fix(event_handler): expanding safe URI characters to include +$& (#3026)

Author: nejcskofic

aws_lambda_powertools/event_handler/api_gateway.py

@@ -41,7 +41,7 @@
 logger = logging.getLogger(__name__)
 
 _DYNAMIC_ROUTE_PATTERN = r"(<\w+>)"
-_SAFE_URI = "-._~()'!*:@,;="  # https://www.ietf.org/rfc/rfc3986.txt
+_SAFE_URI = "-._~()'!*:@,;=+&$"  # https://www.ietf.org/rfc/rfc3986.txt
 # API GW/ALB decode non-safe URI chars; we must support them too
 _UNSAFE_URI = r"%<> \[\]{}|^"
 _NAMED_GROUP_BOUNDARY_PATTERN = rf"(?P\1[{_SAFE_URI}{_UNSAFE_URI}\\w]+)"

tests/functional/event_handler/test_api_gateway.py

@@ -989,7 +989,7 @@ def get_network_account(account_id: str, network_id: str):
     [
         pytest.param(123456789, id="num"),
         pytest.param("[email protected]", id="email"),
-        pytest.param("-._~'!*:@,;()=", id="safe-rfc3986"),
+        pytest.param("-._~'!*:@,;()=+&$", id="safe-rfc3986"),
         pytest.param("%<>[]{}|^", id="unsafe-rfc3986"),
     ],
 )