Enabling Cross-Origin Resource Sharing. Bucket CORS Configuration.
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Bucket CORS Configuration - Table of Contents

Cross-Origin Resource Sharing Overview

Cross-origin resource sharing (CORS) is a web browser technology specification that defines ways for a web server to allow its resources to be accessed by a web page from a different domain - From Wikipedia, the free encyclopedia.

Recently Amazon S3 Team announced suppor for Cross-Origin Resource Sharing (CORS). You can now configure your bucket to allow cross-origin resource access using simple CORS configuration rules.

Since version 3.6.1 S3 Browser Freeware provides you an easy way to manage CORS configuration rules.

To edit Bucket CORS Configuration

1. Click Buckets -> CORS Configuration...

Edit Bucket CORS Configuration.

You can also use Ctrl+R keyboard shortcut to open CORS Configuration Editor.

CORS Configuration Editor will open:

amazon s3 bucket cors configuration editor

CORS Configuration Editor dialog.

2. Enter or edit CORS Configuration and click the Apply button.

See some CORS configuration examples below and AWS Documentation for more details.

Examples of Bucket CORS Configuration

<CORSConfiguration>
 <CORSRule>
   <AllowedOrigin>http://www.example.com</AllowedOrigin>

   <AllowedMethod>PUT</AllowedMethod>
   <AllowedMethod>POST</AllowedMethod>
   <AllowedMethod>DELETE</AllowedMethod>

   <AllowedHeader>*</AllowedHeader>
 </CORSRule>
 <CORSRule>
   <AllowedOrigin>*</AllowedOrigin>
   <AllowedMethod>GET</AllowedMethod>
 </CORSRule>
</CORSConfiguration>

The CORS configuration also allows optional configuration parameters:

<CORSConfiguration>
 <CORSRule>
   <AllowedOrigin>http://www.example.com</AllowedOrigin>
   <AllowedMethod>PUT</AllowedMethod>
   <AllowedMethod>POST</AllowedMethod>
   <AllowedMethod>DELETE</AllowedMethod>
   <AllowedHeader>*</AllowedHeader>
  <MaxAgeSeconds>3000</MaxAgeSeconds>
  <ExposeHeader>x-amz-server-side-encryption</ExposeHeader>
  <ExposeHeader>x-amz-request-id</ExposeHeader>
  <ExposeHeader>x-amz-id-2</ExposeHeader>
 </CORSRule>
</CORSConfiguration>

See AWS Documentation for elements description.

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