Forum Discussion
Chris_Stamm_183
Nimbostratus
Nimbostratushttp class profile and trailing /
I have one VIP. DNS would resolve this VIP as such. 10.1.1.1 = www.abc.com
VIP: 10.1.1.1:80
To keep it simple let's say I have three http class profiles configured below.
Httpclass1
Look for host name regex string (?i)www.abc.com
Look for URI regex string (?i)uri1
If both are matched then send to Pool1
Httpclass2 Look for host name regex string (?i)www.abc.com
Look for URI regex string (?i)uri2
If both are matched then send to Pool2
Httpclass3
Look for host name regex string (?i)www.abc.com
If matched then send to Pool3
The idea is that if a person types www.abc.com/uri1 (or other variations www.abc.com/uri1/ www.abc.com/uri1/test.html etc.) they are sent to Pool1. If they send www.abc.com/uri2 they are sent to Pool2. The last http class (httpclass3) is a catch all for the domain www.abc.com. I am matching host because eventually there will be more than one host so I would want to be able to match host and URI then make the decision.
So - the problem is that the user has to type a trailing slash www.abc.com/uri1/ or www.abc.com/uri2/ otherwise it will not catch the string. If the user just types www.abc.com/uri1 or www.abc.com/uri2 then it misses the catch with httpclass1 and httpclass2 so it sends to the catch all http class (httpclass3) and the desired effect is lost.
Am I doing something wrong in my URI match in the http class?
I have tried all of the following...
/uri1 (pattern string)
/uri1* (pattern string)
uri1 (pattern string)
uri1* (pattern string)
(?1)/uri1 (regex)
(?1)/uri1* (regex)
(?1)uri1* (regex)
and none seem to work it always requires the trailing /
6 Replies
L4L7_53191Chris: for this particular task I'd actually suggest going the iRule route. Do a search on uri switching and you'll see a bunch of examples. I'd suggest using the switch -glob command for this as well. Have a look here for the general idea (look at the second example on URI switching):
http://devcentral.f5.com/wiki/default.aspx/iRules/switch.html
-Matt
Chris_Stamm_183Is it more efficient?
After days of searching for answers I just barely came accross this post and created an http profile with matching enabled on the redirect rewrite and that fixed the problem.
http://devcentral.f5.com/Community/GroupDetails/tabid/1082223/asg/50/afv/topic/aft/32808/aff/5/showtab/groupforums/Default.aspx
I am going to read up on the redirect rewrite and learn more about it to make sure it does not have any other adverse affects.
hoolioCirrostratus
Hi Chris,
Nice work. If rewrite redirects solves the issue, it would be a lot more efficient than coming up with complicated regexes for your HTTP class filters.
Aaron- Chris_Stamm_183With that part working I have another related issue that surfaced. Because we redirect to a different pool on the backend based on the URI that particular URI is sent back unaltered to the backend server - for example...
http://www.abc.com/ur1/default.html is sent to a backend pool member as http://10.2.2.1/uri1/default.html
If the base path of the webserver is / then I would need a directory in there called uri1 where i placed all the files (i.e. /uri1/default.html, /uri1/whatever.html)
In the http class there is a rewrite URI option but I cannot find any documentation on stripping off the /uri1 so the path to the backend server would be http://10.2.2.1/default.html (ideal) as opposed to http://10.2.2.1/uri1/default.html (not ideal).
Any ideas where I can find this documentation? - hoolioYou can use standard TCL commands in the rewrite field:
[string map {/uri1/ /} [HTTP::uri]]
For more info see SOL7771:
SOL7771: Rewriting URIs using the HTTP class profile
http://support.f5.com/kb/en-us/solutions/public/7000/700/sol7771.html
Aaron - Chris_Stamm_183Worked famously.
Cheers
