S3 accepts uploads via specially-crafted and pre-authorized HTML POST Form.<p>A simple gem will help you create two values: Signature and Policy - https:&#x2F;&#x2F;github.com&#x2F;vinhnglx&#x2F;s3-authorize<p>This gem is very useful when working with AngularJS file upload
Show HN: Simple Gem generates AWS S3 Policy and Signature