Forum Discussion
kmtmt_51646
Nimbostratus
NimbostratusHow to extra strings inside "class match"
Hi Dev members,
Let me ask about "class match" function.
Here's my Data Group:
============
ltm data-group internal /Common/testgroup1 {
records {
/test { }
}
type string
}
ltm data-group internal /Common/testgroup2 {
records {
/test/ { }
}
type string
}
============
and my iRule
============
when HTTP_REQUEST {
if { [class match -- [HTTP::uri] equals testgroup1] || [class match -- [HTTP::uri] starts_with testgroup2] }{
pool pool-true
} else
pool pool-false
}
============
1)
I need to deted following Paths by iRules with Data Group and send to pool-true:
a) http://www.example.com/test
b) http://www.example.com/test/index.html
c) http://www.example.com/directory/test/index.html
d) http://www.example.com/testing/index.html
my iRule works fine but I need to have 2 Data Groups and tough to maintain both, so I wonder if can add "/" after DataGroup somehow inside iRule.
For example:
============
when HTTP_REQUEST {
if { [class match -- [HTTP::uri] equals testgroup1] || [class match -- [HTTP::uri] starts_with "testgroup1/"] }{
pool pool-true
============
Does anyone have ideas?
Thank you very much,
kmtmt
8 Replies
hoolioCirrostratus
Hi kmtmt,
You could combine the data group so that you'd have /test and /test/ in one data group. Another option would be to remove any trailing forward slashes before you do the class lookup against one data group without the trailing forward slashes:
if { [class match -- [string trimright [HTTP::uri] "/"] equals testgroup1] }{
Aaron
kmtmt_51646Hi hoolio,
Thank you for your reply!
And let me correct what I wrote
>a) http://www.example.com/test
>b) http://www.example.com/test/index.html
>c) http://www.example.com/directory/test/index.html
>d) http://www.example.com/testing/index.html
-> a) and b) is correct URL to be sent to pool-true, but c) and d) are false, which is to be sent to pool-false.
as you advise, I can put "/test" and "/test/" into 1 datagroup, but then I can use either "equals" or "start_with", and if I do "start_with /test || /test/", above URL d) will be false-positive...
trimright sounds a very nice idea, but again, I cannot differentiate b) and d) .
So I trimright datagroup as follows. Didn't get any error, but it seems not working to trimright datagroup...
=========
when HTTP_REQUEST {
if { [class match -- [HTTP::uri] starts_with testgroup2] || [class match -- [HTTP::uri] equals [string trimright "testgroup2" "/"]]}{
pool pool-true
} else {
=========
I guess I should do with 2 datagroups...
Thank you anyway!
kmtmt
What_Lies_Bene1You should be using trimright with the URI, not the Data Group. Regardless, if you use 'equals' then a single Data Group will suffice no?- hoolioSo you could explicitly list /test, /test/ and /test/index.html in the data group and use the exact client URI for the lookup:
if { [class match -- [HTTP::path] equals testgroup2]}{
Or you could remove the trailing slash from the data group entries and trim the client's requested URI during the class lookup:
if { [class match -- [string trimright [HTTP::path] "/" ] starts_with testgroup2]}{
Note that I've used [HTTP::path] to get just the requested path without the query string in the URI for the lookup.
Aaron - kmtmt_51646Hi What Lies Beneath, Aaron,
Thank you for your reply and sample code!
/test/ can only be the first directory, and if it comes to second I'd like to ignore it like this:
>c) http://www.example.com/directory/test/index.html
so I believe I need to have "start_with" instead of having only "equals".
> if { [class match -- [string trimright [HTTP::path] "/" ] starts_with testgroup2]}{
hmmm...
I thought [HTTP::path] can have file name as well, so "d) http://www.example.com/testing/index.html" will be "/testing/index.html"
Please kindly tell me if I'm wrong.
Thank you very much! - What_Lies_Bene1Yes, 'starts_with' would probably be best.
And yes, HTTP::path does indeed contain the file name; actually anything up to the first ? - kmtmt_51646Hi Steve,
Thank you for your reply!
I ended up with 2 data groups with and without slash at the last, my iRule looks like :
if {[class match -- [HTTP::path] starts_with Directory_slash] || [class match -- [HTTP::path] equals Directory_noslash]} {
Thank you for everyone who gave me advice and help!
Best Regards,
kmtmt - What_Lies_Bene1You're very welcome.
