pushlet 之 XMLAdapter 适配器

近日有人咨询Pushlet XMLAdapter 适配器的问题,我特留意了一下
到官方看了一下http://www.pushlets.com/Development Roadmap中最后面说到了这个问题,AJAX (XMLHttpRequest) Support
使用AJAX (XMLHttpRequest)的好处就是:

cleaner and thinner client-side lib
no issues with "busy" indicators
pure XML data exchange (i.s.o. JavaScript callbacks)

 
英文不好就不再翻译了

但是要注意的是:

no universal support for XMLHttpRequest on all browsers (can be emulated in various ways though)
event streaming can only be emulated in Mozilla (using readystate == 3 and accessing partly received content)
from this follows that only pull-mode can be conducted

 

这里必须说一下:
1不是所有浏览器都支持
2流模式只是在火狐上支持
3只能使用PULL模式

然后:

Done. Since version 2.0.2 Pushlets support AJAX in "pull"-mode with format="xml-strict". An AJAX JS client library (ajax-pushlet-client.js) is available
注意三点:
1:版本2.0.2
2:模式pull
3:格式xml-strict
4:文件ajax-pushlet-client.js

 

其实Pushlet官方也是有示例的
demos - Pushlets - AJAX
点击后运行可以看到,服务端返回的内容为,请结合上面4点看:

p_event=join-listen-ack
p_mode=pull
p_time=1380021729
p_id=qabynopuvu
p_format=xml-strict
p_sid=vyrel

 

然后打开页面源码看,其引用的文件:
<script type="text/javascript" src="../../lib/ajax-pushlet-client.js"></script>
如果打开ajax-pushlet-client.js看一下,可以看到:

NV_P_FORMAT: 'p_format=xml-strict'

 

也就是说默认就是xml-strict

所以,参考此示例,就可以组织自己XMLHttpRequest适配下的应用了

 

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