Update SAM template and function code

Author: roblOnTour

lambda-s3-download/README.md

@@ -1,6 +1,6 @@
-# Lambda S3 Download
+# AWS Lambda to Amazon S3 — URL File Downloader
 
-This pattern deploys a Lambda function that downloads a file from a URL and uploads it to an S3 bucket using multipart upload. It streams the file in configurable chunks through `/tmp`, making it capable of handling files larger than Lambda's memory and storage limits.
+This pattern deploys an AWS Lambda function that downloads a file from a URL and stores it in Amazon S3 using multipart upload. It streams the file in configurable chunks through `/tmp`, making it capable of handling files larger than Lambda's memory and storage limits.
 
 Important: this application uses various AWS services and there are costs associated with these services after the Free Tier usage - please see the [AWS Pricing page](https://aws.amazon.com/pricing/) for details. You are responsible for any AWS costs incurred. No warranty is implied in this example.
 
@@ -93,6 +93,6 @@ Optional event parameters:
     aws cloudformation list-stacks --query "StackSummaries[?contains(StackName,'STACK_NAME')].StackStatus"
     ```
 ----
-Copyright 2025 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+Copyright 2026 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 
 SPDX-License-Identifier: MIT-0

lambda-s3-download/example-pattern.json

@@ -1,13 +1,13 @@
 {
-  "title": "Lambda S3 Download",
-  "description": "A Lambda function that downloads a file from a URL and uploads it to S3 using multipart upload with SHA256 checksums.",
+  "title": "AWS Lambda to Amazon S3 — URL File Downloader",
+  "description": "An AWS Lambda function that downloads a file from a URL and stores it in Amazon S3 using multipart upload with SHA256 checksums.",
   "language": "Python",
   "level": "300",
   "framework": "SAM",
   "introBox": {
     "headline": "How it works",
     "text": [
-      "This pattern deploys a Lambda function that streams a file from a URL and uploads it to an S3 bucket using multipart upload.",
+      "This pattern deploys an AWS Lambda function that streams a file from a URL and stores it in Amazon S3 using multipart upload.",
       "The file is downloaded in configurable chunks (default 512 MB, clamped between 5 MB and 5 GB) and written to /tmp before being uploaded as individual parts. Each chunk is cleaned up from /tmp after upload, allowing the function to handle files larger than Lambda's memory or ephemeral storage limits.",
       "SHA256 checksums are calculated for each part and verified on completion. If any step fails, the multipart upload is automatically aborted to avoid orphaned parts."
     ]

lambda-s3-download/src/app.py

@@ -49,7 +49,7 @@ def lambda_handler(event, context):
         return {
             "statusCode": 200,
             "body": json.dumps({
-                "message": f"{download_filename} uploaded successfully",
+                "message": f"{download_filename} downloaded and stored successfully",
                 "bucket": target_bucket,
                 "key": download_filename,
                 "checksum_sha256": objectSummary["Checksum"]["ChecksumSHA256"],

lambda-s3-download/template.yaml

@@ -1,6 +1,6 @@
 AWSTemplateFormatVersion: '2010-09-09'
 Transform: AWS::Serverless-2016-10-31
-Description: Lambda function that downloads a file from a URL and uploads it to S3 using multipart upload
+Description: AWS Lambda function that downloads a file from a URL and stores it in Amazon S3 using multipart upload
 
 Parameters:
   TargetBucketName:
@@ -14,8 +14,6 @@ Resources:
       Handler: app.lambda_handler
       Runtime: python3.12
       CodeUri: src/
-      Architectures:
-        - arm64
       Timeout: 900
       MemorySize: 1024
       EphemeralStorage:
@@ -29,5 +27,5 @@ Resources:
 
 Outputs:
   DownloadFunctionArn:
-    Description: Lambda function ARN
+    Description: Serverless Downloader Lambda function ARN
     Value: !GetAtt DownloadFunction.Arn