![delimiter [difference]
12年6月14日星期四 6](https://image.slidesharecdn.com/rdsshttpshuier-120614063701-phpapp02/85/difference-between-query-string-and-hash-6-320.jpg)
![url encoding[difference]
12年6月14日星期四 8](https://image.slidesharecdn.com/rdsshttpshuier-120614063701-phpapp02/85/difference-between-query-string-and-hash-8-320.jpg)
![depended object [difference]
12年6月14日星期四 9](https://image.slidesharecdn.com/rdsshttpshuier-120614063701-phpapp02/85/difference-between-query-string-and-hash-9-320.jpg)
![evaluated object [difference]
12年6月14日星期四 11](https://image.slidesharecdn.com/rdsshttpshuier-120614063701-phpapp02/85/difference-between-query-string-and-hash-11-320.jpg)
![– examples:
• kissy, mvc, router
• Gmail uses a single URL for almost every interface – mail boxes,
individual mails, search results, settings – the fragment is used to
make these interfaces directly linkable.[6]
• Adobe Flash websites can use the fragment part to inform the user
about the state of the website or web application, and to facilitate
• deep linking, commonly with the help of the SWFAddress JavaScript
library.
• Other websites use the fragment part to pass some extra information
to scripts running on them – for example, Google Video understands
permalinks in the format of #01h25m30s to start playing at the
specified position,[7] and YouTube uses similar code such as
#t=3m25s.[8] A format of #t=10,20 for a section of media from 10
to 20 seconds is proposed in the Media Fragments URI 1.0 W3C
Working Draft.[9]
12年6月14日星期四 19](https://image.slidesharecdn.com/rdsshttpshuier-120614063701-phpapp02/85/difference-between-query-string-and-hash-19-320.jpg)
difference between query string and hash
- 1. DIFFERENCE BETWEEN QUERY STRING & HASH 12年6月14日星期四 1
- 2. In JavaScript, the fragment identifier of the current HTML or XHTML page can be accessed in the "hash" property location.hash 12年6月14日星期四 2
- 3. Common 12年6月14日星期四 3
- 4. • They are both the part of a Uniform Resource Locator (URL) – http://server/path/program?query_string#fragment_identifier Refer: http://en.wikipedia.org/wiki/Query_string 4 12年6月14日星期四 4
- 7. • query string: & = ; ? # – ? #: separator and not part of the query string – & =: separator and part of the query string – field1=value1&field2=value2&field3=value3... • fragment identifier : # – #: separator and part of the fragment identifiers Refer: http://en.wikipedia.org/wiki/Query_string 12年6月14日星期四 7
- 10. • Query string depend on the URI scheme – e.g., http: supports queries unlike ftp:. • Fragment identifier depend on the document MIME type – with different mine type, its effect is different. – for MIME text/html pages such as http://www.example.org/ foo.html#bar the fragment refers to the element with id="bar". – for MIME text/plain , http://example.com/ document.txt#line=10,20 , this example identifies lines 11 through 20 of a text document: – for MIME application/pdf, http://example.org/doc.pdf#page=35 will cause Adobe Reader to open the PDF and scroll to page 35 Refer: http://en.wikipedia.org/wiki/Query_string 10 12年6月14日星期四 10
- 12. • Query string is evaluated by the server • Fragment identifier is evaluated by the client (Web browser). • url hash不会发送至服务端 • url hash的变更不会引起网络请求 12 12年6月14日星期四 12
- 13. use 12年6月14日星期四 13
- 14. • query string: – can be used to contain the content of an HTML form – tracking: be passed to the program which generates the web page. • <a href="frank.html?e0a72cb2a2c7">see my page!</a> • <a href="ciccio.html?e0a72cb2a2c7">mine is better</ a> Refer: http://en.wikipedia.org/wiki/Query_string 12年6月14日星期四 14
- 15. • fragment identifiers: – refers to a resource that is subordinate to another, primary resource. The primary resource is identified by a Uniform Resource Identifier (URI), and the fragment identifier points to the subordinate resource. – eg: typically used to identify a portion of that document. – With the rise of AJAX, some websites use fragment identifiers to emulate the back button behavior of browsers for page changes that do not require a reload, or to emulate subpages. – process: first, use hash to memorize the page content change; second, use js to analyze the value of hash Refer: http://en.wikipedia.org/wiki/Fragment_identifier 12年6月14日星期四 15
- 16. • cross-domain pass parameters – iframe adaptive height problem when cross domain – get img url when cross domain 12年6月14日星期四 16
- 17. function setHash(a){ ! $.browser.msie?$.locationHash(a):location.hash=a; } $(window).hashchange(function(){ ! doHash(); }); function doHash(){ ! var h = location.hash; switch (h) { case "#ajax1": ajaxFn1(); break; case "#ajax2": ajaxFn2(); break; default: $("#ajax").html("哈哈，hash没有啦！"); } } function ajaxFn1(){ ! $("#ajax").load("hi.txt", function(){ ! ! setHash("#ajax1"); ! }); } function ajaxFn2(){ ! $.get("hi.html", function(t){ ! ! $("#ajax").html(t); ! ! setHash("#ajax2"); ! }); } 12年6月14日星期四 17
- 18. • apply kissy mvc router in shop category manager – url: siteadmin.daily.taobao.net/category/ auction.htm?sid=12203#!search?catId=-1 – why use #! ? It is suggest by google – refer: support.google.com/webmasters/bin/ answer.py?hl=en&answer=174992 12年6月14日星期四 18
- 19. – examples: • kissy, mvc, router • Gmail uses a single URL for almost every interface – mail boxes, individual mails, search results, settings – the fragment is used to make these interfaces directly linkable.[6] • Adobe Flash websites can use the fragment part to inform the user about the state of the website or web application, and to facilitate • deep linking, commonly with the help of the SWFAddress JavaScript library. • Other websites use the fragment part to pass some extra information to scripts running on them – for example, Google Video understands permalinks in the format of #01h25m30s to start playing at the specified position,[7] and YouTube uses similar code such as #t=3m25s.[8] A format of #t=10,20 for a section of media from 10 to 20 seconds is proposed in the Media Fragments URI 1.0 W3C Working Draft.[9] 12年6月14日星期四 19
- 20. does url length has impact on page load speed? 12年6月14日星期四 20
- 21. 第一等级的优化，70字节 如何计算的呢？ 21 12年6月14日星期四 21
- 22. Refer: http://blog.csdn.net/aimingoo/article/details/6081964 - ncz 22 12年6月14日星期四 22
- 23. what http header include? 23 12年6月14日星期四 23
- 24. • http 请求头部信息 12年6月14日星期四 24
- 25. • 资源文件的get请求http头部的最大长度是496字节 • http头部包含两大部分： ★ 可缺省的: 占 184字节 ★ 必须的：占496－184 ＝ 312字节， 包含：get , user-agent, cookie ‣ 其中cookie可被缓存，所以相当与长度为0字节 ‣ user-agent的长度在214字节左右 ‣ 故剩下get部分的长度 = 496-214-78个字节 • 这么做的效果：当我们总是从浏览器端发出最小化的HTTP请求时，网络总是可以最快速的将请求提 交到服务器，无需等待多个包并组合。这在慢速网络，以及存在大量丢包的网络中效果将为极为明 显。简单地说，如果有人在局域网中用迅雷或BT，那么最小化HTTP请求将会使网页的浏览体验提升 得相当相当明显。 Refer: http://blog.csdn.net/aimingoo/article/details/6081964 - ncz 12年6月14日星期四 25
- 26. use 12年6月14日星期四 26
- 27. • But with 78 bytes url， what we can do is very little. One common url is longer than this length. • eg: http://assets.daily.taobao.net/apps/taesite/platinum/ scripts/common/mods/shop/custom-banner/custom- banner.js (109 bytes) 12年6月14日星期四 27