Question

I store my newsletters .html files in S3 and I have created a function that pulls the newsletters and puts them into iFrames.

My problem is I can’t set an auto height for the iFrames because I can’t read the content.

I have a plugin that works if the files are on the same domain. Can I set some headers to allow access from my sub-domain?

Answer 1

S3 has a feature called “Virtual Hosting”.

Virtual Hosting, in general, is the practice of serving multiple web
sites from a single web server. One way to differentiate sites is by
using the apparent host name of the request instead of just the path
name part of the URI. An ordinary Amazon S3 REST request specifies a
bucket using the first slash delimited component of the Request-URI
path. Alternatively, using Amazon S3 Virtual Hosting, you can address
a bucket in a REST API call using the HTTP Host header. In practice,
Amazon S3 interprets Host as meaning that most buckets are
automatically accessible (for limited types of requests) at
http://bucketname.s3.amazonaws.com. Furthermore, by naming your bucket
after your registered domain name and by making that name a DNS alias
for Amazon S3, you can completely customize the URL of your Amazon S3
resources, for example: http://my.bucketname.com/

Try mapping your S3 bucket to your domain.

See here for an example.

Accessing S3 Buckets via Virtual Host URLs

S3 provides two ways to access your content. One way uses
s3.amazonaws.com host name URLs, such as this:

http://s3.amazonaws.com/mybucket.mydomain.com/myObjectKey

The other way to access your S3 content uses a virtual host name in
the URL:

http://mybucket.mydomain.com.s3.amazonaws.com/myObjectKey

Both of these URLs map to the same object in S3.

You can make the virtual host name URL shorter by setting up a DNS
CNAME that maps mybucket.mydomain.com to
mybucket.mydomain.com.s3.amazonaws.com. With this DNS CNAME alias in
place, the above URL can also be written as follows:

http://mybucket.mydomain.com/myObjectKey

This shorter virtual host name URL works only if you setup the DNS
CNAME alias for the bucket.