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vb post data to web site

Posted on 2006-06-24
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Last Modified: 2008-01-09
Hello
I am using VB Express 2005 and would like ideas of how to automatically post data to a website.
I want to create an application which will periodically send it's results to a public web server over https so that it can be analysed. VB Express 2005 includes a Web Browser control if this helps.
My intention is to use the VB app to compress a file of results and then post that file to an appropriate server.
Any ideas?
Thanks
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Question by:john_123
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5 Comments
 
LVL 35

Expert Comment

by:[ fanpages ]
ID: 16977982
Hi,

Speak to the owner of the server & ask how they can receive your file, or the contents of your file.

You may be able to post the entire file using a HTTP:// request, or you may need to stream the contents line by line (or character by character) to a pre-built data channel.

BFN,

fp.

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LVL 1

Author Comment

by:john_123
ID: 16978943
Hi
We are the owner of the server.
We need to periodically transfer an amount of statistical data to a web server for analysis.
Rather than writing a client/server to transfer data I thought it would be appopriate to simply post the data to the web server. This way I can also use HTTPS to encrypt it later.

I have gone down this path so far
 
Dim xmlhttp As Object
xmlhttp = CreateObject("MSXML2.ServerXMLHTTP")
xmlhttp.Open("POST", "http://website.com/update.php", False)
xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded")
xmlhttp.send("probe_id=2&stuff=2")
MsgBox(xmlhttp.ResponseText)
xmlhttp = Nothing

This only seems to allow me to send data separated by the & sign as part of the URL - I would like to use this to be able to submit a file.

Is there any better way to achieve this?
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LVL 1

Author Comment

by:john_123
ID: 16979853
I think I have achieved my goal through the following...

  Dim strText As String, strBody As String
        Dim strFilename As String
        strFilename = "c:\results.txt"

        Microsoft.VisualBasic.FileOpen(1, strFilename, OpenMode.Binary, OpenAccess.Read)
        strText = New String(" ", LOF(1))
        Microsoft.VisualBasic.FileGet(1, strText)
        Microsoft.VisualBasic.FileClose(1)

        Dim xmlhttp As Object
        xmlhttp = CreateObject("MSXML2.ServerXMLHTTP")
        xmlhttp.Open("POST", "http://www.website.com/update.php", False)
        xmlhttp.setRequestHeader("Content-Type", "multipart/form-data, boundary=AaB03x")
        strBody = _
           "--AaB03x" & vbCrLf & _
           "Content-Disposition: form-data; name=""probe_id""" & vbCrLf & vbCrLf & _
           "12345" & vbCrLf & _
           "--AaB03x" & vbCrLf & _
           "Content-Disposition: attachment; name=""FILE1""; filename=""" & strFilename & """" & vbCrLf & _
           "Content-Type: text/plain" & vbCrLf & vbCrLf & _
           strText & vbCrLf & _
           "--AaB03x"
        xmlhttp.send(System.Text.Encoding.Default.GetBytes(strBody))
        MsgBox(xmlhttp.ResponseText)
        xmlhttp = Nothing
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