TypeError: headers[headerName].trim is not a function

[chhornponleu]

Hi! 👋

Firstly, thanks for your work on this project! 🙂

Today I used patch-package to patch @smithy/signature-v4@2.1.3 for the project I'm working on.

Here is the diff that solved my problem:

diff --git a/node_modules/@smithy/signature-v4/dist-cjs/index.js b/node_modules/@smithy/signature-v4/dist-cjs/index.js
index fd7e634..66d27b8 100644
--- a/node_modules/@smithy/signature-v4/dist-cjs/index.js
+++ b/node_modules/@smithy/signature-v4/dist-cjs/index.js
@@ -126,7 +126,12 @@ var getCanonicalHeaders = /* @__PURE__ */ __name(({ headers }, unsignableHeaders
         continue;
       }
     }
-    canonical[canonicalHeaderName] = headers[headerName].trim().replace(/\s+/g, " ");
+    if (typeof headers?.[headerName] === 'string') {
+      canonical[canonicalHeaderName] = headers[headerName].trim().replace(/\s+/g, " ");
+    }
+    else {
+      canonical[canonicalHeaderName] = headers[headerName]
+    }
   }
   return canonical;
 }, "getCanonicalHeaders");
@@ -435,8 +440,8 @@ ${(0, import_util_hex_encoding.toHex)(hashedRequest)}`;
   }
   validateResolvedCredentials(credentials) {
     if (typeof credentials !== "object" || // @ts-expect-error: Property 'accessKeyId' does not exist on type 'object'.ts(2339)
-    typeof credentials.accessKeyId !== "string" || // @ts-expect-error: Property 'secretAccessKey' does not exist on type 'object'.ts(2339)
-    typeof credentials.secretAccessKey !== "string") {
+      typeof credentials.accessKeyId !== "string" || // @ts-expect-error: Property 'secretAccessKey' does not exist on type 'object'.ts(2339)
+      typeof credentials.secretAccessKey !== "string") {
       throw new Error("Resolved credential object is not valid");
     }
   }

This issue body was partially generated by patch-package.