Pub/Sub: What is 'your-token' in the Pub/Sub GAE sample

[ahmetsan]

##2437

[your-app-id].appspot.com/_ah/push-handlers/receive_messages?token=[your-token]

your-app-id is my project id. but where can i find "your-token"

[busunkim96]

It looks like this is from App Engine Pub/Sub samples.

• https://github.com/GoogleCloudPlatform/python-docs-samples/blob/c96596aa86d63939b67f241770207ad09f672ba2/appengine/standard/pubsub/README.md
• https://github.com/GoogleCloudPlatform/python-docs-samples/blob/c96596aa86d63939b67f241770207ad09f672ba2/appengine/standard_python37/pubsub/README.md

@anguillanneuf could you clarify?

[radianceltd]

I ran into the following problems when adding a gateway on the client side

cryptography==2.7
flaky==3.6.1
gcp-devrel-py-tools==0.0.15
google-api-python-client==1.7.11
google-auth-httplib2==0.0.3
google-auth==1.6.3
google-cloud-iot==0.3.0
google-cloud-pubsub==1.0.0
oauth2client==4.1.3
paho-mqtt==1.4.0
pyjwt==1.7.1

@classmethod
    def create_gateway(cls, service_account_json, project_id, cloud_region, registry_id, device_id,
            gateway_id, certificate_file, algorithm):
        """Create a gateway to bind devices to."""
        # [START iot_create_gateway]
        # Check that the gateway doesn't already exist

        exists = False

        os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = current_app.config['GOOGLE_APPLICATION_CREDENTIALS']

        # credentials = service_account.Credentials.from_service_account_file(
        # "your-json-file - path -with-filename.json")

        client = iot_v1.DeviceManagerClient()

        parent = client.registry_path(project_id, cloud_region, registry_id)
        devices = list(client.list_devices(parent=parent))

        for device in devices:
            if device.id == gateway_id:
                exists = True
            print('Device: {} : {} : {} : {}'.format(
                device.id,
                device.num_id,
                device.config,
                device.gateway_config
            ))

        with io.open(certificate_file) as f:
            certificate = f.read()

        if algorithm == 'ES256':
            certificate_format = 'ES256_PEM'
        else:
            certificate_format = 'RSA_X509_PEM'

        # TODO: Auth type
        device_template = {
            'id': gateway_id,
            'credentials': [{
                'public_key': {
                    'format': certificate_format,
                    'key': certificate
                }
            }],
            'gateway_config': {
                'gateway_type': 'GATEWAY',
                'gateway_auth_method': 'ASSOCIATION_ONLY'
            }
        }

        if not exists:
            res = client.create_device(parent, device_template)
            print('Created Gateway {}'.format(res))
            return True
        else:
            print('Gateway exists, skipping')
            return False
        # [END iot_create_gateway]

grpc._channel._Rendezvous: <_Rendezvous of RPC that terminated with:
	status = StatusCode.UNAVAILABLE
	details = "failed to connect to all addresses"
	debug_error_string = "{"created":"@1576569855.416981000","description":"Failed to pick subchannel","file":"src/core/ext/filters/client_channel/client_channel.cc","file_line":3934,"referenced_errors":[{"created":"@1576569855.416980000","description":"failed to connect to all addresses","file":"src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc","file_line":393,"grpc_status":14}]}"
>

[busunkim96]

@radianceltd It looks like you're running into a different problem. Would you mind opening a new issue with the contents of your last post? It'll make it easier for us to track both issues. Thank you!

[anguillanneuf]

Hi @ahmetsan, thanks for your question!

[your-app-id].appspot.com/_ah/push-handlers/receive_messages?token=[your-token] is the push endpoint when you set up your push subscription. [your-token] is an alphanumeric string that you can specify. If you for instance choose 1234abc, you can save it in app.yaml:

python-docs-samples/appengine/standard_python37/pubsub/app.yaml

Lines 6 to 8 in 23d8571

	# This token is used to verify that requests originate from your
	# application. It can be any sufficiently random string.
	PUBSUB_VERIFICATION_TOKEN: 1234abc

And use it like this:

python-docs-samples/appengine/standard_python37/pubsub/main.py

Lines 66 to 68 in 23d8571

	if (request.args.get('token', '') !=
	current_app.config['PUBSUB_VERIFICATION_TOKEN']):
	return 'Invalid request', 400