def create_application_certificate_connection_string()

in quick_start/utils.py [0:0]

• 26 lines of code
• 6 McCabe index (conditional complexity)

        def create_application_certificate_connection_string(cls, cluster_url: str) -> KustoConnectionStringBuilder:
            """
            Generates Kusto Connection String based on 'AppCertificate' Authentication Mode.
            :param cluster_url: Url of cluster to connect to
            :return: AppCertificate Kusto Connection String
            """

            # TODO (config - optional): App ID & tenant, path to public certificate and path to private certificate pem file to authenticate with
            app_id = os.environ.get("APP_ID")
            app_tenant = os.environ.get("APP_TENANT")
            private_key_pem_file_path = os.environ.get("PRIVATE_KEY_PEM_FILE_PATH")
            cert_thumbprint = os.environ.get("CERT_THUMBPRINT")
            public_cert_file_path = os.environ.get("PUBLIC_CERT_FILE_PATH")  # Only used for "Subject Name and Issuer" auth
            public_certificate = None
            pem_certificate = None

            try:
                with open(private_key_pem_file_path, "r") as pem_file:
                    pem_certificate = pem_file.read()
            except Exception as ex:
                Utils.error_handler(f"Failed to load PEM file from {private_key_pem_file_path}", ex)

            if public_cert_file_path:
                try:
                    with open(public_cert_file_path, "r") as cert_file:
                        public_certificate = cert_file.read()
                except Exception as ex:
                    Utils.error_handler(f"Failed to load public certificate file from {public_cert_file_path}", ex)

                return KustoConnectionStringBuilder.with_aad_application_certificate_sni_authentication(
                    cluster_url, app_id, pem_certificate, public_certificate, cert_thumbprint, app_tenant
                )
            else:
                return KustoConnectionStringBuilder.with_aad_application_certificate_authentication(
                    cluster_url, app_id, pem_certificate, cert_thumbprint, app_tenant
                )