Re: [mosquitto-dev] Bridge connection over Websockets

[Martin Kjær Jørgensen <me@xxxxxxxx>]

On Sat, Nov 19 2022, Greg Troxel <gdt@xxxxxxxxxx> wrote:

> [[PGP Signed Part:No public key for 1FDA7AE8098ED60E created at 2022-11-19T18:47:59+0100 using DSA]]
>
> Abilio Marques <abiliojr@xxxxxxxxx> writes:
>
>> I was wondering if it's there would be a downside of developing what you
>> need as an external program that sits between your two brokers, and does
>> the conversion to websockets.
>>
>> 1. Program is listening to TCP (+TLS) on one side.
>> 2. When a client connects, it starts the connection to the WS side.
>> 3. If connection on WS succeeds, it starts passing MQTT packets back and
>> forth between both sides.
>>
>> For authentication with username/password, you should have no problem (It's
>> passed transparently). For mutual authentication, maybe client credentials
>> need to be deposited in the program, so they are used on behalf of the
>> client.
>>
>> As a separate tool, it can evolve separate from mosquitto, without it's
>> development pace being limited by mosquitto's project. Also, it can be
>> developed in whatever language you prefer. At the same time, it would avoid
>> mosquitto's bridge code from becoming too complex for a not so popular
>> feature (I might be wrong).
>>
>> What do you think of the option of keeping it separate?
>
> I'm not the one wanting this, but since mosquitto already has
> server-side websocket support, adding in calls to use outgoing
> websockets would seem not that hard.   As far as I can tell it will just
> take someone to write code, including an option to choose that and docs,
> and that seems vastly easier than writing an external translator.

My thoughts exactly, but I'm no expert in either mosquitto or libwebsockets
codebase ... yet ;-)

>
> If there's some reason there is significant difficulty, that's another
> story, but nobody has explained why there would be.
>
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