Penalties For Rewriting the URL (ASP.NET)?

[pedrodepacos]

Greetings,

I have an e-commerce application written in ASP.NET. I just started rewriting my dynamic URLs in the Global.asax module. The method I use is outlined below...

Sub Application_BeginRequest(ByVal sender As Object, ByVal e As EventArgs)
Dim incomingHTTP As HttpContext = HttpContext.Current
'code to parse the URL to find how to rewrite...
'...
incomingHTTP.RewritePath("default.aspx?Page=" & strPage)
End Sub

This method works great and allows me to to remove querystrings from the URL. My question is, will Search Engines penalize you for using this method? It seems to me that it is not too much different than redirecting a user to a different page.

[lty83]

I perform URI rewriting with ASP and a 3rd party software program and i haven't been penalized by google, my buddy has an ecommerce site and does the same thing and he is also fine w/ the SE's

i don't see how that would be a problem unless you started duping pages with different uri's or whatever

[pedrodepacos]

I appreciate your response. This leads me to another question... I have heard that sites with duplicate content will be penalized by Google. Since there are 2 URLs that point to the same page, will Google see this as duplicate content? I'm already indexed in Google, but my old pages contained the long dynamic URLs and these are the pages currently indexed with Google.

[f00sion]

the duplicate content is where you will run into trouble, each page should only be accessable from one uri...any requests going to the old ones with parameters should be redirected with a 301 to the new ones...that way the next time a spider visits it will see the new link and update its index.