Azure Front Door - Path based routing rule

We see how can we configure the path based routing  using azure front door service within 2 different versions on API. These 2 API are hosted in 2 different azure web app.

I have created 2 web api and hosted the default weather forecast api with core 3.1 with one more entity called version to identify the api version.

Version one api output

Version two api output

Along with it I have added the version in the route of version 2 api as below

[Route("V2/[controller]")]

I have furnished the steps below to achieve the simple Path based routing rule

Step 1: Create 2 web app versiononeapi, versiontwoapi.

Step 2: Create a web api project with core 3.1

Step 3: change the response for the get method in WeatherForecastController as below, make version as V1 and right click on project à publish à Azure à Azure app service windowsà select the subscription, resource group and web app versiononeapi

Step 4: change the response for the get method in WeatherForecastController as below, make version as V2 and right click on project à publish à Azure à Azure app service windowsà select the subscription, resource group and web app versiontwoapi

Step 5: Login to azure portal, search for Front Doors and click add.

Step 6: Configure the basics by selecting the resource group where you have the web app

Step 7: Next we do the Configuration for front door service.

Step 8: Click on frontends/domain add button and provide a name for it, I used versionbasedapirouting. No other changes just add.

Step 9: Now we have to create 2 different pools 
             1)versiononeapibp à add a backend à select app service as host type à in  backend host name select the versiononeapi web app à add à add
             2) versiontwoapibp à add a backend à select app service as host type à in  backend host name select the versiontwoapi web app à add à add

Step 10: Route rule

1)      versiononeapiroute à No change as all our default routes to versiononeapi, just select the versiononeapibp. à add

2)      versiontwoapiroute à in patterns to match replace the existing /* with /V2/*à select versiontwoapibp à add

It would take some 5 to 10 mins to configure after that will check the result.

https:// versionbasedapirouting.azurefd.net/WeatherForecast will give version 1 response

https:// versionbasedapirouting.azurefd.net/V2/WeatherForecast will give version 2 response