Adjust typing

Author: nateprewitt

.pre-commit-config.yaml

@@ -19,3 +19,4 @@ repos:
         additional_dependencies:
           - pytest
           - freezegun
+        exclude: '^examples/'

src/aws_sdk_signers/interfaces/http.py

@@ -122,7 +122,7 @@ class Request(Protocol):
     """Protocol-agnostic representation of a request."""
 
     destination: URI
-    body: AsyncIterable[bytes] | Iterable[bytes]
+    body: AsyncIterable[bytes] | Iterable[bytes] | None
 
 
 class URI(Protocol):

src/aws_sdk_signers/signers.py

@@ -731,12 +731,12 @@ async def _format_canonical_payload(
         checksum = sha256()
         if hasattr(body, "seek") and hasattr(body, "tell"):
             position = body.tell()
-            async for chunk in body:
+            async for chunk in body:  # type: ignore[union-attr]
                 checksum.update(chunk)
             await body.seek(position)
         else:
             buffer = io.BytesIO()
-            async for chunk in body:
+            async for chunk in body:  # type: ignore[union-attr]
                 buffer.write(chunk)
                 checksum.update(chunk)
             buffer.seek(0)