Post binary data to URL from WSH/ASP/VBA/VBScript. 

      This article was created as appendix for Upload file using IE+ADO without user interaction - VBS. The "Upload file" article lets you build multipart/form-data document from source file. You can send the binary document to any server using several ways.

1. Internet explorer.

      "Upload file" article contains function IEPostBinaryRequest, which uses most common http object - Internet explorer. The object has one great characteristic - you can find it on any Windows computer, so you can use the code on webhosting computers, without installing of another software. But the object is NOT optimal to use it in such tasks. Positives, negatives:
+ Present on each Windows computer
+ When debugging, you can uncomment "Visible" line and see results of upload script directly.
- InternetExplorer.Application does not have a method, which lets you wait to end of request. You must do "do-loop" to wait.
- IE takes more memory than other methods
- IE Uses WinInet API, which is not suitable for use in ASP applications (You can run maximum of two instances per server in destination URL)

'sends multipart/form-data To the URL using IE
'FormData - binary (VT_UI1 | VT_ARRAY) multipart form data
Function IEPostBinaryRequest(URL, FormData, Boundary)
  'Create InternetExplorer
  Dim IE: Set IE = CreateObject("InternetExplorer.Application")
  
  'You can uncoment Next line To see form results
  'IE.Visible = True
   
  'Send the form data To URL As POST binary request
  IE.Navigate URL, , , FormData, _
    "Content-Type: multipart/form-data; boundary=" + Boundary + vbCrLf

  Do While IE.Busy
    Wait 1, "Upload To " & URL
  Loop
  
  'Get a result of the script which has received upload
  On Error Resume Next
  IEPostBinaryRequest = IE.Document.Body.innerHTML
  IE.Quit
End Function

Sub Wait(Seconds, Message)
  On Error Resume Next
  Dim Shell
  If IsEmpty(Shell) Then Set Shell = CreateObject("wscript.shell")
  Shell.Popup Message, Seconds, "", 64
End Sub

2. http request object.

      Other free method to send binary data is "http request" object from MS. As usuall in MS, there are several versions of http request objects.
1. XMLHTTP. First http request object from MS, designed to work with VBS/ASP/WSH. This object uses WinInet API (which is not suitable for use in ASP applications, see IE)
2. ServerXMLHTTP. This object was created because of problems with XMLHTTP in server applications. It contains its own http engine, which is safe to use in server applications. The http engine has some small limitations (I think it does not enable client certificates, etc.), but the limitations has probably no impact to usual demands.
You can find XMLHTTP/ServerXMLHTTP at http://msdn.microsoft.com in MS XML package as free download.
3. WinHTTP object. Similar as ServerXMLHTTP You can find the object at http://msdn.microsoft.com, search for WinHTTP.
My recomendation - use this object, if you can install it. MSXML 4.0 package uses this library also (see http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk/htm/sdk_dependencies_9po5.asp)

      These three objects has almost the same OLE interface, so you can use the same source code:

'sends multipart/form-data To the URL using WinHttprequest/XMLHTTP
'FormData - binary (VT_UI1 | VT_ARRAY) multipart form data
Function WinHTTPPostRequest(URL, FormData, Boundary)
  Dim http 'As New MSXML2.XMLHTTP
  
  'Create XMLHTTP/ServerXMLHTTP/WinHttprequest object
  'You can use any of these three objects.
  Set http = CreateObject("WinHttp.WinHttprequest.5")
  'Set http = CreateObject("MSXML2.XMLHTTP")
  'Set http = CreateObject("MSXML2.ServerXMLHTTP")
  
  'Open URL As POST request
  http.Open "POST", URL, False
  
  'Set Content-Type header
  http.setRequestHeader "Content-Type", "multipart/form-data; boundary=" + Boundary
  
  'Send the form data To URL As POST binary request
  http.send FormData
  
  'Get a result of the script which has received upload
  WinHTTPPostRequest = http.responseText
End Function

<A
 Href="http://www.motobit.com/tips/detpg_post-binary-data-url/"
 Title="Two methods to POST binary or
  string data to external URL
  and read results sent from
  a script on the URL."
>Post binary data to URL from WSH/ASP/VBA/VBScript.</A>