php监控apple store是否有货【2014-09-15】（服务器端）

一年一度的苹果新品刚发布后的几天，9月12号就正式上市了，按照惯例，果农们又得在网上拼个你死我活了，香港苹果店在12号下午3点后正式开放购买，还没来得及写好脚本，经过不断的按F5和enter，不懈努力之下，抢到了1台!

抢收过后，特意写下这个脚本，监控苹果网上商店是否有货，有货第一时间发出邮件通知我，网上有类似的订阅服务，留个邮件地址也能收到相关的提醒，也有chrom或者firefox的插件能够在浏览器定时监控，有货第一时间发出窗口通知或者播放警告声。

此类服务的原理大多使用同一原理，就是发送get请求，获取苹果服务器的回应json字符串，判断里面的值,比如这次有isBuyable:true/false.获取方法有很多，比如我这次写的php，运行在服务器端，也能用javascript写，在浏览器定时运行，也能做成浏览器插件，接收来自服务器的返回信息并根据对应的回应进行相关的触发提醒。

至于怎么获取或者怎么知道苹果服务器的get url，有开发经验的童鞋肯定用过firefox 的firebug, 打开http://store.apple.com/hk-zh/buy-iphone/iphone6/ 购买的网页后，打开firebug，然后按照正常购买的流程，比如选择"iphone 6 plus"->"金色"->"64GB",留意这些选项都选中之后，在firebug的网络模块里可以看到浏览器发出了"http://store.apple.com/hk-zh/buyFlowSelectionSummary/IPHONE6P?node=home/shop_iphone/family/iphone6&step=select&option.dimensionScreensize=5_5inch&option.dimensionColor=gold&option.dimensionCapacity=128gb&option.carrierModel=UNLOCKED%2FWW&carrierPolicyType=UNLOCKED" 这样的请求，然后打开该请求的响应信息，内容很长，基本如下：

{"head":{"status":"200","data":{}},
 "body":{"content":{"pageURL":"5.5-吋螢幕-128gb-金色-已解鎖",
 "selected":{"productImage":"<img src=\"http://store.storeimages.cdn-apple.com/7872/as-images.apple.com/is/image/AppleInc/aos/published/images/i/ph/iphone6p/gold/iphone6p-gold-select-2014_GEO_HK_LANG_ZH?wid=110&amp;hei=78&amp;fmt=jpeg&amp;qlt=95&amp;op_sharpen=0&amp;resMode=bicub&amp;op_usm=0.5,1.5,0,0&amp;iccEmbed=0&amp;layer=comp&amp;.v=1410265171755\"  alt=\"\" width=\"110\" height=\"78\" data-scale-params-2=\"wid=220&amp;hei=156&amp;fmt=jpeg&amp;qlt=95&amp;op_sharpen=0&amp;resMode=bicub&amp;op_usm=0.5,1.5,0,0&amp;iccEmbed=0&amp;layer=comp&amp;.v=1410265171755\"  itemprop=\"image\"/>",
 "productTitle":"iPhone 6 Plus 128GB 金色 已解鎖",
 "purchaseOptions":{"financing":"\n\n\n\n\n\n",
                   "promotions":"\n\n<span class=\"gift-card\">\n\n</span>\n",
                   "shippingPrice":"\n<span class=\"freeshipping promo-text\">免費運送</span>",
                   "shippingLead":"\n預計出貨時間<b>:</b><br/>\n<span class=\"customer_commit_display\">暫時無法提供</span>\n\n",
                   "price":"\n<span class=\"current_price\">\n<span itemscope=\"itemscope\" itemprop=\"offers\" itemtype=\"http://schema.org/Offer\">\n\n<meta itemprop=\"priceCurrency\" content=\"HKD\"/>\n<span itemprop=\"price\">\nHK$8,088\n</span>\n</span>\n</span>\n\n\n",
                   "isBuyable":false},
 "partNumber":"MGAF2ZP/A"},
 "pageTitle":"iPhone 6 Plus 128GB 金色 已解鎖 - Apple Store (香港)"}}}

返回的json里面，包含了isBuyable的参数，估计苹果就是利用这个响应来判断是否有存货，并且来控制页面的操作。

知道这个原理后，就可以着手写脚本了，主要是用curl的api来发送请求，将返回的json转换为array，并判断该字段的值，false为无货，true为有货，代码已完成，摘录如下：

<?php
$recipient="[email protected],[email protected],[email protected]";
$from="From: [email protected]\r\n";
$subject="iPhone6 available";
$headers = $from."Content-type: text/html\r\n";
$user_agent="Mozilla/5.0 (Windows NT 6.1; rv:32.0) Gecko/20100101 Firefox/32.0";
$iphone6=array(
                0=>array(‘screensize‘=>‘4_7inch‘,‘color‘=>‘silver‘,‘capacity‘=>‘16gb‘),
                1=>array(‘screensize‘=>‘4_7inch‘,‘color‘=>‘space_gray‘,‘capacity‘=>‘16gb‘),
                2=>array(‘screensize‘=>‘4_7inch‘,‘color‘=>‘gold‘,‘capacity‘=>‘16gb‘),
                3=>array(‘screensize‘=>‘4_7inch‘,‘color‘=>‘silver‘,‘capacity‘=>‘64gb‘),
                4=>array(‘screensize‘=>‘4_7inch‘,‘color‘=>‘space_gray‘,‘capacity‘=>‘64gb‘),
                5=>array(‘screensize‘=>‘4_7inch‘,‘color‘=>‘gold‘,‘capacity‘=>‘64gb‘),
                6=>array(‘screensize‘=>‘4_7inch‘,‘color‘=>‘silver‘,‘capacity‘=>‘128gb‘),
                7=>array(‘screensize‘=>‘4_7inch‘,‘color‘=>‘space_gray‘,‘capacity‘=>‘128gb‘),
                8=>array(‘screensize‘=>‘4_7inch‘,‘color‘=>‘gold‘,‘capacity‘=>‘128gb‘),
                );
$iphone6plus=array(
                0=>array(‘screensize‘=>‘5_5inch‘,‘color‘=>‘silver‘,‘capacity‘=>‘16gb‘),
                1=>array(‘screensize‘=>‘5_5inch‘,‘color‘=>‘space_gray‘,‘capacity‘=>‘16gb‘),
                2=>array(‘screensize‘=>‘5_5inch‘,‘color‘=>‘gold‘,‘capacity‘=>‘16gb‘),
                3=>array(‘screensize‘=>‘5_5inch‘,‘color‘=>‘silver‘,‘capacity‘=>‘64gb‘),
                4=>array(‘screensize‘=>‘5_5inch‘,‘color‘=>‘space_gray‘,‘capacity‘=>‘64gb‘),
                5=>array(‘screensize‘=>‘5_5inch‘,‘color‘=>‘gold‘,‘capacity‘=>‘64gb‘),
                6=>array(‘screensize‘=>‘5_5inch‘,‘color‘=>‘silver‘,‘capacity‘=>‘128gb‘),
                7=>array(‘screensize‘=>‘5_5inch‘,‘color‘=>‘space_gray‘,‘capacity‘=>‘128gb‘),
                8=>array(‘screensize‘=>‘5_5inch‘,‘color‘=>‘gold‘,‘capacity‘=>‘128gb‘),
                );

// iphone 6 
foreach ($iphone6 as $model)
{
    $screensize=$model[‘screensize‘];
    $color=$model[‘color‘];
    $capacity=$model[‘capacity‘];
    $json_url="http://store.apple.com/hk/buyFlowSelectionSummary/IPHONE6?node=home/shop_iphone/family/iphone6&step=select&option.dimensionScreensize=".$screensize."&option.dimensionColor=".$color."&option.dimensionCapacity=".$capacity."&option.carrierModel=UNLOCKED%2FWW&carrierPolicyType=UNLOCKED";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $json_url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);//伪装成浏览器
    $str=curl_exec($ch);
    $str_array=json_decode($str,true);
    curl_close($ch);
    $available=$str_array[‘body‘][‘content‘][‘selected‘][‘purchaseOptions‘][‘isBuyable‘];
    $partnumber=$str_array[‘body‘][‘content‘][‘selected‘][‘partNumber‘];
    if ($available!==false)
        {
            echo $screensize."-".$color."-".$capacity.": is available, please go to http://store.apple.com/hk-zh/buy-iphone/iphone6?cppart=UNLOCKED/WW&product=".$partnumber."&step=accessories"."\n";
            $iphone6msg.="<p>".$screensize." ".$color." ".$capacity." is available, <a target=_blank href=\"http://store.apple.com/hk-zh/buy-iphone/iphone6?cppart=UNLOCKED/WW&product=".$partnumber."&step=accessories\">http://store.apple.com/hk-zh/buy-iphone/iphone6?cppart=UNLOCKED/WW&product=".$partnumber."&step=accessories</a></p>";
        }
}
// iphone 6 plus
foreach ($iphone6plus as $model)
{
    $screensize=$model[‘screensize‘];
    $color=$model[‘color‘];
    $capacity=$model[‘capacity‘];
    $json_url="http://store.apple.com/hk/buyFlowSelectionSummary/IPHONE6P?node=home/shop_iphone/family/iphone6&step=select&option.dimensionScreensize=".$screensize."&option.dimensionColor=".$color."&option.dimensionCapacity=".$capacity."&option.carrierModel=UNLOCKED%2FWW&carrierPolicyType=UNLOCKED";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $json_url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
    $str=curl_exec($ch);
    $str_array=json_decode($str,true);
    curl_close($ch);
    $available=$str_array[‘body‘][‘content‘][‘selected‘][‘purchaseOptions‘][‘isBuyable‘];
    $partnumber=$str_array[‘body‘][‘content‘][‘selected‘][‘partNumber‘];
    if ($available!==false)
        {
            echo $screensize."-".$color."-".$capacity.": is available, please go to http://store.apple.com/hk-zh/buy-iphone/iphone6?cppart=UNLOCKED/WW&product=".$partnumber."&step=accessories"."\n";
            $iphone6msg.="<p>".$screensize." ".$color." ".$capacity." is available, <a target=_blank href=\"http://store.apple.com/hk-zh/buy-iphone/iphone6?cppart=UNLOCKED/WW&product=".$partnumber."&step=accessories\">http://store.apple.com/hk-zh/buy-iphone/iphone6?cppart=UNLOCKED/WW&product=".$partnumber."&step=accessories</a></p>";
        }
}
    
    if (!empty($iphone6msg))
            {
                mail($recipient,$subject,$iphone6msg,$headers);
            }
    //$json_url="http://store.apple.com/hk/buyFlowSelectionSummary/IPHONE6P?node=home/shop_iphone/family/iphone6&step=select&option.dimensionScreensize=".$screensize."&option.dimensionColor=".$color."&option.dimensionCapacity=".$capacity."&option.carrierModel=UNLOCKED%2FWW&carrierPolicyType=UNLOCKED";
//var_dump($i6);

?>

至于该监控是否准确，有待验证，只能坐等苹果有好消息了，希望延迟不会超过10分钟（假如邮件能够正常发送成功的话）。