Update CRT HTTP client to include the port in the host for the CRT client if it adds the header

Author: SamRemis

packages/smithy-http/src/smithy_http/aio/crt.py

@@ -273,7 +273,7 @@ def _marshal_request(
         headers_list: list[tuple[str, str]] = []
         if "host" not in request.fields:
             request.fields.set_field(
-                Field(name="host", values=[request.destination.host])
+                Field(name="host", values=[request.destination.netloc])
             )
 
         if "accept" not in request.fields:

packages/smithy-http/tests/unit/aio/test_crt.py

@@ -44,6 +44,19 @@ def test_client_marshal_request() -> None:
     assert crt_request.method == "GET"
     assert crt_request.path == "/path?key1=value1&key2=value2"
 
+async def test_port_included_in_host_header() -> None:
+    client = AWSCRTHTTPClient()
+    request = HTTPRequest(
+        method="GET",
+        destination=URI(
+            host="example.com", path="/path", query="key1=value1&key2=value2", port=8443
+        ),
+        body=BytesIO(),
+        fields=Fields(),
+    )
+    crt_request, _ = await client._marshal_request(request)  # type: ignore
+    assert crt_request.headers.get("host") == "example.com:8443"  # type: ignore
+
 
 async def test_body_generator_bytes() -> None:
     """Test body generator with bytes input."""