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mtobkes_64700's avatar
mtobkes_64700
Icon for Nimbostratus rankNimbostratus
Oct 23, 2014

iRule - Prepend Path to URI

Hoping someone can point me in the right direction...

 

I need to prepend /abc to all requests to www.host.com. I cannot use redirects.

 

Request: www.host.com/testing

 

Needs to hit the server as: www.host.com/abc/testing

 

I was thinking this may work but it doesn't:

 

if { [HTTP::host] starts_with "www.host.com"}{ HTTP::uri [string map {"[HTTP::uri]" "/abc[HTTP::uri]"} [HTTP::uri]] }

 

Any help is much appreciated!

 

application delivery
devops
iRules
  • mimlo_61970's avatar
    mimlo_61970
    Oct 23, 2014

    For reasons I can't explain, string map is not matching [HTTP::uri]

    Since this is a simple prepend, you could do this instead

    when HTTP_REQUEST {
    if { [HTTP::host] starts_with "www.host.com"}{
        HTTP::uri "/abc[HTTP::uri]"
    }
}
  • mimlo_61970's avatar
    mimlo_61970
    Icon for Cumulonimbus rankCumulonimbus
    Oct 23, 2014

    For reasons I can't explain, string map is not matching [HTTP::uri]

    Since this is a simple prepend, you could do this instead

    when HTTP_REQUEST {
    if { [HTTP::host] starts_with "www.host.com"}{
        HTTP::uri "/abc[HTTP::uri]"
    }
}
    • mimlo_61970's avatar
      mimlo_61970
      Icon for Cumulonimbus rankCumulonimbus
      Oct 23, 2014
      Apparently curly braces prevent string expansion in TCL? https://devcentral.f5.com/s/feed/0D51T00006j4QMgSAM Try HTTP::uri [string map "[HTTP::uri] /abc[HTTP::uri]" [HTTP::uri]]
    • mtobkes_64700's avatar
      mtobkes_64700
      Icon for Nimbostratus rankNimbostratus
      Oct 23, 2014
      Thanks mimlo, that's exactly what I was looking for! No need to perform string map. Thanks
  • Muhammad_Irfan1's avatar
    Muhammad_Irfan1
    Icon for Cirrus rankCirrus
    Oct 24, 2014

    What if I want exactly the opposite. I want the VS which is http://10.50.170.1:80/test/Services/SecureAdapters/AndroidWidget/Interface/GetMSISDNAndBundleInformation-SOAP

     

    should hit the pool as

     

    http://10.50.169.14:11040/Services/SecureAdapters/AndroidWidget/Interface/GetMSISDNAndBundleInformation-SOAP

     

    http://10.50.169.16:11040/Services/SecureAdapters/AndroidWidget/Interface/GetMSISDNAndBundleInformation-SOAP

     

    For example the above pool name is F5. I want iRule to select this pool on the URI /test but remove the word /test when send to pool.

     

  • mimlo_61970's avatar
    mimlo_61970
    Icon for Cumulonimbus rankCumulonimbus
    Oct 24, 2014

    In its simplest form, that would be

    when HTTP_REQUEST {
    HTTP::uri [string map {"/test" "" } [HTTP::uri]]
}

    Not sure if you need to make sure it starts with /test, or only applies to some host headers or what not, but that will remove /test from the URI

    • Muhammad_Irfan1's avatar
      Muhammad_Irfan1
      Icon for Cirrus rankCirrus
      Oct 24, 2014
      Great but not only I want to remove it from the URL but I want to select a pool on the basis of /test. Just like proxypass works in Apache. It decides a pool on the basis of first word in URL like http://10.50.171.8:80/test/Services..................... now VS will select a pool name TEST(or what ever) and omit the work /test from the url and send it to pool TEST. I will be always grateful if you combine this with your last comment.
  • mimlo_61970's avatar
    mimlo_61970
    Icon for Cumulonimbus rankCumulonimbus
    Oct 24, 2014

    This should remove the /test and select the pool POOL_NAME

    when HTTP_REQUEST {
    set uri [string tolower [HTTP::uri]]
    if { $uri starts_with "/test" } {
        HTTP::uri [string map {"/test" "" } $uri ]
        pool POOL_NAME
    }
}
    • Muhammad_Irfan1's avatar
      Muhammad_Irfan1
      Icon for Cirrus rankCirrus
      Oct 25, 2014
      As my URl are case sensitive so made little change when HTTP_REQUEST { set uri [HTTP::uri] if { $uri starts_with "/CRM" } { HTTP::uri [string map {"/CRM" "" } $uri ] pool Tibco-LB-Group4 } } This is working for me Please check if the set statement is right? Please can you add a statement which will log all the requests to external log server for example the ip of the log server is 10.50.242.239. You made my day sir.
    • Muhammad_Irfan1's avatar
      Muhammad_Irfan1
      Icon for Cirrus rankCirrus
      Oct 25, 2014
      I only want to remove /CRM at the start of URI and if it occurs again in the URL iRule should not remove it it. How can i do that. final requirement. Please
    • kunjan's avatar
      kunjan
      Icon for Nimbostratus rankNimbostratus
      Oct 26, 2014
      set index [string first "/CMS" [HTTP::uri]] set uri [string replace [HTTP::uri] $index [expr $index+4] ] HTTP::uri $uri