Chilkat Examples

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PHP Extension Web API Examples

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(PHP Extension) Wasabi File Streaming Upload

See more Wasabi Examples

Demonstrates how to do a streaming upload from a file to the Wasabi storage service. The AWS authorization presents some difficulties when the REST request body is to be streamed from a file (or from some other source). The issue is that the SHA-256 hash of the file data must be calculated. There are only two possible ways to do this: (1) stream the file into memory in its entirety and calculate the SHA-256 hash prior to uploading, or (2) pre-calculate the SHA-256 in a streaming fashion, and then provide it to the AWS authentication object.

If the application does NOT pre-compute the SHA-256, then Chilkat (internally) is forced to stream into memory, calculate the SHA-256, and then upload from the in-memory copy of the file.

Chilkat PHP Downloads

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

<?php

include("chilkat.php");
// Use "chilkat_9_5_0.php" for versions of Chilkat < 10.0.0

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

// This first part is optional.  AWS authentication requires
// the SHA-256 hash of the request body (i.e. the contents of the file
// to be uploaded).  We can choose to pre-calculate the SHA-256 in a streaming fashion
// and then provide it to the authenticator object.  This way, if the file is
// extremely large, it never needs to completely reside in memory.
$crypt = new CkCrypt2();
// ----------------------------------------------------
// Important: Wasabi requires a lowercase hex format.
// ----------------------------------------------------
$crypt->put_EncodingMode('hex-lower');
$crypt->put_HashAlgorithm('sha-256');
$fileToUploadPath = 'qa_data/xml/hamlet.xml';
$hashStr = $crypt->hashFileENC($fileToUploadPath);

$rest = new CkRest();

// Connect to the Amazon AWS REST server.
$bTls = true;
$port = 443;
$bAutoReconnect = true;
// This example will demonstrate uploading to a bucket in the eu-west-2 region
$success = $rest->Connect('s3.eu-west-2.wasabisys.com',$port,$bTls,$bAutoReconnect);

// Provide AWS credentials for the REST call.
$authAws = new CkAuthAws();
$authAws->put_AccessKey('access-key');
$authAws->put_SecretKey('secret-key');
$authAws->put_ServiceName('s3');
// Provide the pre-computed SHA-256 here:
$authAws->put_PrecomputedSha256($hashStr);

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

$rest->AddHeader('Expect','100-continue');
$rest->AddHeader('Content-Type','application/xml');

// Set the bucket name via the HOST header.
// In this case, the bucket name is "chilkat100".
$rest->put_Host('chilkat100.s3.eu-west-2.wasabisys.com');

$fileStream = new CkStream();
$fileStream->put_SourceFile($fileToUploadPath);

// Upload to the Wasabi Storage service.
// If the application provided the SHA-256 hash of the file contents (as shown above)
// then file is streamed and never has to completely reside in memory.
// If the application did NOT provide the SHA-256, then Chilkat will (internally) 
// load the entire file into memory, calculate the SHA-256, and then upload.
$responseStr = $rest->fullRequestStream('PUT','/hamlet.xml',$fileStream);
if ($rest->get_LastMethodSuccess() != true) {
    print $rest->lastErrorText() . "\n";
    exit;
}

// When successful, the Wasabi Storage service will respond with a 200 response code,
// with an XML body.  
if ($rest->get_ResponseStatusCode() == 200) {
    print $responseStr . "\n";
    print 'File uploaded.' . "\n";
}
else {
    // Examine the request/response to see what happened.
    print 'response status code = ' . $rest->get_ResponseStatusCode() . "\n";
    print 'response status text = ' . $rest->responseStatusText() . "\n";
    print 'response header: ' . $rest->responseHeader() . "\n";
    print 'response body: ' . $responseStr . "\n";
    print '---' . "\n";
    print 'LastRequestStartLine: ' . $rest->lastRequestStartLine() . "\n";
    print 'LastRequestHeader: ' . $rest->lastRequestHeader() . "\n";
}


?>

 

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