NAME
   Net::Amazon::S3 - Use the Amazon S3 - Simple Storage Service

SYNOPSIS
     use Net::Amazon::S3;
     my $aws_access_key_id     = 'fill me in';
     my $aws_secret_access_key = 'fill me in too';

     my $s3 = Net::Amazon::S3->new(
         {   aws_access_key_id     => $aws_access_key_id,
             aws_secret_access_key => $aws_secret_access_key,
         }
     );

     # a bucket is a globally-unique directory
     # list all buckets that i own
     my $response = $s3->buckets;
     foreach my $bucket ( @{ $response->{buckets} } ) {
         print "You have a bucket: " . $bucket->bucket . "\n";
     }

     # create a new bucket
     my $bucketname = 'acmes_photo_backups';
     my $bucket = $s3->add_bucket( { bucket => $bucketname } )
         or die $s3->err . ": " . $s3->errstr;

     # or use an existing bucket
     $bucket = $s3->bucket($bucketname);

     # store a file in the bucket
     $bucket->add_key_filename( '1.JPG', 'DSC06256.JPG',
         { content_type => 'image/jpeg', },
     ) or die $s3->err . ": " . $s3->errstr;

     # store a value in the bucket
     $bucket->add_key( 'reminder.txt', 'this is where my photos are backed up' )
         or die $s3->err . ": " . $s3->errstr;

     # list files in the bucket
     $response = $bucket->list_all
         or die $s3->err . ": " . $s3->errstr;
     foreach my $key ( @{ $response->{keys} } ) {
         my $key_name = $key->{key};
         my $key_size = $key->{size};
         print "Bucket contains key '$key_name' of size $key_size\n";
     }

     # fetch file from the bucket
     $response = $bucket->get_key_filename( '1.JPG', 'GET', 'backup.jpg' )
         or die $s3->err . ": " . $s3->errstr;

     # fetch value from the bucket
     $response = $bucket->get_key('reminder.txt')
         or die $s3->err . ": " . $s3->errstr;
     print "reminder.txt:\n";
     print "  content length: " . $response->{content_length} . "\n";
     print "    content type: " . $response->{content_type} . "\n";
     print "            etag: " . $response->{content_type} . "\n";
     print "         content: " . $response->{value} . "\n";

     # delete keys
     $bucket->delete_key('reminder.txt') or die $s3->err . ": " . $s3->errstr;
     $bucket->delete_key('1.JPG')        or die $s3->err . ": " . $s3->errstr;

     # and finally delete the bucket
     $bucket->delete_bucket or die $s3->err . ": " . $s3->errstr;

DESCRIPTION
   This module provides a Perlish interface to Amazon S3. From the
   developer blurb: "Amazon S3 is storage for the Internet. It is designed
   to make web-scale computing easier for developers. Amazon S3 provides a
   simple web services interface that can be used to store and retrieve any
   amount of data, at any time, from anywhere on the web. It gives any
   developer access to the same highly scalable, reliable, fast,
   inexpensive data storage infrastructure that Amazon uses to run its own
   global network of web sites. The service aims to maximize benefits of
   scale and to pass those benefits on to developers".

   To find out more about S3, please visit: http://s3.amazonaws.com/

   To use this module you will need to sign up to Amazon Web Services and
   provide an "Access Key ID" and " Secret Access Key". If you use this
   module, you will incurr costs as specified by Amazon. Please check the
   costs. If you use this module with your Access Key ID and Secret Access
   Key you must be responsible for these costs.

   I highly recommend reading all about S3, but in a nutshell data is
   stored in values. Values are referenced by keys, and keys are stored in
   buckets. Bucket names are global.

METHODS
 new
   Create a new S3 client object. Takes some arguments:

   aws_access_key_id
       Use your Access Key ID as the value of the AWSAccessKeyId parameter
       in requests you send to Amazon Web Services (when required). Your
       Access Key ID identifies you as the party responsible for the
       request.

   aws_secret_access_key
       Since your Access Key ID is not encrypted in requests to AWS, it
       could be discovered and used by anyone. Services that are not free
       require you to provide additional information, a request signature,
       to verify that a request containing your unique Access Key ID could
       only have come from you.

       DO NOT INCLUDE THIS IN SCRIPTS OR APPLICATIONS YOU DISTRIBUTE.
       YOU'LL BE SORRY

   secure
       Set this to 1 if you want to use SSL-encrypted connections when
       talking to S3. Defaults to 0.

   timeout
       How many seconds should your script wait before bailing on a request
       to S3? Defaults to 30.

   retry
       If this library should retry upon errors. This option is
       recommended. This uses exponential backoff with retries after 1, 2,
       4, 8, 16, 32 seconds, as recommended by Amazon.

 buckets
   Returns undef on error, else hashref of results

 add_bucket
   Takes a hashref:

   bucket
       The name of the bucket you want to add

   acl_short (optional)
       See the set_acl subroutine for documenation on the acl_short options

   location_constraint (option)
       Sets the location constraint of the new bucket. If left unspecified,
       the default S3 datacenter location will be used. Otherwise, you can
       set it to 'EU' for a European data center - note that costs are
       different.

   Returns 0 on failure, Net::Amazon::S3::Bucket object on success

 bucket BUCKET
   Takes a scalar argument, the name of the bucket you're creating

   Returns an (unverified) bucket object from an account. Does no network
   access.

 delete_bucket
   Takes either a Net::Amazon::S3::Bucket object or a hashref containing

   bucket
       The name of the bucket to remove

   Returns false (and fails) if the bucket isn't empty.

   Returns true if the bucket is successfully deleted.

 list_bucket
   List all keys in this bucket.

   Takes a hashref of arguments:

   MANDATORY

   bucket
       The name of the bucket you want to list keys on

   OPTIONAL

   prefix
       Restricts the response to only contain results that begin with the
       specified prefix. If you omit this optional argument, the value of
       prefix for your query will be the empty string. In other words, the
       results will be not be restricted by prefix.

   delimiter
       If this optional, Unicode string parameter is included with your
       request, then keys that contain the same string between the prefix
       and the first occurrence of the delimiter will be rolled up into a
       single result element in the CommonPrefixes collection. These
       rolled-up keys are not returned elsewhere in the response. For
       example, with prefix="USA/" and delimiter="/", the matching keys
       "USA/Oregon/Salem" and "USA/Oregon/Portland" would be summarized in
       the response as a single "USA/Oregon" element in the CommonPrefixes
       collection. If an otherwise matching key does not contain the
       delimiter after the prefix, it appears in the Contents collection.

       Each element in the CommonPrefixes collection counts as one against
       the MaxKeys limit. The rolled-up keys represented by each
       CommonPrefixes element do not. If the Delimiter parameter is not
       present in your request, keys in the result set will not be
       rolled-up and neither the CommonPrefixes collection nor the
       NextMarker element will be present in the response.

   max-keys
       This optional argument limits the number of results returned in
       response to your query. Amazon S3 will return no more than this
       number of results, but possibly less. Even if max-keys is not
       specified, Amazon S3 will limit the number of results in the
       response. Check the IsTruncated flag to see if your results are
       incomplete. If so, use the Marker parameter to request the next page
       of results. For the purpose of counting max-keys, a 'result' is
       either a key in the 'Contents' collection, or a delimited prefix in
       the 'CommonPrefixes' collection. So for delimiter requests, max-keys
       limits the total number of list results, not just the number of
       keys.

   marker
       This optional parameter enables pagination of large result sets.
       "marker" specifies where in the result set to resume listing. It
       restricts the response to only contain results that occur
       alphabetically after the value of marker. To retrieve the next page
       of results, use the last key from the current page of results as the
       marker in your next request.

       See also "next_marker", below.

       If "marker" is omitted,the first page of results is returned.

   Returns undef on error and a hashref of data on success:

   The hashref looks like this:

     {
           bucket          => $bucket_name,
           prefix          => $bucket_prefix,
           common_prefixes => [$prefix1,$prefix2,...]
           marker          => $bucket_marker,
           next_marker     => $bucket_next_available_marker,
           max_keys        => $bucket_max_keys,
           is_truncated    => $bucket_is_truncated_boolean
           keys            => [$key1,$key2,...]
      }

   Explanation of bits of that:

   common_prefixes
       If list_bucket was requested with a delimiter, common_prefixes will
       contain a list of prefixes matching that delimiter. Drill down into
       these prefixes by making another request with the prefix parameter.

   is_truncated
       B flag that indicates whether or not all results of your query were
       returned in this response. If your results were truncated, you can
       make a follow-up paginated request using the Marker parameter to
       retrieve the rest of the results.

   next_marker
       A convenience element, useful when paginating with delimiters. The
       value of "next_marker", if present, is the largest (alphabetically)
       of all key names and all CommonPrefixes prefixes in the response. If
       the "is_truncated" flag is set, request the next page of results by
       setting "marker" to the value of "next_marker". This element is only
       present in the response if the "delimiter" parameter was sent with
       the request.

   Each key is a hashref that looks like this:

        {
           key           => $key,
           last_modified => $last_mod_date,
           etag          => $etag, # An MD5 sum of the stored content.
           size          => $size, # Bytes
           storage_class => $storage_class # Doc?
           owner_id      => $owner_id,
           owner_displayname => $owner_name
       }

 list_bucket_all
   List all keys in this bucket without having to worry about 'marker'.
   This is a convenience method, but may make multiple requests to S3 under
   the hood.

   Takes the same arguments as list_bucket.

 add_key
   DEPRECATED. DO NOT USE

 get_key
   DEPRECATED. DO NOT USE

 head_key
   DEPRECATED. DO NOT USE

 delete_key
   DEPRECATED. DO NOT USE

ABOUT
   This module contains code modified from Amazon that contains the
   following notice:

     #  This software code is made available "AS IS" without warranties of any
     #  kind.  You may copy, display, modify and redistribute the software
     #  code either by itself or as incorporated into your code; provided that
     #  you do not remove any proprietary notices.  Your use of this software
     #  code is at your own risk and you waive any claim against Amazon
     #  Digital Services, Inc. or its affiliates with respect to your use of
     #  this software code. (c) 2006 Amazon Digital Services, Inc. or its
     #  affiliates.

TESTING
   Testing S3 is a tricky thing. Amazon wants to charge you a bit of money
   each time you use their service. And yes, testing counts as using.
   Because of this, the application's test suite skips anything approaching
   a real test unless you set these three environment variables:

   AMAZON_S3_EXPENSIVE_TESTS
       Doesn't matter what you set it to. Just has to be set

   AWS_ACCESS_KEY_ID
       Your AWS access key

   AWS_ACCESS_KEY_SECRET
       Your AWS sekkr1t passkey. Be forewarned that setting this
       environment variable on a shared system might leak that information
       to another user. Be careful.

AUTHOR
   Leon Brocard <[email protected]> and unknown Amazon Digital Services
   programmers.

   Brad Fitzpatrick <[email protected]> - return values, Bucket object

SEE ALSO
   Net::Amazon::S3::Bucket

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