Host redirection not working for second host in iRule

[Preet_pk]

Hi,

There is one issue i am facing in redirection - For eg below is the scenerio.

test.com  -> https://test.com/redlab/login.html

lab.com -> https://lab.com/bluelab/login.html

We are using single Virtual Server & HTTP::host based irule for backend Pool connectivity.

Tried below irule for redirection - but redirection is working only for first host domain & is not working for second host domain ( for lab.com )

when HTTP_REQUEST {
if {[HTTP::host] equals "test.com" and [HTTP::uri] equals "/"} {
HTTP::redirect "https://test.com/redlab/login.htmll"
if {[HTTP::host] equals "lab.com" and [HTTP::uri] equals "/"} {
HTTP::redirect "https://lab.com/bluelab/login.html"}
}
}

Please let me know, if any modification to be done on abve irule for second host redirection also to work.

[Daniel_Wolf]

Hi @Preet_pk, 

this iRule will satisfy your requirements:

when HTTP_REQUEST {
    if { [string tolower [HTTP::host][HTTP::path]] equals "domain-alpha.com.com/" } {
        HTTP::respond 301 -version 1.1 noserver Location "https://domain-alpha.com.com/redlab/login.html"
    } elseif { [string tolower [HTTP::host][HTTP::path]] equals "domain-beta.com.com/" } {
        HTTP::respond 301 -version 1.1 noserver Location "https://domain-beta.com.com/bluelab/login.html"
    } else {
      #default action
    }
}

• The 301 response code indicates that the requested page has been permanently moved to the URL given in the Location header.
• -version 1.1 will set HTTP/1.1 (otherwise HTTP/1.0 would be used).
• noserver will prevent that the default server header (configured in HTTP profile, usually BigIP) is returned to the client.

I use HTTP::respond instead of HTTP::redirect, because:
HTTP::respond can use 301 / Moved Permanently
HTTP::redirect will alsways use 302 / Found or Temporary Moved

Hope this helps and happy F5 day
Daniel

[Nikoolayy1 · Accepted solution]

You may try @Daniel_Wolf  solution but your iRule has clear mistakes as the second "if" statement is in the first "if" statemet.

when HTTP_REQUEST {

if {[HTTP::host] equals "test.com" and [HTTP::uri] equals "/"} {
HTTP::redirect "https://test.com/redlab/login.htmll" }
if {[HTTP::host] equals "lab.com" and [HTTP::uri] equals "/"} {
HTTP::redirect "https://lab.com/bluelab/login.html"}
}

or even better

when HTTP_REQUEST {

if {[HTTP::host] equals "test.com" and [HTTP::uri] equals "/"} {
HTTP::redirect "https://test.com/redlab/login.htmll"
}elseif {[HTTP::host] equals "lab.com" and [HTTP::uri] equals "/"} {
HTTP::redirect "https://lab.com/bluelab/login.html"}
}

Alse this free article for writting irules (the "then" statement is just optional):

https://community.f5.com/t5/technical-articles/irules-101-02-if-and-expressions/ta-p/283431