appgw - homepage only redirect but other forward to backend

Question

appgw - homepage only redirect but other forward to backend

srinu P 1

Hi, we have url setup on azure app gateway with backend pool. need to redirect ONLY homepage to specific path but all other uri paths should go to backend pool. I tried with path based rule but its taking /* it means all ur's after / rediecting to that path but i want only equal homepage redirect. is that doable .

GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2022-11-15T13:01:13.893+00:00
Hello @srinu P ,

Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.

When you says "redirect ONLY homepage to specific path", do you want to rewrite the URL for the home page?
If yes, URL rewrite feature of Application gateway might help in this case.
Refer : https://learn.microsoft.com/en-us/azure/application-gateway/rewrite-http-headers-url
https://learn.microsoft.com/en-us/azure/application-gateway/rewrite-url-portal

NOTE :

For a URL rewrite, Application Gateway rewrites the URL before the request is sent to the backend. This won't change what users see in the browser because the changes are hidden from the user.

For a URL redirect, Application Gateway sends a redirect response to the client with the new URL. That, in turn, requires the client to resend its request to the new URL provided in the redirect. The URL that the user sees in the browser will update to the new URL.

So, could you please clarify what is your exact requirement?

Regards,
Gita
srinu P 1 Reputation point

2022-11-15T16:23:19.357+00:00

Hi , This one i am looking for. For a URL redirect, Application Gateway sends a redirect response to the client with the new URL. That, in turn, requires the client to resend its request to the new URL provided in the redirect. The URL that the user sees in the browser will update to the new URL. But here i need https://Hostname/ => https://Hostname/something but in app gateway i see only /* which means everything is redirecting to that url, which shouldn't.
srinu P 1 Reputation point

2022-11-15T17:51:34.323+00:00

i wrote the rewrite rule as per the link https://learn.microsoft.com/en-us/azure/application-gateway/rewrite-url-portal
but its redirecting everything again to new uri path. Even if i put hostname/something its redirecting to new path which shouldn't. Only homepage(/) should be redirected to certain path.
srinu P 1 Reputation point

2022-11-15T17:53:29.13+00:00

Requirement is

hostanme.com/ -> hostname.com/ecom/spid/
hostname.com/[anything] -> backend pool
GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2022-11-17T14:46:11.387+00:00

Hello @srinu P ,

AFAIK, the requirement you mentioned above is not possible but let me discuss this with the Application gateway Product Group team and get a confirmation on same.
I'll get back to you as soon as I have some updates on it.

Regards,
Gita

1 answer

Your answer

GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2022-11-15T13:01:13.893+00:00

Hello @srinu P ,

Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.

When you says "redirect ONLY homepage to specific path", do you want to rewrite the URL for the home page?
If yes, URL rewrite feature of Application gateway might help in this case.
Refer : https://learn.microsoft.com/en-us/azure/application-gateway/rewrite-http-headers-url
https://learn.microsoft.com/en-us/azure/application-gateway/rewrite-url-portal

NOTE :

For a URL rewrite, Application Gateway rewrites the URL before the request is sent to the backend. This won't change what users see in the browser because the changes are hidden from the user.

For a URL redirect, Application Gateway sends a redirect response to the client with the new URL. That, in turn, requires the client to resend its request to the new URL provided in the redirect. The URL that the user sees in the browser will update to the new URL.

So, could you please clarify what is your exact requirement?

Regards,
Gita
srinu P 1 Reputation point

2022-11-15T16:23:19.357+00:00

Hi , This one i am looking for. For a URL redirect, Application Gateway sends a redirect response to the client with the new URL. That, in turn, requires the client to resend its request to the new URL provided in the redirect. The URL that the user sees in the browser will update to the new URL. But here i need https://Hostname/ => https://Hostname/something but in app gateway i see only /* which means everything is redirecting to that url, which shouldn't.
srinu P 1 Reputation point

2022-11-15T17:51:34.323+00:00

i wrote the rewrite rule as per the link https://learn.microsoft.com/en-us/azure/application-gateway/rewrite-url-portal
but its redirecting everything again to new uri path. Even if i put hostname/something its redirecting to new path which shouldn't. Only homepage(/) should be redirected to certain path.
srinu P 1 Reputation point

2022-11-15T17:53:29.13+00:00

Requirement is

hostanme.com/ -> hostname.com/ecom/spid/
hostname.com/[anything] -> backend pool
GitaraniSharma-MSFT 50,096 Reputation points Microsoft Employee Moderator

2022-11-17T14:46:11.387+00:00

Hello @srinu P ,

AFAIK, the requirement you mentioned above is not possible but let me discuss this with the Application gateway Product Group team and get a confirmation on same.
I'll get back to you as soon as I have some updates on it.

Regards,
Gita

Answer 1

Hello @srinu P ,

I understand you have URL setup on Azure Application gateway with backend pool and needed to redirect ONLY the homepage to specific path, but all other URI paths should go to backend pool. You tried with path-based rule but it was taking /* meaning all uri's after / redirecting to that path. You also wrote a rewrite rule but it was redirecting everything again to new URI path. Your requirement is:
hostname.com/ -> hostname.com/ecom/spid/
hostname.com/[anything] -> backend pool

I discussed this with the Azure Application gateway Product Group team and below is their response:

This isn’t possible via redirect rules out of box, but can be possible via workaround (albeit a bit inefficient, but possible).

1) Create a new rewrite rule to change any request for “/” to be rewritten with a placeholder path and have the path-map reevaluated.

2) Create a redirect rule for the fictitious path to redirect to the proper path via external website reference.

Kindly let us know if the above helps or you need further assistance on this issue.

Please "Accept the answer" if the information helped you. This will help us and others in the community as well.

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appgw - homepage only redirect but other forward to backend

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