PHP整合七牛实现上传文件

七牛支持抓取远程图片 API，用 access_key + secret_key + url 生成 access_token, 把 access_token 加在 header 里，然后向 post url 就完成上传了。

Sample code:

<?php
/*
 *
 * @desc URL安全形式的base64编码
 * @param string $str
 * @return string
 */ 

function urlsafe_base64_encode($str){
  $find = array("+","/");
  $replace = array("-", "_");
  return str_replace($find, $replace, base64_encode($str));
} 

/**
 * generate_access_token
 *
 * @desc 签名运算
 * @param string $access_key
 * @param string $secret_key
 * @param string $url
 * @param array $params
 * @return string
 */
function generate_access_token($access_key, $secret_key, $url, $params = ''){
  $parsed_url = parse_url($url);
  $path = $parsed_url['path'];
  $access = $path;
  if (isset($parsed_url['query'])) {
    $access .= "?" . $parsed_url['query'];
  }
  $access .= "\n";
  if($params){
    if (is_array($params)){
      $params = http_build_query($params);
    }
    $access .= $params;
  }
  $digest = hash_hmac('sha1', $access, $secret_key, true);
  return $access_key.':'.urlsafe_base64_encode($digest);
} 

/**
 * 测试
 */ 

$access_key = '''your access_key';
$secret_key = 'your secret_key'; 

$fetch = urlsafe_base64_encode('http://203.208.46.200/images/srpr/logo11w.png');
$to = urlsafe_base64_encode('ibeircn:11.jpg'); 

$url = 'http://iovip.qbox.me/fetch/'. $fetch .'/to/' . $to; 

$access_token = generate_access_token($access_key, $secret_key, $url); 

$header[] = 'Content-Type: application/json';
$header[] = 'Authorization: QBox '. $access_token; 

$con = send('iovip.qbox.me/fetch/'.$fetch.'/to/'.$to, $header);
var_dump($con); 

function send($url, $header = '') {
  $curl = curl_init($url);
  curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($curl, CURLOPT_HEADER,1);
  curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
  curl_setopt($curl, CURLOPT_POST, 1); 

  $con = curl_exec($curl); 

  if ($con === false) {
    echo 'CURL ERROR: ' . curl_error($curl);
  } else {
    return $con;
  }
}
?>

以上所述就是本文的全部内容了，希望大家能够喜欢。