Support setting proxy from environment variables for request session

CHANGELOG.md

@@ -16,6 +16,9 @@
 
 ### Added
 
+- Support setting proxy from environment variables for request session
+  ([#501](https://github.com/nsidc/earthaccess/issues/501))
+  ([**@Isotr0py**](https://github.com/Isotr0py))
 - Added Issue Templates
   ([#281](https://github.com/nsidc/earthaccess/issues/281))
   ([**@Sherwin-14**](https://github.com/Sherwin-14))

earthaccess/auth.py

@@ -4,6 +4,7 @@
 import os
 import platform
 import shutil
+from functools import lru_cache
 from netrc import NetrcParseError
 from pathlib import Path
 from typing import Any, Dict, List, Mapping, Optional
@@ -197,6 +198,7 @@ def get_s3_credentials(
             logger.info("We need to authenticate with EDL first")
             return {}
 
+    @lru_cache
     def get_session(self, bearer_token: bool = True) -> requests.Session:
         """Returns a new request session instance.
 
@@ -207,6 +209,13 @@ def get_session(self, bearer_token: bool = True) -> requests.Session:
             class Session instance with Auth and bearer token headers
         """
         session = SessionWithHeaderRedirection()
+
+        proxy = {
+            "http": os.getenv("HTTP_PROXY", ""),
+            "https": os.getenv("HTTPS_PROXY", ""),
+        }
+        session.proxies.update({k: v for k, v in proxy.items() if v})
+
         if bearer_token and self.token:
             # This will avoid the use of the netrc after we are logged in
             session.trust_env = False