events {

worker_connections  1024;

}

http {

include       mime.types;

default_type  application/octet-stream;

log_format tick “$msec^A$remote_addr^A$u_domain^A$u_url^A$u_title^A$u_referrer^A$u_sh^A$u_sw^A$u_cd^A$u_lang^A$http_user_agent^A$u_utrace^A$u_account”;

access_log  logs/access.log  tick;

sendfile        on;

keepalive_timeout  65;

server {

listen       80;

server_name  localhost;

location /1.gif {

#伪装成gif文件

default_type image/gif;

#本身关闭access_log，通过subrequest记录log

access_log off;

access_by_lua ”

— 用户跟踪cookie名为__utrace

local uid = ngx.var.cookie___utrace

if not uid then

— 如果没有则生成一个跟踪cookie，算法为md5(时间戳+IP+客户端信息)

uid = ngx.md5(ngx.now() .. ngx.var.remote_addr .. ngx.var.http_user_agent)

end

ngx.header[‘Set-Cookie’] = {‘__utrace=’ .. uid .. ‘; path=/’}

if ngx.var.arg_domain then

— 通过subrequest到/i-log记录日志，将参数和用户跟踪cookie带过去

ngx.location.capture(‘/i-log?’ .. ngx.var.args .. ‘&utrace=’ .. uid)

end

“;

#此请求不缓存

add_header Expires “Fri, 01 Jan 1980 00:00:00 GMT”;

add_header Pragma “no-cache”;

add_header Cache-Control “no-cache, max-age=0, must-revalidate”;

#返回一个1×1的空gif图片

empty_gif;

}

location /i-log {

#内部location，不允许外部直接访问

internal;

#设置变量，注意需要unescape

set_unescape_uri $u_domain $arg_domain;

set_unescape_uri $u_url $arg_url;

set_unescape_uri $u_title $arg_title;

set_unescape_uri $u_referrer $arg_referrer;

set_unescape_uri $u_sh $arg_sh;

set_unescape_uri $u_sw $arg_sw;

set_unescape_uri $u_cd $arg_cd;

set_unescape_uri $u_lang $arg_lang;

set_unescape_uri $u_utrace $arg_utrace;

set_unescape_uri $u_account $arg_account;

#打开日志

log_subrequest on;

#记录日志到ma.log，实际应用中最好加buffer，格式为tick

access_log /var/nginx_logs/ma.log tick;

#输出空字符串

echo ”;

}

}

}

var params = {};

//Document对象数据

if(document) {

params.domain = document.domain || ”;

params.url = document.URL || ”;

params.title = document.title || ”;

params.referrer = document.referrer || ”;

}

//Window对象数据

if(window && window.screen) {

params.sh = window.screen.height || 0;

params.sw = window.screen.width || 0;

params.cd = window.screen.colorDepth || 0;

}

//navigator对象数据

if(navigator) {

params.lang = navigator.language || ”;

}

//解析_maq配置

if(_maq) {

for(var i in _maq) {

switch(_maq[i][0]) {

case ‘_setAccount’:

params.account = _maq[i][1];

break;

default:

break;

}

}

}

//拼接参数串

var args = ”;

for(var i in params) {

if(args != ”) {

args += ‘&’;

}

args += i + ‘=’ + encodeURIComponent(params[i]);

}

//通过Image对象请求后端脚本

var img = new Image(1, 1);

img.src = ‘http://xxx.xxx.xxx.xxx/log.gif?’ + args;

})();

var _maq = _maq || [];

_maq.push([‘_setAccount’, ‘zx5352’]);

(function() {

var ma = document.createElement(‘script’);

ma.type = ‘text/javascript’;

ma.async = true;

ma.src = ‘http://xxx.xxx.xxx.xxx/ma.js’;

var s = document.getElementsByTagName(‘script’)[0];

s.parentNode.insertBefore(ma, s);

})();

</script>