Question

我正在尝试编写一个可以缓存图像的脚本，但是我遇到了以下错误信息：

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

我准备了一个更简单的脚本，但仍有这个问题：

<?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目录中，我看到一个零大小的文件：

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

请有人知道，这里出了什么问题？

我已尝试将 CURLOPT_COOKIEJAR 和 CURLOPT_COOKIEFILE 设置/设置为/ dev / null和/或设置为/tmp/cookies.txt。我试过 sudo touch /tmp/cookies.txt; sudo chown apache.apache /tmp/cookies.txt 也是。这不行。

实际上我的脚本中不需要cookie，我很乐意在卷曲中禁用它们。

我故意使用 fopen（...，“xb”），因此只有一个脚本实例会在我的真实脚本中写入缓存文件。

我使用的是带有php-5.1.6-27.el5的CentOS 5.5和未经修改的php.ini

谢谢你，亚历

P.S。这是我的真实图像代理脚本，它失败了同样的fopencookie错误消息。我不能在那里使用 fopen（....，'wb'），我必须使用 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

我认为问题是因为x模式。 fopen与x模式一起使用时，如果文件已存在，则返回false。在您的情况下，该文件已存在，$fh将为false，当传递给curl_setopt时，您会收到此错误。

要解决此问题，请尝试将xb更改为wb。

Answer 2

如果您想要的只是一个同时访问该文件的脚本，则应使用cb选项+ 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)
}

Answer 3

感谢所有回复，我最终得到了这个用于缓存图像的PHP / cURL脚本（Flash应用程序需要绕过丢失的crossdomain.xml） - 似乎可以使用CentOS 5 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);
}

?>

PHP curl：curl_setopt（）fopencookie失败了

3 个答案: