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marvn_58503's avatar
marvn_58503
Icon for Nimbostratus rankNimbostratus
Oct 23, 2013
Solved

What is the correct way to script multiple newline characters in iApp (to create a monitor)

I have a HTTP monitor which requires a \r\n\r\n at the end. For the life of me, I cannot fix the syntax on this. I end up with the following debugs in /var/tmp/scriptd.out (sanitised obviously). ...
devops
iApps
  • Fred_Slater_856's avatar
    Fred_Slater_856
    Oct 23, 2013

    The 11.4 f5.http template uses the following: 

    'GET $::monitor__uri HTTP/1.1\\r\\nHost: $hostname\\r\\nConnection: Close\\r\\n\\r\\n'
    The extra backslash is consumed within the iApp, and the result is correct. It does not use app_utils.

Fred_Slater_856's avatar
Fred_Slater_856
Historic F5 Account
Oct 23, 2013

The 11.4 f5.http template uses the following: 

'GET $::monitor__uri HTTP/1.1\\r\\nHost: $hostname\\r\\nConnection: Close\\r\\n\\r\\n'
The extra backslash is consumed within the iApp, and the result is correct. It does not use app_utils.

  • marvn_58503's avatar
    marvn_58503
    Icon for Nimbostratus rankNimbostratus
    Nov 19, 2013
    Just coming back to this - I can confirm that it seems app_utils will not correctly handle multiple \r\n characters and you have to create it manually using ltm_create. I'm finding so many limitations in app_utils I'm wondering why bother using it at all. Marking as answer.
  • Fred_Slater_856's avatar
    Fred_Slater_856
    Historic F5 Account
    Nov 19, 2013
    We agree, and we deprecated app_utils in 11.4. It's still there for backward compatibility, but the F5 iApps all use the new iapp:: tcl package instead. It is documented here https://clouddocs.f5.com/api/iapps/iApp-Utility-Package.html, and you can find examples by looking at f5.http in 11.4.