CODEWITHSUNDEEP
regex.htaccess
gege
gege

Reputation: 101

Matching more than one instance of same parameter with mod_rewrite

I'm having some problem with a rewrite rule. I have a website that accepts as parameter a paging options, as parameter in any position

index.php?page=2
index.php?other_parameter=other_value&page=2&another_paramenter=another_value

Now problem is that some crawlers use to append all the parameters they can see on the page, so they try

index.php?page=2&page=3&page=4
index.php?other_parameter=other_value&page=2&page=3&page=4&another_paramenter=another_value

I'd like to block these second attempts, so basically block any call that has in the query parameters more than one instance of page=NN, possibly redirecting them to homepage.

I'm using https://technicalseo.com/tools/htaccess/ to test some regexp to match this, but I just can't seem to find a way to block any url with multiple page= parameters.

Any hint how you would do it?

Upvotes: 1

Views: 63

Answers (1)

anubhava
anubhava

Reputation: 785186

You may use this rule to block such query strings:

RewriteCond %{QUERY_STRING} (?:^|&)(page=)\d+(?=&(?:.*&)?\1) [NC]
RewriteRule ^ - [F]

RegEx Demo

Regex pattern in this condition matches page=<number> if that is followed by another instance of the page= anywhere in the query string. If match is successful that request is denied (403).

Upvotes: 2

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