[asterisk-dev] Asterisk with socket.io

Discussion:

Vipul Rastogi

2015-01-21 02:36:57 UTC

Anybody tried asterisk connecting to Socket.io server as websocket client ?
I am not getting websocket established.

See below error, after successful 101 Switching Protocols

res_http_websocket.c:576 __ast_websocket_read: WebSocket unknown opcode 5

Dan Jenkins

2015-01-21 15:23:36 UTC

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Post by Vipul Rastogi
Anybody tried asterisk connecting to Socket.io server as websocket client
? I am not getting websocket established.
See below error, after successful 101 Switching Protocols
res_http_websocket.c:576 __ast_websocket_read: WebSocket unknown opcode 5
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Hi Vipul,

Socket.io won't work with the websocket module in Asterisk as Socket.io is
a layer on top of websockets/xhr polling/flash sockets.

Socket.io actually makes HTTP requests to the host you're trying to connect
to and the host needs to understand the "socket.io protocol" as such, this
sets up a socket.io session, gives back a list of available transports etc,
then with that response, the client sends a websocket request (or whatever
transport you select) with the socket.io sessionId etc.

So you can see why the normal websocket module in Asterisk can't deal with
this. You would need a socket.io module in Asterisk, which does exist, the
Respoke team use socket.io and so our Respoke channel driver uses the
socket.io transport -
https://github.com/respoke/chan_respoke/blob/master/include/asterisk/res_socket_io.h,
this module is released under GPLv2 Licensing.

Hope this helps you

Dan

Vipul Rastogi

2015-01-30 02:17:07 UTC

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Thanks Dan. Do you have any example file to suggest how to use it. I am
looking for code lines which I can use in our app to connect, send and
receive from Nodejs applications.

thanks in advance !

On Wed, Jan 21, 2015 at 2:36 AM, Vipul Rastogi <

Hi Vipul,
Socket.io won't work with the websocket module in Asterisk as Socket.io is
a layer on top of websockets/xhr polling/flash sockets.
Socket.io actually makes HTTP requests to the host you're trying to
connect to and the host needs to understand the "socket.io protocol" as
such, this sets up a socket.io session, gives back a list of available
transports etc, then with that response, the client sends a websocket
request (or whatever transport you select) with the socket.io sessionId
etc.
So you can see why the normal websocket module in Asterisk can't deal with
this. You would need a socket.io module in Asterisk, which does exist,
the Respoke team use socket.io and so our Respoke channel driver uses the
socket.io transport -
https://github.com/respoke/chan_respoke/blob/master/include/asterisk/res_socket_io.h,
this module is released under GPLv2 Licensing.
Hope this helps you
Dan
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Matthew Jordan

2015-01-30 15:55:19 UTC

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On Thu, Jan 29, 2015 at 8:17 PM, Vipul Rastogi

Post by Vipul Rastogi
Thanks Dan. Do you have any example file to suggest how to use it. I am
looking for code lines which I can use in our app to connect, send and
receive from Nodejs applications.

As Dan already pointed out, it is a module in an external repo, and is
not currently part of Asterisk. If you wanted to integrate a socket.io
transport with some API - say, for example, ARI - you'd have to do
that work yourself.

As it is, ARI does use WebSockets, and can be integrated quite well
with node.js already. If you're interested, a client library exists
for that purpose:

https://github.com/asterisk/node-ari-client
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Matthew Jordan
Digium, Inc. | Engineering Manager
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at: http://digium.com & http://asterisk.org

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Vipul Rastogi

2015-02-03 07:40:43 UTC

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Today, I got Asterisk working with respoke channel code as well but on
startup Asterisk connects (register=yes) with node.js server with HTTP GET
which does not have following headers...
Connection: Upgrade
Upgrade: websocket

hence http connection is not upgraded. Please suggest what to do. Attaching
my respoke.conf file.

Post by Matthew Jordan
On Thu, Jan 29, 2015 at 8:17 PM, Vipul Rastogi

As Dan already pointed out, it is a module in an external repo, and is
not currently part of Asterisk. If you wanted to integrate a socket.io
transport with some API - say, for example, ARI - you'd have to do
that work yourself.
As it is, ARI does use WebSockets, and can be integrated quite well
with node.js already. If you're interested, a client library exists
https://github.com/asterisk/node-ari-client
--
Matthew Jordan
Digium, Inc. | Engineering Manager
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at: http://digium.com & http://asterisk.org
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Dan Jenkins

2015-02-03 09:40:29 UTC

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Phil Mickelson

2015-01-21 15:29:36 UTC

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Vipul,

I found the exact same thing. Was unable to make it work so I use WS (
https://github.com/einaros/ws) for communicating with Asterisk. Works like
a champ.

I assume you're using node.js. If so, it can be installed with npm. And,
it doesn't interfere with socket.io which I use for communicating with the
client. Why? Because I had already started down that road and didn't want
to change. I use rooms in socket.io.

Phil Mickelson