Name: Writing a Network Client with POCO
Start: 2022-05-11T18:00:00-06:00
End: 2022-05-11T20:00:00-06:00

Networking is often a core requirement for modern applications, but the standard C++ library doesn't yet include any networking support. The Boost libraries have had networking components in the ASIO library, but it looks complicated and filled with details. What if we aren't experts in networking but we need to have networking to support a feature in our application, what options are available to us?

POCO began as a library of POrtable COmponents, so it covers more than just networking. The networking portion of POCO includes:
\- stream\, datagram\, multicast\, server\, Unix domain and raw sockets
\- multithreaded TCP server framework
\- reactor server framework
\- HTTP\(S\) client and server framework
\- HTTP Basic and Digest authentication
\- NTLM authentication
\- JSON Web Token support
\- C\+\+ server page compiler
\- FTP client
\- clients for the email protocols SMTP and POP3
\- URI and UUID handling
\- HTML forms processing
\- HTML template compiler
\- MIME multipart messages
\- SSL/TLS support based on OpenSSL
\- WebSocket client and server

This month, Richard Thomson will give us an introduction to POCO networking components centered around writing a network client to talk to an NNTP server. We'll look at the main abstractions provided by POCO and how those are used to build a network client to an NNTP server. NNTP (Network News Transfer Protocol) is a stateful network protocol for reading articles from newsgroups, generally referred to as "usenet". Unlike single hosted forums or mailing lists, usenet is a distributed system with no central authority, providing redundancy and resiliency from single point failures (like the host of your favorite forum suddenly deciding they don't want to pay server costs anymore and deleting the whole thing).

This will be an online event, so drinks and snacks are on you!

POCO: [https://pocoproject.org](https://pocoproject.org), [https://github.com/pocoproject/poco](https://github.com/pocoproject/poco)
NNTP: [https://datatracker.ietf.org/doc/html/rfc3977](https://datatracker.ietf.org/doc/html/rfc3977)

Watch previous topics on the Utah C++ Programmers YouTube channel:
[https://www.youtube.com/channel/UC56D6OIs_IAy24ubjC2_hmQ](https://www.youtube.com/channel/UC56D6OIs_IAy24ubjC2_hmQ)

Future topics: [https://utahcpp.wordpress.com/future-meeting-topics/](https://utahcpp.wordpress.com/future-meeting-topics/)

Richard Thomson

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