I need the following url
http://liangpai.s3.amazonaws.com/uploadImage/shareImage/2012-10/506dc1ef71dcf.png
showing as:
http://imgs.liangpai.me/uploadImag
Method 1 : S3 direct CNAME by bucket name
You can create a CNAME record by bucket name following these steps.
Create a bucket name using the same name you will use for your dns entry. i.e. subdomain.mydomain.net
Create a cname record for subdomain.mydomain.net to s3.amazonaws.com
Set permissions on your bucket based on the access you plan to grant
Method 2 : Static Website on S3
If you are serving static content such as images, files, etc. you can use "Static Website Hosting" for your S3 bucket.
Select your bucket by clicking the bucket icon () and select the "properties" tab on the right and expand "Static Website Hosting". In the Static Website Hosting panel, select the radio button to "Enable website hosting" and set an index and error document. It this point, you will see an "Endpoint" name in this panel. Simple create a DNS CNAME record with the endpoint as the value. You can read the entire Amazon Walkthrough here.