Facebook LIKE button

here is a marketing idea that needs some sort of confirmation app.

Give discounts based on friend count. For example 1000 friends - %10 off with a wall post. "TrekLightGear.com just hooked me up with this x product!" Picture attached.

The app would allow the moderator to set discounts or give coupons based on friend network size. More friends equals more exposure equals more "word of mouth" advertising.

For SEO enabled site I had to use a quick fix using the Replace function.
Based on Sean@WMS code example, thank you Sean.

With the SEO enabled on the site the original link was like the one shown below which created an error 404 while using the facebook link back to the site:

Example:
http://www.yoursite.com/productcart/pc/404.asp?404;http://www.yoursite.com/productcart/pc/Blue-Pinpoint-3p3.htm

I realized then the pattern with the recurring first half of the URL which created the error. I then just decided to use a replace function to get rid of it as it is always the same string.
replace(strLikeURL,"http://www.yoursite.com/productcart/pc/404.asp?404;","")

Here is the final version I implemented on one of my ProductCart Site using SEO (in ViewProdC.asp). Sean Thanks again.

<%
Dim strLikeURL
If Request.ServerVariables("HTTPS") = "ON" Then
      strLikeURL = "https://"
Else
      strLikeURL = "http://"
End If
strLikeURL = strLikeURL & Request.ServerVariables("SERVER_NAME")
strLikeURL = strLikeURL & Request.ServerVariables("SCRIPT_NAME")
If Len(Request.ServerVariables("QUERY_STRING") & "") > 0 Then strLikeURL = strLikeURL & "?" & Server.HTMLEncode(Request.ServerVariables("QUERY_STRING")) end if
strLikeURL = replace(strLikeURL,"http://www.yoursite.com/productcart/pc/404.asp?404;","")
%>
<script src="http://connect.facebook.net/en_US/all.js#xfbml=1"></script><fb:like href="<%=strLikeURL%>" layout="button_count"></fb:like>


At the end I find myself with the appropriate URL, based on the example above, it will then return
http://www.yoursite.com/productcart/pc/Blue-Pinpoint-3p3.htm

Note that it is very important to use the SERVER.HTMLEncode()function while using the request object to obtain querystring values:
Server.HTMLEncode(Request.ServerVariables("QUERY_STRING"))

If not, you will then open your site to XSS vulnerabilities which will also affect the PCI Compliance of productcart.


Maybe not the best coding practice but it worked for me.

Edited by Vincent - 10-November-2010 at 1:38am