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From samset at wanadoo.fr Wed Apr 22 22:56:01 2015
From: samset at wanadoo.fr (Samir Sow)
Date: Wed, 22 Apr 2015 22:56:01 +0200
Subject: [99s-extend] cowboy_websocket_handler
Message-ID: <[email protected]>
Hi there,
I would like to learn more about the cowboy_xxxx_handler for instance the cowboy_websocket_handler :
- is it an OTP gen_ instance ?
- how/where the websocket_handle() is called ?
- how websocket_info() relates to the Transport:send() operation and where/how this latter function is called?
I could not find the cowboy_websocket_handler behavior in the src dir. I guess i?ve missed something.
The code is clean but difficult to decipher by a erlang padawan like me.
Why do i need to understand this ?
I would like to write a generic tcp transport layer that provides an interface like the cowboy_xxx_handler to my protocol stack.
Of course i will use ranch underneath.
Neither the examples provided with ranch nor the ftp server tutorial reveals the sophisticated architecture used to handover data/context to the handler and to get reply data from the handler.
Thank you for your help.
Samir Sow
From essen at ninenines.eu Wed Apr 22 23:18:29 2015
From: essen at ninenines.eu (=?UTF-8?B?TG/Dr2MgSG9ndWlu?=)
Date: Thu, 23 Apr 2015 00:18:29 +0300
Subject: [99s-extend] cowboy_websocket_handler
In-Reply-To: <[email protected]>
References: <[email protected]>
Message-ID: <[email protected]>
Hello,
On 04/22/2015 11:56 PM, Samir Sow wrote:
> I would like to learn more about the cowboy_xxxx_handler for instance the cowboy_websocket_handler :
> - is it an OTP gen_ instance ?
> - how/where the websocket_handle() is called ?
> - how websocket_info() relates to the Transport:send() operation and where/how this latter function is called?
>
> I could not find the cowboy_websocket_handler behavior in the src dir. I guess i?ve missed something.
> The code is clean but difficult to decipher by a erlang padawan like me.
Presumably you are looking in master. cowboy_websocket does that in
master now. cowboy_websocket_handler is in Cowboy 1.0.
--
Lo?c Hoguin
http://ninenines.eu
From samset at wanadoo.fr Wed Apr 22 23:39:29 2015
From: samset at wanadoo.fr (Samir Sow)
Date: Wed, 22 Apr 2015 23:39:29 +0200
Subject: [99s-extend] cowboy_websocket_handler
In-Reply-To: <[email protected]>
References: <[email protected]>
<[email protected]>
Message-ID: <[email protected]>
Thanks.
Still i can?t figure out how you manage the data transmission from/to handler via the websocket_handle() and websocket_info() function.
Samir
> On 22 avr. 2015, at 23:18, Lo?c Hoguin <essen at ninenines.eu> wrote:
>
> Hello,
>
> On 04/22/2015 11:56 PM, Samir Sow wrote:
>> I would like to learn more about the cowboy_xxxx_handler for instance the cowboy_websocket_handler :
>> - is it an OTP gen_ instance ?
>> - how/where the websocket_handle() is called ?
>> - how websocket_info() relates to the Transport:send() operation and where/how this latter function is called?
>>
>> I could not find the cowboy_websocket_handler behavior in the src dir. I guess i?ve missed something.
>> The code is clean but difficult to decipher by a erlang padawan like me.
>
> Presumably you are looking in master. cowboy_websocket does that in master now. cowboy_websocket_handler is in Cowboy 1.0.
>
> --
> Lo?c Hoguin
> http://ninenines.eu
From essen at ninenines.eu Thu Apr 23 10:55:23 2015
From: essen at ninenines.eu (=?UTF-8?B?TG/Dr2MgSG9ndWlu?=)
Date: Thu, 23 Apr 2015 11:55:23 +0300
Subject: [99s-extend] cowboy_websocket_handler
In-Reply-To: <[email protected]>
References: <[email protected]>
<[email protected]>
<[email protected]>
Message-ID: <[email protected]>
It's a simple function call.
Assuming the variable Handler contains the name of the module, it's just
doing Handler:websocket_info(Info, Req, State) and then checks the
return value.
On 04/23/2015 12:39 AM, Samir Sow wrote:
> Thanks.
> Still i can?t figure out how you manage the data transmission from/to handler via the websocket_handle() and websocket_info() function.
>
> Samir
>
>> On 22 avr. 2015, at 23:18, Lo?c Hoguin <essen at ninenines.eu> wrote:
>>
>> Hello,
>>
>> On 04/22/2015 11:56 PM, Samir Sow wrote:
>>> I would like to learn more about the cowboy_xxxx_handler for instance the cowboy_websocket_handler :
>>> - is it an OTP gen_ instance ?
>>> - how/where the websocket_handle() is called ?
>>> - how websocket_info() relates to the Transport:send() operation and where/how this latter function is called?
>>>
>>> I could not find the cowboy_websocket_handler behavior in the src dir. I guess i?ve missed something.
>>> The code is clean but difficult to decipher by a erlang padawan like me.
>>
>> Presumably you are looking in master. cowboy_websocket does that in master now. cowboy_websocket_handler is in Cowboy 1.0.
>>
>> --
>> Lo?c Hoguin
>> http://ninenines.eu
>
--
Lo?c Hoguin
http://ninenines.eu
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