file -login $login;
}
else
{
Write-Host "USAGE: Post-GD.ps1 -file file -login $login";
}