Mod_Rewrite how to ignore slashes that don't belong in url string - apache

Question

I'm trying to setup canonical links in our forum and I need to come up with a rewrite rule that will ignores slashes that don't belong in the URL.
The proper URL would look like:
http://www.truckingtruth.com/truckers-forum/Topic-20315/Page-1/speak-to-recruiter
For this I'm using the following mod_rewrite rule to pass the 'topic', 'page', and 'subjectString' variables:
^Topic-(.*)/Page-(.*)/(.*)$ index.html?topic=$1&page=$2&subjectString=$3
But sometimes improper links to our site or improper links in a comment will add slashes to the URL that don't belong there and it throws off the rule. Example:
http://www.truckingtruth.com/truckers-forum/Topic-1652/Page-1/www.truckingtruth.com/free_truck_driving_schools/swift/how-to-use-the-qualcomm
When that happens the variables being passed are:
topic = "1652"
page = "1/www.truckingtruth.com/free_truck_driving_schools/swift"
subjectString = "how-to-use-the-qualcomm"
What I want it to do is pass:
topic = "1652"
page = "1"
subjectString = "www.truckingtruth.com/free_truck_driving_schools/swift/how-to-use-the-qualcomm"
How can I create a rewrite rule that will pass everything after "Page-1" as the subjectString even if there are slashes in it?

Answer 1

Since the topic is always integer, for your first capturing group you can use \d which matches any decimal digit (equivalent to [0-9]).
For page, just make sure not to include any slashes, [^/] will take care of that.
The rest should then all go to third capturing group, so the resulting regex will be:
^Topic-(\d*)/Page-([^/]*)/(.*)$