javascript - php session 随机丢失，无法理解为什么

Question

我付钱请程序员制作购物篮脚本以使用 Spreadshirt API。一切都运行良好，除了篮子自己不断清空。我认为 session 在某个时候丢失了，因此脚本创建了另一个 BasketId。

我试图找出它发生的具体原因，但没有成功...我无法重现该错误。它只是随机发生，没有任何原因。关闭浏览器、重置 apache 甚至整个网络服务器都不会导致 session 丢失。

我有两个不同的脚本在同一个域上使用 cookie，它们没有任何问题(一个是用于管理员登录 session 的 cookie，另一个 cookie 用于保存用户在商店中最后查看的文章)

我尝试了在谷歌上找到的所有解决方案但没有成功:编辑 php.ini ，通过 php 强制 ini 设置，尝试了 htaccess 方式，...

这是我的 phpinfo 的“ session ”部分:http://gyazo.com/168e2144ddd9ee368a05754dfd463021

shop-ajax.php(第 18 行的 session 处理)

ini_set('session.cookie_domain', '.mywebsite.com' );
header("Pragma: no-cache");
header("Cache-Control: no-store, no-cache, max-age=0, must-revalidate");
$language = addslashes($_GET['l']);
$shopid = addslashes($_GET['shop']);


// if($_SERVER['HTTP_X_REQUESTED_WITH'] != 'XMLHttpRequest') {
//  die("no direct access allowed");
// }



if(!session_id()) {
  $lifetime=60 * 60 * 24 * 365;
  $domain = ".mywebsite.com";
   session_set_cookie_params($lifetime,"/",$domain);
    @session_start();
}





// Configuration
$config['ShopSource'] = "com";
$config['ShopId'] = $shopid;
$config['ShopKey'] = "*****";
$config['ShopSecret'] = "*****";



/*
 * add an article to the basket
*/
if (isset($_POST['size']) && isset($_POST['appearance']) && isset($_POST['quantity'])) {
    /*
     * create an new basket if not exist
    */
    if (!isset($_SESSION['basketUrl'])) {
        /*
         * get shop xml
        */
        $stringApiUrl = 'http://api.spreadshirt.'.$config['ShopSource'].'/api/v1/shops/' . $config['ShopId'];
        $stringXmlShop = oldHttpRequest($stringApiUrl, null, 'GET');
        if ($stringXmlShop[0]!='<') die($stringXmlShop);
        $objShop = new SimpleXmlElement($stringXmlShop);
        if (!is_object($objShop)) die('Basket not loaded');

        /*
         * create the basket
        */
        $namespaces = $objShop->getNamespaces(true);
        $basketUrl = createBasket('net', $objShop, $namespaces);
        $_SESSION['basketUrl'] = $basketUrl;
        $_SESSION['namespaces'] = $namespaces;

        /*
         * get the checkout url
        */
        $checkoutUrl = checkout($_SESSION['basketUrl'], $_SESSION['namespaces']);

        // basket language workaround
        if ($language=="fr") {
            if (!strstr($checkoutUrl,'/fr')) {
                $checkoutUrl = str_replace("spreadshirt.com","spreadshirt.com/fr",$checkoutUrl);
            }
        }

        $_SESSION['checkoutUrl'] = $checkoutUrl;

    }



    /*
    Workaround for not having the appearance id :(
    */
    if ($_POST['appearance']==0) {
        $stringApiArticleUrl = 'http://api.spreadshirt.'.$config['ShopSource'].'/api/v1/shops/' . $config['ShopId'].'/articles/'.intval($_POST['article']).'?fullData=true';
        $stringXmlArticle = oldHttpRequest($stringApiArticleUrl, null, 'GET');
        if ($stringXmlArticle[0]!='<') die($stringXmlArticle);
        $objArticleShop = new SimpleXmlElement($stringXmlArticle);
        if (!is_object($objArticleShop)) die('Article not loaded');
        $_POST['appearance'] = intval($objArticleShop->product->appearance['id']);
    }


    /*
     * article data to be sent to the basket resource
    */
    $data = array(

            'articleId' => intval($_POST['article']),
            'size' => intval($_POST['size']),
            'appearance' => intval($_POST['appearance']),
            'quantity' => intval($_POST['quantity']),
            'shopId' => $config['ShopId']

    );

    /*
     * add to basket
    */
    addBasketItem($_SESSION['basketUrl'] , $_SESSION['namespaces'] , $data);

    $basketData = prepareBasket();


    echo json_encode(array("c" => array("u" => $_SESSION['checkoutUrl'],"q" => $basketData[0],"l" => $basketData[1])));
}




// no call, just read basket if not empty
if (isset($_GET['basket'])) {
    if (array_key_exists('basketUrl',$_SESSION) && !empty($_SESSION['basketUrl'])) {

        $basketData = prepareBasket();

        echo json_encode(array("c" => array("u" => $_SESSION['checkoutUrl'],"q" => $basketData[0],"l" => $basketData[1])));
    } else {
        echo json_encode(array("c" => array("u" => "","q" => 0,"l" => "")));
    }
}






function prepareBasket() {

    $intInBasket=0;

    if (isset($_SESSION['basketUrl'])) {
        $basketItems=getBasket($_SESSION['basketUrl']);

        if(!empty($basketItems)) {
            foreach($basketItems->basketItems->basketItem as $item) {
                $intInBasket += $item->quantity;
            }
        }
    }

    $l = "";
    $pQ = parse_url($_SESSION['checkoutUrl']);
    if (preg_match("#^basketId\=([0-9a-f\-])*$#i", $pQ['query'])) {
        $l = $pQ['query'];
    }

    return array($intInBasket,$l);
}







// Additional functions
function addBasketItem($basketUrl, $namespaces, $data) {
    global $config;

    $basketItemsUrl = $basketUrl . "/items";

    $basketItem = new SimpleXmlElement('<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
            <basketItem xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://api.spreadshirt.net">
            <quantity>' . $data['quantity'] . '</quantity>
            <element id="' . $data['articleId'] . '" type="sprd:article" xlink:href="http://api.spreadshirt.'.$config['ShopSource'].'/api/v1/shops/' . $data['shopId'] . '/articles/' . $data['articleId'] . '">
            <properties>
            <property key="appearance">' . $data['appearance'] . '</property>
            <property key="size">' . $data['size'] . '</property>
            </properties>
            </element>
            <links>
            <link type="edit" xlink:href="http://' . $data['shopId'] .'.spreadshirt.' .$config['ShopSource'].'/-A' . $data['articleId'] . '"/>
            <link type="continueShopping" xlink:href="http://' . $data['shopId'].'.spreadshirt.'.$config['ShopSource'].'"/>
            </links>
            </basketItem>');

    $header = array();
    $header[] = createAuthHeader("POST", $basketItemsUrl);
    $header[] = "Content-Type: application/xml";
    $result = oldHttpRequest($basketItemsUrl, $header, 'POST', $basketItem->asXML());
}



function createBasket($platform, $shop, $namespaces) {

    $basket = new SimpleXmlElement('<basket xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://api.spreadshirt.net">
            <shop id="' . $shop['id'] . '"/>
            </basket>');

    $attributes = $shop->baskets->attributes($namespaces['xlink']);
    $basketsUrl = $attributes->href;
    $header = array();
    $header[] = createAuthHeader("POST", $basketsUrl);
    $header[] = "Content-Type: application/xml";
    $result = oldHttpRequest($basketsUrl, $header, 'POST', $basket->asXML());
    $basketUrl = parseHttpHeaders($result, "Location");

    return $basketUrl;

}






function checkout($basketUrl, $namespaces) {

    $basketCheckoutUrl = $basketUrl . "/checkout";
    $header = array();
    $header[] = createAuthHeader("GET", $basketCheckoutUrl);
    $header[] = "Content-Type: application/xml";
    $result = oldHttpRequest($basketCheckoutUrl, $header, 'GET');
    $checkoutRef = new SimpleXMLElement($result);
    $refAttributes = $checkoutRef->attributes($namespaces['xlink']);
    $checkoutUrl = (string)$refAttributes->href;

    return $checkoutUrl;

}

/*
 * functions to build headers
*/
function createAuthHeader($method, $url) {
    global $config;

    $time = time() *1000;
    $data = "$method $url $time";
    $sig = sha1("$data ".$config['ShopSecret']);

    return "Authorization: SprdAuth apiKey=\"".$config['ShopKey']."\", data=\"$data\", sig=\"$sig\"";

}


function parseHttpHeaders($header, $headername) {

    $retVal = array();
    $fields = explode("\r\n", preg_replace('/\x0D\x0A[\x09\x20]+/', ' ', $header));

    foreach($fields as $field) {

        if (preg_match('/(' . $headername . '): (.+)/m', $field, $match)) {
            return $match[2];
        }

    }

    return $retVal;

}

function getBasket($basketUrl) {

    $header = array();
    $basket = "";

    if (!empty($basketUrl)) {
        $header[] = createAuthHeader("GET", $basketUrl);
        $header[] = "Content-Type: application/xml";
        $result = oldHttpRequest($basketUrl, $header, 'GET');
        $basket = new SimpleXMLElement($result);
    }

    return $basket;

}




function oldHttpRequest($url, $header = null, $method = 'GET', $data = null, $len = null) {

    switch ($method) {

        case 'GET':

            $ch = curl_init($url);
            curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($ch, CURLOPT_HEADER, false);

            if (!is_null($header)) curl_setopt($ch, CURLOPT_HTTPHEADER, $header);

            break;

        case 'POST':

            $ch = curl_init($url);
            curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($ch, CURLOPT_HEADER, true);
            curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
            curl_setopt($ch, CURLOPT_POST, true); //not createBasket but addBasketItem
            curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

            break;

    }

    $result = curl_exec($ch);
    curl_close($ch);

    return $result;

}
?>

还有脚本的其他两个部分:一个用于将 sample T 恤添加到购物篮的表单 (example.php) 和一个调用 ajax 的脚本 (shop-controller.js )。如果需要可以发布，但没有 session 处理内容。

更新 - 也许问题与 session 无关。 BasketId 丢失，但 PHPSESSID 在浏览器 cookie 中保持不变。

我在过去 3 天做了以下测试(使用不同的计算机和浏览器进行了测试):

• 清空浏览器 cookie，然后在下午开始新的 session

• 将 1 件商品添加到购物篮，我记下 BasketId 并检查浏览器 cookie 以记下 PHPSESSID

• 通常总是在午夜左右，篮子自己空了

• PHPSESSID 在我的浏览器 cookie 中保持不变，即使在购物篮自行清空之后也是如此

• 但是BASKETID不一样，下午用的丢了重新生成一个

服务器是 CentOS 5.9 - PHP 版本 5.2.9(来自 OVH)。专用 IP 上的专用服务器。

Answer 1

首先您需要确定问题是出在 session 的垃圾回收中还是代码中的逻辑错误。为此，您可以:

// Add this right after session_start()
if (!isset($_SESSION['mySessionCheck'])) {
    $_SESSION['mySessionCheck'] = "This session (" . session_id() . ") started " . date("Y-m-d H:i:s");
}

// For HTML pages, add this:
echo '<!-- ' . $_SESSION['mySessionCheck'] . ' -->';

// For AJAX pages, add "mySessionCheck" to the JSON response:
echo json_encode(
    array(
        "c" => array(
            "u" => $_SESSION['checkoutUrl'],
            "q" => $basketData[0],
            "l" => $basketData[1]
        ),
        "mySessionCheck" => $_SESSION['mySessionCheck']
    )
);

如果此消息在篮子清空的同时发生变化，那么您肯定会知道这是 PHP session 的问题。

在这种情况下，您可以尝试以下几种方法:

1)你在做什么

$lifetime=60 * 60 * 24 * 365;
$domain = ".mywebsite.com";
session_set_cookie_params($lifetime,"/",$domain);
@session_start();

但是根据user contributed note来自 PHP.net 文档:

PHP's Session Control does not handle session lifetimes correctly when using session_set_cookie_params().

因此您可以尝试使用 setcookie() 代替:

$lifetime=60 * 60 * 24 * 365;
session_start();
setcookie(session_name(),session_id(),time()+$lifetime);

尽管评论中指出这是一个 4 年前的记录，但我对其进行了测试并且它仍然发生(我在 PHP 5.5.7、Windows Server 2008、IIS/7.5 上)。只有 setcookie() 生成 HTTP header 以更改到期日期(例如将 $lifetime 设置为 600):

Set-Cookie: PHPSESSID=(the id); expires=Mon, 22-Jun-2015 15:03:17 GMT; Max-Age=600

2) 如果您使用的是 Debian 服务器或某些衍生产品，它们 use a cron job to clear out PHP sessions ，所以你可以尝试:

• Increasing server's configured maxlifetime ;
• Saving your sessions somewhere else ;
• 使用memcached .

3) 要查看是否有进程清除您的 session ，您可以查看 session 文件存储的目录(实际路径因服务器而异，使用session_save_path 查找位置你的)。我不是服务器管理员，但我读过你可以使用 auditctl为此，请确保您登录 who made the changes to your files .

4) 如果您无权访问服务器配置，或者不想依赖服务器配置(如果您切换主机则很好)，您可以实现自己的 session 处理程序。看看这个 example by Pedro Gimeno .