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AWS S3下載計數器

2014-02-21 109 views
0

我有一個上傳到AWS s3存儲桶的文件，並將該文件設置爲公開許可。我想在我的Facebook分享該文件..事情是我可以複製該公共鏈接並分享它。但我也希望下載的數量存儲..以其他方式，我想在我的網站託管一個PHP文件，其中將有一個標籤類似欄中的文件名，文件大小，下載鏈接和總下載次數將在那裏 。請幫我用代碼AWS S3下載計數器

我嘗試下面的代碼，我從谷歌得到了搜索，但沒有用

<?php 


$aws_key = '_YOUR_AWS_KEY_000000'; 
$aws_secret = '_your_aws_secret_00000000000000000000000'; 

$aws_bucket = 'anyexample-test'; // AWS bucket 
$aws_object = 'test.png';  // AWS object name (file name) 

if (strlen($aws_secret) != 40) die("$aws_secret should be exactly 40 bytes long"); 



$dt = gmdate('r'); // GMT based timestamp 

// preparing string to sign 
$string2sign = "GET 


{$dt} 
/{$aws_bucket}/{$aws_object}"; 


// preparing HTTP query 
$query = "GET /{$aws_bucket}/{$aws_object} HTTP/1.1 
Host: s3.amazonaws.com 
Connection: close 
Date: {$dt} 
Authorization: AWS {$aws_key}:".amazon_hmac($string2sign)."\n\n"; 

echo "Downloading: http://s3.amazonaws.com/{$aws_bucket}/{$aws_object}\n"; 
list($header, $resp) = downloadREST($fp, $query); 
echo "\n\n"; 

if (strpos($header, '200 OK') === false) // checking for error 
    die($header."\r\n\r\n".$resp); 

$aws_object_fs = str_replace('/', '_', $aws_object); 
// AWS object may contain slashes. We're replacing them with underscores 

@$fh = fopen($aws_object_fs, 'wb'); 
if ($fh == false) 
    die("Can't open file {$aws_object_fs} for writing. Fatal error!\n"); 

echo "Saving data to {$aws_object_fs}...\n"; 
fwrite($fh, $resp); 
fclose($fh); 


// Sending HTTP query, without keep-alive support 
function downloadREST($fp, $q) 
{ 
    // opening HTTP connection to Amazon S3 
    // since there is no keep-alive we open new connection for each request 
    $fp = fsockopen("s3.amazonaws.com", 80, $errno, $errstr, 30); 

    if (!$fp) die("$errstr ($errno)\n"); // connection failed, pity 

    fwrite($fp, $q); // sending query 
    $r = ''; // buffer for result 
    $check_header = true; // header check flag 
    $header_end = 0; 
    while (!feof($fp)) { 
     $r .= fgets($fp, 256); // reading response 

     if ($check_header) // checking for header 
     { 
      $header_end = strpos($r, "\r\n\r\n"); // this is HTTP header boundary 
      if ($header_end !== false) 
       $check_header = false; // We've found it, no more checking 
     } 
    } 

    fclose($fp); 

    $header_boundary = $header_end+4; // 4 is length of "\r\n\r\n" 
    return array(substr($r, 0, $header_boundary), substr($r, $header_boundary)); 
} 


// hmac-sha1 code START 
// hmac-sha1 function: assuming key is global $aws_secret 40 bytes long 
// http://en.wikipedia.org/wiki/HMAC 
// warning: key is padded to 64 bytes with 0x0 after first function call 

// hmac-sha1 function 
function amazon_hmac($stringToSign) 
{ 
    if (!function_exists('binsha1')) 
    { // helper function binsha1 for amazon_hmac (returns binary value of sha1 hash) 
     if (version_compare(phpversion(), "5.0.0", ">=")) { 
      function binsha1($d) { return sha1($d, true); } 
     } else { 
      function binsha1($d) { return pack('H*', sha1($d)); } 
     } 
    } 

    global $aws_secret; 

    if (strlen($aws_secret) == 40) 
     $aws_secret = $aws_secret.str_repeat(chr(0), 24); 

    $ipad = str_repeat(chr(0x36), 64); 
    $opad = str_repeat(chr(0x5c), 64); 

    $hmac = binsha1(($aws_secret^$opad).binsha1(($aws_secret^$ipad).$stringToSign)); 
    return base64_encode($hmac); 
} 
// hmac-sha1 code END 

?>

來源

2014-02-21 Raja Gopal

回答

0

Infact如果您只需要查看下載數量，則可以在不使用php運行yourown服務器的情況下實現此目的。

如果啓用，此信息已在S3存儲桶日誌中可用。這將更準確，因爲在PHP方法中，如果用戶直接使用S3鏈接並共享/下載，則無法跟蹤下載。

雖然這些日誌很難解析，但像https://qloudstat.com和http://www.s3stat.com/這樣的服務可以幫助您。

另一點：如果您在S3存儲桶前啓用CDN - Cloudfront，下載速度將大大加快。

來源

2014-02-22 15:53:25

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