first commit

backend/app/http_client.py

@@ -0,0 +1,24 @@
+"""Shared HTTP client options (optional SOCKS5 proxy)."""
+
+from .config import settings
+
+
+def proxy_for(target: str) -> str | None:
+    """
+    target: 'binance' | 'wecom'
+    Returns proxy URL when enabled and scope matches.
+    """
+    if not settings.proxy_enabled or not settings.proxy_url.strip():
+        return None
+    scope = settings.proxy_for.lower()
+    if scope == "all" or scope == target:
+        return settings.proxy_url.strip()
+    return None
+
+
+def httpx_client_kwargs(target: str, **extra) -> dict:
+    kwargs = dict(extra)
+    proxy = proxy_for(target)
+    if proxy:
+        kwargs["proxy"] = proxy
+    return kwargs