PHP捲曲：curl_setopt（）fopencookie的失敗

Question

我試圖寫一個腳本，這將緩存圖像，但我堅持了以下錯誤消息：

Nov 4 12:55:19 centos httpd: PHP Fatal error: curl_setopt() [<a href='function.curl-setopt'>function.curl-setopt</a>]: fopencookie failed in /var/www/html/proxy3.php on line 6 

我已經準備好仍然有一個簡單的腳本這個問題：

<?php 
#phpinfo(); 
$fh = fopen('/tmp/yahoo.html', 'xb'); 
if ($fh) { 
     $ch = curl_init('http://www.yahoo.com/'); 
     curl_setopt($ch, CURLOPT_FILE, $fh); # XXX the line 6 
     curl_setopt($ch, CURLOPT_HEADER, FALSE); 
     curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE); 
     curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']); 
     #curl_setopt($ch, CURLOPT_COOKIEJAR, '/dev/null'); 
     #curl_setopt($ch, CURLOPT_COOKIEFILE, '/dev/null'); 
     #curl_setopt($ch, CURLOPT_COOKIEJAR, '/tmp/cookies.txt'); 
     #curl_setopt($ch, CURLOPT_COOKIEFILE, '/tmp/cookies.txt'); 
     curl_exec($ch); 

     if(!curl_errno($ch)) { 
       $info = curl_getinfo($ch); 
        echo 'Took '.$info['total_time'] . 
        's to send a request to '.$info['url']; 
     } 
     curl_close($ch); 
     fclose($fh); 
} else { 
     echo 'Can not open /tmp/yahoo.html'; 
} 
?> 

在/ tmp目錄然後我看到一個零大小的文件：

afarber@centos:html> ls -alZ /tmp/yahoo.html 
-rw-r--r-- apache apache user_u:object_r:httpd_tmp_t  /tmp/yahoo.html 

的是否大家請有想法，這裏有什麼問題？

我試過設置/不設置CURLOPT_COOKIEJAR和CURLOPT_COOKIEFILE - 到/ dev/null的和/或/tmp/cookies.txt。我試過sudo touch /tmp/cookies.txt; sudo chown apache.apache /tmp/cookies.txt。這只是不起作用。

其實我不需要在我的腳本中使用cookies，我很樂意在curl中禁用它們。

我正在使用fopen（...，「xb」），這樣只有一個腳本實例會寫入我的真實腳本中的緩存文件。

我使用CentOS的5.5與PHP-5.1.6-27.el5和未修改的php.ini

謝謝 亞歷

附：這裏是我的真實圖像代理腳本，它與相同的fopencookie錯誤消息失敗。我不能使用的fopen（...， 'WB'）那裏，我必須使用 FOPEN （.... 'XB'）：

<?php 

define('MIN_SIZE', 1024); 
define('MAX_SIZE', 1024 * 1024); 
define('CACHE_DIR', '/var/www/cached_avatars/'); 

$img = urldecode($_GET['img']); 
# URL sanity checks omitted here for brevity 
$cached = CACHE_DIR . md5($img); 
$writefh = @fopen($cached, 'xb'); 
# the file is not cached yet, download it! 
if ($writefh) { 
     $ch = curl_init($img); 
     curl_setopt($ch, CURLOPT_FILE, $writefh); 
     curl_setopt($ch, CURLOPT_HEADER, FALSE); 
     #curl_setopt($ch, CURLOPT_REFERER, $matches[1]); 
     curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']); 
     curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE); 
     #curl_setopt($ch, CURLOPT_COOKIEJAR, '/dev/null'); 
     #curl_setopt($ch, CURLOPT_COOKIEFILE, '/dev/null'); 
     #curl_setopt($ch, CURLOPT_COOKIEJAR, CACHE_DIR . 'cookies.txt'); 
     #curl_setopt($ch, CURLOPT_COOKIEFILE, CACHE_DIR . 'cookies.txt'); 
     curl_exec($ch); 

     $error = curl_errno($ch); 
     $length = curl_getinfo($ch, CURLINFO_SIZE_DOWNLOAD); 
     $mime  = curl_getinfo($ch, CURLINFO_CONTENT_TYPE); 
     $is_image = ($mime != NULL && 
        (stripos($mime, 'image/gif') !== FALSE || 
         stripos($mime, 'image/png') !== FALSE || 
         stripos($mime, 'image/jpg') !== FALSE || 
         stripos($mime, 'image/jpeg') !== FALSE)); 

     curl_close($ch); 
     fclose($writefh); 

     if ($error || $length < MIN_SIZE || $length > MAX_SIZE || !$is_image) { 
       unlink($cached); 
       exit('Download failed: ' . $img); 
     } 
} else { 
     $finfo = finfo_open(FILEINFO_MIME); 
     $mime = finfo_file($finfo, $cached); 
     $length = filesize($cached); 
     finfo_close($finfo); 
} 

$readfh = fopen($cached, 'rb'); 
if ($readfh) { 
     header('Content-Type: ' . $mime); 
     header('Content-Length: ' . $length); 

     while (!feof($readfh)) { 
       $buf = fread($readfh, 8192); 
       echo $buf; 
     } 

     fclose($readfh); 

} 

?> 

Answer 1

感謝所有的答覆，我已經結束了與此PHP/cURL腳本用於緩存圖片（Flash應用程序需要繞過缺少的crossdomain.xml） - 似乎可以與CentOS 5兼容Linux和php-5.1.6-27.el5：

<?php 

define('MIN_SIZE', 512); 
define('MAX_SIZE', 1024 * 1024); 
define('CACHE_DIR', '/var/www/cached_avatars/'); 

$img = urldecode($_GET['img']); 
# img sanity checks omitted here 
$cached = CACHE_DIR . md5($img); 

if (is_readable($cached)) { 
     $finfo = finfo_open(FILEINFO_MIME); 
     $mime = finfo_file($finfo, $cached); 
     $length = filesize($cached); 
     finfo_close($finfo); 
} else { 
     $writefh = fopen($cached, 'wb'); 
     if ($writefh) { 
       flock($writefh, LOCK_EX); 
       $ch = curl_init($img); 
       curl_setopt($ch, CURLOPT_FILE, $writefh); 
       curl_setopt($ch, CURLOPT_HEADER, FALSE); 
       curl_setopt($ch, CURLOPT_REFERER, $matches[1]); 
       curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']); 
       curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE); 
       curl_setopt($ch, CURLOPT_AUTOREFERER, TRUE); 
       curl_exec($ch); 

       $error = curl_errno($ch); 
       $length = curl_getinfo($ch, CURLINFO_SIZE_DOWNLOAD); 
       $mime  = curl_getinfo($ch, CURLINFO_CONTENT_TYPE); 
       $is_image = ($mime != NULL && 
          (stripos($mime, 'image/gif') !== FALSE || 
           stripos($mime, 'image/png') !== FALSE || 
           stripos($mime, 'image/jpg') !== FALSE || 
           stripos($mime, 'image/jpeg') !== FALSE)); 

       curl_close($ch); 
       fclose($writefh); 
       if ($error || $length < MIN_SIZE || $length > MAX_SIZE || !$is_image) { 
         unlink($cached); 
         exit('Download failed: ' . $img); 
       } 
     } 
} 

$readfh = fopen($cached, 'rb'); 
if ($readfh) { 
     header('Content-Type: ' . $mime); 
     header('Content-Length: ' . $length); 

     flock($readfh, LOCK_SH); 

     while (!feof($readfh)) { 
       $buf = fread($readfh, 8192); 
       echo $buf; 
     } 

     fclose($readfh); 
} 

?> 

Answer 2

我認爲這個問題是由於x模式。 fopen當與x模式一起使用時，如果該文件已存在，則返回false。在你的情況下，文件已經存在，$fh將是false，當這傳遞給curl_setopt你會得到這個錯誤。

要解決此問題，請嘗試將xb更改爲wb。

Answer 3

如果你想要的是隻有一個腳本在同一時間訪問該文件，你應該使用cb選項+ flock：

$fh = fopen('/tmp/yahoo.html', 'cb'); 
if (flock($fh, LOCK_EX | LOCK_NB) { 
    //ftruncate($fh, 0); -- truncate the file if that's what you want 
    //continue as usual 
} 
else { 
    //could not obtain lock (without waiting) 
}