[OASIS Issue Tracker] Commented: (MQTT-1) Flowing MQTT V3.1.1 protocol over a WebSocket

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

    [ http://tools.oasis-open.org/issues/browse/MQTT-1?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=33275#action_33275 ] 

Andrew Banks commented on MQTT-1:
---------------------------------

Some counter arguments.

Leaving the path unspecified means that it cannot be specified in the future. It also means that security software or firewalls cannot use this field to include or exclude the MQTT WebSocket traffic.

The WebSocket implementations must do framing, the interfaces provide access to the frames. If we ignore framing it is done twice, once by the Websocket layer and then again by the MQTT protocol layer to discover the MQTT command messages. This adds redundant implementation and processing in the receipt of messages in both the client and server.

> Flowing MQTT  V3.1.1 protocol over a WebSocket
> ----------------------------------------------
>
>                 Key: MQTT-1
>                 URL: http://tools.oasis-open.org/issues/browse/MQTT-1
>             Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
>          Issue Type: New Feature
>    Affects Versions: 3.1.1
>         Environment: Web browser
>            Reporter: Andrew Banks
>
> Constraints and considerations for flowing MQTT binary protocol over a Websocket, RFC 6455.
> See also http://wiki.eclipse.org/Paho/Paho_Websockets
> Making MQTT over Websockets inter-operable:
> Must support WebSockets as defined by RFC 6455
> Must use websocket binary frames. 
> This enables MQTT v3,1 per the specification to flow over websockets with no change to the MQTT packets
> Must use "mqttv3.1" as the websocket protocol name. 
> This is applicable when creating the websocket: e.g. new WebSocket(wsurl, 'mqttv3.1')
> The path portion of the url specified on the MQTT connect should be "mqtt" 
> For instance ws://m2m.eclipse.org:800/mqtt . mqtt should be the default with the option for an alternative to be configured / specified
> Open points for further discussion:
> Should an MQTT packet be aligned with a WebSocket frame? Should MQTT Protocol messages be sent exactly one per frame or should the framing be arbitrary with multiple or partial MQTT messages per frame with no frame alignment.?

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://tools.oasis-open.org/issues/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira