Perl

S3 Complete a Multipart Upload

See more Amazon S3 (new) Examples

This operation completes a multipart upload by assembling previously uploaded parts.

Processing of a Complete Multipart Upload request could take several minutes to complete. After Amazon S3 begins processing the request, it sends an HTTP response header that specifies a 200 OK response. While processing is in progress, Amazon S3 periodically sends whitespace characters to keep the connection from timing out. Because a request could fail after the initial 200 OK response has been sent, it is important that you check the response body to determine whether the request succeeded.

This example sends a POST request to complete a multipart upload, which looks like this:

POST /ObjectName?uploadId=UploadId HTTP/1.1
Host: BucketName.s3.amazonaws.com
Date: Date
Content-Length: Size
Authorization: authorization string

<CompleteMultipartUpload>
  <Part>
    <PartNumber>PartNumber</PartNumber>
    <ETag>ETag</ETag>
  </Part>
  ...
</CompleteMultipartUpload>

Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# The 1st step in an S3 multipart upload is to initiate it,
# as shown here: Initiate S3 Multipart Upload

# The 2nd step is to upload the parts
# as shown here: S3 Upload Parts

# The 3rd and final step (this example) is to complete the multipart upload.

# Other S3 Multipart Upload Examples:
# Abort Multipart Upload
# List Parts

# When the multipart upload was initiated, an UploadId was provided in the XML response, and it
# was saved to a file.  Steps 2 and 3 begin by loading the XML and getting
# the Upload ID.

my $xmlInit = Chilkat2::Xml->new;
my $success = $xmlInit->LoadXmlFile('s3_multipart_uploads/initiate.xml');
if (!$success) {
    print "Did not find the initiate.xml XML file.\n";
    exit;
}

my $uploadId = $xmlInit->GetChildContent('UploadId');
print 'UploadId = ', $uploadId, "\n";

# We'll also need the XML file that contains a record of the parts
# with part numbers and ETags.  (This file was produced when parts were being uploaded.)
my $xmlPartsList = Chilkat2::Xml->new;
$success = $xmlPartsList->LoadXmlFile('s3_multipart_uploads/partsList.xml');
if (!$success) {
    print "Did not find the partsList.xml XML file.\n";
    exit;
}

my $rest = Chilkat2::Rest->new;

# Connect to the Amazon AWS REST server.
my $bTls = 1;
my $port = 443;
my $bAutoReconnect = 1;
$success = $rest->Connect('s3.amazonaws.com', $port, $bTls, $bAutoReconnect);

# ----------------------------------------------------------------------------
# Important: For buckets created in regions outside us-east-1,
# there are three important changes that need to be made.
# See Working with S3 Buckets in Non-us-east-1 Regions for the details.
# ----------------------------------------------------------------------------

# Provide AWS credentials for the REST call.
my $authAws = Chilkat2::AuthAws->new;
$authAws->AccessKey('AWS_ACCESS_KEY');
$authAws->SecretKey('AWS_SECRET_KEY');
$authAws->ServiceName('s3');

$success = $rest->SetAuthAws($authAws);

# Set the bucket name via the HOST header.
# In this case, the bucket name is "chilkat100".
$rest->Host('chilkat100.s3.amazonaws.com');

# The "uploadId=UploadId" must be added as a query parameter.  This allows it to be
# incorporated into the AWS signature calculation, which is a requirement.
# Therefore, we use AddQueryParam:
$rest->AddQueryParam('uploadId', $uploadId);

# Our ObjectName in this case is "somethingBig.zip".
my $responseXml = $rest->FullRequestString('POST', '/somethingBig.zip', $xmlPartsList->GetXml());
if (!$rest->LastMethodSuccess) {
    print $rest->LastErrorText, "\n";
    exit;
}

# When successful, the S3 Storage service will respond with a 200 response code,
# with an XML body.
if ($rest->ResponseStatusCode != 200) {
    # Examine the request/response to see what happened.
    print 'response status code = ', $rest->ResponseStatusCode, "\n";
    print 'response status text = ', $rest->ResponseStatusText, "\n";
    print 'response header: ', $rest->ResponseHeader, "\n";
    print 'response body: ', $responseXml, "\n";
    print "---\n";
    print 'LastRequestStartLine: ', $rest->LastRequestStartLine, "\n";
    print 'LastRequestHeader: ', $rest->LastRequestHeader, "\n";
}

# Load the XML response into Chilkat XMl and emit via GetXml to see the XML in a pretty-printed (indented) readable format.
my $xml = Chilkat2::Xml->new;
$xml->LoadXml($responseXml);
print $xml->GetXml(), "\n";
print "----\n";

print "Multipart upload completed.\n";