How to keep Google from indexing the Session ID in

问题:

One of my sites is for old mobile phones that don't accept cookies so it uses a URL-based Session ID.

However, Google is indexing the Session ID, so when my site is searched on Google, all the results come up with a specific Session ID.

On most occasions, that Session ID is no longer valid by the time a guest clicks on it, but I've had at least one case where a guest clicked on a link from Google and it actually logged them into someone else's account, which is obviously a huge security flaw.

So how can I keep Google from indexing the Session ID in my URL's? In case it helps, the Session ID has always been set to "Representative URL" in Google's Webmaster Tools.

回答1:

You can do this by placing a robots.txt file in your root web directory to tell Googlebot and all other crawlers not to crawl URLs with that attribute.

Here is an example:

Lets say the URL you want to block is in the form of:

http://www.mywebsite.com/page.html?id=1234

The robots.txt syntax to block URLs with the id attribute is:

User-agent: *
Disallow: /*id

You can find out more about robots.txt at http://www.robotstxt.org

Read more about this at http://www.seochat.com/c/a/Search-Engine-Optimization-Help/Preventing-Duplicate-Content-on-an-ECommerce-Site-from-Session-IDs/1/