分析google adsence

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<script type="text/javascript"><!--

google_ad_client = "pub-9999999999";

//mayongzhan_image

google_ad_slot = "8888888888";

google_ad_width = 200;

google_ad_height = 200;

//--></script>

<script type="text/javascript"

src="http://pagead2.googlesyndication.com/pagead/show_ads.js">

</script>

以上是googleAdsence的一段显示广告的代码,src引用的那个show_ads.js已经附在本文最后

adsence可以分为三个部分.一个是上面提到的给客户端的东西.然后是那个show_ads.js,然后是后台的处理(主要是访问的来源, 广告的信息,然后这些信息会进行分析.排除无效的,计算次数,总价).

提出问题:

js获得页面的信息都有哪些

本地js和远程js交互

远程的js进行和服务器的通讯传送这些信息

问题一分析:

1js直接取得页面内容

以前认为js可以获得当前页的内容.这个假设仔细分析后不攻自破

将js放在首页的最顶端.还是可以显示出来广告内容.gg说根据内容显示,如果是在js执行时读取到内容的话,那么放在首页应该是空白广告,因为分析不到内容.

而且如果用js取得到内容后gg再进行分析,然后返回广告,这样开销会很大,速度会很慢

所以js取得页面内容是非常不可能的.

2gg根据搜索引擎来返回广告内容

这点倒是有可能,而且比重会很大,由于gg是搜索,当然页面的数据一定有.也可以分析出来某一页的内容来返回正确的广告.但有一个问题.如果是还没有收录的网站是不是就只能显示空白广告和公益的???当然不是.实验证明,没有被收录的也能返回广告.

3ggADsence有自己的搜索引擎

这点很有可能,因为其他的联盟也要根据内容来分广告.当然他们不是搜索引擎,他们要分析当然就要有自己的搜索引擎,ggadsence是收构来的,当然这点一定会有的.gg只是在原来的基础上进行了二次开发.并入了自己的搜索引擎.

问题二分析:

以下这句是本地js去获取远程js的内容,当然之前已经定义了ad的一些变量.

src="http://pagead2.googlesyndication.com/pagead/show_ads.js">

问题三分析:

php分析出来的信息.然后显示广告.然后传给js

<script src="http://blog.csdn.net/mayongzhan"></script>

以下是远程js向外的输出.直接显示,

documentobj.write("><iframe name="google_ads_frame" width='+tostr(windowsobj.google_ad_width)+" height="+tostr(windowsobj.google_ad_height)+" frameborder="+tostr(windowsobj.google_ad_frameborder)+" src="+tostr(src)+' marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no">');

documentobj.write("</iframe>")

以下内容是远程js去得到服务端返回的地址.

http://pagead2.googlesyndication.com/pagead/ads?client=ca-pub-****************&dt=1192609508812&lmt=1192609507&alternate_ad_url=http%3A%2F%2Fblog.csdn.net%2mayongzhan%2Findex.aspx&format=336x280_as&output=html&correlator=1192609508812&channel=1706865999&url=http%3A%2F%2Fblog.csdn.net%2Fmayongzhan&color_bg=FFFFFF&color_text=000000&color_link=0000FF&color_url=0000ff&color_border=FFFFFF&ad_type=text&ref=http%3A%2F%2Fblog.csdn.net%2Fmayongzhan&cc=100&ga_vid=755368682.1164897696&ga_sid=1192607761&ga_hid=1246793956&ga_fc=true&flash=9&u_h=1024&u_w=1280&u_ah=971&u_aw=1280&u_cd=32&u_tz=480&u_his=7&u_java=true&u_nplug=15&u_nmime=50

下面是show_ads.js的代码,翻译过来的码和源码

(function(){

/*

tostr(): add '"' at b's arround

*/

function tostr(b){

return b!=null?'"'+b+'"':'""'

}

/*

encodeuri()

*/

function encodeuri(b){

if(typeof encodeuricomponent=="function"){

return encodeuricomponent(b)

}else{

return escape(b)

}

}

/*

seturlpar()

*/

function seturlpar(b,a){

if(a){

window.google_ad_url+="&"+b+"="+a

}

}

/*

seturlnnpar()

*/

function seturlnnpar(parm,val){

if(val){

seturlpar(parm,encodeuri(val))

}

}

/*

setcolpar()

*/

function setcolpar(b,a,d){

if(a&&typeof a=="object"){

a=a[d%a.length]

}

seturlpar("color_"+b,a)

}

/*

setsysinfo()

*/

function setsysinfo(b,a){

var d=b.screen,g=navigator.javaenabled(),e=-a.gettimezoneoffset();

if(d){

seturlpar("u_h",d.height);

seturlpar("u_w",d.width);

seturlpar("u_ah",d.availheight);

seturlpar("u_aw",d.availwidth);

seturlpar("u_cd",d.colordepth)

}

seturlpar("u_tz",e);

seturlpar("u_his",history.length);

seturlpar("u_java",g);

if(navigator.plugins){

seturlpar("u_nplug",navigator.plugins.length)

}

if(navigator.mimetypes){

seturlpar("u_nmime",navigator.mimetypes.length)

}

}

/*

setggpubid()

*/

function setggpubid(b){

b=b.tolowercase();

if(b.substring(0,3)!="ca-"){

b="ca-"+b

}

return b

}

待续...

/*

writeggcode()

*/

function writeggcode(windowsobj,documentobj,src){

src=src.substring(0,1000);

src=src.replace(/%\w?$/,"");

if(windowsobj.google_ad_output=="js"&&(windowsobj.google_ad_request_done||windowsobj.google_radlink_request_done)){

documentobj.write('<script language="javascript1.1" src="+tostr(src)+&quot;&gt;&lt;\/script&gt;&quot;)

}else if(windowsobj.google_ad_output==&quot;html&quot;){

if(windowsobj.name!=&quot;google_ads_frame&quot;){

documentobj.write("><iframe name="google_ads_frame" width='+tostr(windowsobj.google_ad_width)+" height="+tostr(windowsobj.google_ad_height)+" frameborder="+tostr(windowsobj.google_ad_frameborder)+" src="+tostr(src)+' marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no">');

documentobj.write("</iframe>")

}

}else if(windowsobj.google_ad_output=="textlink"){

documentobj.write('<script language="javascript1.1" src='+tostr(src)+"><\/script>")

}

}

/*

reset()

*/

function reset(windowsobj){

var a=null;

windowsobj.google_ad_frameborder=a;

windowsobj.google_ad_format=a;

windowsobj.google_page_url=a;

windowsobj.google_language=a;

windowsobj.google_gl=a;

windowsobj.google_country=a;

windowsobj.google_region=a;

windowsobj.google_city=a;

windowsobj.google_hints=a;

windowsobj.google_safe=a;

windowsobj.google_encoding=a;

windowsobj.google_ad_output=a;

windowsobj.google_max_num_ads=a;

windowsobj.google_ad_channel=a;

windowsobj.google_contents=a;

windowsobj.google_alternate_ad_url=a;

windowsobj.google_alternate_color=a;

windowsobj.google_color_bg=a;

windowsobj.google_color_text=a;

windowsobj.google_color_link=a;

windowsobj.google_color_url=a;

windowsobj.google_color_border=a;

windowsobj.google_color_line=a;

windowsobj.google_adtest=a;

windowsobj.google_kw_type=a;

windowsobj.google_kw=a;

windowsobj.google_num_radlinks=a;

windowsobj.google_max_radlink_len=a;

windowsobj.google_rl_filtering=a;

windowsobj.google_rl_mode=a;

windowsobj.google_rt=a;

windowsobj.google_ad_type=a;

windowsobj.google_image_size=a;

windowsobj.google_feedback=a;

windowsobj.google_skip=a;

windowsobj.google_page_location=a;

windowsobj.google_referrer_url=a;

windowsobj.google_ad_region=a;

windowsobj.google_ad_section=a;

windowsobj.google_bid=a;

windowsobj.google_cpa_choice=a;

windowsobj.google_cust_age=a;

windowsobj.google_cust_gender=a;

windowsobj.google_cust_interests=a;

windowsobj.google_cust_id=a;

windowsobj.google_cust_job=a;

windowsobj.google_cust_u_url=a;

windowsobj.google_cust_ch=a;

windowsobj.google_ed=a;

windowsobj.google_targeting=a;

windowsobj.google_ad_host=a

}

function ggadsetup(){

var b=null,winobj=window,docobj=document,g=new date,e=g.gettime(),j=a.google_ad_format;

if(winobj.google_cpa_choice){

winobj.google_ad_url="http://pagead2.googlesyndication.com/cpa/ads?";

winobj.google_ad_url+="client="+escape(setggpubid(winobj.google_ad_client));

winobj.google_ad_region="_google_cpa_region_";

seturlpar("cpa_choice",winobj.google_cpa_choice);

if(typeof docobj.characterset!="undefined"){

seturlnnpar("oe",docobj.characterset)

}else if(typeof docobj.charset!="undefined"){

seturlnnpar("oe",docobj.charset)

}

}else{

winobj.google_ad_url="http://pagead2.googlesyndication.com/pagead/ads?";

winobj.google_ad_url+="client="+escape(setggpubid(winobj.google_ad_client))

}

seturlpar("host",winobj.google_ad_host);

var k=winobj.google_num_slots_by_client,w=winobj.google_num_slots_by_channel,i=winobj.google_prev_ad_formats_by_region;

winobj.onerror=winobj.google_org_error_handler;

if(winobj.google_ad_region==b&&winobj.google_ad_section!=b){

winobj.google_ad_region=winobj.google_ad_section

}

var googlead_region=winobj.google_ad_region==b?"":winobj.google_ad_region,q=false;

if(j){

q=j.indexof("_0ads")>0

}

if(q){

if(winobj.google_num_0ad_slots){

winobj.google_num_0ad_slots=winobj.google_num_0ad_slots+1

}else{

winobj.google_num_0ad_slots=1

}

if(winobj.google_num_0ad_slots>1){

return

}

}else if(!winobj.google_cpa_choice){

if(winobj.google_num_ad_slots){

winobj.google_num_ad_slots=winobj.google_num_ad_slots+1

}else{

winobj.google_num_ad_slots=1

}

if(winobj.google_num_slots_to_rotate){

i[googlead_region]=b;

if(winobj.google_num_slot_to_show==b){

winobj.google_num_slot_to_show=e%winobj.google_num_slots_to_rotate+1

}

if(winobj.google_num_slot_to_show!=winobj.google_num_ad_slots){

return

}

}else if(winobj.google_num_ad_slots>3&&googlead_region==""){

return

}

}

seturlpar("dt",g.gettime());

seturlpar("hl",winobj.google_language);

if(winobj.google_country){

seturlpar("gl",winobj.google_country)

}else{

seturlpar("gl",winobj.google_gl)

}

seturlpar("gr",winobj.google_region);

seturlnnpar("gcs",winobj.google_city);

seturlnnpar("hints",winobj.google_hints);

seturlpar("adsafe",winobj.google_safe);

seturlpar("oe",winobj.google_encoding);

seturlpar("lmt",winobj.google_last_modified_time);

seturlnnpar("alternate_ad_url",winobj.google_alternate_ad_url);

seturlpar("alt_color",winobj.google_alternate_color);

seturlpar("skip",winobj.google_skip);

seturlpar("targeting",winobj.google_targeting);

var n=winobj.google_ad_client;

if(!k[n]){

k[n]=1;

k.length+=1

}else{

k[n]+=1

}

if(i[googlead_region]){

seturlnnpar("prev_fmts",i[googlead_region].tolowercase());

if(k.length>1){

seturlpar("slot",k[n])

}

}

if(j){

seturlnnpar("format",j.tolowercase());

if(i[googlead_region]){

i[googlead_region]=i[googlead_region]+","+j

}else{

i[googlead_region]=j

}

}

seturlpar("num_ads",winobj.google_max_num_ads);

seturlpar("output",winobj.google_ad_output);

seturlpar("adtest",winobj.google_adtest);

if(winobj.google_ad_channel){

var r=winobj.google_ad_channel;

seturlnnpar("channel",r);

var s="",t=r.split("+");

for(var o=0;o<t.length;o++){

var p=t[o];

if(!w[p]){

w[p]=1

}else{

s+=p+"+"

}

}

seturlnnpar("pv_ch",s)

}

seturlnnpar("url",winobj.google_page_url);

setcolpar("bg",winobj.google_color_bg,e);

setcolpar("text",winobj.google_color_text,e);

setcolpar("link",winobj.google_color_link,e);

setcolpar("url",winobj.google_color_url,e);

setcolpar("border",winobj.google_color_border,e);

setcolpar("line",winobj.google_color_line,e);

seturlpar("kw_type",winobj.google_kw_type);

seturlnnpar("kw",winobj.google_kw);

seturlnnpar("contents",winobj.google_contents);

seturlpar("num_radlinks",winobj.google_num_radlinks);

seturlpar("max_radlink_len",winobj.google_max_radlink_len);

seturlpar("rl_filtering",winobj.google_rl_filtering);

seturlpar("rl_mode",winobj.google_rl_mode);

seturlpar("rt",winobj.google_rt);

seturlpar("ad_type",winobj.google_ad_type);

seturlpar("image_size",winobj.google_image_size);

seturlpar("region",winobj.google_ad_region);

seturlpar("feedback_link",winobj.google_feedback);

seturlnnpar("ref",winobj.google_referrer_url);

seturlnnpar("loc",winobj.google_page_location);

seturlpar("bid",winobj.google_bid);

seturlpar("cust_age",winobj.google_cust_age);

seturlpar("cust_gender",winobj.google_cust_gender);

seturlpar("cust_interests",winobj.google_cust_interests);

seturlpar("cust_id",winobj.google_cust_id);

seturlpar("cust_job",winobj.google_cust_job);

seturlpar("cust_u_url",winobj.google_cust_u_url);

seturlpar("cust_ch",winobj.google_cust_ch);

seturlpar("ed",winobj.google_ed);

if(z(winobj,docobj)&&docobj.body){

var u=docobj.body.scrollheight,v=docobj.body.clientheight;

if(v&&u){

seturlnnpar("cc",math.round(v*100/u))

}

}

setsysinfo(winobj,g);

writeggcode(winobj,docobj,winobj.google_ad_url);

reset(winobj);

}

/*

errorhandler()

*/

function errorhandler(b,a,d){

ggadsetup();

return true

}

/*

istopframe

*/

function istopframe(winobj,docobj){

return winobj.top.location==docobj.location

}

/*

isvalidggad

*/

function isvalidggad(winobj,docobj){

var d=docobj.documentelement;

if(istopframe(winobj,docobj))

return false;

if(winobj.google_ad_width&&winobj.google_ad_height){

var g=1,e=1;

if(winobj.innerheight){

g=winobj.innerwidth;

e=winobj.innerheight

}else if(d&&d.clientheight){

g=d.clientwidth;

e=d.clientheight

}else if(docobj.body){

g=docobj.body.clientwidth;

e=docobj.body.clientheight

}

if(e>2*winobj.google_ad_height||g>2*winobj.google_ad_width){

return false

}

}

return true

}

function ggadinit(){

var winobj=window,docobj=document,loc=docobj.location,refer=docobj.referrer,e=null;

winobj.google_org_error_handler=winobj.onerror;

winobj.onerror=errorhandler;

if(winobj.google_ad_frameborder==e){

winobj.google_ad_frameborder=0

}

if(winobj.google_ad_output==e){

winobj.google_ad_output="html"

}

if(winobj.google_ad_format==e&&winobj.google_ad_output=="html"){

winobj.google_ad_format=winobj.google_ad_width+"x"+winobj.google_ad_height

}

if(winobj.google_page_url==e){

winobj.google_page_url=refer;

if(!isvalidggad(winobj,docobj)){

winobj.google_page_url=loc;

winobj.google_last_modified_time=date.parse(docobj.lastmodified)/1000;

winobj.google_referrer_url=refer

}

}else{

winobj.google_page_location=refer;

if(!isvalidggad(winobj,docobj)){

winobj.google_page_location=loc

}

}

if(winobj.google_num_slots_by_channel==e){

winobj.google_num_slots_by_channel=[]

}

if(winobj.google_num_slots_by_client==e){

winobj.google_num_slots_by_client=[]

}

if(winobj.google_prev_ad_formats_by_region==e){

winobj.google_prev_ad_formats_by_region=[]

}

}

ggadinit();

ggadsetup();

})()

(function(){

var h={google_ad_channel:"channel",google_ad_host:"host",google_ad_region:"region",google_ad_section:"region",google_ad_type:"ad_type",google_adtest:"adtest",google_alternate_ad_url:"alternate_ad_url",google_alternate_color:"alt_color",google_bid:"bid",google_city:"gcs",google_color_bg:"color_bg",google_color_border:"color_border",google_color_line:"color_line",google_color_link:"color_link",google_color_text:"color_text",google_color_url:"color_url",google_contents:"contents",google_country:"gl",

google_cust_age:"cust_age",google_cust_ch:"cust_ch",google_cust_gender:"cust_gender",google_cust_id:"cust_id",google_cust_interests:"cust_interests",google_cust_job:"cust_job",google_cust_l:"cust_l",google_cust_lh:"cust_lh",google_cust_u_url:"cust_u_url",google_disable_video_autoplay:"disable_video_autoplay",google_ed:"ed",google_encoding:"oe",google_feedback:"feedback_link",google_flash_version:"flash",google_gl:"gl",google_hints:"hints",google_kw:"kw",google_kw_type:"kw_type",google_language:"hl",

google_referrer_url:"ref",google_region:"gr",google_reuse_colors:"reuse_colors",google_safe:"adsafe",google_targeting:"targeting",google_ui_features:"ui"},m={google_ad_format:"format",google_ad_output:"output",google_ad_callback:"callback",google_ad_override:"google_ad_override",google_ad_slot:"slotname",google_analytics_webpropids:"ga_wpids",google_correlator:"correlator",google_cpa_choice:"cpa_choice",google_image_size:"image_size",google_last_modified_time:"lmt",google_max_num_ads:"num_ads",google_max_radlink_len:"max_radlink_len",

google_num_radlinks:"num_radlinks",google_num_radlinks_per_unit:"num_radlinks_per_unit",google_only_ads_with_video:"only_ads_with_video",google_page_location:"loc",google_page_url:"url",google_rl_dest_url:"rl_dest_url",google_rl_filtering:"rl_filtering",google_rl_mode:"rl_mode",google_rt:"rt",google_skip:"skip"};function n(b){return h[b]||m[b]||null}var u=document;function w(){var b=u.cookie,a=Math.round((new Date).getTime()/1000),c=b.indexOf("__utma=")>-1,e=b.indexOf("__utmb=")>-1,d=b.indexOf("__utmc=")>

-1,f,g={};if(c){f=b.split("__utma=")[1].split(";")[0].split(".");g.sid=(!e||!d?a:f[4])+"";g.vid=f[1]+"."+f[2];g.from_cookie=true}else{g.sid=window&&window.gaGlobal&&window.gaGlobal.sid?window.gaGlobal.sid:a+"";g.vid=window&&window.gaGlobal&&window.gaGlobal.vid?window.gaGlobal.vid:Math.round(Math.random()*2147483647)+"."+a;g.from_cookie=false}g.hid=window&&window.gaGlobal&&window.gaGlobal.hid?window.gaGlobal.hid:Math.round(Math.random()*2147483647);window.gaGlobal=g;return g}(function(){function b(){}

b.prototype.l=function(e){var d=e.indexOf("#")+1;return d?e.substr(d):""};b.prototype.n=function(e){return/[&<>\"]/.test(e)?e.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/>/g,"&gt;").replace(/\"/g,"&quot;"):e};b.prototype.b=function(e){var d="<iframe";for(var f in e){d+=" "+f+'="'+this.n(e[f])+'"'}return d+"></iframe>"};b.prototype.m=function(e,d){try{return e.frames[d]}catch(f){return null}};b.prototype.e=function(e){var d=document.createElement("iframe");for(var f in e){d.setAttribute(f,

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