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Amazon S3 supports POST, which allows your users to upload content directly to Amazon S3. POST is designed to simplify uploads, reduce upload latency, and save you money on applications where users upload data to store in Amazon S3.
The request authentication discussed in this section is based on AWS Signature Version 2, a protocol for authenticating inbound API requests to AWS services. Amazon S3 also supports Signature Version 4, in all AWS regions. If you are using Signature Version 4, go to Authenticating Requests in Browser-Based Uploads Using POST (AWS Signature Version 4) in the Amazon Simple Storage Service API Reference.
The following figure shows an upload using Amazon S3 POST.
Uploading Using POST
|1||The user opens a web browser and accesses your web page.|
|2||Your web page contains an HTTP form that contains all the information necessary for the user to upload content to Amazon S3.|
|3||The user uploads content directly to Amazon S3.|
Query string authentication is not supported for POST.