Add httpx session in http.py (#475)

src/solana/rpc/providers/http.py

@@ -1,6 +1,6 @@
 """HTTP RPC Provider."""
 
-from typing import Tuple, Type, overload
+from typing import Optional, Tuple, Dict, Type, overload
 
 import httpx
 from solders.rpc.requests import Body
@@ -9,6 +9,7 @@
 from ...exceptions import SolanaRpcException, handle_exceptions
 from .base import BaseProvider
 from .core import (
+    DEFAULT_TIMEOUT,
     T,
     _after_request_unparsed,
     _BodiesTup,
@@ -39,6 +40,16 @@
 class HTTPProvider(BaseProvider, _HTTPProviderCore):
     """HTTP provider to interact with the http rpc endpoint."""
 
+    def __init__(
+        self,
+        endpoint: Optional[str] = None,
+        extra_headers: Optional[Dict[str, str]] = None,
+        timeout: float = DEFAULT_TIMEOUT,
+    ):
+        """Init HTTPProvider."""
+        super().__init__(endpoint, extra_headers)
+        self.session = httpx.Client(timeout=timeout)
+
     def __str__(self) -> str:
         """String definition for HTTPProvider."""
         return f"HTTP RPC connection {self.endpoint_uri}"
@@ -52,13 +63,13 @@ def make_request(self, body: Body, parser: Type[T]) -> T:
     def make_request_unparsed(self, body: Body) -> str:
         """Make an async HTTP request to an http rpc endpoint."""
         request_kwargs = self._before_request(body=body)
-        raw_response = httpx.post(**request_kwargs)
+        raw_response = self.session.post(**request_kwargs)
         return _after_request_unparsed(raw_response)
 
     def make_batch_request_unparsed(self, reqs: Tuple[Body, ...]) -> str:
         """Make an async HTTP request to an http rpc endpoint."""
         request_kwargs = self._before_batch_request(reqs)
-        raw_response = httpx.post(**request_kwargs)
+        raw_response = self.session.post(**request_kwargs)
         return _after_request_unparsed(raw_response)
 
     @overload

tests/unit/test_client.py

@@ -22,7 +22,7 @@ def test_client_http_exception(unit_test_http_client):
         with pytest.raises(SolanaRpcException) as exc_info:
             unit_test_http_client.get_epoch_info()
         assert exc_info.type == SolanaRpcException
-        assert exc_info.value.error_msg == "<class 'httpx.ReadTimeout'> raised in \"GetEpochInfo\" endpoint request"
+        assert exc_info.value.error_msg == "<class 'httpx.ConnectError'> raised in \"GetEpochInfo\" endpoint request"
 
 
 def test_client_address_sig_args_no_commitment(unit_test_http_client):