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Subject: [OASIS Issue Tracker] Commented: (MQTT-13) Topic name has an upper length limit of 32,767 characters ?
[ http://tools.oasis-open.org/issues/browse/MQTT-13?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=33651#action_33651 ]
Rahul Gupta commented on MQTT-13:
---------------------------------
updated section 3.3.2.1 in WD-04
----------------------------------------------
The Topic name MUST be a string which can be encoded as UTF-8 up to 65535 bytes in length. The Topic name MUST not contain wildcard characters. When received by a client that subscribed using wildcard characters, this string is the absolute topic specified by the originating publisher and not the subscription string used by the client.
> Topic name has an upper length limit of 32,767 characters ?
> -----------------------------------------------------------
>
> Key: MQTT-13
> URL: http://tools.oasis-open.org/issues/browse/MQTT-13
> Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
> Issue Type: Improvement
> Components: core
> Reporter: Rahul Gupta
> Assignee: Rahul Gupta
>
> Snippet from Section 2.2 of v3.1 specification.
> ---------------------------------------------------------------
> The topic name is a UTF-encoded string. See the section on MQTT and UTF-8 for more information. Topic name has an upper length limit of 32,767 characters.
> Snippet in Appendix A -
> --------------------------------
> The following principles apply to the construction and content of a topic tree:
> > The length is limited to 64k but within that there are no limits to the number of
> levels in a topic tree.
> Should the topic length on PUBLISH command be restricted to 32,767 characters ?
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