Callback App

6 minutes to complete

The component ArhiveFunctionApp can deploy functions created in any language, which is supported by Azure Functions. For instance, you could develop a function in C# and check the runtime application setting to dotnet.

However, if you choose to stick to Node.js as the runtime, there’s another simple way to create a function.

Inline functions

It is possible to define the implementation of Azure Functions inside the Pulumi program. Add the following code to your index.ts file in the root folder of the project:

const callbackApp = new azure.appservice.HttpEventSubscription("callbackfn", {
    resourceGroup,
    callback: async (context, request) => {
        return {
            status: 200,
            body: "Greetings from Azure Functions in a callback!",
            headers: {
                "content-type": "text/html",
            },
        };
    },
});

export let callbackEndpoint = callbackApp.url;

At deployment time, Pulumi serializes the callback into a standalone JavaScript file, generates bindings and settings, packages them all up as a zip, and deploys the rest of infrastructure.

Run pulumi up to deploy this third Function App. The list of created resources will match the list produced by ArhiveFunctionApp.

The deployment will also print a new output:

Outputs:
  + callbackEndpoint: "https://callbackfn8c0bd67c.azurewebsites.net/api/callbackfn"

Checkpoint

Send an HTTP request to the new application endpoint and make sure it returns a greeting from the callback.

If you have any difficulties, compare your code with this sample.

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