Get list of actual Azure Function endpoints from Powershell

Question

I'm trying to get a full list of function endpoints in my Azure function app from a Powershell script. I can get the list of functions from the management.azure.com API, but it just has the function name, like...

/subscriptions/ea4a3766-c3a8-4b9c-xxxx-xxxxxxxxxxxx/resourceGroups/MyResourceGroup/providers/Microsoft.Web/sites/MyFunctionAppName/functions/FunctionName

But the function actually has an endpoint of (for instance) http://myfunctionapp.azurewebsites.net/api/allsources/{sourceName}

How can I get that endpoint name from the Azure management API from Powershell? It's displayed in the "Get Function URL" button on the portal, so I would imagine it has to be there somewhere.

EDIT: The suggested duplicate still doesn't provide the actual function endpoint. For instance, I have a function called CheckLock. Its endpoint per the "Get Function URL" button on the portal (and the one that I want) is: https://myfunctionapp.azurewebsites.net/api/account/lock/{id}?code=myfunctioncode

What I'm getting from the suggested duplicate is:

@{
name=CheckLock; 
function_app_id=/subscriptions/ea4a3766-c3a8-xxxx-xxxx-xxxxxxxxxxxx/resourceGroups/myresourcegroup/providers/Microsoft.Web/sites/myfunctionappname;
script_root_path_href=https://myfunctionappname.scm.azurewebsites.net/api/vfs/site/wwwroot/CheckLock/; 
script_href=https://myfunctionappname.scm.azurewebsites.net/api/vfs/site/wwwroot/bin/Funcs.dll; 
config_href=https://myfunctionappname.scm.azurewebsites.net/api/vfs/site/wwwroot/CheckLock/function.json; 
secrets_file_href=https://myfunctionappname.scm.azurewebsites.net/api/vfs/data/functions/secrets/CheckLock.json; 
href=https://myfunctionappname.scm.azurewebsites.net/api/functions/CheckLock;
config=; 
files=; 
test_data=
} 

Answer 1

I got it. In the data for the function itself, the route is part of the properties.config object.

Request should look like this: https://management.azure.com/subscriptions/{subscriptionid}/resourceGroups/{resourceGroupName}/providers/Microsoft.Web/sites/{functionAppName}/functions/{functionName}?api-version=2016-08-01

In the return value is a properties object, and within that is config object. Underneath that is the route property which contains the trigger endpoint.

In Powershell, it's this:

$functionData = Invoke-RestMethod -Method Get -Uri $functionName -Headers $accessTokenHeader
$triggerUrl = "https://$functionAppName.azurewebsites.net/api/" + $functionData.properties.config.route

You can test it here: https://learn.microsoft.com/en-us/rest/api/appservice/webapps/getfunction

Hope this helps someone else! Thanks to those who contributed.

Answer 2

AZ PowerShell has introduced the Invoke-AzResourceAction cmdlet. This does exactly what it says on the tin - it allows you to invoke an action against an Azure Resource.

It's possible to get a Function Key and URL through the listkeys action as follows -

$functionApp = Get-AzWebAppSlot -Name $FunctionAppName -ResourceGroup $ResourceGroupName -Slot $Slot
$functionSecrets = Invoke-AzResourceAction -ResourceId ("{0}/functions/{1}" -f $functionApp.Id, $FunctionName) -Action "listkeys" -ApiVersion "2019-08-01" -Force

The variable $functionSecrets now contains two properties -

• key: The default function-level key (will only work for $FunctionName).
• trigger_url: The URL to trigger $FunctionName. Note that this property does not honour custom routes.

Answer 3

The url you can get via Get Function URL named trigger_url, seems you could not be able to get all of them in a function app, but you can get it for one specific function, See : Web Apps - List Function Secrets, the trigger_url in the response body is what you want.

POST https://management.azure.com/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Web/sites/{name}/functions/{functionName}/listsecrets?api-version=2016-08-01

Response body:

 {
   "key": "xxxxxxxxxxxxxxxxxxx",
   "trigger_url": "https://xxxxx.azurewebsites.net/api/HttpTrigger1?code=xxxxxxxxxxxxxxx"
 }

Note: If you get an error like below, you need to add an application setting AzureWebJobsSecretStorageType : Files for your function app.

{
  "error": {
    "code": "Conflict",
    "message": "System.InvalidOperationException: Runtime keys are stored on blob storage. This API doesn't support this configuration. Please change Environment variable AzureWebJobsSecretStorageType value to 'Files'. For more info, visit https://aka.ms/funcsecrets\r\n   at Kudu.Core.Functions.FunctionManager.<GetKeyObjectFromFile>d__9`1.MoveNext() in C:\\Kudu Files\\Private\\src\\master\\Kudu.Core\\Functions\\FunctionManager.cs:line 141\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Kudu.Core.Functions.FunctionManager.<GetFunctionSecretsAsync>d__12.MoveNext() in C:\\Kudu Files\\Private\\src\\master\\Kudu.Core\\Functions\\FunctionManager.cs:line 220\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at Kudu.Services.Functions.FunctionController.<GetSecrets>d__12.MoveNext() in C:\\Kudu Files\\Private\\src\\master\\Kudu.Services\\Functions\\FunctionController.cs:line 141"
  }
}

Answer 4

Quick tip : if you can get azure context with Get-AzContext, you can get the access token to the header like this : (Get-AzContext).TokenCache[0].ReadItems().AccessToken