Re: some adjustment suggestions for the blog garden URL, the second-level domain name is not conducive to the client browser cache

The second-level domain name mechanism is not conducive to the search engine's
I have heard a sigh. So far, my blog has only been indexed on the homepage by Google,ArticleI did not accept one. Of course, the article was not accepted.
The reason for the record is mainly because I have a short period of time (only one week) in the blog garden, and there are not many articles.

Next I will talk about the cache policy of IE browser in the case of second-level domain names.
1. For website optimization, Cache Optimization is the most important part. For some commonly used. static files and
Data (mainly JS, CSS, JPG, GIF, and static html) should be cached once,
When you access the server again next time, you can retrieve it from the client cache instead of reading it from the server over the Internet.

Fortunately:
Browsers are very smart. They automatically cache static images, JS files, and CSS files.
ProgramMembers are smarter. They will tell the browser that they are prohibited from caching those dynamic data files, such as test. asp? Action = Update & id = 1.

Unfortunately:
1. When the browser caches resources, It accesses the resources according to absolute paths such as (http.
So for the following file: headerbg.jpg
If you access my blog via http://www.cnblogs.com/ashun/, the browser will cache the following address:
Http://www.cnblogs.com/Skins/KJC/Images/HeaderBg.jpg
But if you visit my blog via http://ashun.cnblogs.com,
The browser has no idea that the cache contains the headerbg.jpg file.
Or re-read the file from the server over the Internet and cache the following address:
Http://ashun.cnblogs.com/Skins/KJC/Images/HeaderBg.jpg

In the browser's eyes, www.cnblogs.com/ashun and ashun.cnblogs.com are two different websites, and the files are considered to be different files.
Files in the cache are accessed through absolute channels.

Let's analyze the real data.
I visited http://ashun.cnblogs.com/http://www.cnblogs.com/ashun/ http://www.cnblogs.com/cathsfz/ in turn

Line	Started	Starteddatetime	Size	Result	URL
1	00:00:00. 000	2006-dec-04 06:48:04. 532	54524	200	Http://ashun.cnblogs.com/
2	00:00:01. 444	2006-dec-04 06:48:05. 976	7539	200	Http://ashun.cnblogs.com/Skins/KJC/style.css
3	00:00:02. 065	2006-dec-04 06:48:06. 597	824	200	Http://www.cnblogs.com/ashun/customcss.aspx
4	00:00:02. 457	2006-dec-04 06:48:06. 989	18479	200	Http://ashun.cnblogs.com/Skins/KJC/Images/HeaderBg.jpg
5	00:00:02. 466	2006-dec-04 06:48:06. 998	653	200	Http://images.cnblogs.com/xml.gif
6	00:00:02. 521	2006-dec-04 06:48:07. 053	396	200	Http://ashun.cnblogs.com/Skins/KJC/images/SubHeaderBg.gif
7	00:00:02. 605	2006-dec-04 06:48:07. 137	1097	200	Http://ashun.cnblogs.com/Skins/KJC/Images/icon-group.jpg
8	00:00:02. 648	2006-dec-04 06:48:07. 180	4004	200	Http://images.cnblogs.com/cnblogs_com/ashun/77221/t_lishun.JPG
9	00:00:02. 695	2006-dec-04 06:48:07. 227	0	(Cache)	Http://ashun.cnblogs.com/
10	00:00:02. 928	2006-dec-04 06:48:07. 460	378	200	Http://ashun.cnblogs.com/Skins/KJC/Images/xmlsmall.gif
11	00:00:03. 025	2006-dec-04 06:48:07. 557	653	200	Http://ashun.cnblogs.com/images/xml.gif
12	00:00:03. 324	2006-dec-04 06:48:07. 856	1000	200	Http://www.cnblogs.com/ashun/images/icon-titledoc.gif
13	00:00:05. 081	2006-dec-04 06:48:09. 613	2843	200	Http://ashun.cnblogs.com/script/ShowHidden.js
14	00:00:05. 629	2006-dec-04 06:48:10. 161	397	200	Http://ashun.cnblogs.com/Skins/KJC/images/ColumnHeaderBg.gif
15	00:00:25. 166	2006-dec-04 06:48:29. 698	54517	200	Http://www.cnblogs.com/ashun
16	00:00:25. 951	2006-dec-04 06:48:30. 483	7539	200	Http://www.cnblogs.com/Skins/KJC/style.css
17	00:00:26. 470	2006-dec-04 06:48:31. 002	0	(Cache)	Http://www.cnblogs.com/ashun/customcss.aspx
18	00:00:26. 486	2006-dec-04 06:48:31. 018	18479	200	Http://www.cnblogs.com/Skins/KJC/Images/HeaderBg.jpg
19	00:00:26. 553	2006-dec-04 06:48:31. 085	396	200	Http://www.cnblogs.com/Skins/KJC/images/SubHeaderBg.gif
20	00:00:26. 630	2006-dec-04 06:48:31. 162	1097	200	Http://www.cnblogs.com/Skins/KJC/Images/icon-group.jpg
21	00:00:26. 641	2006-dec-04 06:48:31. 173	1000	200	Http://www.cnblogs.com/
22	00:00:26. 676	2006-dec-04 06:48:31. 208	378	200	Http://www.cnblogs.com/Skins/KJC/Images/xmlsmall.gif
23	00:00:27. 182	2006-dec-04 06:48:31. 714	1000	200	Http://www.cnblogs.com/ashun/images/icon-titledoc.gif
24	00:00:28. 471	2006-dec-04 06:48:33. 003	2843	200	Http://www.cnblogs.com/script/ShowHidden.js
25	00:00:29. 252	2006-dec-04 06:48:33. 784	397	200	Http://www.cnblogs.com/Skins/KJC/images/ColumnHeaderBg.gif
26	00:00:42. 287	2006-dec-04 06:48:46. 819	58979	200	Http://www.cnblogs.com/cathsfz/
27	00:00:42. 910	2006-dec-04 06:48:47. 442	0	(Cache)	Http://www.cnblogs.com/Skins/KJC/style.css
28	00:00:43. 099	2006-dec-04 06:48:47. 631	509	200	Http://www.cnblogs.com/cathsfz/customcss.aspx
29	00:00:43. 350	2006-dec-04 06:48:47. 882	0	(Cache)	Http://www.cnblogs.com/Skins/KJC/Images/HeaderBg.jpg
30	00:00:43. 667	2006-dec-04 06:48:48. 199	3238	200	Http://www.copyblogger.com/wp-content/themes/copyblogger_20/images/rss.gif
31	00:00:43. 988	2006-dec-04 06:48:48. 520	1198	200	Http://www.cnblogs.com/Skins/KJC/images/icon-titledoc.gif
32	00:00:46. 854	2006-dec-04 06:48:51. 386	0	(Cache)	Http://www.cnblogs.com/script/ShowHidden.js

 
Note:
Size is the file size. If it is 0, it indicates the read cache.
If the result is 200, it indicates that the server is read, or (cache) or 304 indicates that the cache is read.

We can see that access to different second-level domain names, almost all images and JS are re-requested, even though they are the same file.

If there are so many blogs in the blog Park, you only need to read these resources once if you visit the blogs of everyone.
Client browsing speed is very helpful.

Solution:
Use a uniform absolute address to access resources.

Example:
CSS file:
Background-image: URL (skins/KJC/images/test.gif)
==>
Background-image: URL (http://www.cnblogs.com/skins/kjc/images/test.gif)

HTML file:
<SCRIPT src = "test. js"> </SCRIPT>
<Link id = "maincss" type = "text/CSS" rel = "stylesheet" href = "/skins/KJC/style.css"/>
==>
<SCRIPT src = "http://www.cnblogs.com/test.js"> </SCRIPT>
<Link id = "maincss" type = "text/CSS" rel = "stylesheet" href = "http://www.cnblogs.com/Skins/KJC/style.css"/>

JS file:
VaR IMG = new image ()
IMG. src = "go_rush.gif"

==>
VaR IMG = new image ()
IMG. src = "http://www.cnblogs.com/go_rush.gif"

Next program preview:
How does one disable the browser and delete the client cache? For dynamic pages, ASP and PHP users may all know that cache is controlled through http-header.
For static files (gif.jpg, CSS, JS), how can this problem be solved ?... Please pay attention to the upcoming highlights