enhance GoogleCloudConnector to support proxy

pkg/pip_requirements.txt

@@ -2,4 +2,5 @@ google-auth
 google-api-python-client
 schematics
 spaceone-api>=1.0.0,<2.0.0
-spaceone-core>=1.0.0,<2.0.0
+spaceone-core>=1.0.0,<2.0.0
+PySocks # for proxy support

src/spaceone/monitoring/connector/google_cloud_connector/__init__.py

@@ -1,11 +1,19 @@
 import logging
+import os
+
 import google.oauth2.service_account
 import googleapiclient
 import googleapiclient.discovery
+import httplib2
+import socks
+from google_auth_httplib2 import AuthorizedHttp
+
 from spaceone.core.connector import BaseConnector
-from spaceone.monitoring.connector.google_cloud_connector.google_cloud_monitoring import GoogleCloudMonitoring
+from spaceone.monitoring.connector.google_cloud_connector.google_cloud_monitoring import (
+    GoogleCloudMonitoring,
+)
 
-__all__ = ['GoogleCloudConnector']
+__all__ = ["GoogleCloudConnector"]
 _LOGGER = logging.getLogger(__name__)
 
 
@@ -24,13 +32,43 @@ def set_connect(self, schema, options: dict, secret_data: dict):
             - ...
         """
         try:
-            self.project_id = secret_data.get('project_id')
-            credentials = google.oauth2.service_account.Credentials.from_service_account_info(secret_data)
-            self.client = googleapiclient.discovery.build('monitoring', 'v3', credentials=credentials)
+            google_client_service = "monitoring"
+            version = "v3"
 
+            self.project_id = secret_data.get("project_id")
+            credentials = (
+                google.oauth2.service_account.Credentials.from_service_account_info(
+                    secret_data
+                )
+            )
+            proxy_http = self._create_http_client()
+            if proxy_http:
+                _LOGGER.info(
+                    f"** Using proxy in environment variable HTTPS_PROXY/https_proxy: {proxy_http}"
+                )
+                self.client = googleapiclient.discovery.build(
+                    google_client_service,
+                    version,
+                    http=AuthorizedHttp(
+                        credentials.with_scopes(
+                            [
+                                "https://www.googleapis.com/auth/cloud-platform"
+                            ]  # FOR PROXY SCOPE SUPPORT
+                        ),
+                        http=proxy_http,
+                    ),
+                )
+            else:
+                self.client = googleapiclient.discovery.build(
+                    google_client_service,
+                    version,
+                    credentials=credentials,
+                )
         except Exception as e:
             print(e)
-            raise self.client(message='connection failed. Please check your authentication information.')
+            raise self.client(
+                message="connection failed. Please check your authentication information."
+            )
 
     def list_metrics(self, *args, **kwargs):
         monitoring = GoogleCloudMonitoring(self.client, self.project_id)
@@ -39,3 +77,33 @@ def list_metrics(self, *args, **kwargs):
     def get_metric_data(self, *args, **kwargs):
         monitoring = GoogleCloudMonitoring(self.client, self.project_id)
         return monitoring.get_metric_data(*args, **kwargs)
+
+    def _create_http_client(self):
+        https_proxy = os.environ.get("HTTPS_PROXY") or os.environ.get("https_proxy")
+
+        if https_proxy:
+            _LOGGER.info(
+                f"** Using proxy in environment variable HTTPS_PROXY/https_proxy: {https_proxy}"
+            )
+            try:
+                proxy_url = https_proxy.replace("http://", "").replace("https://", "")
+                if ":" in proxy_url:
+                    proxy_host, proxy_port = proxy_url.split(":", 1)
+                    proxy_port = int(proxy_port)
+
+                proxy_info = httplib2.ProxyInfo(
+                    proxy_host=proxy_host,
+                    proxy_port=proxy_port,
+                    proxy_type=socks.PROXY_TYPE_HTTP,
+                )
+
+                return httplib2.Http(
+                    proxy_info=proxy_info, disable_ssl_certificate_validation=True
+                )
+            except Exception as e:
+                _LOGGER.warning(
+                    f"Failed to configure proxy. Using direct connection.: {e}. "
+                )
+                return None
+        else:
+            return None