Forum Discussion
netadmindetail_
Nimbostratus
NimbostratusBetter way to Cleaning UP string variable
Hi all
I must use the destination FQND of a TCP connection. I'm able to collect the TCP payload but I need to compare it with a data-class. But before doing that I need to clean the TCP payloa...
How about using scan?
If the variable string is set '9net.tcp://sub.domain.com:12345/abcdefg' or 'sometotherstuff9net.tcp://sub.domain.com:12345/abcdefg/lkjsdflkj/sdfl' etc then try using
scan $string {%*[^/]//%[^:]} fqdn
this results in a new variable $fqdn of 'sub.domain.com'
You can test it out by using the tclsh
% set string "lkasdflkjwe234239net.tcp://sub.domain.com:12345/abcdefg/sdlfkjasf" lkasdflkjwe234239net.tcp://sub.domain.com:12345/abcdefg/sdlfkjasf % puts $string lkasdflkjwe234239net.tcp://sub.domain.com:12345/abcdefg/sdlfkjasf % scan $string {%*[^/]//%[^:]} fqdn 1 % puts $fqdn sub.domain.comCheck out this link: https://devcentral.f5.com/articles/irules-101-18revisiting-the-tcl-scan-command
FYI I'm just starting to play with scan so YMMV.
Sheigh
Sheigh_65772
Cirrus
CirrusQuick time comparison of the two:
% time { set fqdn [string range $string [expr [string first "://" $string] + 3] [expr [string last ":" $string] - 1]] } 10000
5.7755 microseconds per iteration
% time { scan $string {%*[^:]://%[^:]} fqdn } 10000
1.2681 microseconds per iteration
netadmindetail_Wow, thank you very much for this kind of output. Can you tell me how you've been able to grab this information ? Is this the time keyword ? how do you stop the timer ?- Sheigh_65772So that was all from within the tclsh shell. From your f5 device just type tclsh and you'll drop in. The time command just takes what you want to run and runs it the number of times you specify: time { your commands } itterations