Perl

Generate an AWS (S3) Pre-Signed URL to Download File

See more Amazon S3 (new) Examples

Demonstrates how to generate a pre-signed URL to download a file from the Amazon S3 service. Perl

use chilkat();

$success = 0;

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

$http = chilkat::CkHttp->new();

$http->put_AwsAccessKey("AWS_ACCESS_KEY");
$http->put_AwsSecretKey("AWS_SECRET_KEY");

# Make sure to set your AWS region correctly
$http->put_AwsRegion("us-east-1");

$bucketName = "chilkat100";
$objectName = "starfish/starfish.jpg";
$localFilePath = "qa_output/starfish.jpg";
$awsService = "s3";

# The signed URL will be valid for this number of seconds:
$numSecondsValid = 86400;

# Choose between a URL beginning with "http://" or "https://"...
$bUseHttps = 0;

# Generate the pre-signed URL
$preSignedUrl = $http->s3_GenPresignedUrl("GET",$bUseHttps,$bucketName,$objectName,$numSecondsValid,$awsService);
if ($http->get_LastMethodSuccess() == 0) {
    print $http->lastErrorText() . "\r\n";
    exit;
}

# The following URL can be copy-and-pasted into a browser..
print "Pre-Signed AWS S3 URL: " . $preSignedUrl . "\r\n";

# Here's an example of a pre-signed URL. 
# This URL will only work within 1 day (86400 seconds) after the time this example was published.
# 
#     http://chilkat100.s3.amazonaws.com/starfish/starfish.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=16QXXDGY83AJJR6RVQ02%2F20170111%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20170111T161959Z&X-Amz-Expires=86400&X-Amz-SignedHeaders=host&X-Amz-Signature=72bf4fd9a15d7bbcdd313a3318d937a778905f62a3fbff9b789d8dc28acd9232

# Now try to do an HTTP Download using the signed URL.
$success = $http->Download($preSignedUrl,"c:/temp/qa_output/starfish.jpg");
if ($success == 0) {
    print $http->lastErrorText() . "\r\n";
    exit;
}

print "Success." . "\r\n";