python-sdk: Add support for proxy environment variables like HTTPS_PROXY

This adds support for the following proxy environment variables:

- https_proxy
- HTTPS_PROXY
- http_proxy
- HTTP_PROXY
- all_proxy
- ALL_PROXY

Lowercase version takes precedence as that seems to be standard across
cURL, Python, and wget -- yes, I agree -- it is nuts!

For a reference on the used environment variables and their
precedence see: https://superuser.com/a/1690537

Author: malthejorgensen

packages/python-sdk/e2b/api/client_async/__init__.py

@@ -4,7 +4,7 @@
 
 from typing import Dict
 
-from e2b.connection_config import ConnectionConfig
+from e2b.connection_config import ConnectionConfig, _resolve_proxy
 from e2b.api import limits, AsyncApiClient
 
 
@@ -45,7 +45,7 @@ def get_transport(config: ConnectionConfig) -> AsyncTransportWithLogger:
 
     transport = AsyncTransportWithLogger(
         limits=limits,
-        proxy=config.proxy,
+        proxy=_resolve_proxy(config.proxy),
     )
     AsyncTransportWithLogger._instances[loop_id] = transport
     return transport

packages/python-sdk/e2b/api/client_sync/__init__.py

@@ -4,7 +4,7 @@
 import logging
 
 from e2b.api import ApiClient, limits
-from e2b.connection_config import ConnectionConfig
+from e2b.connection_config import ConnectionConfig, _resolve_proxy
 
 logger = logging.getLogger(__name__)
 
@@ -44,7 +44,7 @@ def get_transport(config: ConnectionConfig) -> TransportWithLogger:
 
     transport = TransportWithLogger(
         limits=limits,
-        proxy=config.proxy,
+        proxy=_resolve_proxy(config.proxy),
     )
     TransportWithLogger.singleton = transport
     return transport

packages/python-sdk/e2b/connection_config.py

@@ -208,6 +208,25 @@ def sandbox_headers(self):
         }
 
 
+def _resolve_proxy(proxy: Optional[ProxyTypes]) -> Optional[ProxyTypes]:
+    """
+    Resolve the proxy to use for a request.
+    If an explicit proxy is provided, use it. Otherwise, fall back to
+    standard environment variables (HTTPS_PROXY, HTTP_PROXY, ALL_PROXY).
+    """
+    if proxy is not None:
+        return proxy
+
+    return (
+        os.environ.get("https_proxy")
+        or os.environ.get("HTTPS_PROXY")
+        or os.environ.get("http_proxy")
+        or os.environ.get("HTTP_PROXY")
+        or os.environ.get("all_proxy")
+        or os.environ.get("ALL_PROXY")
+    )
+
+
 Username = str
 """
 User used for the operation in the sandbox.

packages/python-sdk/e2b/volume/client_async/__init__.py

@@ -8,6 +8,7 @@
 from e2b.api.metadata import default_headers
 from e2b.exceptions import AuthenticationException
 from e2b.volume.client.client import AuthenticatedClient as AsyncVolumeApiClient
+from e2b.connection_config import _resolve_proxy
 from e2b.volume.connection_config import VolumeConnectionConfig
 
 logger = logging.getLogger(__name__)
@@ -63,7 +64,7 @@ def get_transport(config: VolumeConnectionConfig) -> AsyncTransportWithLogger:
 
     transport = AsyncTransportWithLogger(
         limits=limits,
-        proxy=config.proxy,
+        proxy=_resolve_proxy(config.proxy),
     )
     AsyncTransportWithLogger.singleton = transport
     return transport

packages/python-sdk/e2b/volume/client_sync/__init__.py

@@ -8,6 +8,7 @@
 from e2b.api.metadata import default_headers
 from e2b.exceptions import AuthenticationException
 from e2b.volume.client.client import AuthenticatedClient as VolumeApiClient
+from e2b.connection_config import _resolve_proxy
 from e2b.volume.connection_config import VolumeConnectionConfig
 
 logger = logging.getLogger(__name__)
@@ -63,7 +64,7 @@ def get_transport(config: VolumeConnectionConfig) -> TransportWithLogger:
 
     transport = TransportWithLogger(
         limits=limits,
-        proxy=config.proxy,
+        proxy=_resolve_proxy(config.proxy),
     )
     TransportWithLogger.singleton = transport
     return transport