PHP S3 上传进度

Question

这已经发生了很多次，但我仍然有点困惑。很多答案只涉及上传进度条，而不是从 S3 上传中获得实际的上传进度。

我已经阅读了许多问题并找到了许多软件，但我仍然没有更深入地了解 S3 上传的基本问题。

有没有一种方法可以在了解上传进度的同时上传到 S3，而不必先使用我自己的应用服务器资源将文件存储在 temp 目录中？

我必须先将文件存储在自己的服务器上，然后再推送到 S3 吗？我听说有人谈论一次将流传输到 S3（一次一个块），但我不确定这涉及到什么。想象一下，我正在从 HTML 页面中的客户端上传文件，我将如何从多部分中逐块流式传输文件？ （我没有看到任何例子，只有当文件已经在你的系统上并且你知道块有点没用的时候的例子）。

在 API 文档中当然有一个上传进度示例，但同样假设文件首先在您的服务器上，并且不是来自用户提供的另一台计算机。

编辑：我最初的想法是制作一个 PHP 脚本，它可以每隔一段时间 ping AWS 一次以获取上传进度。我正在查看 API，看看他们是否支持类似的东西，但 atm 没有运气。有什么事请告诉我...

进一步编辑：闪存是唯一的方法吗？

谢谢，

Answer 1

是的，在 AWS PHP SDK v3 中是可能的。

$client = new S3Client(/* config */);

$result = $client->putObject([
    'Bucket'     => 'bucket-name',
    'Key'        => 'bucket-name/file.ext',
    'SourceFile' => 'local-file.ext',
    'ContentType' => 'application/pdf',
    '@http' => [
        'progress' => function ($downloadTotalSize, $downloadSizeSoFar, $uploadTotalSize, $uploadSizeSoFar) {
            printf(
                "%s of %s downloaded, %s of %s uploaded.\n",
                $downloadSizeSoFar,
                $downloadTotalSize,
                $uploadSizeSoFar,
                $uploadTotalSize
            );
        }
    ]
]);

这在 AWS 文档 - S3 Config section 中有说明。它通过暴露 GuzzleHttp 的 progress property-callable 来工作，如 this SO answer 中所述。

Answer 2

经过大量搜索，我发现这个问题的简单答案是否定的。

基本上是最好的方法，正如我从亚马逊自己的编码（他们在 AWS S3 控制台上的小上传小部件）中发现的那样，只有通过首先发送到 PHP 可以读取的另一台服务器才能真正获得上传进度了解进度信息。

这将使用您自己的应用服务器 /tmp 目录作为垫脚石创建“直通”策略。这似乎是首选方法。

Answer 3

AWS PHP SDK 有一个代码示例，它们在上传到 S3 时显示上传进度。我不确定它是否对小文件有效，但对于流式传输它确实有效。

您可以查看更多信息 - http://aws.amazon.com/sdkforphp/

在某种程度上，如果他们正在显示进度 - 我们当然可以在 jquery 等 Javascript 框架的帮助下以进度条的形式获得它。

我很快就会着手处理它，并且一定会发布一个教程。干杯！

Answer 4

是的，您可以通过分段上传：http://docs.aws.amazon.com/AmazonS3/latest/dev/UsingMPphpAPI.html

分段上传是一个三步过程：启动上传，上传对象分段，上传完所有分段后，完成分段上传。收到完整的分段上传请求后，Amazon S3 会根据上传的部分构造对象，然后您可以像访问存储桶中的任何其他对象一样访问该对象。

http://docs.aws.amazon.com/AmazonS3/latest/dev/mpuoverview.html

我将很快亲自执行此操作，但这是您需要开始的。

Answer 5

是的，你可以通过像这样修改 s3.php 来做到这一点，

<?php
class S3Withprogressbar {
// ACL flags
const ACL_PRIVATE = 'private';
const ACL_PUBLIC_READ = 'public-read';
const ACL_PUBLIC_READ_WRITE = 'public-read-write';
private static $__accessKey; // AWS Access key
private static $__secretKey; // AWS Secret key
public static $_uploadProgressFileName="" ;//uploadProgressFileName
public function __construct($accessKey = null, $secretKey = null) {
if ($accessKey !== null && $secretKey !== null)
self::setAuth($accessKey, $secretKey);
}
public static function setAuth($accessKey, $secretKey) {
self::$__accessKey = $accessKey;
self::$__secretKey = $secretKey;
}
public static function listBuckets($detailed = false) {
$rest = new S3Request('GET', '', '');
$rest = $rest->getResponse();
if ($rest->error === false && $rest->code !== 200)
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
if ($rest->error !== false) {
trigger_error(sprintf("S3Withprogressbar::listBuckets(): [%s] %s", $rest->error['code'], $rest->error['message']), E_USER_WARNING);
return false;
}
$results = array(); //var_dump($rest->body);
if (!isset($rest->body->Buckets)) return $results;
if ($detailed) {
if (isset($rest->body->Owner, $rest->body->Owner->ID, $rest->body->Owner->DisplayName))
$results['owner'] = array(
'id' => (string)$rest->body->Owner->ID, 'name' => (string)$rest->body->Owner->ID
);
$results['buckets'] = array();
foreach ($rest->body->Buckets->Bucket as $b)
$results['buckets'][] = array(
'name' => (string)$b->Name, 'time' => strtotime((string)$b->CreationDate)
);
} else
foreach ($rest->body->Buckets->Bucket as $b) $results[] = (string)$b->Name;
return $results;
}
public static function getBucket($bucket, $prefix = null, $marker = null, $maxKeys = null) {
$rest = new S3Request('GET', $bucket, '');
if ($prefix !== null && $prefix !== '') $rest->setParameter('prefix', $prefix);
if ($marker !== null && $prefix !== '') $rest->setParameter('marker', $marker);
if ($maxKeys !== null && $prefix !== '') $rest->setParameter('max-keys', $maxKeys);
$response = $rest->getResponse();
if ($response->error === false && $response->code !== 200)
$response->error = array('code' => $response->code, 'message' => 'Unexpected HTTP status');
if ($response->error !== false) {
trigger_error(sprintf("S3Withprogressbar::getBucket(): [%s] %s", $response->error['code'], $response->error['message']), E_USER_WARNING);
return false;
}
$results = array();
$lastMarker = null;
if (isset($response->body, $response->body->Contents))
foreach ($response->body->Contents as $c) {
$results[(string)$c->Key] = array(
'name' => (string)$c->Key,
'time' => strToTime((string)$c->LastModified),
'size' => (int)$c->Size,
'hash' => substr((string)$c->ETag, 1, -1)
);
$lastMarker = (string)$c->Key;
//$response->body->IsTruncated = 'true'; break;
}
if (isset($response->body->IsTruncated) &&
(string)$response->body->IsTruncated == 'false') return $results;
// Loop through truncated results if maxKeys isn't specified
if ($maxKeys == null && $lastMarker !== null && (string)$response->body->IsTruncated == 'true')
do {
$rest = new S3Request('GET', $bucket, '');
if ($prefix !== null) $rest->setParameter('prefix', $prefix);
$rest->setParameter('marker', $lastMarker);
if (($response = $rest->getResponse(true)) == false || $response->code !== 200) break;
if (isset($response->body, $response->body->Contents))
foreach ($response->body->Contents as $c) {
$results[(string)$c->Key] = array(
'name' => (string)$c->Key,
'time' => strToTime((string)$c->LastModified),
'size' => (int)$c->Size,
'hash' => substr((string)$c->ETag, 1, -1)
);
$lastMarker = (string)$c->Key;
}
} while ($response !== false && (string)$response->body->IsTruncated == 'true');
return $results;
}
public function putBucket($bucket, $acl = self::ACL_PRIVATE) {
$rest = new S3Request('PUT', $bucket, '');
$rest->setAmzHeader('x-amz-acl', $acl);
$rest = $rest->getResponse();
if ($rest->error === false && $rest->code !== 200)
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
if ($rest->error !== false) {
//trigger_error(sprintf("S3Withprogressbar::putBucket({$bucket}): [%s] %s", $rest->error['code'], $rest->error['message']), E_USER_WARNING);
return false;
}
return true;
}
public function deleteBucket($bucket = '') {
$rest = new S3Request('DELETE', $bucket);
$rest = $rest->getResponse();
if ($rest->error === false && $rest->code !== 204)
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
if ($rest->error !== false) {
trigger_error(sprintf("S3Withprogressbar::deleteBucket({$bucket}): [%s] %s",
$rest->error['code'], $rest->error['message']), E_USER_WARNING);
return false;
}
return true;
}
public static function inputFile($file, $md5sum = true) {
if (!file_exists($file) || !is_file($file) || !is_readable($file)) {
trigger_error('S3Withprogressbar::inputFile(): Unable to open input file: '.$file, E_USER_WARNING);
return false;
}
return array('file' => $file, 'size' => filesize($file),
'md5sum' => $md5sum !== false ? (is_string($md5sum) ? $md5sum :
base64_encode(md5_file($file, true))) : '');
}
public static function inputResource(&$resource, $bufferSize, $md5sum = '') {
if (!is_resource($resource) || $bufferSize <= 0) {
trigger_error('S3Withprogressbar::inputResource(): Invalid resource or buffer size', E_USER_WARNING);
return false;
}
$input = array('size' => $bufferSize, 'md5sum' => $md5sum);
$input['fp'] =& $resource;
return $input;
}
// Modified Function with one more  parameter $uploadProgressFileName
public static function putObject($input, $bucket, $uri, $acl = self::ACL_PRIVATE, $metaHeaders = array(), $contentType = null,$uploadProgressFileName) {
if ($input == false) return false;
$rest = new S3Request('PUT', $bucket, $uri);
// Set public variable value($uploadProgressFileName) in S3Request class  
$rest->uploadProgressFileName = $uploadProgressFileName;
if (is_string($input)) $input = array(
'data' => $input, 'size' => strlen($input),
'md5sum' => base64_encode(md5($input, true))
);
// Data
if (isset($input['fp']))
$rest->fp =& $input['fp'];
elseif (isset($input['file']))
$rest->fp = @fopen($input['file'], 'rb');
elseif (isset($input['data']))
$rest->data = $input['data'];
// Content-Length (required)
if (isset($input['size']) && $input['size'] > 0)
$rest->size = $input['size'];
else {
if (isset($input['file']))
$rest->size = filesize($input['file']);
elseif (isset($input['data']))
$rest->size = strlen($input['data']);
}
// Content-Type
if ($contentType !== null)
$input['type'] = $contentType;
elseif (!isset($input['type']) && isset($input['file']))
$input['type'] = self::__getMimeType($input['file']);
else
$input['type'] = 'application/octet-stream';
// We need to post with the content-length and content-type, MD5 is optional
if ($rest->size > 0 && ($rest->fp !== false || $rest->data !== false)) {
$rest->setHeader('Content-Type', $input['type']);
if (isset($input['md5sum'])) $rest->setHeader('Content-MD5', $input['md5sum']);
$rest->setAmzHeader('x-amz-acl', $acl);
foreach ($metaHeaders as $h => $v) $rest->setAmzHeader('x-amz-meta-'.$h, $v);
$rest->getResponse();
} else
$rest->response->error = array('code' => 0, 'message' => 'Missing input parameters');
if ($rest->response->error === false && $rest->response->code !== 200)
$rest->response->error = array('code' => $rest->response->code, 'message' => 'Unexpected HTTP status');
if ($rest->response->error !== false) {
//trigger_error(sprintf("S3Withprogressbar::putObject(): [%s] %s", $rest->response->error['code'], $rest->response->error['message']), E_USER_WARNING);
return false;
}
return true;
}
// Modified Function with one more  parameter $uploadProgressFileName
public static function putObjectFile($file, $bucket, $uri, $acl = self::ACL_PRIVATE, $metaHeaders = array(), $contentType = null,$uploadProgressFileName) {
return self::putObject(S3Withprogressbar::inputFile($file), $bucket, $uri, $acl, $metaHeaders, $contentType,$uploadProgressFileName);
}
public function putObjectString($string, $bucket, $uri, $acl = self::ACL_PRIVATE, $metaHeaders = array(), $contentType = 'text/plain') {
return self::putObject($string, $bucket, $uri, $acl, $metaHeaders, $contentType);
}
public static function getObject($bucket = '', $uri = '', $saveTo = false) {
$rest = new S3Request('GET', $bucket, $uri);
if ($saveTo !== false) {
if (is_resource($saveTo))
$rest->fp =& $saveTo;
else
if (($rest->fp = @fopen($saveTo, 'wb')) == false)
$rest->response->error = array('code' => 0, 'message' => 'Unable to open save file for writing: '.$saveTo);
}
if ($rest->response->error === false) $rest->getResponse();
if ($rest->response->error === false && $rest->response->code !== 200)
$rest->response->error = array('code' => $rest->response->code, 'message' => 'Unexpected HTTP status');
if ($rest->response->error !== false) {
trigger_error(sprintf("S3Withprogressbar::getObject({$bucket}, {$uri}): [%s] %s",
$rest->response->error['code'], $rest->response->error['message']), E_USER_WARNING);
return false;
}
$rest->file = realpath($saveTo);
return $rest->response;
}
public static function getObjectInfo($bucket = '', $uri = '', $returnInfo = true) {
$rest = new S3Request('HEAD', $bucket, $uri);
$rest = $rest->getResponse();
if ($rest->error === false && ($rest->code !== 200 && $rest->code !== 404))
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
if ($rest->error !== false) {
trigger_error(sprintf("S3Withprogressbar::getObjectInfo({$bucket}, {$uri}): [%s] %s",
$rest->error['code'], $rest->error['message']), E_USER_WARNING);
return false;
}
return $rest->code == 200 ? $returnInfo ? $rest->headers : true : false;
}
public static function setBucketLogging($bucket, $targetBucket, $targetPrefix) {
$dom = new DOMDocument;
$bucketLoggingStatus = $dom->createElement('BucketLoggingStatus');
$bucketLoggingStatus->setAttribute('xmlns', 'http://s3.amazonaws.com/doc/2006-03-01/');
$loggingEnabled = $dom->createElement('LoggingEnabled');
$loggingEnabled->appendChild($dom->createElement('TargetBucket', $targetBucket));
$loggingEnabled->appendChild($dom->createElement('TargetPrefix', $targetPrefix));
// TODO: Add TargetGrants
$bucketLoggingStatus->appendChild($loggingEnabled);
$dom->appendChild($bucketLoggingStatus);
$rest = new S3Request('PUT', $bucket, '');
$rest->setParameter('logging', null);
$rest->data = $dom->saveXML();
$rest->size = strlen($rest->data);
$rest->setHeader('Content-Type', 'application/xml');
$rest = $rest->getResponse();
if ($rest->error === false && $rest->code !== 200)
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
if ($rest->error !== false) {
trigger_error(sprintf("S3Withprogressbar::setBucketLogging({$bucket}, {$uri}): [%s] %s",
$rest->error['code'], $rest->error['message']), E_USER_WARNING);
return false;
}
return true;
}
public static function getBucketLogging($bucket = '') {
$rest = new S3Request('GET', $bucket, '');
$rest->setParameter('logging', null);
$rest = $rest->getResponse();
if ($rest->error === false && $rest->code !== 200)
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
if ($rest->error !== false) {
trigger_error(sprintf("S3Withprogressbar::getBucketLogging({$bucket}): [%s] %s",
$rest->error['code'], $rest->error['message']), E_USER_WARNING);
return false;
}
if (!isset($rest->body->LoggingEnabled)) return false; // No logging
return array(
'targetBucket' => (string)$rest->body->LoggingEnabled->TargetBucket,
'targetPrefix' => (string)$rest->body->LoggingEnabled->TargetPrefix,
);
}
public static function setAccessControlPolicy($bucket, $uri = '', $acp = array()) {
$dom = new DOMDocument;
$dom->formatOutput = true;
$accessControlPolicy = $dom->createElement('AccessControlPolicy');
$accessControlList = $dom->createElement('AccessControlList');
// It seems the owner has to be passed along too
$owner = $dom->createElement('Owner');
$owner->appendChild($dom->createElement('ID', $acp['owner']['id']));
$owner->appendChild($dom->createElement('DisplayName', $acp['owner']['name']));
$accessControlPolicy->appendChild($owner);
foreach ($acp['acl'] as $g) {
$grant = $dom->createElement('Grant');
$grantee = $dom->createElement('Grantee');
$grantee->setAttribute('xmlns:xsi', 'http://www.w3.org/2001/XMLSchema-instance');
if (isset($g['id'])) { // CanonicalUser (DisplayName is omitted)
$grantee->setAttribute('xsi:type', 'CanonicalUser');
$grantee->appendChild($dom->createElement('ID', $g['id']));
} elseif (isset($g['email'])) { // AmazonCustomerByEmail
$grantee->setAttribute('xsi:type', 'AmazonCustomerByEmail');
$grantee->appendChild($dom->createElement('EmailAddress', $g['email']));
} elseif ($g['type'] == 'Group') { // Group
$grantee->setAttribute('xsi:type', 'Group');
$grantee->appendChild($dom->createElement('URI', $g['uri']));
}
$grant->appendChild($grantee);
$grant->appendChild($dom->createElement('Permission', $g['permission']));
$accessControlList->appendChild($grant);
}
$accessControlPolicy->appendChild($accessControlList);
$dom->appendChild($accessControlPolicy);
$rest = new S3Request('PUT', $bucket, '');
$rest->setParameter('acl', null);
$rest->data = $dom->saveXML();
$rest->size = strlen($rest->data);
$rest->setHeader('Content-Type', 'application/xml');
$rest = $rest->getResponse();
if ($rest->error === false && $rest->code !== 200)
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
if ($rest->error !== false) {
trigger_error(sprintf("S3Withprogressbar::setAccessControlPolicy({$bucket}, {$uri}): [%s] %s",
$rest->error['code'], $rest->error['message']), E_USER_WARNING);
return false;
}
return true;
}
public static function getAccessControlPolicy($bucket, $uri = '') {
$rest = new S3Request('GET', $bucket, $uri);
$rest->setParameter('acl', null);
$rest = $rest->getResponse();
if ($rest->error === false && $rest->code !== 200)
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
if ($rest->error !== false) {
trigger_error(sprintf("S3Withprogressbar::getAccessControlPolicy({$bucket}, {$uri}): [%s] %s",
$rest->error['code'], $rest->error['message']), E_USER_WARNING);
return false;
}
$acp = array();
if (isset($rest->body->Owner, $rest->body->Owner->ID, $rest->body->Owner->DisplayName)) {
$acp['owner'] = array(
'id' => (string)$rest->body->Owner->ID, 'name' => (string)$rest->body->Owner->DisplayName
);
}
if (isset($rest->body->AccessControlList)) {
$acp['acl'] = array();
foreach ($rest->body->AccessControlList->Grant as $grant) {
foreach ($grant->Grantee as $grantee) {
if (isset($grantee->ID, $grantee->DisplayName)) // CanonicalUser
$acp['acl'][] = array(
'type' => 'CanonicalUser',
'id' => (string)$grantee->ID,
'name' => (string)$grantee->DisplayName,
'permission' => (string)$grant->Permission
);
elseif (isset($grantee->EmailAddress)) // AmazonCustomerByEmail
$acp['acl'][] = array(
'type' => 'AmazonCustomerByEmail',
'email' => (string)$grantee->EmailAddress,
'permission' => (string)$grant->Permission
);
elseif (isset($grantee->URI)) // Group
$acp['acl'][] = array(
'type' => 'Group',
'uri' => (string)$grantee->URI,
'permission' => (string)$grant->Permission
);
else continue;
}
}
}
return $acp;
}
public static function deleteObject($bucket = '', $uri = '') {
$rest = new S3Request('DELETE', $bucket, $uri);
$rest = $rest->getResponse();
if ($rest->error === false && $rest->code !== 204)
$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
if ($rest->error !== false) {
trigger_error(sprintf("S3Withprogressbar::deleteObject(): [%s] %s", $rest->error['code'], $rest->error['message']), E_USER_WARNING);
return false;
}
return true;
}
public static function __getMimeType(&$file) {
$type = false;
// Fileinfo documentation says fileinfo_open() will use the
// MAGIC env var for the magic file
if (extension_loaded('fileinfo') && isset($_ENV['MAGIC']) &&
($finfo = finfo_open(FILEINFO_MIME, $_ENV['MAGIC'])) !== false) {
if (($type = finfo_file($finfo, $file)) !== false) {
// Remove the charset and grab the last content-type
$type = explode(' ', str_replace('; charset=', ';charset=', $type));
$type = array_pop($type);
$type = explode(';', $type);
$type = array_shift($type);
}
finfo_close($finfo);
// If anyone is still using mime_content_type()
} elseif (function_exists('mime_content_type'))
$type = mime_content_type($file);
if ($type !== false && strlen($type) > 0) return $type;
// Otherwise do it the old fashioned way
static $exts = array(
'jpg' => 'image/jpeg', 'gif' => 'image/gif', 'png' => 'image/png',
'tif' => 'image/tiff', 'tiff' => 'image/tiff', 'ico' => 'image/x-icon',
'swf' => 'application/x-shockwave-flash', 'pdf' => 'application/pdf',
'zip' => 'application/zip', 'gz' => 'application/x-gzip',
'tar' => 'application/x-tar', 'bz' => 'application/x-bzip',
'bz2' => 'application/x-bzip2', 'txt' => 'text/plain',
'asc' => 'text/plain', 'htm' => 'text/html', 'html' => 'text/html',
'xml' => 'text/xml', 'xsl' => 'application/xsl+xml',
'ogg' => 'application/ogg', 'mp3' => 'audio/mpeg', 'wav' => 'audio/x-wav',
'avi' => 'video/x-msvideo', 'mpg' => 'video/mpeg', 'mpeg' => 'video/mpeg',
'mov' => 'video/quicktime', 'flv' => 'video/x-flv', 'php' => 'text/x-php'
);
$ext = strToLower(pathInfo($file, PATHINFO_EXTENSION));
return isset($exts[$ext]) ? $exts[$ext] : 'application/octet-stream';
}
public static function __getSignature($string) {
return 'AWS '.self::$__accessKey.':'.base64_encode(extension_loaded('hash') ?
hash_hmac('sha1', $string, self::$__secretKey, true) : pack('H*', sha1(
(str_pad(self::$__secretKey, 64, chr(0x00)) ^ (str_repeat(chr(0x5c), 64))) .
pack('H*', sha1((str_pad(self::$__secretKey, 64, chr(0x00)) ^
(str_repeat(chr(0x36), 64))) . $string)))));
}
}
final class S3Request {
private $verb, $bucket, $uri, $resource = '', $parameters = array(),
$amzHeaders = array(), $headers = array(
'Host' => '', 'Date' => '', 'Content-MD5' => '', 'Content-Type' => ''
);
public $fp = false, $size = 0, $data = false, $response;
public $uploadProgressFileName;
function __construct($verb, $bucket = '', $uri = '') {
$this->verb = $verb;
$this->bucket = strtolower($bucket);
$this->uri = $uri !== '' ? '/'.$uri : '/';
if ($this->bucket !== '') {
$this->bucket = explode('/', $this->bucket);
$this->resource = '/'.$this->bucket[0].$this->uri;
$this->headers['Host'] = $this->bucket[0].'.s3.amazonaws.com';
$this->bucket = implode('/', $this->bucket);
} else {
$this->headers['Host'] = 's3.amazonaws.com';
if (strlen($this->uri) > 1)
$this->resource = '/'.$this->bucket.$this->uri;
else $this->resource = $this->uri;
}
$this->headers['Date'] = gmdate('D, d M Y H:i:s T');
$this->response = new STDClass;
$this->response->error = false;
$this->response->body  = false; 
$CI =& get_instance();
$CI->load->helper('file');
}
public function setParameter($key, $value) {
$this->parameters[$key] = $value;
}
public function setHeader($key, $value) {
$this->headers[$key] = $value;
}
public function setAmzHeader($key, $value) {
$this->amzHeaders[$key] = $value;
}
//:callback function for upload progress.
public function progressCallback_new_curl($new,$download_size, $downloaded_size, $upload_size, $uploaded_size )
{
ob_start();
static $previousProgress = 0;
if ( $upload_size == 0 )
$progress = 0;
else
$progress = round( $uploaded_size * 100 / $upload_size );
if ( $progress > $previousProgress)
{
flush();
$previousProgress = $progress;
$new_file_path = FCPATH.'upload/'.$this->uploadProgressFileName.'.txt'; // modify this line to point to the actual location of the file
write_file($new_file_path, $progress."\n");
// Check for Cancel upload text file and if exists return 1 to interrupt curl upload process.
$cancel_path=FCPATH.'upload/cancel_'.$this->uploadProgressFileName.'.txt';
if(file_exists($cancel_path)){
unlink($cancel_path);
if(file_exists($new_file_path)){
unlink($new_file_path);
}
return 1;
}
}        
ob_flush();
flush();                         
}
public function progressCallback_old_curl($download_size, $downloaded_size, $upload_size, $uploaded_size )
{
ob_start();
static $previousProgress = 0;
if ( $upload_size == 0 )
$progress = 0;
else
$progress = round( $uploaded_size * 100 / $upload_size );
if ( $progress > $previousProgress)
{
flush();
$previousProgress = $progress;
$new_file_path = FCPATH.'upload/'.$this->uploadProgressFileName.'.txt'; // modify this line to point to the actual location of the file
write_file($new_file_path, $progress."\n");
// Check for Cancel upload text file and if exists return 1 to interrupt curl upload process.
$cancel_path=FCPATH.'upload/cancel_'.$this->uploadProgressFileName.'.txt';
if(file_exists($cancel_path)){
unlink($cancel_path);
if(file_exists($new_file_path)){
unlink($new_file_path);
}
return 1;
}  
}
ob_flush();
flush(); 
}
public function getResponse() {
$query = '';
if (sizeof($this->parameters) > 0) {
$query = substr($this->uri, -1) !== '?' ? '?' : '&';
foreach ($this->parameters as $var => $value)
if ($value == null || $value == '') $query .= $var.'&';
else $query .= $var.'='.$value.'&';
$query = substr($query, 0, -1);
$this->uri .= $query;
if (isset($this->parameters['acl']) || !isset($this->parameters['logging']))
$this->resource .= $query;
}
$url = (extension_loaded('openssl')?'https://':'http://').$this->headers['Host'].$this->uri;
//var_dump($this->bucket, $this->uri, $this->resource, $url);
// Basic setup
$curl = curl_init();
curl_setopt($curl, CURLOPT_USERAGENT, 'S3/php');
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($curl, CURLOPT_URL, $url);
//:callback function call for upload progress.
curl_setopt($curl, CURLOPT_NOPROGRESS, false);
if (!defined('PHP_VERSION_ID') || PHP_VERSION_ID < 50500) {
curl_setopt($curl, CURLOPT_PROGRESSFUNCTION,  array($this, 'progressCallback_old_curl'));
} else {
curl_setopt($curl, CURLOPT_PROGRESSFUNCTION,  array($this, 'progressCallback_new_curl'));
}
// Headers
$headers = array(); $amz = array();
foreach ($this->amzHeaders as $header => $value)
if (strlen($value) > 0) $headers[] = $header.': '.$value;
foreach ($this->headers as $header => $value)
if (strlen($value) > 0) $headers[] = $header.': '.$value;
foreach ($this->amzHeaders as $header => $value)
if (strlen($value) > 0) $amz[] = strToLower($header).':'.$value;
$amz = (sizeof($amz) > 0) ? "\n".implode("\n", $amz) : '';
// Authorization string
$headers[] = 'Authorization: ' . S3Withprogressbar::__getSignature(
$this->verb."\n".
$this->headers['Content-MD5']."\n".
$this->headers['Content-Type']."\n".
$this->headers['Date'].$amz."\n".$this->resource
);
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, false);
curl_setopt($curl, CURLOPT_WRITEFUNCTION, array(&$this, '__responseWriteCallback'));
curl_setopt($curl, CURLOPT_HEADERFUNCTION, array(&$this, '__responseHeaderCallback'));
// Request types
switch ($this->verb) {
case 'GET': break;
case 'PUT':
if ($this->fp !== false) {
curl_setopt($curl, CURLOPT_PUT, true);
curl_setopt($curl, CURLOPT_INFILE, $this->fp);
if ($this->size > 0)
curl_setopt($curl, CURLOPT_INFILESIZE, $this->size);
} elseif ($this->data !== false) {
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'PUT');
curl_setopt($curl, CURLOPT_POSTFIELDS, $this->data);
if ($this->size > 0)
curl_setopt($curl, CURLOPT_BUFFERSIZE, $this->size);
} else
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'PUT');
break;
case 'HEAD':
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'HEAD');
curl_setopt($curl, CURLOPT_NOBODY, true);
break;
case 'DELETE':
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'DELETE');
break;
default: break;
}
// Execute, grab errors
if (curl_exec($curl))
$this->response->code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
else
$this->response->error = array(
'code' => curl_errno($curl),
'message' => curl_error($curl),
'resource' => $this->resource
);
@curl_close($curl);
// Parse body into XML
if ($this->response->error === false && isset($this->response->headers['type']) &&
$this->response->headers['type'] == 'application/xml' && isset($this->response->body)) {
$this->response->body = simplexml_load_string($this->response->body);
// Grab S3 errors
if (!in_array($this->response->code, array(200, 204)) &&
isset($this->response->body->Code, $this->response->body->Message)) {
$this->response->error = array(
'code' => (string)$this->response->body->Code,
'message' => (string)$this->response->body->Message
);
if (isset($this->response->body->Resource))
$this->response->error['resource'] = (string)$this->response->body->Resource;
unset($this->response->body);
}
}
// Clean up file resources
if ($this->fp !== false && is_resource($this->fp)) fclose($this->fp);
return $this->response;
}
private function __responseWriteCallback(&$curl, &$data) {
if ($this->response->code == 200 && $this->fp !== false)
return fwrite($this->fp, $data);
else
$this->response->body .= $data;
return strlen($data);
}
private function __responseHeaderCallback(&$curl, &$data) {
if (($strlen = strlen($data)) <= 2) return $strlen;
if (substr($data, 0, 4) == 'HTTP')
$this->response->code = (int)substr($data, 9, 3);
else {
list($header, $value) = explode(': ', trim($data));
if ($header == 'Last-Modified')
$this->response->headers['time'] = strtotime($value);
elseif ($header == 'Content-Length')
$this->response->headers['size'] = (int)$value;
elseif ($header == 'Content-Type')
$this->response->headers['type'] = $value;
elseif ($header == 'ETag')
$this->response->headers['hash'] = substr($value, 1, -1);
elseif (preg_match('/^x-amz-meta-.*$/', $header))
$this->response->headers[$header] = is_numeric($value) ? (int)$value : $value;
}
return $strlen;
}
}
?>