Replicate Netscaler rewrite rule on AppGW

Question

Replicate Netscaler rewrite rule on AppGW

Mark Fuller 42

My customer has a rewrite rule for onprem Sharepoint in Citrix Netscaler per below that I need to translate into AppGW because I am migrating their onprem Sharepoint to Azure and replacing Netscaler with AppGW. I do not know how to translate this into AppGW rewrite rule?

IF HTTP.RES.HEADER(\"X-SharePointHealthScore\").CONTAINS(\"8\")||HTTP.RES.HEADER(\"X-SharePointHealthScore\").CONTAINS(\"9\")||HTTP.RES.HEADER(\"X-SharePointHealthScore\").CONTAINS(\"10\")
THEN insert_http_header Set-Cookie "\"Load=\" + HTTP.RES.HEADER(\"X-SharePointHealthScore\").NORMALIZE_URL + \";expires=\" + SYS.TIME.ADD(14).TYPECAST_TIME_AT"

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Answer 1

KapilAnanth-MSFT 49,611 Microsoft Employee Moderator

Hi @Anonymous ,

Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well.
I understand that you would like to replicate Rewrite Rule from Netscaler to AppGateway.

Looking at the complexity of the requirement, I think we will need a specialized 1:1 session, where a support engineer can have a screen share session to pinpoint the issue. If you have a support plan you may file a support ticket, else please do let us know, we will try and help you get a one-time free technical support.

Cheers,
Kapil

Mark Fuller 42 Reputation points

2022-12-22T00:36:45.533+00:00
I discussed with the customer and they also dont know why that config is in the Netscaler. Current approach is going to be to leave it out of AppGW and see what happens. However i did some more research and believe I have something that may work:

IF [http response custom header] X-SharePointHealthScore == 8|9|10
THEN set [response common header] Set-Cookie “Load={http_resp_ X-SharePointHealthScore}; Max-Age=14”

Notes

Using Max-Age instead of Expires for Set-Cookie function.

I am guessing that the NORMALIZE_URL function added to the HTTP.RES.HEADER(\"X-SharePointHealthScore\") does not actually do anything, because HTTP.RES.HEADER(\"X-SharePointHealthScore\") returns the value of the X-SharePointHealthScore header, not a URL.
KapilAnanth-MSFT 49,611 Reputation points Microsoft Employee Moderator

2022-12-22T06:29:16.047+00:00

Hi @Anonymous ,

Looking at the condition, I believe it should be something like the below,

I am not exactly sure about the "Then" part of the script.
However, if you believe your research is correct about the functionality, then you can go ahead and give it a try.

Let us know if that works or not.

Cheers,
Kapil.

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Replicate Netscaler rewrite rule on AppGW

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