Forum Discussion
veredgfbll
Cirrus
CirrusHelp with irule using switch
I need an irule that does the following -
If host name equals xxx.com and uri equals /yyy redirect to xxy.com....
but I need to switch between 6 different URIs - I want to use the SWITCH command but I'm not sure how to combine it with the first condition... (The host is constant).
Thanks
veredgfbll I believe what you're looking for is the following. Please keep in mind that you do not have to have the final else or the default action in the switch statement and these are just options if by chance you do have a default action you want to perform for the if statement if it doesn't match or the URI path for the single host match.
when HTTP_REQUEST priority 500 { set URI [string tolower [HTTP::uri]] if { [HTTP::host] == "xxx.com" } { switch -- ${URI} { "/yyy" { # can change http to https if you need to redirect to HTTPS instead HTTP::redirect "http://xxy.com/" } "uri_2" { # URI 2 action to execute } "uri_3" { # URI 3 action to execute } "uri_4" { # URI 4 action to execute } "uri_5" { # URI 5 action to execute } "uri_6" { # URI 6 action to execute } default { # default action to perform if URI doesn't match } } } else { # action to perform if HTTP::host doesn't match } }veredgfbll The iRule you created can be configured as the following which you will notice the "default" match is completely removed since you don't want to perform any other action other than what the iRule and virtual server will already do if a match isn't found.
when HTTP_REQUEST priority 500 { set URI [string tolower [HTTP::uri]] if { [HTTP::host] == "www.hostname.com" } { switch -- ${URI} { "/aaa" { HTTP::respond 302 Location "https://www.test.com/aaa" #log local0. "redirect to https://www.test.com2/aaa completed" } "/aab" { HTTP::respond 302 Location "https://www.test.com/aab" #log local0. "redirect to https://www.test.com2/aab completed" } "/aac" { HTTP::respond 302 Location "https://www.test.com/aac" #log local0. "redirect to https://www.test.com2/aac completed" } "/aad" { HTTP::respond 302 Location "https://www.test.com/aad" #log local0. "redirect to https://www.test.com2/aad completed" } "/aae" { HTTP::respond 302 Location "https://www.test.com/aae" #log local0. "redirect to https://www.test.com2/aae completed" } "/aaf" { HTTP::respond 302 Location "https://www.test.com/aaf" #log local0. "redirect to https://www.test.com2/aaf completed" } "/aag" { HTTP::respond 302 Location "https://www.test.com/aag" #log local0. "redirect to https://www.test.com2/aag completed" } } } }
- whisperer
MVP
Well, each time the iRule triggers on the HTTP access, the http request method is triggered. For each trigger or request, the hostname and path would be static. So, why not perform the following:
- Combine the host header and URL bits into a normalized string. Store this in a variable you declare.
- Use the switch statement, and perform a test against this variable. Please see https://community.f5.com/t5/technical-articles/irules-101-04-switch/ta-p/283316.
- Paulius
veredgfbll I believe what you're looking for is the following. Please keep in mind that you do not have to have the final else or the default action in the switch statement and these are just options if by chance you do have a default action you want to perform for the if statement if it doesn't match or the URI path for the single host match.
when HTTP_REQUEST priority 500 { set URI [string tolower [HTTP::uri]] if { [HTTP::host] == "xxx.com" } { switch -- ${URI} { "/yyy" { # can change http to https if you need to redirect to HTTPS instead HTTP::redirect "http://xxy.com/" } "uri_2" { # URI 2 action to execute } "uri_3" { # URI 3 action to execute } "uri_4" { # URI 4 action to execute } "uri_5" { # URI 5 action to execute } "uri_6" { # URI 6 action to execute } default { # default action to perform if URI doesn't match } } } else { # action to perform if HTTP::host doesn't match } }
veredgfbllHi, This seems good - can I use the "return" command as the default option? (I'd rather have an option to continue as normal)... not quite sure what the default means here... is it like the else option?
Like this?
when HTTP_REQUEST { if {[HTTP::has_responded]} { return } set URI [string tolower [HTTP::uri]] if { [HTTP::host] == "www.hostname.com" } { switch -- ${URI} { "/aaa" { HTTP::respond 302 Location "https://www.test.com/aaa" #log local0. "redirect to https://www.test.com2/aaa completed" } "/aab" { HTTP::respond 302 Location "https://www.test.com/aab" #log local0. "redirect to https://www.test.com2/aab completed" } "/aac" { HTTP::respond 302 Location "https://www.test.com/aac" #log local0. "redirect to https://www.test.com2/aac completed" } "/aad" { HTTP::respond 302 Location "https://www.test.com/aad" #log local0. "redirect to https://www.test.com2/aad completed" } "/aae" { HTTP::respond 302 Location "https://www.test.com/aae" #log local0. "redirect to https://www.test.com2/aae completed" } "/aaf" { HTTP::respond 302 Location "https://www.test.com/aaf" #log local0. "redirect to https://www.test.com2/aaf completed" } "/aag" { HTTP::respond 302 Location "https://www.test.com/aag" #log local0. "redirect to https://www.test.com2/aag completed" } default { # default action to perform if URI doesn't match return } } } }Thanks
- Paulius
veredgfbll You can do that but you don't have to because the default action without defining a section called "default" would be to proceed as normal. This applies to the else in an if else statement, if you didn't define an else action the iRule would continue on as normal.
