feat: Add sample codes for cloud-iot-token-service generateAccessToken API

Author: codepriestz

samples/api-client/accesstoken_example/README.rst

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+.. This file is automatically generated. Do not edit this file directly.
+
+Google Cloud IoT Token Api Python Samples
+===============================================================================
+
+.. image:: https://gstatic.com/cloudssh/images/open-btn.png
+ :target: https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/GoogleCloudPlatform/python-docs-samples&page=editor&open_in_editor=iot/api-client/accesstoken_example/README.rst
+
+
+This directory contains samples for Google Cloud IoT Token Api. # Google Cloud IoT Core Python Device Federated Authentication example This sample app demonstrates the capabilites of Google Cloud IoT Core device federated authentication feature. Devices authenticated to Cloud IoT Core can use the [Token Service](https://cloud.google.com/iot/alpha/docs/reference/cloudiottoken/rest) federated authentication to request [OAuth 2.0 access tokens](https://developers.google.com/identity/protocols/oauth2) in exchange for their [Cloud IoT Core JWTs](https://cloud.google.com/iot/docs/how-tos/credentials/jwts). The OAuth 2.0 credentials can be used to call different [Google Cloud APIs](https://developers.google.com/identity/protocols/oauth2/scopes) with fine-grained permissions and access control using [Workload Identity Federation](https://cloud.google.com/iam/docs/workload-identity-federation). For more information, see https://cloud.google.com/iot/alpha/docs/how-tos/federated_auth
+
+
+
+
+.. _Google Cloud IoT Token Api: https://cloud.google.com/iot/docs
+
+
+
+
+
+Setup
+-------------------------------------------------------------------------------
+
+
+Authentication
+++++++++++++++
+
+This sample requires you to have authentication setup. Refer to the
+`Authentication Getting Started Guide`_ for instructions on setting up
+credentials for applications.
+
+.. _Authentication Getting Started Guide:
+ https://cloud.google.com/docs/authentication/getting-started
+
+Install Dependencies
+++++++++++++++++++++
+
+#. Clone python-docs-samples and change directory to the sample directory you want to use.
+
+ .. code-block:: bash
+
+ $ git clone https://github.com/GoogleCloudPlatform/python-docs-samples.git
+
+#. Install `pip`_ and `virtualenv`_ if you do not already have them. You may want to refer to the `Python Development Environment Setup Guide`_ for Google Cloud Platform for instructions.
+
+ .. _Python Development Environment Setup Guide:
+ https://cloud.google.com/python/setup
+
+#. Create a virtualenv. Samples are compatible with Python 3.6+.
+
+ .. code-block:: bash
+
+ $ virtualenv env
+ $ source env/bin/activate
+
+#. Install the dependencies needed to run the samples.
+
+ .. code-block:: bash
+
+ $ pip install -r requirements.txt
+
+.. _pip: https://pip.pypa.io/
+.. _virtualenv: https://virtualenv.pypa.io/
+
+Samples
+-------------------------------------------------------------------------------
+
+accesstoken
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+.. image:: https://gstatic.com/cloudssh/images/open-btn.png
+ :target: https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/GoogleCloudPlatform/python-docs-samples&page=editor&open_in_editor=iot/api-client/accesstoken_example/accesstoken.py,iot/api-client/accesstoken_example/README.rst
+
+
+
+
+To run this sample:
+
+.. code-block:: bash
+
+ $ python accesstoken.py
+
+ usage: accesstoken.py [-h] [--algorithm {RS256,ES256}]
+ [--private_key_file PRIVATE_KEY_FILE]
+ [--cloud_region CLOUD_REGION] [--device_id DEVICE_ID]
+ [--scope SCOPE] [--project_id PROJECT_ID]
+ [--registry_id REGISTRY_ID] [--topic_id TOPIC_ID]
+ [--bucket_name BUCKET_NAME] [--data_path DATA_PATH]
+ [--service_account_email SERVICE_ACCOUNT_EMAIL]
+ [--device_access_token DEVICE_ACCESS_TOKEN]
+ [--command_to_be_sent_to_device COMMAND_TO_BE_SENT_TO_DEVICE]
+ {generate-access-token,publish-pubsub-message,send-command-to-iot-device,download-cloud-storage-file,exchange-device-token-for-service-account-token}
+ ...
+
+ This sample app demonstrates the capabilites of Google Cloud IoT Core device federated authentication feature.
+ Devices authenticated to Cloud IoT Core can use the [Token Service](https://cloud.google.com/iot/alpha/docs/reference/cloudiottoken/rest) federated authentication to request [OAuth 2.0 access tokens](https://developers.google.com/identity/protocols/oauth2) in exchange for their [Cloud IoT Core JWTs](https://cloud.google.com/iot/docs/how-tos/credentials/jwts).
+ The OAuth 2.0 credentials can be used to call different [Google Cloud APIs](https://developers.google.com/identity/protocols/oauth2/scopes) with fine-grained permissions and access control using [Workload Identity Federation](https://cloud.google.com/iam/docs/workload-identity-federation).
+ For more information, see https://cloud.google.com/iot/alpha/docs/how-tos/federated_auth
+
+ Usage example:
+
+ python accesstoken.py \
+ --project_id=my-project-id \
+ --cloud_region=us-central1 \
+ --registry_id=my-registry-id \
+ --device_id=my-device-id \
+ --private_key_file=./resources/rsa_private.pem \
+ --scope=https://www.googleapis.com/auth/cloud-platform \
+ --algorithm=RS256 \
+ generate-access-token
+
+ positional arguments:
+ {generate-access-token,publish-pubsub-message,send-command-to-iot-device,download-cloud-storage-file,exchange-device-token-for-service-account-token}
+ generate-access-token
+ Generates OAuth 2.0 Google Access Token.
+ publish-pubsub-message
+ Publishes a message to Cloud Pub/Sub topic.
+ send-command-to-iot-device
+ Sends a command to an IoT device.
+ download-cloud-storage-file
+ Downloads a file from Cloud Storage bucket.
+ exchange-device-token-for-service-account-token
+ Exchanges device access token to service account
+ access token.
+
+ optional arguments:
+ -h, --help show this help message and exit
+ --algorithm {RS256,ES256}
+ Encryption algorithm used to generate the device JWT.
+ --private_key_file PRIVATE_KEY_FILE
+ Path to private key file.
+ --cloud_region CLOUD_REGION
+ GCP cloud region.
+ --device_id DEVICE_ID
+ Device ID.
+ --scope SCOPE Scope for OAuth 2.0 access token. Space delimited
+ strings. See the full list of scopes at: https://devel
+ opers.google.com/identity/protocols/oauth2/scopes
+ --project_id PROJECT_ID
+ GCP cloud project name.
+ --registry_id REGISTRY_ID
+ Registry ID.
+ --topic_id TOPIC_ID Cloud Pub/Sub topic ID.
+ --bucket_name BUCKET_NAME
+ Cloud Storage bucket name.
+ --data_path DATA_PATH
+ Path to file to be uploaded.
+ --service_account_email SERVICE_ACCOUNT_EMAIL
+ Service account email to exchange device access token
+ to service account token.
+ --device_access_token DEVICE_ACCESS_TOKEN
+ Device access token to exchange for service account
+ access token.
+ --command_to_be_sent_to_device COMMAND_TO_BE_SENT_TO_DEVICE
+ Command to be sent to the IoT device.
+
+
+
+
+
+.. _Google Cloud SDK: https://cloud.google.com/sdk/

samples/api-client/accesstoken_example/README.rst.in

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+# This file is used to generate README.rst
+
+product:
+ name: Google Cloud IoT Token Api
+ short_name: Cloud IoT Token Api
+ url: https://cloud.google.com/iot/docs
+ description: >
+ # Google Cloud IoT Core Python Device Federated Authentication example
+ This sample app demonstrates the capabilites of Google Cloud IoT Core device federated authentication feature.
+ Devices authenticated to Cloud IoT Core can use the [Token Service](https://cloud.google.com/iot/alpha/docs/reference/cloudiottoken/rest) federated authentication to request [OAuth 2.0 access tokens](https://developers.google.com/identity/protocols/oauth2) in exchange for their [Cloud IoT Core JWTs](https://cloud.google.com/iot/docs/how-tos/credentials/jwts).
+ The OAuth 2.0 credentials can be used to call different [Google Cloud APIs](https://developers.google.com/identity/protocols/oauth2/scopes) with fine-grained permissions and access control using [Workload Identity Federation](https://cloud.google.com/iam/docs/workload-identity-federation).
+ For more information, see https://cloud.google.com/iot/alpha/docs/how-tos/federated_auth
+
+setup:
+- auth
+- install_deps
+
+samples:
+- name: accesstoken
+ file: accesstoken.py
+ show_help: True
+
+cloud_client_library: false
+
+folder: iot/api-client/accesstoken_example