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86 lines
4.1 KiB
Markdown
86 lines
4.1 KiB
Markdown
# Webhooks Endpoint Example
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This example endpoint takes any incoming [OneFuzz webhook](../../docs/webhooks.md) and submits it to Microsoft Teams.
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Check out [Webhook Events Details](../../docs/webhook_events.md) for the schema of all supported events.
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## Creating an Azure Function
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1. Edit `local.settings.json` and add the following to the `Values` dictionary:
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* Create a [Microsoft Teams incoming webhook URL](https://docs.microsoft.com/en-us/microsoftteams/platform/webhooks-and-connectors/how-to/connectors-using#setting-up-a-custom-incoming-webhook), and set this the value for `TEAMS_URL`.
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* Create a random string that you generate, and set this value for `HMAC_TOKEN`. This will be used to [help secure your webhook](https://github.com/microsoft/onefuzz/blob/main/docs/webhooks.md#securing-your-webhook)
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2. [Create Azure Resources for an Azure Function](https://docs.microsoft.com/en-us/azure/azure-functions/create-first-function-cli-python?tabs=azure-cli%2Cbash%2Cbrowser#5-create-supporting-azure-resources-for-your-function).
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3. Ensure your function is HTTPS only:
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```bash
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az functionapp update --resource-group <RESOURCE_GROUP> --name <FUNCTION_APP_NAME> --set httpsOnly=true
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```
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4. Deploy your function
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```bash
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func azure functionapp publish <FUNCTION_APP_NAME> --publish-local-settings
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```
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5. From the previous command, write down the URL for your webhook. It should look something like this:
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```
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webhook - [httpTrigger]
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Invoke url: https://<FUNCTION_APP_NAME>.azurewebsites.net/api/webhook?code=<BASE64_ENCODED_STRING>
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```
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6. Register this new URL webhook to OneFuzz. In this example, we're registering a webhook to tell our service any time a job is created and stopped:
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```bash
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onefuzz webhooks create my-webhook "https://<FUNCTION_APP_NAME>.azurewebsites.net/api/webhook?code=<BASE64_ENCODED_STRING>" job_created job_stopped --secret_token <HMAC_TOKEN>
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```
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> NOTE: Make sure `HMAC_TOKEN` is the value we added to `local.settings.json` earlier.
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This will respond with something akin to:
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```json
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{
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"event_types": [
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"job_created",
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"job_stopped"
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],
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"name": "my-webhook",
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"webhook_id": "9db7a8bb-0680-42a9-b336-655d3654fd6c"
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}
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```
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7. Using the `webhook_id` we got in response, we can test our webhook using:
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```bash
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onefuzz webhooks ping 9db7a8bb-0680-42a9-b336-655d3654fd6c
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```
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8. Using `webhook_id` we got in response, we can test if OneFuzz was able to send our service webhooks:
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```
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onefuzz webhooks logs 9db7a8bb-0680-42a9-b336-655d3654fd6c
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```
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If our webhook is successful, we'll see something akin to:
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```json
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[
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{
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"event": {
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"ping_id": "0770679d-67a0-4a6e-a5d7-751c7f80ebab"
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},
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"event_id": "0c12ca77-bff8-4f8b-ae0d-f38f64cf0247",
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"event_type": "ping",
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"instance_id": "833bd437-775c-4b80-be62-599a9907f0f9",
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"instance_name": "YOUR-ONEFUZZ-INSTANCE-NAME",
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"state": "succeeded",
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"try_count": 1,
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"webhook_id": "9db7a8bb-0680-42a9-b336-655d3654fd6c"
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}
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]
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```
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OneFuzz will attempt to send each event up to 5 times before giving up. Instead of `succeeded` as above, you might see `retrying` if OneFuzz is still working to send the event, or `failed` if OneFuzz has given up sending the event.
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9. Check your Teams channel. If all is successful, we should see something like the following:
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## Troubleshooting
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* If your function isn't working as expected, check out the logs for your Azure Functions via:
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```
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func azure functionapp logstream <FUNCTION_APP_NAME> --browser
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```
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* If you see exceptions that say `missing HMAC_TOKEN` or `missing TEAMS_URL`, you forgot to add those settings above.
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* If you see exceptions saying `missing X-Onefuzz-Digest`, you forgot to set the `--secret_token` when you during `onefuzz webhooks create` above. This can be addressed via:
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```
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onefuzz webhooks update --secret_token <HMAC_TOKEN> <webhook_id>
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```
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