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Recently, 1 yuan shopping compared to the fire, this crowdfunding form of shopping, the buyer at a very small cost, you can get a favorite items. Some people say it is a scam, and there are people who are flocking to shopping on it every day, here do not comment. NetEase also do this mode, the name is 1 Yuan Cloud purchase, 1 Yuan treasure.

NetEase Cloud Purchase www.1yyg.com site on the top of a cumulative number of participants in the statistics, this is more curious, think of a time period to participate in the changes in the number of participants.

　　

Open the site, load the page, open debugging, view the network, and note the repeated requests:

The above-mentioned request is constantly sent, and the real-time changes on the Web page accumulate statistics on the number of participants, so that the request is determined.

After opening the URL for this request:

This is obviously a jsonp, so try to get it on the webpage, every 1s clock is displayed:

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd "> li{list-style-Type:none;} </style> &LT;TITLE&GT;JSONP Test Example </title> <script src= "Http://apps.bdimg.com/libs/jquery/2.1.1/jquer Y.js "></script> <script type=" Text/javascript ">jQuery (document). Ready (function(){      //defining the GetData () function        functionGetData () {$.ajax ({type:"Get", Async:false, URL:"Http://api.1yyg.com/JPData?action=totalBuyCount", DataType:"Jsonp", Jsonp:"Fun", Jsonpcallback:"Jsonp", Success:function(data) {varhtml = ' '; HTML+ = ' <li> ' +data[' count ']+ ' </li> '; $("#remote"). append (HTML); }, Error:function() {alert (' Fail ');            }             }); } setinterval (GetData,1000);//executes the GetData function every second.      }); </script> The remote data is as follows:<br/> <div id= "remote" ></div> </body> 
Effect:
　　
You can find the rules, not 5 minutes in the background update.
Of course, you can use Java to crawl the Web page in this data way.
　　
Package Worktest;import Java.io.file;import java.io.filewriter;import java.io.ioexception;import Java.net.URL; Import Java.text.simpledateformat;import java.util.date;import Java.util.scanner;import Java.util.Timer;import      Java.util.timertask;public class TaskDemo1 {public static void main (String [] args) {timertask task = new TimerTask () {        @Override public void Run () {fn ();      SYSTEM.OUT.PRINTLN ("Hello!!!");  }    };  Long delay = 0;  Long Period = 60 * 1000;  Timer timer = new timer (); Timer.scheduleatfixedrate (task, delay, Period);} public static void Fn () {File File = new file ("E:\\data\\data.txt"); FileWriter FW = NULL; String str = NULL; String s = null;  SimpleDateFormat df = new SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss");//Set date format string S1 = Df.format (new date ()) + ""; try {URL url = new URL ("http://api.1yyg.com/JPData?action=totalBuyCount&fun=jsonp1456738798703&_=1456738803768"); Scanner in = new Scanner (Url.openstream ()), while (In.hasnextline ()) {str = iN.nextline (); string[] S2 =str.split (":"); string[] S3 = S2[2].split (","); String s4 = s3[0]; s = S1 +s4+ "\ r \ n";} FW = new FileWriter (file, True); Fw.write (s);} catch (Exception e) {System.out.println (e.tostring ()),} finally {if (fw! = null) try {fw.close ();} catch (IOException e) {T Hrow New RuntimeException ("Shutdown failed! ");}}}}
After the data has been obtained, it can be analyzed.
If there is a violation of the 1 Yuan Cloud purchase, please contact me, I will promptly delete!
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