pjm*_*rse 9 javascript performance client-side openx page-load-time
我们使用OpenX在多个网站上投放广告.但是,如果OpenX服务器出现问题,它会阻止这些站点上的页面加载.我宁愿让网站优雅地失败,即加载没有广告的网页,并在网站可用时填写.
我们正在使用OpenX的单页调用,我们在CSS中给div显式大小,这样它们可以在没有内容的情况下布局,但仍然加载脚本块页面加载.是否有其他使用OpenX加速页面的最佳实践?
我们在iframe中加载广告,以避免您遇到的问题.我们将div和iframe的大小相同,iframe指向一个只包含广告代码段的页面(您可以将区域和其他必需的选项作为参数传递给该页面).
干杯
背风处
我们懒惰加载OpenX的代码.我们将其放在底部,而不是将单页调用放在页面顶部.页面加载后,调用将获取横幅数据,自定义代码将在正确的区域中添加正确的横幅.
下面的代码需要一个合适的DOM.如果您有jQuery,DOMAssistant,FlowJS等,那么应该为您修复DOM.此代码适用于包含图像,Flash或HTML内容的普通横幅.在某些情况下,例如使用来自外部提供商(adform等)的横幅时,它可能无效.为此,您可能需要稍微破解代码.
如何使用它?
使用风险自负!:) 希望能帮助到你
(function(){
if (!document || !document.getElementById || !document.addEventListener || !document.removeClass) {
return; // No proper DOM; give up.
}
var openx_timeout = 1, // limit the time we wait for openx
oZones = new Object(), // list of [div_id] => zoneID
displayBannerAds; // function.
// oZones.<divID> = <zoneID>
// eg: oZones.banner_below_job2 = 100;
// (generated on the server side with PHP)
oZones.banner_top = 23;
oZones.banner_bottom = 34;
displayBannerAds = function(){
if( typeof(OA_output)!='undefined' && OA_output.constructor == Array ){
// OpenX SinglePageCall ready!
if (OA_output.length>0) {
for (var zone_div_id in oZones){
zoneid = oZones[zone_div_id];
if(typeof(OA_output[zoneid])!='undefined' && OA_output[zoneid]!='') {
var flashCode,
oDIV = document.getElementById( zone_div_id );
if (oDIV) {
// if it's a flash banner..
if(OA_output[zoneid].indexOf("ox_swf.write")!=-1)
{
// extract javascript code
var pre_code_wrap = "<script type='text/javascript'><!--// <![CDATA[",
post_code_wrap = "// ]]> -->";
flashCode = OA_output[zoneid].substr(OA_output[zoneid].indexOf(pre_code_wrap)+pre_code_wrap.length);
flashCode = flashCode.substr(0, flashCode.indexOf(post_code_wrap));
// replace destination for the SWFObject
flashCode = flashCode.replace(/ox\_swf\.write\(\'(.*)'\)/, "ox_swf.write('"+ oDIV.id +"')");
// insert SWFObject
if( flashCode.indexOf("ox_swf.write")!=-1 ){
eval(flashCode);
oDIV.removeClass('hidden');
}// else: the code was not as expected; don't show it
}else{
// normal image banner; just set the contents of the DIV
oDIV.innerHTML = OA_output[zoneid];
oDIV.removeClass('hidden');
}
}
}
} // end of loop
}//else: no banners on this page
}else{
// not ready, let's wait a bit
if (openx_timeout>80) {
return; // we waited too long; abort
};
setTimeout( displayBannerAds, 10*openx_timeout );
openx_timeout+=4;
}
};
displayBannerAds();
})();
Run Code Online (Sandbox Code Playgroud)
OpenX 有一些关于如何异步加载标签的文档: http://docs.openx.com/ad_server/adtagguide_synchjs_implementing_async.html
我已经测试过了,它在当前的 Chrome/Firefox 中运行良好。
需要对其广告代码进行一些手动调整。他们的广告代码应如何结束的示例:
<html>
<head></head>
<body>
Some content here.
Ad goes here.
<!-- Preserve space while the rest of the page loads. -->
<div id="placeholderId" style="width:728px;height:90px">
<!-- Fallback mechanism to use if unable to load the script tag. -->
<noscript>
<iframe id="4cb4e94bd5bb6" name="4cb4e94bd5bb6"
src="http://d.example.com/w/1.0/afr?auid=8&target=
_blank&cb=INSERT_RANDOM_NUMBER_HERE"
frameborder="0" scrolling="no" width="728"
height="90">
<a href="http://d.example.com/w/1.0/rc?cs=
4cb4e94bd5bb6&cb=INSERT_RANDOM_NUMBER_HERE"
target="_blank">
<img src="http://d.example.com/w/1.0/ai?auid=8&cs=
4cb4e94bd5bb6&cb=INSERT_RANDOM_NUMBER_HERE"
border="0" alt=""></a></iframe>
</noscript>
</div>
<!--Async ad request with multiple parameters.-->
<script type="text/javascript">
var OX_ads = OX_ads || [];
OX_ads.push({
"slot_id":"placeholderId",
"auid":"8",
"tid":"4",
"tg":"_blank",
"r":"http://redirect.clicks.to.here/landing.html",
"rd":"120",
"rm":"2",
"imp_beacon":"HTML for client-side impression beacon",
"fallback":"HTML for client-side fallback"
});
</script>
<!-- Fetch the Tag Library -->
<script type="text/javascript" src="http://d.example.com/w/1.0/jstag"></script>
Some other content here.
</body>
</html>
Run Code Online (Sandbox Code Playgroud)
| 归档时间: |
|
| 查看次数: |
7329 次 |
| 最近记录: |