Chrome开发者工具里的一个隐藏技能:chrome://net-internals

During my holiday I was writing a small tool for fun, which extracts my personal posts from  http://www.  for further analysis. I am using AJAX in jQuery to perform a synchronous call to fetch html source code of given url specified by argument requestURL.、

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function getPostByAJAX(requestURL){
   var html = $.ajax({
    url: requestURL,
    async: false}).responseText; 
   return html;}

The requestURL I am using is  http:// tie http:// tb/error.html?ErrType=1 ” give me a reminder that this issue might be related to logon state of BAIDU website, since I would like to return my personal information, it makes sense that the url can only return personal data if cookie is available or user credential is specified ( not supported by BAIDU in this case ). In order to verify my assumption, I request the url directly in Chrome and check its request header fields this time, and yes, the cookie field is there:

So now the question is, how to send my cookie information together with the AJAX call in JavaScript code? I found  this article from Google. According to the article, I add the following code in my function:

And it works now:

By the way, via this tool I can also figure out how the jQuery library file jquery1.7.1.js stored in local laptop is loaded by Chrome. Chrome reads this file by chunks with size 32768 ( the file consists of 8 chunks ).

The total size 251661 matches exactly with the number I see in windows, perfect isn’t it?

Further reading

For more tips I gained during my daily work about Chrome development tools, please refer to this blog  Chrome Development Tool tips used in my daily work.

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