Submission Method + WinHttpRequest + multipart / form-data

Question

I'm at a dead end why this doesn't work, it seems like it can't find any problems.

Here is the code.

Public Const MULTIPART_BOUNDARY = "speed"
Function getBalance() As String
Dim sEntityBody As String
Dim postBody() As Byte
Dim username As String
Dim password As String

username = CStr(frmMain.txtUser.text)
password = CStr(frmMain.txtPass.text)

sEntityBody = "--" & MULTIPART_BOUNDARY & vbCrLf
sEntityBody = sEntityBody & "Content-Disposition: form-data; name=""function""" & vbCrLf & vbCrLf & "balance" & vbCrLf
sEntityBody = sEntityBody & "--" & MULTIPART_BOUNDARY & vbCrLf
sEntityBody = sEntityBody & "Content-Disposition: form-data; name=""username""" & vbCrLf & vbCrLf & username & vbCrLf
sEntityBody = sEntityBody & "--" & MULTIPART_BOUNDARY & vbCrLf
sEntityBody = sEntityBody & "Content-Disposition: form-data; name=""password""" & vbCrLf & vbCrLf & password & vbCrLf
sEntityBody = sEntityBody & "--" & MULTIPART_BOUNDARY & "--" & vbCrLf

postBody = StrConv(sEntityBody, vbFromUnicode)

Dim xhr As Object
Set xhr = CreateObject("WinHttp.WinHttpRequest.5.1")
xhr.Option(WinHttpRequestOption_EnableRedirects) = False
If xhr Is Nothing Then Set xhr = CreateObject("WinHttp.WinHttpRequest")
If xhr Is Nothing Then Set xhr = CreateObject("MSXML2.ServerXMLHTTP")
If xhr Is Nothing Then Set xhr = CreateObject("Microsoft.XMLHTTP")
xhr.open "POST", "http://poster.example.com", False

xhr.setRequestHeader "User-Agent", "Alalala"
xhr.setRequestHeader "Content-Type", "multipart/form-data; boundary=" & MULTIPART_BOUNDARY
xhr.setRequestHeader "Content-Length", Len(sEntityBody)
xhr.send "" + sEntityBody 'postBody 'URLEncode(sEntityBody)

    If xhr.Status = 200 Then
        getBalance = xhr.responseText
    Else
        frmMain.addToChatbox "Failed at getting response from blah ErrCode:" & xhr.Status
    End If
End Function

Now this works below (although this is only an HTML form).

<form 
 method="post" 
 action="http://poster.example.com/" 
 enctype="multipart/form-data">
 <input type="hidden" name="function" value="balance">
 <input type="text"   name="username" value="blah">
 <input type="text"   name="password" value="blah">
 <input type="submit" value="Send">
</form>

Here is a batch scent. (Changed host, etc. After the example)

POST / HTTP / 1.1..User-Agent: Alalala..Content-Type: multipart / form-data; border = speed..Content-Length: 233..Accept: / .. Host: poster.example.com..Connection: Keep-Alive ....-- speed..Content-Dispostion: form-data; name = "functions" .... balance ..-- speed..Content-Dispostion: form data; name = "username" .... blah ..-- speed..Content-Dispostion: form data; name = "password" .... blah ..-- speed - ..

the answer is empty

HTTP/1.1 200 OK..Date: Thu, 07 Oct 2010 20:31:20 GMT..Server: Apache..Content-Length: 0..Connection: close..Content-Type: text/html; = UTF-8,....

P.S. > "" , , - . , , , + ( ) , firefox/chrome 2 .

Answer 1

Content-Dispostion Content-Disposition yup , 6? , 7 .