Force comma delimiter when normalizing signing fields

jonathan343 · jonathan343 · commit 094d4e8157e0 · 2025-10-23T14:24:38.000-04:00
diff --git a/packages/aws-sdk-signers/src/aws_sdk_signers/signers.py b/packages/aws-sdk-signers/src/aws_sdk_signers/signers.py
@@ -705,7 +705,7 @@ async def _format_canonical_query(self, *, query: str | None) -> str:
 
     async def _normalize_signing_fields(self, *, request: AWSRequest) -> dict[str, str]:
         normalized_fields = {
-            field.name.lower(): field.as_string()
+            field.name.lower(): field.as_string(delimiter=",")
             for field in request.fields
             if self._is_signable_header(field.name.lower())
         }

Original file line number	Diff line number	Diff line change
`@@ -705,7 +705,7 @@ async def _format_canonical_query(self, *, query: str \| None) -> str:`
`705`	`705`
`706`	`706`	`async def _normalize_signing_fields(self, *, request: AWSRequest) -> dict[str, str]:`
`707`	`707`	`normalized_fields = {`
`708`		`- field.name.lower(): field.as_string()`
	`708`	`+ field.name.lower(): field.as_string(delimiter=",")`
`709`	`709`	`for field in request.fields`
`710`	`710`	`if self._is_signable_header(field.name.lower())`
`711`	`711`	`}`