阿里云OSS轻量级Driver

不用加载官方那一大坨sdk了，简单一点
看过网上的一些例子都过于复杂，包含了官方的phpsdk那一大坨东西，理论上我只需要简单的上传文件而已，不需要那么多东西，于是自己写了一下。

以下代码保存到/yourpath/ThinkPHP/Library/Think/Upload/Driver/Oss.class.php即可
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: 废墟
// +----------------------------------------------------------------------

namespace Think\Upload\Driver;

class Oss {

const OSS_HOST = 'oss.aliyuncs.com';

/**
* 上传文件根目录
* @var string
*/
private $rootPath;

/**
* 上传错误信息
* @var string
*/
private $error = '';
private $config = array(
'access_id' => '', //阿里云Access Key ID
'access_key' => '', //阿里云Access Key Secret
'bucket' => '', //空间名称
'timeout' => 90, //超时时间
);

/**
* 构造函数，用于设置上传根路径
* @param array $config FTP配置
*/
public function __construct($config) {
/* 默认FTP配置 */
$this->config = array_merge($this->config, $config);
}

/**
* 检测上传根目录(阿里云上传时支持自动创建目录，直接返回)
* @param string $rootpath 根目录
* @return boolean true-检测通过，false-检测失败
*/
public function checkRootPath($rootpath) {
/* 设置根目录 */
$this->rootPath = trim($rootpath, './') . '/';
return true;
}

/**
* 检测上传目录(阿里云上传时支持自动创建目录，直接返回)
* @param string $savepath 上传目录
* @return boolean 检测结果，true-通过，false-失败
*/
public function checkSavePath($savepath) {
return true;
}

/**
* 创建文件夹 (阿里云上传时支持自动创建目录，直接返回)
* @param string $savepath 目录名称
* @return boolean true-创建成功，false-创建失败
*/
public function mkdir($savepath) {
return true;
}

/**
* 保存指定文件
* @param array $file 保存的文件信息
* @param boolean $replace 同名文件是否覆盖
* @return boolean 保存状态，true-成功，false-失败
*/
public function save($file, $replace = true) {
$_headers = array('Content-Type: ' . $file['type']);
$resource = fopen($file['tmp_name'], 'r');

$path = $this->rootPath . $file['savepath'] . $file['savename'];

$uri = "/{$this->config['bucket']}{$path}";
$ch = curl_init('http://' . self::OSS_HOST . $uri);

$date = gmdate('D, d M Y H:i:s \G\M\T');

array_push($_headers, "Date: {$date}");

$sign_string = "PUT\n\n" . $file['type'] . "\n" . $date . "\n" . $uri;
$sign = $this->hex_to_base64(hash_hmac('sha1', $sign_string, $this->config['access_key']));

array_push($_headers, 'Authorization: OSS ' . $this->config['access_id'] . ':' . $sign);

fseek($resource, 0, SEEK_END);
$length = ftell($resource);
fseek($resource, 0);

array_push($_headers, "Content-Length: {$length}");

curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_INFILE, $resource);
curl_setopt($ch, CURLOPT_INFILESIZE, $length);
curl_setopt($ch, CURLOPT_HTTPHEADER, $_headers);
curl_setopt($ch, CURLOPT_TIMEOUT, $this->config['timeout']);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 0);
$response = curl_exec($ch);
$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
fclose($resource);
if ($status == 200) {
return true;
} else {
$this->error = $response;
return false;
}
}

/**
* 获取最后一次上传错误信息
* @return string 错误信息
*/
public function getError() {
return $this->error;
}


private function hex_to_base64($str) {
$result = '';

for ($i = 0; $i $result .= chr(hexdec(substr($str, $i, 2)));
}

return base64_encode($result);
}

}使用方法也比较简单，如果只有一个bucket则可以把配置写入config.php里，内容如下'FILE_UPLOAD_TYPE' => 'Oss',
'UPLOAD_TYPE_CONFIG' => array(
'access_id' => 'access_id', //阿里云Access Key ID
'access_key' => 'access_key', //阿里云Access Key Secret
'bucket' => 'bucket' //阿里云的bucket
),如果你需要将不同的文件存入不同的bucket则需要在上传方法中采用动态配置$config = array(
'maxSize' => 0,
'exts' => array('jpg', 'jpeg', 'png'),
'saveName' => array('uniq_photo_name', '__FILE__'),
'rootPath' => '/',
);
$oss_config = array(
'access_id' => 'access_id', //阿里云Access Key ID
'access_key' => 'access_key', //阿里云Access Key Secret
'bucket' => 'bucket'
);
$upload = new \Think\Upload($config, 'Oss', $oss_config);

AD：真正免费，域名+虚机+企业邮箱=0元