feat: support CosmosDB SDK-type bindings

azurefunctions-extensions-bindings-cosmos/LICENSE

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+Copyright (c) Microsoft Corporation.
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

azurefunctions-extensions-bindings-cosmos/MANIFEST.in

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+recursive-include azure *.py *.pyi
+recursive-include tests *.py
+include LICENSE README.md

azurefunctions-extensions-bindings-cosmos/README.md

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+# Azure Functions Extensions Bindings Cosmos library for Python
+This library allows Cosmos Input bindings in Python Function Apps to recognize and bind to client types from the
+Azure Cosmos sdk.
+
+Cosmos client types can be generated from:
+
+* Cosmos Input
+
+[Source code](https://github.com/Azure/azure-functions-python-extensions/tree/main/azurefunctions-extensions-bindings-cosmos)
+[Package (PyPi)](https://pypi.org/project/azurefunctions-extensions-bindings-cosmos/)
+| API reference documentation
+| Product documentation
+| [Samples](hhttps://github.com/Azure/azure-functions-python-extensions/tree/main/azurefunctions-extensions-bindings-cosmos/samples)
+
+
+## Getting started
+
+### Prerequisites
+* Python 3.9 or later is required to use this package. For more details, please read our page on [Python Functions version support policy](https://learn.microsoft.com/en-us/azure/azure-functions/functions-versions?tabs=isolated-process%2Cv4&pivots=programming-language-python#languages).
+
+* You must have an [Azure subscription](https://azure.microsoft.com/free/) and an
+[Azure storage account](https://docs.microsoft.com/azure/storage/common/storage-account-overview) to use this package.
+
+### Install the package
+Install the Azure Functions Extensions Bindings Cosmos library for Python with pip:
+
+```bash
+pip install azurefunctions-extensions-bindings-cosmos
+```
+
+### Create a storage account
+If you wish to create a new storage account, you can use the
+[Azure Portal](https://docs.microsoft.com/azure/storage/common/storage-quickstart-create-account?tabs=azure-portal),
+[Azure PowerShell](https://docs.microsoft.com/azure/storage/common/storage-quickstart-create-account?tabs=azure-powershell),
+or [Azure CLI](https://docs.microsoft.com/azure/storage/common/storage-quickstart-create-account?tabs=azure-cli):
+
+```bash
+# Create a new resource group to hold the storage account -
+# if using an existing resource group, skip this step
+az group create --name my-resource-group --location westus2
+
+# Create the storage account
+az storage account create -n my-storage-account-name -g my-resource-group
+```
+
+### Bind to the SDK-type
+The Azure Functions Extensions Bindings Cosmos library for Python allows you to create a function app with
+Cosmos Input and define the type as a CosmosClient, DatabaseProxy, or ContainerProxy. Instead of receiving
+an InputStream, when the function is executed, the type returned will be the defined SDK-type and have all of the
+properties and methods available as seen in the Azure Storage Cosmos library for Python.
+
+
+```python
+import logging
+import azure.functions as func
+import azurefunctions.extensions.bindings.cosmos as cosmos
+
+app = func.FunctionApp(http_auth_level=func.AuthLevel.ANONYMOUS)
+
+@app.route(route="cosmos")
+@app.cosmos_db_input(arg_name="container",
+                     connection="AzureWebJobsStorage",
+                     database_name="db_name",
+                     container_name="container_name")
+def get_docs(req: func.HttpRequest, client: cosmos.CosmosClient):
+    databases = client.list_databases()
+    for db in databases:
+        logging.info(f"Found database with ID: {db.get('id')}")
+
+    return "ok"
+```
+
+## Troubleshooting
+### General
+The SDK-types raise exceptions defined in [Azure Core](https://github.com/Azure/azure-sdk-for-python/blob/main/sdk/core/azure-core/README.md).
+
+This list can be used for reference to catch thrown exceptions. To get the specific error code of the exception, use the `error_code` attribute, i.e, `exception.error_code`.
+
+## Next steps
+
+### More sample code
+
+Get started with our [Cosmos samples](hhttps://github.com/Azure/azure-functions-python-extensions/tree/main/azurefunctions-extensions-bindings-cosmos/samples).
+
+Several samples are available in this GitHub repository. These samples provide example code for additional scenarios commonly encountered while working with Cosmos:
+
+* [cosmos_samples_cosmosclient](https://github.com/Azure/azure-functions-python-extensions/tree/main/azurefunctions-extensions-binding-cosmos/samples/cosmos_samples_cosmosclient)  - Examples for using the CosmosClient type:
+    * From CosmosInput
+
+* [cosmos_samples_databaseproxy](https://github.com/Azure/azure-functions-python-extensions/tree/main/azurefunctions-extensions-bindings-cosmos/samples/cosmos_samples_databaseproxy) - Examples for using the DatabaseProxy type:
+    * From CosmosInput
+
+* [cosmos_samples_containerclient](https://github.com/Azure/azure-functions-python-extensions/tree/main/azurefunctions-extensions-bindings-cosmos/samples/cosmos_samples_containerproxy) - Examples for using the ContainerProxy type:
+    * From CosmosInput
+
+### Additional documentation
+For more information on the Azure Cosmos SDK, see the [Azure Cosmos DB documentation](https://learn.microsoft.com/en-us/azure/cosmos-db/) on learn.microsoft.com
+and the [Azure Cosmos DB README](https://github.com/Azure/azure-sdk-for-python/tree/main/sdk/cosmos/azure-cosmos).
+
+## Contributing
+This project welcomes contributions and suggestions.  Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit https://cla.microsoft.com.
+
+When you submit a pull request, a CLA-bot will automatically determine whether you need to provide a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.
+
+This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/). For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact [[email protected]](mailto:[email protected]) with any additional questions or comments.

azurefunctions-extensions-bindings-cosmos/azurefunctions/__init__.py

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+__path__ = __import__("pkgutil").extend_path(__path__, __name__)

azurefunctions-extensions-bindings-cosmos/azurefunctions/extensions/__init__.py

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+__path__ = __import__("pkgutil").extend_path(__path__, __name__)

azurefunctions-extensions-bindings-cosmos/azurefunctions/extensions/bindings/__init__.py

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+__path__ = __import__("pkgutil").extend_path(__path__, __name__)

azurefunctions-extensions-bindings-cosmos/azurefunctions/extensions/bindings/cosmos/__init__.py

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+#  Copyright (c) Microsoft Corporation. All rights reserved.
+#  Licensed under the MIT License.
+
+from .cosmosClient import CosmosClient
+from .databaseProxy import DatabaseProxy
+from .containerProxy import ContainerProxy
+from .cosmosClientConverter import CosmosClientConverter
+
+__all__ = [
+    "CosmosClient",
+    "DatabaseProxy",
+    "ContainerProxy",
+    "CosmosClientConverter"
+]
+
+__version__ = "1.0.0b1"

azurefunctions-extensions-bindings-cosmos/azurefunctions/extensions/bindings/cosmos/containerProxy.py

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+#  Copyright (c) Microsoft Corporation. All rights reserved.
+#  Licensed under the MIT License.
+
+import json
+
+from azure.identity import DefaultAzureCredential
+from azure.cosmos import CosmosClient as CosmosClientSdk, ContainerProxy as ContainerProxySdk
+from azurefunctions.extensions.base import Datum, SdkType
+from .utils import get_connection_string, using_managed_identity
+
+
+class ContainerProxy(SdkType):
+    def __init__(self, *, data: Datum) -> None:
+        # model_binding_data properties
+        self._data = data
+        self._version = None
+        self._source = None
+        self._content_type = None
+        self._database_name = None
+        self._container_name = None
+        self._connection = None
+        self._using_managed_identity = False
+        self._partition_key = None
+        self._sql_query = None
+        self._preferred_locations = None
+        if self._data:
+            self._version = data.version
+            self._source = data.source
+            self._content_type = data.content_type
+            content_json = json.loads(data.content)
+            self._database_name = content_json.get("DatabaseName")
+            self._container_name = content_json.get("ContainerName")
+            self._connection = get_connection_string(content_json.get("Connection"))
+            self._using_managed_identity = using_managed_identity(
+                content_json.get("Connection")
+            )
+            self._preferred_locations = content_json.get("PreferredLocations")
+
+    def get_sdk_type(self) -> ContainerProxySdk:
+        """
+        When using Managed Identity, the only way to create a BlobClient is
+        through a BlobServiceClient. There are two ways to create a
+        BlobServiceClient:
+        1. Through the constructor: this is the only option when using Managed Identity
+        2. Through from_connection_string: this is the only option when not using Managed Identity
+
+        We track if Managed Identity is being used through a flag.
+        """
+        if self._data:
+            cosmos_client = (
+                CosmosClientSdk(
+                    url=self._connection, credential=DefaultAzureCredential()
+                )
+                if self._using_managed_identity
+                else CosmosClientSdk.from_connection_string(self._connection)
+            )
+            db_client = cosmos_client.get_database_client(self._database_name)
+            return db_client.get_container_client(self._container_name)
+        else:
+            return None

azurefunctions-extensions-bindings-cosmos/azurefunctions/extensions/bindings/cosmos/cosmosClient.py

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+#  Copyright (c) Microsoft Corporation. All rights reserved.
+#  Licensed under the MIT License.
+
+import json
+
+from azure.identity import DefaultAzureCredential
+from azure.cosmos import CosmosClient as CosmosClientSdk
+from azurefunctions.extensions.base import Datum, SdkType
+from .utils import get_connection_string, using_managed_identity
+
+
+class CosmosClient(SdkType):
+    def __init__(self, *, data: Datum) -> None:
+        # model_binding_data properties
+        self._data = data
+        self._version = None
+        self._source = None
+        self._content_type = None
+        self._database_name = None
+        self._container_name = None
+        self._connection = None
+        self._using_managed_identity = False
+        self._id = None
+        self._partition_key = None
+        self._sql_query = None
+        self._preferred_locations = None
+        if self._data:
+            self._version = data.version
+            self._source = data.source
+            self._content_type = data.content_type
+            content_json = json.loads(data.content)
+            self._database_name = content_json.get("DatabaseName")
+            self._container_name = content_json.get("ContainerName")
+            self._connection = get_connection_string(content_json.get("Connection"))
+            self._using_managed_identity = using_managed_identity(
+                content_json.get("Connection")
+            )
+            self._preferred_locations = content_json.get("PreferredLocations")
+
+    def get_sdk_type(self) -> CosmosClientSdk:
+        """
+        When using Managed Identity, the only way to create a BlobClient is
+        through a BlobServiceClient. There are two ways to create a
+        BlobServiceClient:
+        1. Through the constructor: this is the only option when using Managed Identity
+        2. Through from_connection_string: this is the only option when not using Managed Identity
+
+        We track if Managed Identity is being used through a flag.
+        """
+        if self._data:
+            cosmos_client = (
+                CosmosClientSdk(
+                    url=self._connection, credential=DefaultAzureCredential()
+                )
+                if self._using_managed_identity
+                else CosmosClientSdk.from_connection_string(self._connection)
+            )
+            return cosmos_client
+        else:
+            return None

azurefunctions-extensions-bindings-cosmos/azurefunctions/extensions/bindings/cosmos/cosmosClientConverter.py

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+#  Copyright (c) Microsoft Corporation. All rights reserved.
+#  Licensed under the MIT License.
+
+from typing import Any
+
+from azurefunctions.extensions.base import Datum, InConverter, OutConverter
+
+from .cosmosClient import CosmosClient
+from .databaseProxy import DatabaseProxy
+from .containerProxy import ContainerProxy
+
+
+class CosmosClientConverter(
+    InConverter,
+    OutConverter,
+    binding="cosmosDB"
+):
+    @classmethod
+    def check_input_type_annotation(cls, pytype: type) -> bool:
+        return issubclass(
+            pytype, (CosmosClient, DatabaseProxy, ContainerProxy)
+        )
+
+    @classmethod
+    def decode(cls, data: Datum, *, trigger_metadata, pytype) -> Any:
+        if data is None or data.type is None:
+            return None
+
+        data_type = data.type
+
+        if data_type == "model_binding_data":
+            data = data.value
+        else:
+            raise ValueError(
+                f'unexpected type of data received for the "Cosmos" binding '
+                f": {data_type!r}"
+            )
+
+        # Determines which sdk type to return based on pytype
+        if pytype == CosmosClient:
+            return CosmosClient(data=data).get_sdk_type()
+        elif pytype == DatabaseProxy:
+            return DatabaseProxy(data=data).get_sdk_type()
+        elif pytype == ContainerProxy:
+            return ContainerProxy(data=data).get_sdk_type()
+        else:
+            return None

azurefunctions-extensions-bindings-cosmos/azurefunctions/extensions/bindings/cosmos/databaseProxy.py

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+#  Copyright (c) Microsoft Corporation. All rights reserved.
+#  Licensed under the MIT License.
+
+import json
+
+from azure.identity import DefaultAzureCredential
+from azure.cosmos import CosmosClient as CosmosClientSdk, DatabaseProxy as DatabaseProxySdk
+from azurefunctions.extensions.base import Datum, SdkType
+from .utils import get_connection_string, using_managed_identity
+
+
+class DatabaseProxy(SdkType):
+    def __init__(self, *, data: Datum) -> None:
+        # model_binding_data properties
+        self._data = data
+        self._version = None
+        self._source = None
+        self._content_type = None
+        self._database_name = None
+        self._container_name = None
+        self._connection = None
+        self._using_managed_identity = False
+        self._partition_key = None
+        self._sql_query = None
+        self._preferred_locations = None
+        if self._data:
+            self._version = data.version
+            self._source = data.source
+            self._content_type = data.content_type
+            content_json = json.loads(data.content)
+            self._database_name = content_json.get("DatabaseName")
+            self._container_name = content_json.get("ContainerName")
+            self._connection = get_connection_string(content_json.get("Connection"))
+            self._using_managed_identity = using_managed_identity(
+                content_json.get("Connection")
+            )
+            self._preferred_locations = content_json.get("PreferredLocations")
+
+    def get_sdk_type(self) -> DatabaseProxySdk:
+        """
+        When using Managed Identity, the only way to create a BlobClient is
+        through a BlobServiceClient. There are two ways to create a
+        BlobServiceClient:
+        1. Through the constructor: this is the only option when using Managed Identity
+        2. Through from_connection_string: this is the only option when not using Managed Identity
+
+        We track if Managed Identity is being used through a flag.
+        """
+        if self._data:
+            cosmos_client = (
+                CosmosClientSdk(
+                    url=self._connection, credential=DefaultAzureCredential()
+                )
+                if self._using_managed_identity
+                else CosmosClientSdk.from_connection_string(self._connection)
+            )
+            return cosmos_client.get_database_client(self._database_name)
+        else:
+            return None