Confused about calling wininet
I'm trying to call perl scripts on a server using wininet. I can run this code from
The function below runs from inside VBA; what I'd like to do is craft an NSIS version of it. I know I can call System::wininet, but i'm new to NSIS and struggling to understand how to pass parameters and get results for specific inet functions. Specifically, how to emulate the calls to InternetOpen and InternetOpenUrl below. Any pointers appreciated
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Function GetServerScriptResponse(sUrl As String) As String
Dim s As String
Dim hOpen As Long
Dim hOpenUrl As Long
Dim bDoLoop As Boolean
Dim bRet As Boolean
Dim sReadBuffer As String * 2048
Dim lNumberOfBytesRead As Long
hOpen = InternetOpen(scUserAgent, INTERNET_OPEN_TYPE_PRECONFIG, vbNullString, vbNullString, 0)
hOpenUrl = InternetOpenUrl(hOpen, sUrl, vbNullString, 0, INTERNET_FLAG_RELOAD, 0)
bDoLoop = True
While bDoLoop
sReadBuffer = vbNullString
bRet = InternetReadFile(hOpenUrl, sReadBuffer, Len(sReadBuffer), lNumberOfBytesRead)
s = s & Left$(sReadBuffer, lNumberOfBytesRead)
If Not CBool(lNumberOfBytesRead) Then bDoLoop = False
Wend
If hOpenUrl <> 0 Then InternetCloseHandle (hOpenUrl)
If hOpen <> 0 Then InternetCloseHandle (hOpen)
GetServerScriptResponse = s
End Function
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Here are the declarations it uses:
Private Const INTERNET_OPEN_TYPE_PRECONFIG = 0
Private Const INTERNET_OPEN_TYPE_DIRECT = 1
Private Const INTERNET_OPEN_TYPE_PROXY = 3
Private Const scUserAgent = "VB OpenUrl"
Private Const INTERNET_FLAG_RELOAD = &H80000000
Public Declare Function InternetOpen Lib "wininet.dll" Alias "InternetOpenA" _
(ByVal sAgent As String, ByVal lAccessType As Long, ByVal sProxyName As String, _
ByVal sProxyBypass As String, ByVal lFlags As Long) As Long
Public Declare Function InternetOpenUrl Lib "wininet.dll" Alias "InternetOpenUrlA" _
(ByVal hOpen As Long, ByVal sUrl As String, ByVal sHeaders As String, _
ByVal lLength As Long, ByVal lFlags As Long, ByVal lContext As Long) As Long
Public Declare Function InternetReadFile Lib "wininet.dll" _
(ByVal hFile As Long, ByVal sBuffer As String, ByVal lNumBytesToRead As Long, _
lNumberOfBytesRead As Long) As Integer
Public Declare Function InternetCloseHandle Lib "wininet.dll" _
(ByVal hInet As Long) As Integer