(PHP Extension) (using AWS Signature Version 2) Streaming Download to File

The main purpose of this example is to demonstrate how to use the older Signature Version 2 authentication w/ S3. It uses V2 authentication to download a file.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

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

$rest = new CkRest();

// Connect to the Amazon AWS REST server.
$bTls = true;
$port = 443;
$bAutoReconnect = true;
// The file is located in the bucket named "chilkat100", which becomes part of the domain:
$success = $rest->Connect('chilkat100.s3.amazonaws.com',$port,$bTls,$bAutoReconnect);

// Provide AWS credentials for the REST call.
$authAws = new CkAuthAws();
$authAws->put_AccessKey('AWS_ACCESS_KEY');
$authAws->put_SecretKey('AWS_SECRET_KEY');
$authAws->put_ServiceName('s3');

// For AWS Signature Version 2, the following two properties need to be set:
$authAws->put_SignatureVersion(2);
// See http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html#ConstructingTheCanonicalizedResourceElement
$authAws->put_CanonicalizedResourceV2('/chilkat100/starfish.jpg');

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

// Send the request to download the JPG.
$success = $rest->SendReqNoBody('GET','/starfish.jpg');
if ($success != true) {
    print $rest->lastErrorText() . "\n";
    exit;
}

// Read the response header.
$responseStatusCode = $rest->ReadResponseHeader();
if ($responseStatusCode < 0) {
    print $rest->lastErrorText() . "\n";
    exit;
}

print 'Response status code = ' . $responseStatusCode . "\n";

// We expect a 200 response status if the JPG data is coming.
// Otherwise, we'll get a string response body with an error message(or no response body).
if ($responseStatusCode == 200) {

    $bodyStream = new CkStream();

    // The stream's sink will be a file.
    $bodyStream->put_SinkFile('qa_output/starfish.jpg');

    // Read the response body to the stream.  Given that we've
    // set the stream's sink to a file, it will stream directly
    // to the file.
    $success = $rest->ReadRespBodyStream($bodyStream,true);
    if ($success != true) {
        print $rest->lastErrorText() . "\n";
        exit;
    }

    print 'Successfully received the JPG file.' . "\n";

}
else {
    $errResponse = $rest->readRespBodyString();
    if ($rest->get_LastMethodSuccess() != true) {
        print $rest->lastErrorText() . "\n";
    }
    else {
        print $errResponse . "\n";
    }

}


?>