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<?php
/**
* Copyright 2012-2014 Rackspace US, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
namespace OpenCloud\ObjectStore\Upload;
use Guzzle\Http\EntityBody;
use Guzzle\Http\ReadLimitEntityBody;
use OpenCloud\Common\Constants\Size;
/**
* A transfer type which executes consecutively - i.e. it will upload an entire EntityBody and then move on to the next
* in a linear fashion. There is no concurrency here.
*
* @codeCoverageIgnore
*/
class ConsecutiveTransfer extends AbstractTransfer
{
public function transfer()
{
while (!$this->entityBody->isConsumed()) {
if ($this->entityBody->getContentLength() && $this->entityBody->isSeekable()) {
// Stream directly from the data
$body = new ReadLimitEntityBody($this->entityBody, $this->partSize, $this->entityBody->ftell());
} else {
// If not-seekable, read the data into a new, seekable "buffer"
$body = EntityBody::factory();
$output = true;
while ($body->getContentLength() < $this->partSize && $output !== false) {
// Write maximum of 10KB at a time
$length = min(10 * Size::KB, $this->partSize - $body->getContentLength());
$output = $body->write($this->entityBody->read($length));
}
}
if ($body->getContentLength() == 0) {
break;
}
$request = TransferPart::createRequest(
$body,
$this->transferState->count() + 1,
$this->client,
$this->options
);
$response = $request->send();
$this->transferState->addPart(TransferPart::fromResponse($response));
}
}
}