在android的gmail面前都是浮云

posted by wap, platform: Android

引用:

原帖由 @hudihutian  于 2010-12-20 18:25 发表
每个人都一直在线，基站能吃得消吗？

能占多少资源。

引用:

原帖由 leedsun 于 2010-12-20 21:27 发表
push简单的说就跟短信一样，发过来后由运营商经过处理发送给你——送
IP的那个不能算严格意义的push，因为是机器本身通过网络间断的联线取得邮件——拿

ip和android的push都是推送。谢谢，不懂别瞎说。
长连接技术。就是为了让服务器能推送数据到客户机。
这种技术手段普及在各个地方了。
你上gmail里的gtalk就用了长连接技术。
包括软件如电骡，qq，包括很多网游。
长连接早就是成熟的技术了。
这些全是服务器推送到客户端的。
日常生活一直在push。

[ 本帖最后由 cc0128 于 2010-12-21 10:40 编辑 ]

维基百科英文版
Push technology(redirect from HTTP Streaming)： http://en.wikipedia.org/wiki/Push_technology
Comet：（一种长连接web应用）  http://en.wikipedia.org/wiki/Comet_(programming)

截取部分
HTTP server push
HTTP server push (also known as HTTP streaming) is a mechanism for sending data from a web server to a web browser. HTTP server push can be achieved through several mechanisms.
Generally the web server does not terminate a connection after response data has been served to a client. The web server leaves the connection open such that if an event is received, it can immediately be sent to one or multiple clients. Otherwise the data would have to be queued until the client's next request is received. Most web servers offer this functionality via CGI (e.g. Non-Parsed Headers scripts on Apache).
Another mechanism is related to a special MIME type called multipart/x-mixed-replace, which was introduced by Netscape in 1995. Web browsers would interpret this as a document changing whenever the server felt like pushing a new version to the client.[1][2] It is still supported by Firefox, Opera and Safari today, but traditionally ignored by Microsoft.[3] It can be applied to HTML documents, but also for streaming images in webcam applications.
The WHATWG Web Applications 1.0 proposal[4] included a mechanism to push content to the client. On September 1, 2006, the Opera web browser implemented this new experimental technology in a feature called "Server-Sent Events."[5][6] It is now being standardized as part of HTML5.[7] Another related part of HTML5 is the WebSockets API, which allows a web server and client to communicate over a full-duplex TCP connection.