CODEWITHSUNDEEP
regexpcrevarnish
Herod2k
Herod2k

Reputation: 61

BAN url with get parameters in Varnish

I'm having a problem to ban a url inside Varnish (Version 6.0.2).

I'm trying to ban a url like this

/api/v2/product?param1=value1&param2=value2param3=value3

If I give this command:

varnishadm ban req.url '~' '^/api/v2/product'

It works correctly but it bans all the urls that start with /api/v2/product and I need to ban just that specific url.

These are the tries that I've done:

varnishadm ban req.url '~' '^/api/v2/product?param1=value1&param2=value2param3=value3'

It doesn't return any error but it doesn't ban the url

varnishadm ban req.url '~' '^/api/v2/product\?param1=value1'

and I get this error:

Unknown request.
Type 'help' for more info.
Syntax Error: Invalid backslash sequence

Command failed with error code 100

varnishadm ban req.url '~' '^/api/v2/product[?]param1=value1'

or

varnishadm ban req.url '~' '^/api/v2/product\\?param1=value1'

It doesn't return any error but it doesn't ban the url

I've tried also without the Regex using the ==

varnishadm ban req.url '==' '/api/v2/product?param1=value1&param2=value2param3=value3'

It doesn't return any error but it doesn't ban the url

I thought that the problem was the ? so I tried to use the .* instead of the ?

I've tried:

varnishadm ban req.url '~' '^/api/v2/product.*param1=value1'

And it works, it bans all the urls that start with: ^/api/v2/product&param1=value1 so I've tried

varnishadm ban req.url '~' '^/api/v2/product.*param1=value1&param2=value2'

It doesn't return any error but it doesn't ban the url, so I supected that the problem could be the & this time so I've tried:

varnishadm ban req.url '~' '^/api/v2/product.*param1=value1.*param2=value2'

But nothing, it doesn't return errors but it doesn't ban that url.

Any attempt to escape the special character using the \ returns the error message:

Unknown request.
Type 'help' for more info.
Syntax Error: Invalid backslash sequence

Command failed with error code 100

Varnish manual says that the software uses PCRE standards, but I can't find a way to write a regex for it.

Any help or suggestions would be really appreciated.

Thanks H2K

Upvotes: 0

Views: 549

Answers (1)

Herod2k
Herod2k

Reputation: 61

I've found the problem, there was a

set req.url = std.querysort(req.url);

inside the code that was altering the order of my get parameters invalidating the regex.

Upvotes: 1

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