(PHP ActiveX) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

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

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Http')
$http = new COM("Chilkat.Http");

$http->AwsAccessKey = 'AWS_ACCESS_KEY';
$http->AwsSecretKey = 'AWS_SECRET_KEY';

// Make sure to set your AWS region correctly
$http->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->LastMethodSuccess != 1) {
    print $http->LastErrorText . "\n";
    exit;
}

// The following URL can be copy-and-pasted into a browser..
print 'Pre-Signed AWS S3 URL: ' . $preSignedUrl . "\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 . "\n";
}
else {
    print 'Success.' . "\n";
}


?>