关于php：curl跟随位置错误

curl follow location error

我收到此错误消息：

CURLOPT_FOLLOWLOCATION cannot be activated when in safe_mode or an open_basedir is set in.

在我的网络托管上，safe_mode已关闭。

open_basedir是"。

我该如何解决？

相关讨论

解决方法是在PHP代码中实现重定向。

这是我自己的实现。它有两个已知的局限性：

它将强制CURLOPT_RETURNTRANSFER

与CURLOPT_HEADERFUNCTION不兼容

代码：

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function curl_exec_follow(/*resource*/ &$ch, /*int*/ $redirects = 20, /*bool*/ $curlopt_header = false) {
if ((!ini_get('open_basedir') && !ini_get('safe_mode')) || $redirects < 1) {
curl_setopt($ch, CURLOPT_HEADER, $curlopt_header);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, $redirects > 0);
curl_setopt($ch, CURLOPT_MAXREDIRS, $redirects);
return curl_exec($ch);
} else {
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FORBID_REUSE, false);

do {
$data = curl_exec($ch);
if (curl_errno($ch))
break;
$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
if ($code != 301 && $code != 302)
break;
$header_start = strpos($data,"

")+2;
$headers = substr($data, $header_start, strpos($data,"

", $header_start)+2-$header_start);
if (!preg_match("!

(?:Location|URI): *(.*?) *

!", $headers, $matches))
break;
curl_setopt($ch, CURLOPT_URL, $matches[1]);
} while (--$redirects);
if (!$redirects)
trigger_error('Too many redirects. When following redirects, libcurl hit the maximum amount.', E_USER_WARNING);
if (!$curlopt_header)
$data = substr($data, strpos($data,"

")+4);
return $data;
}
}

相关讨论

打印此警告消息的唯一位置是ext / curl / interface.c。

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if ((PG(open_basedir) && *PG(open_basedir)) || PG(safe_mode)) {
if (Z_LVAL_PP(zvalue) != 0) {
php_error_docref(NULL TSRMLS_CC, E_WARNING,"CURLOPT_FOLLOWLOCATION cannot be activated when in safe_mode or an open_basedir is set");
RETVAL_FALSE;
return 1;
}
}

从if条件可以看出，必须启用open_basedir或safe_mode。

相关讨论

不久前，我遇到了类似的情况，并在下面找到了解决方案。如果您大致知道将您重定向到的位置，则可能对您有用。

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function curl($url, $postVars)
{
$go = curl_init($url);
curl_setopt ($go, CURLOPT_URL, $url);
curl_setopt($go, CURLOPT_VERBOSE, 1);

//follow on location problems
if (ini_get('open_basedir') == '' && ini_get('safe_mode' == 'Off'))
{
curl_setopt ($go, CURLOPT_FOLLOWLOCATION, $l);
$syn = curl_exec($go);
if(curl_error($go))
return false;
}
else
$syn = curl_redir_exec($go, $postVars);
curl_close($go);
return $syn;
}

function curl_redir_exec($ch, $postVars)
{
static $curl_loops = 0;
static $curl_max_loops = 20;
if ($curl_loops++>= $curl_max_loops)
{
$curl_loops = 0;
return FALSE;
}
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postVars);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

$data = curl_exec($ch);
if(curl_error($ch))
return false;
list($header, $data) = explode("

", $data, 2);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);

$redirect_page ="[0-9]*.html";
$base_redirect ="http://example.com/";

if ($http_code == 301 || $http_code == 302)
{
$matches = array();
$pregs = eregi($redirect_page, $data, $matches);
$new_url = $base_redirect . $matches[0];
if (!$new_url)
{
//couldn't process the url to redirect to
$curl_loops = 0;
return $data;
}
curl_setopt($ch, CURLOPT_URL, $new_url);

return curl_redir_exec($ch, $postVars);
}
else
{
$curl_loops=0;
return $data;
}
}

请注意：

此处包含代码的所有答案均手动解析curl请求中的标头，以找到Location:标头。

但是，从PHP 5.3.7开始，有一个选项CURLINFO_REDIRECT_URL可与curl_getinfo()一起使用。无需重复执行两次请求，如果您不需要标题，则无需启用标头，也不需要正则表达式。

从未在实际环境中进行过测试，但是curl_exec具有更高的透明度(标头和returntransfer选项没有问题)。

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function curl_exec_follow(/*resource*/ $ch, /*int*/ $maxredirect = 5) {
if (ini_get('open_basedir') == '' && ini_get('safe_mode' == 'Off')) {
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
} else {
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
$newurl = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);

$rch = curl_copy_handle($ch);
curl_setopt($rch, CURLOPT_HEADER, true);
curl_setopt($rch, CURLOPT_NOBODY, true);
curl_setopt($rch, CURLOPT_RETURNTRANSFER, true);
do {
curl_setopt($rch, CURLOPT_URL, $newurl);
$header = curl_exec($rch);
if (curl_errno($rch)) {
$code = 0;
} else {
$code = curl_getinfo($rch, CURLINFO_HTTP_CODE);
if ($code == 301 || $code == 302) {
preg_match('/Location:(.*?)
/', $header, $matches);
$newurl = trim(array_pop($matches));
} else {
$code = 0;
}
}
} while ($code && $maxredirect--);
curl_close($rch);
curl_setopt($ch, CURLOPT_URL, $newurl);
}
return curl_exec($ch);
}

相关讨论

如果已经配置了$curl实例，并且只想在启用FOLLOWLOCATION的情况下模拟curl_exec，则可以使用以下示例：

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function curl_follow_exec($curl, $url = null)
{
curl_setopt($curl, CURLOPT_HEADER, true);
if (!is_null($url))
{
$opts = array (
CURLOPT_URL => $url,
CURLOPT_POST => false,
CURLOPT_PUT => false,
);
curl_setopt_array($curl, $opts);
}
$data = curl_exec($curl);
$status = curl_getinfo($curl);
$arr = explode("

", $data);
while (strpos(reset($arr), 'HTTP/1.1 100 Continue') !== false)
{
array_shift($arr);
}
$header = $arr[0];
$body = implode("

", array_slice($arr, 1));
if ($status['http_code'] == 301 || $status['http_code'] == 302)
{
$matches = array ();
preg_match("/(Location:|URI:)[^(
)]*/", $header, $matches);
$url = trim(str_replace($matches[1],"", $matches[0]));
return curl_follow_exec($curl, $url);
}
return $body;
}

注意：如果您已经指定了选项，则在调用此函数时不要提供URL，它仅用于递归目的。

我从可接受的答案中启发了这段代码，并添加了一些东西来管理多个标题。

此功能就像是针对ie6的丑陋骇客：如果可以，请更改您的托管:-)。