Duplex Web Service possible ?

[Richard Roylance]

Hi,

 

Is it possible to host a duplex web service on GAE ?

 

Basically I am wanting to have a mobile app and a desktop app that will message each other through a duplex web service. I currently have this working using a TCP socket connection, but obviously this will not work unless the 2 devices are on the same network. That is why i need to make a duplex web servioce to facilitate the communication.

 

Thanks.

[Barry Hunter]

Not really. AppEngine basically uses a 'request/responce' method.
basically CGI http://www.w3.org/CGI/

AppEngine can't keep connections open. Its designed for HTTP requests

There is the ChannelAPI, which makes persistant connections possible
(using long-polling?) but doesnt sound suitable (its still HTTP).

xmpp directly might be useful as a communication medium. I dont really
know much about it. Perhaps you can use it without involving
AppEngine. Or AppEngine could be a 'controller' or a 'mediator' so
that devices can find each other.

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[bFlood]

how about http://www.pubnub.com

On Jun 14, 10:53 am, Barry Hunter <barrybhun...@gmail.com> wrote:
> Not really. AppEngine basically uses a 'request/responce' method.

> basically CGIhttp://www.w3.org/CGI/

[Nick Johnson (Google)]

What is a "duplex web service"?

-Nick

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[Branko Vukelic]

On Tue, Jun 14, 2011 at 4:53 PM, Barry Hunter <barryb...@gmail.com> wrote:
> xmpp directly might be useful as a communication medium. I dont really
> know much about it. Perhaps you can use it without involving
> AppEngine. Or AppEngine could be a 'controller' or a 'mediator' so
> that devices can find each other.

As far as I know, XMPP is capable of transmitting and receiving any
structured data in the form of XML. I've seen it used in applications
that need collaborative editing (Inkscape, NetBeans), so I'm guessing
it's not limited to text chat.

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[Calvin]

I'll second this.  My experiments with PubNub were very promising.

[bFlood]

plus they got this great video :)

http://bitly.com/lkF5Ff

[RR]

Thanks for all the replies guys, ill look into pubnub, it looks promising.

[Calvin Spealman]

Have you looked at the Channel API?

http://code.google.com/appengine/docs/python/channel/overview.html

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[RR]

I have actually recieved a server to host this on, so i will not need GAE. Thanks anyway though, will keep in mind for future projects.