Output FunctionUrl from AWS::Serverless::Function with URL

Question

I defined a AWS::Serverless::Function like follows:
```
  GreetingsFunction:
    Type: AWS::Serverless::Function
    Properties:
      Handler: index.handler
      Runtime: nodejs16.x
      Architectures:
        - x86_64
      InlineCode: !Sub |
        exports.handler = async () => {
          return {
              'statusCode': 200,
              'body': JSON.stringify({message: "Greetings from ${AWS::Region}"})
              };
          };
      FunctionUrlConfig:
        AuthType: NONE
        Cors:
          AllowOrigins:
            - "*"
```
I want to include FunctionUrl in the Outputs of my template. I tried `!GetAtt GreetingsFunction.FunctionUrl` hoping that the corresponding AWS::Lambda::Url attribute would propagate to AWS::Serverless::Function but this was not the case.

How do I retrieve the function URL?

Rowan Udell · Accepted Answer

To get this output, you need to know that SAM automatically creates a `AWS::Lambda::Ur` resource for you under the hood, which is just the function's resource ID with "...Url" appended to it.

You can get the value you want with this `Outputs` snippet:

```
Outputs:
  GreetingsFunction:
    Description: "Function URL for GreetingsFunction"
    Value:
      Fn::GetAtt: GreetingsFunctionUrl.FunctionUrl
```

Output FunctionUrl from AWS::Serverless::Function with URL

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