A free component to create Excel files on the fly
Techniques
This section makes it possible to gather a whole of techniques or scripts which have the originality to manage to solve a difficulty with the least effort or which are particularly effective...The grayed entries relate to the future headings which will supplement soon this toolbox.
Techniques / Composants Security : DypsAntiSpam
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- How to prevent automatic submission with DypsAntiSpam :
<See object reference for DypsAntiSpam>
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This short example will help you to to prevent automatic submission with DypsAntiSpam.
This example is based on two ASP page :
- the first one containing a form and an input where the user can write the code displayed by DypsAntiSpam,
- the second one will generate the image CAPTCHA and store the random string the user must provide to access to a protected web page or submit is data to your forum...
'This first page will display a form
<html>
<body>
<%
if request.Form("code") <> "" Then
response.write "Data stored in your session object : <b>"&_
session("p") & "</b><br>"
response.write "And here what you get from the form : <b>"&_
request.Form("code") & "</b><br>"
end if
if session("p") = request.Form("code") _
and len(session("p"))>0 then
response.redirect "restricted_place.asp"
end if
%>
<br>
Type the code you see in the picture behind.
<form method="POST">
<img src='antispam.asp' >
<input name='code' width='145' height='20'>
<input type='submit'>
</form>
</body>
</html>
As you have notice the first page will include an IMG tag and the source file is "antispam.asp". This file will generate the image to display. Here is its content :
<%
'Create the Challenger object
set antisp = server.createObject("DypsAntiSpam.challenger")
'Create random string and store it
'in a sessions variable
session("p") = antisp.getRandomString
'Generate image !
antisp.genImage
'That's it!
set antisp = nothing
%>
<See object reference for DypsAntiSpam>
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