Add lambda-s3-download pattern for streaming URL downloads to S3#2956
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roblOnTour wants to merge 1 commit intoaws-samples:mainfrom
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Add lambda-s3-download pattern for streaming URL downloads to S3#2956roblOnTour wants to merge 1 commit intoaws-samples:mainfrom
roblOnTour wants to merge 1 commit intoaws-samples:mainfrom
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biswanathmukherjee
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Feb 26, 2026
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biswanathmukherjee
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biswanathmukherjee
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There may be more review comments :)
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| # Lambda S3 Download | |||
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- Please provide a meaningful title.
- Also use the full AWS Service name e.g. AWS Lambda function, Amazon S3
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| # Lambda S3 Download | |||
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| 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. | |||
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The description says it is 'upload' to S3 functionality, however, the folder name has 'download'. Sounds contradicting?
| aws cloudformation list-stacks --query "StackSummaries[?contains(StackName,'STACK_NAME')].StackStatus" | ||
| ``` | ||
| ---- | ||
| Copyright 2025 Amazon.com, Inc. or its affiliates. All Rights Reserved. |
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| { | |||
| "title": "Lambda S3 Download", | |||
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- Please provide a meaningful title.
- Also use the full AWS Service name e.g. AWS Lambda function, Amazon S3
- Title should be <= 70 char long
| ``` | ||
| 1. Build the application: | ||
| ``` | ||
| sam build |
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Build failed with the following error
python3.12 architecture: x86_64 functions: DownloadFunction
Running PythonPipBuilder:ResolveDependencies
Build Failed
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Issue #, if available:
N/A
Description of changes:
New pattern:
lambda-s3-downloadA Lambda function (Python 3.12) that downloads a file from a URL and uploads it to S3 using multipart upload with SHA256 checksums. The file is streamed in configurable chunks through
/tmp, allowing it to handle files larger than Lambda's memory limit.Features:
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