Feature to add a topic remapping when in bridge mode

[Evil2000]

Hey guys,

I added a feature which allows topics to be remapped when publishing to and receiving from remote brokers. This allows a topic tree from the local broker to be inserted into the topic tree of the remote broker at an appropriate place.
It is similar to the remote-prefix parameter in mosquitto.

When sending messages to a remote bridge server, the topic defined in subscribe or publish can be prepended with a prefix.

The difference to mosquitto is, that only the published or subscribed remote topic is prefixed. The local topic is not changed (like local-prefix in mosquitto does).

Example 1: Publish all messages in all local topics to the remote system under topic bridge1/ and receive all messages from the remote system in topic bridge1/ in local. For instance, the local topic home/sensor1/temp becomes bridge1/home/sensor1/temp on the remote site and vice versa.

bridge {
  # ...
  topic_prefix bridge1/
  publish #
  subscribe #
}

Example 2: Publish all messages from local topic1/ to the remote system under bridge1/topic1/ and receive all messages from the remote system under bridge1/topic2/ to local topic2/.

bridge {
  # ...
  topic_prefix bridge1/
  publish topic1/#
  subscribe topic2/#
}

I would appreciate it if you have look at the new feature or maybe you like to merge it into your repo.

Kind regards.

[halfgaar]

Just a quick note from my phone: there's already a branch with this feature up for testing by the requester. I'm curious if it behaves like you want. I can rebase it tomorrow.

…

-- Sent from my phone. Please excuse my brevity and spelling errors.

On January 7, 2025 11:06:34 PM GMT+01:00, "Evil.2000" ***@***.***> wrote: Hey guys, I added a feature which allows topics to be remapped when publishing to and receiving from remote brokers. This allows a topic tree from the local broker to be inserted into the topic tree of the remote broker at an appropriate place. It is similar to the [remote-prefix](https://mosquitto.org/man/mosquitto-conf-5.html) parameter in mosquitto. When sending messages to a remote bridge server, the topic defined in `subscribe` or `publish` can be prepended with a `prefix`. The difference to mosquitto is, that only the published or subscribed remote topic is prefixed. The local topic is not changed (like `local-prefix` in mosquitto does). Example 1: Publish all messages in all local topics to the remote system under topic `bridge1/` and receive all messages from the remote system in topic `bridge1/` in local. For instance, the local topic `home/sensor1/temp` becomes `bridge1/home/sensor1/temp` on the remote site and vice versa. ``` bridge { # ... topic_prefix bridge1/ publish # subscribe # } ``` Example 2: Publish all messages from local `topic1/` to the remote system under `bridge1/topic1/` and receive all messages from the remote system under `bridge1/topic2/` to local `topic2/`. ``` bridge { # ... topic_prefix bridge1/ publish topic1/# subscribe topic2/# } ``` I would appreciate it if you have look at the new feature or maybe you like to merge it into your repo. Kind regards. You can view, comment on, or merge this pull request online at: #127 -- Commit Summary -- * Added support for prefixing the topic when connecting in bridge mode. * Extended flashmq.conf manpage with option topic_prefix. -- File Changes -- M .clang-format (72) M .gitignore (6) M bridgeconfig.cpp (19) M bridgeconfig.h (1) M client.cpp (8) M configfileparser.cpp (8) M man/flashmq.conf.5 (27) M man/flashmq.conf.5.dbk5 (30) M man/flashmq.conf.5.html (30) M mqttpacket.cpp (127) M mqttpacket.h (3) M types.h (1) -- Patch Links -- https://github.com/halfgaar/FlashMQ/pull/127.patch https://github.com/halfgaar/FlashMQ/pull/127.diff -- Reply to this email directly or view it on GitHub: #127 You are receiving this because you are subscribed to this thread. Message ID: ***@***.***>

[halfgaar]

#81

https://github.com/halfgaar/FlashMQ/tree/WIP-bridge-prefixes

Still not rebased, byt FYI.

[halfgaar]

I rebased the branch on master, and included a man page.