add async http client (#760)

skyvern/forge/sdk/core/async_http_client.py

@@ -0,0 +1,24 @@
+from typing import Any
+
+import httpx
+
+
+class AsyncHttpClient:
+    """
+    A wrapper of httpx client.
+    Functionalities:
+        1. It comes with a default httpx.AsyncClient instance.
+        2. The httx client could be replaced by a set_client method.
+    """
+
+    def __init__(self, proxy: str | None = None) -> None:
+        self.client = httpx.AsyncClient(proxy=proxy)
+
+    async def get(self, url: str) -> httpx.Response:
+        return await self.client.get(url)
+
+    async def post(self, url: str, data: dict[Any, Any] | None = None) -> httpx.Response:
+        return await self.client.post(url, data=data)
+
+    async def close(self) -> None:
+        await self.client.aclose()