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(Perl) Generate an AWS (S3) Pre-Signed URL using Signature V4

Demonstrates how to generate a pre-signed URL using AWS Signature Version 4. This example generates a pre-signed URL for the Amazon S3 service.

Note: this example requires Chilkat v9.5.0.66 or greater.

Chilkat Perl Downloads

Perl Module for Windows, Linux, Alpine Linux,
MAC OS X, Solaris, FreeBSD, OpenBSD,
Raspberry Pi and other single board computers

use chilkat();

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

# Note: This example requires Chilkat v9.5.0.66 or greater.

$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 = $http->s3_GenerateUrlV4($bUseHttps,$bucketName,$objectName,$numSecondsValid,$awsService);
if ($http->get_LastMethodSuccess() != 1) {
    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,"qa_output/starfish.jpg");
if ($success != 1) {
    print $http->lastErrorText() . "\r\n";
}
else {
    print "Success." . "\r\n";
}


 

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