Moves Gateway demo to MQTT folder (#1983)

* Copies gateway demo to MQTT folder

Author: gguuss

iot/api-client/mqtt_example/gateway_demo.py

@@ -0,0 +1,167 @@
+# Copyright 2019 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# [START iot_gateway_demo]
+import csv
+import datetime
+import logging
+import os
+import sys
+import time
+
+sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'manager'))  # noqa
+
+import cloudiot_mqtt_example
+import manager
+
+logging.getLogger('googleapiclient.discovery_cache').setLevel(logging.CRITICAL)
+
+cloud_region = 'us-central1'
+device_id_template = 'test-device-{}'
+gateway_id_template = 'test-gateway-{}'
+topic_id = 'test-device-events-{}'.format(int(time.time()))
+
+ca_cert_path = 'resources/roots.pem'
+log_path = 'config_log.csv'
+rsa_cert_path = 'resources/rsa_cert.pem'
+rsa_private_path = 'resources/rsa_private.pem'
+
+if ('GCLOUD_PROJECT' not in os.environ or
+        'GOOGLE_APPLICATION_CREDENTIALS' not in os.environ):
+    print(
+      'You must set GCLOUD_PROJECT and GOOGLE_APPLICATION_CREDENTIALS')
+    quit()
+
+project_id = os.environ['GCLOUD_PROJECT']
+service_account_json = os.environ['GOOGLE_APPLICATION_CREDENTIALS']
+
+pubsub_topic = 'projects/{}/topics/{}'.format(project_id, topic_id)
+registry_id = 'test-registry-{}'.format(int(time.time()))
+
+base_url = 'https://console.cloud.google.com/iot/locations/{}'.format(
+        cloud_region)
+edit_template = '{}/registries/{}?project={}'.format(
+        base_url, '{}', '{}')
+
+device_url_template = '{}/registries/{}/devices/{}?project={}'.format(
+        base_url, '{}', '{}', '{}')
+
+mqtt_bridge_hostname = 'mqtt.googleapis.com'
+mqtt_bridge_port = 8883
+
+num_messages = 15
+jwt_exp_time = 20
+listen_time = 30
+
+
+if __name__ == '__main__':
+    print("Running demo")
+
+    gateway_id = device_id_template.format('RS256')
+    device_id = device_id_template.format('noauthbind')
+
+    # [START iot_gateway_demo_create_registry]
+    print('Creating registry: {}'.format(registry_id))
+    manager.create_registry(
+            service_account_json, project_id, cloud_region, pubsub_topic,
+            registry_id)
+    # [END iot_gateway_demo_create_registry]
+
+    # [START iot_gateway_demo_create_gateway]
+    print('Creating gateway: {}'.format(gateway_id))
+    manager.create_gateway(
+            service_account_json, project_id, cloud_region, registry_id,
+            None, gateway_id, rsa_cert_path, 'RS256')
+    # [END iot_gateway_demo_create_gateway]
+
+    # [START iot_gateway_demo_create_bound_device]
+    print('Creating device to bind: {}'.format(device_id))
+    manager.create_device(
+            service_account_json, project_id, cloud_region, registry_id,
+            device_id)
+    # [END iot_gateway_demo_create_bound_device]
+
+    # [START iot_gateway_demo_bind_device]
+    print('Binding device')
+    manager.bind_device_to_gateway(
+            service_account_json, project_id, cloud_region, registry_id,
+            device_id, gateway_id)
+    # [END iot_gateway_demo_bind_device]
+
+    # [START iot_gateway_demo_listen]
+    print('Listening for messages for {} seconds'.format(listen_time))
+    print('Try setting configuration in: ')
+    print('\t{}'.format(edit_template.format(registry_id, project_id)))
+    try:
+        input("Press enter to continue")
+    except SyntaxError:
+        pass
+
+    def log_callback(client):
+        def log_on_message(unused_client, unused_userdata, message):
+            if not os.path.exists(log_path):
+                with open(log_path, 'w') as csvfile:
+                    logwriter = csv.writer(csvfile, dialect='excel')
+                    logwriter.writerow(['time', 'topic', 'data'])
+
+            with open(log_path, 'a') as csvfile:
+                logwriter = csv.writer(csvfile, dialect='excel')
+                logwriter.writerow([
+                        datetime.datetime.now().isoformat(),
+                        message.topic,
+                        message.payload])
+
+        client.on_message = log_on_message
+
+    cloudiot_mqtt_example.listen_for_messages(
+                service_account_json, project_id, cloud_region, registry_id,
+                device_id, gateway_id, num_messages, rsa_private_path, 'RS256',
+                ca_cert_path, mqtt_bridge_hostname, mqtt_bridge_port,
+                jwt_exp_time, listen_time, log_callback)
+    # [END iot_gateway_demo_listen]
+
+    # [START iot_gateway_demo_publish]
+    print('Publishing messages demo')
+    print('Publishing: {} messages'.format(num_messages))
+    cloudiot_mqtt_example.send_data_from_bound_device(
+                service_account_json, project_id, cloud_region, registry_id,
+                device_id, gateway_id, num_messages, rsa_private_path, 'RS256',
+                ca_cert_path, mqtt_bridge_hostname, mqtt_bridge_port,
+                jwt_exp_time, "Hello from gateway_demo.py")
+
+    print('You can read the state messages for your device at this URL:')
+    print('\t{}'.format(device_url_template).format(
+            registry_id, device_id, project_id))
+    try:
+        input('Press enter to continue after reading the messages.')
+    except SyntaxError:
+        pass
+    # [END iot_gateway_demo_publish]
+
+    # [START iot_gateway_demo_cleanup]
+    # Clean up
+    manager.unbind_device_from_gateway(
+            service_account_json, project_id, cloud_region, registry_id,
+            device_id, gateway_id)
+    manager.delete_device(
+            service_account_json, project_id, cloud_region, registry_id,
+            device_id)
+    manager.delete_device(
+            service_account_json, project_id, cloud_region, registry_id,
+            gateway_id)
+    manager.delete_registry(
+            service_account_json, project_id, cloud_region, registry_id)
+    # [END iot_gateway_demo_cleanup]
+
+# [END iot_gateway_demo]