A C++11 networking library with examples.

Limited to "Linux" environments. Scripts are tested and used on CentOS 7.

Uses:

• Lots of C.
• CryptoPP for symmetric key encryption.
• OpenSSL for private key encryption.
• libpqxx for PostgreSQL integration.
• DigitalOcean API for quick deployments.

• Execute some commands to load and build the library:

git clone https://github.com/bwackwat/libjaypea
cd libjaypea
bin/setup-centos7.sh
bin/build-library.sh

• Implement the library e.g. a simple echo server (echo.cpp):

#include "tcp-server.hpp"

int main(int, char**){
	EpollServer server(10000, 10);

	server.on_read = [&](int fd, const char* packet, size_t length)->ssize_t{
		if(server.send(fd, packet, length)){
			return -1;
		}
		return length;
	};

	server.run();

	return 0;
}

• Build your code:

bin/build-with-library.sh
> Usage: <relative path to cpp file> <executable name> <optional additional libraries/compiler flags>
bin/build-with-library.sh echo.cpp echo

• Run your code:

build/echo

The example above creates a multithreaded tcp epoll server listening on port 10000, with a maximum of 10 open sockets per thread.

It is a basic echo server.

server.on_read is the definitive function that will be called every time a fd (socket connection) has provided data to read.

server.send will return true on error. If it fails, the lambda returns -1; this will close the connection for safety purposes.

If the send succeeds, then the function returns with a success code (the given length).

server.run will start the server with a number of threads usually equal to the number of available hyperthreads (std::thread::hardware_concurrency()).

In order of coolness.

1. bwackwat. Hopefully this example will replace NGINX running on bwackwat.com...
2. comd/com. An AES encrypted server and client. The server provides access to a shell, the client sends commands to that remote shell. Like sshd/ssh.
3. message-api. An HTTPS JSON API.
4. pgsql-provider. A secure database abstraction layer using pgsql-model as an ORM.
5. pgsql-model-test. A simple class to query a PostgreSQL database in a common way.
6. ponal-server/ponal-client. A simple redis-inspired key-value store server and corresponding client.
7. tcp-poll-server. A TCP server able to manage many connections using poll.
8. tcp-client. You can speed test an TCP server.
9. echo-server. A fast, simple echo server.
10. chat-server/chat-client. An incomplete chat server and client.
11. read-stdin-tty. A tool to read from STDIN tty in raw mode.
12. keyfile-gen. Creates a key for comd/com.
13. http-redirecter. Redirects HTTP traffic. Good practice.
14. json-test. Tests JSON parsing.
15. queue-test. Tests the queue implementation.