JS pushlet XMLAdapter介面卡用法案例解析
近日有人諮詢Pushlet XMLAdapter 介面卡的問題,我特留意了一下
到官方看了一下http://www.pushlets.com/,Development Roadmap中最後面說到了這個問題,AJAX (XMLHttpRequest) Support
使用AJAX (XMLHttpRequest)的好處就是:
cleaner and thinner client-side lib
no issues with "busy" indicators
pure XML data exchange (i.s.o. JavaScript callbacks)
英文不好就不再翻譯了
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
這裡必須說一下:
1不是所有瀏覽器都支援
2流模式只是在火狐上支援
3只能使用PULL模式
然後:
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
注意三點:
1:版本2.0.2
2:模式pull
3:格式xml-strict
4:檔案ajax-pushlet-client.js
其實Pushlet官方也是有示例的
demos - Pushlets - AJAX
點選後執行可以看到,服務端返回的內容為,請結合上面4點看:
p_event=join-listen-ack
p_mode=pull
p_time=1380021729
p_id=qabynopuvu
p_format=xml-strict
p_sid=vyrel
然後開啟頁面原始碼看,其引用的檔案:
<script type="text/javascript" src="../../lib/ajax-pushlet-client.js"></script>
如果開啟ajax-pushlet-client.js看一下,可以看到:
NV_P_FORMAT: 'p_format=xml-strict'
也就是說預設就是xml-strict
所以,參考此示例,就可以組織自己XMLHttpRequest適配下的應用了
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支援我們。