Forum Discussion
pgermain_71805
Nimbostratus
NimbostratusURI Rewrite Help
We want to take all requests from a particular IP to a particular URI, and add an additional directory to the URI. We do not want to redirect.
For example, if a request from 2.2.2.2 comes in to /SOAPAPI, I want to rewrite the URI to /SOAPAPI/Test
So far, the iRule I created hasn't worked.
when HTTP_REQUEST {
if { ([IP::client_addr] equals "2.2.2.2") and ([HTTP::uri] starts_with "/SOAPAPI") } {
HTTP::uri "/SOAPAPI/Test[string range $uri 8 end]"
}
}
I lifted this example from DevCentral and I didn't get an error when I created the rule.
The F5 sends a reset when I test it and it doesn't pass the traffic to the inside.
If anybody has some working rules that do the same thing or sees something I am doing wrong, please let me know.
7 Replies
L4L7_53191I believe that the reason why you're getting a reset is that you're referencing a variable that was never set: the $uri variable. Try setting that variable firstset uri [HTTP::uri]
to get rid of the resets, then add some logging to see what is going on. You're on the right track...
-Matt
pgermain_71805Thanks Matt,
I have it working now with [HTTP::uri], plus some other ideas I lifted from other posts...
when HTTP_REQUEST {
start debug
set testuri [HTTP::uri]
log local0.debug "> ****StartURI='$testuri'";
end debug
if { ([IP::client_addr] equals "2.2.2.2") and ([HTTP::uri] starts_with "/SOAPAPI") } {
set variables
set origUri
set origString "/SOAPAPI";
set newString "/SOAPAPI/test";
regsub -all $origString $origUri $newString newUri
start debug
set testuri [HTTP::uri]
log local0.debug "> ****StartURI='$testuri'";
log local0.debug "> ****EndNewURI='$newUri'";
end debug
write the new URI to HTTP session
HTTP::uri $newUri
string replace
}
}
Much Appreciated,
Paul- L4L7_53191Good work! Just as a suggestion, you may consider using string map instead of regsub, as it's way more efficient and CPU friendly. Here's a recent example of its use for a very similar task: http://devcentral.f5.com/Default.aspx?tabid=53&forumid=5&postid=60029&view=topic
-Matt - pgermain_71805That is the very example I lifted it from. I'm not familiar enough with the scripts to take the original scripts (with regsub) and make the changes suggested in the followup posts.
I'll work at rewriting it.
Paul - pgermain_71805Also, the suggestion in that post uses a redirect instead of a rewrite. I'll search some more on string map.
- L4L7_53191I think something like this may work for you (untested, syntax or otherwise):
set newURI [string map {"/SOAPAPI" "/SOAPAPI/test"} [HTTP::uri]]
Good luck!
-Matt - pgermain_71805Matt,
You are a master. I used that and removed the debugging commands for a short and sweet script.
when HTTP_REQUEST {
if { ([IP::addr [IP::client_addr]/28 equals 216.57.132.112]) and ([HTTP::uri] starts_with "/SOAPAPI") } {
set variables
set newUri [string map {"/SOAPAPI" "/SOAPAPI/barclays"} [HTTP::uri]]
write the new URI to HTTP session
HTTP::uri $newUri
string replace
}
}
Thanks A Million,
Paul
