Create custom protocol or use existing?

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Hi,
i would like to improve my programming skills. So I was thinking about chat application. But Im not sure, if I should use existing protocol like xmpp or create my own. Creating new protocol is big challenge. But where to start? What is your opinion?

thanks for your advices.

Posted 7-Jan-15 6:13am

Jurdo

Updated 7-Jan-15 6:25am

PIEBALDconsult

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Sergey Alexandrovich Kryukov 7-Jan-15 12:23pm

It's up to you. Using existing XMPP has apparent benefits: interoperability with different systems and applications.
Where to start? It's also up to you and not even critical. If someone advices you on that, it might be not useful for you.
—SA

Jurdo 7-Jan-15 14:30pm

But I wanted a recommendation from you. What would be better. If custom protocol or existing. I wont any advice, how to implement it.

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Anthony Fountaine · Accepted Answer · 2015-01-07T08:57:00

I'm not that familiar with the XMPP protocol or chat applications in general. However, if XMPP is a widely used protocol I would recommend implementing it.

By implementing an existing protocol you would gain the experience of how it's done. While coding the XMPP protocol you can start to think of it's pros and cons. After you are done you will be able to easily create your own protocol using a lot of the same code structure.

The other benefit of using an existing protocol is that you will have other applications available to test your implementation of the XMPP protocol with.