/**
* Uploads a part of a multipart object upload
*
* @param Input $input Input data. You MUST specify the UploadID and PartNumber
* @param string $bucket Bucket name
* @param string $uri Object URI
* @param array $requestHeaders Array of request headers or content type as a string
* @param int $chunkSize Size of each upload chunk, in bytes. It cannot be less than 5242880 bytes (5Mb)
*
* @return null|string The ETag of the upload part of null if we have ran out of parts to upload
*/
public function uploadMultipart(Input $input, $bucket, $uri, $requestHeaders = array(), $chunkSize = 5242880)
{
if ($chunkSize < 5242880) {
$chunkSize = 5242880;
}
// We need a valid UploadID and PartNumber
$UploadID = $input->getUploadID();
$PartNumber = $input->getPartNumber();
if (empty($UploadID)) {
throw new CannotPutFile(__METHOD__ . '(): No UploadID specified');
}
if (empty($PartNumber)) {
throw new CannotPutFile(__METHOD__ . '(): No PartNumber specified');
}
$UploadID = urlencode($UploadID);
$PartNumber = (int) $PartNumber;
$request = new Request('PUT', $bucket, $uri, $this->configuration);
$request->setParameter('partNumber', $PartNumber);
$request->setParameter('uploadId', $UploadID);
$request->setInput($input);
// Full data length
$totalSize = $input->getSize();
// No Content-Type for multipart uploads
$input->setType(null);
// Calculate part offset
$partOffset = $chunkSize * ($PartNumber - 1);
if ($partOffset > $totalSize) {
// This is to signify that we ran out of parts ;)
return null;
}
// How many parts are there?
$totalParts = floor($totalSize / $chunkSize);
if ($totalParts * $chunkSize < $totalSize) {
$totalParts++;
}
// Calculate Content-Length
$size = $chunkSize;
if ($PartNumber >= $totalParts) {
$size = $totalSize - ($PartNumber - 1) * $chunkSize;
}
if ($size <= 0) {
// This is to signify that we ran out of parts ;)
return null;
}
$input->setSize($size);
switch ($input->getInputType()) {
case Input::INPUT_DATA:
$input->setData(substr($input->getData(), ($PartNumber - 1) * $chunkSize, $input->getSize()));
break;
case Input::INPUT_FILE:
case Input::INPUT_RESOURCE:
$fp = $input->getFp();
fseek($fp, ($PartNumber - 1) * $chunkSize);
break;
}
// Custom request headers (Content-Type, Content-Disposition, Content-Encoding)
if (is_array($requestHeaders)) {
foreach ($requestHeaders as $h => $v) {
if (strtolower(substr($h, 0, 6)) == 'x-amz-') {
$request->setAmzHeader(strtolower($h), $v);
} else {
$request->setHeader($h, $v);
}
}
}
$request->setHeader('Content-Length', $input->getSize());
$response = $request->getResponse();
if ($response->code !== 200) {
if (!$response->error->isError()) {
$response->error = new Error($response->code, "Unexpected HTTP status {$response->code}");
}
if (is_object($response->body) && $response->body instanceof \SimpleXMLElement && strpos($input->getSize(), ',') === false) {
// For some moronic reason, trying to multipart upload files on some hosts comes back with a stupid
// error from Amazon that we need to set Content-Length:5242880,5242880 instead of
// Content-Length:5242880 which is AGAINST Amazon's documentation. In this case we pass the header
// 'workaround-braindead-error-from-amazon' and retry. Screw you too, Amazon, you bloody idiots!
if (isset($response->body->CanonicalRequest)) {
$amazonsCanonicalRequest = (string) $response->body->CanonicalRequest;
$lines = explode("\n", $amazonsCanonicalRequest);
foreach ($lines as $line) {
if (substr($line, 0, 15) != 'content-length:') {
continue;
}
list($junk, $stupidAmazonDefinedContentLength) = explode(":", $line);
if (strpos($stupidAmazonDefinedContentLength, ',') !== false) {
if (!isset($requestHeaders['workaround-braindead-error-from-amazon'])) {
$requestHeaders['workaround-braindead-error-from-amazon'] = 'you can\'t fix stupid';
return $this->uploadMultipart($input, $bucket, $uri, $requestHeaders, $chunkSize);
}
}
}
}
}
throw new CannotPutFile(sprintf(__METHOD__ . "(): [%s] %s\n\nDebug info:\n%s", $response->error->getCode(), $response->error->getMessage(), print_r($response->body, true)));
}
// Return the ETag header
return $response->headers['hash'];
}
