I need to implement a websocket client using c++. I have already created a basic websocket server using ruby. But now I want to test the connection using c/c++. Is there any easy to use libraries available to implement websockets in c/c++ ?
Thanks in advance.
The WebSocket is closed before the connection is established error message indicates that some client code, or other mechanism, has closed the websocket connection before the connection was fully established.
close() The WebSocket. close() method closes the WebSocket connection or connection attempt, if any. If the connection is already CLOSED , this method does nothing.
To close a WebSocket connection, a closing frame is sent (opcode 0x08 ). In addition to the opcode, the close frame may contain a body that indicates the reason for closing.
1 WebSockets are open as long as you want and are not hackish (like long-polling and other alternatives).
Websocket++ should do it foryou. https://github.com/zaphoyd/websocketpp
although knowing what versions of Websocket the server/client implement are important.
There's a great library here, Beast.WebSocket which builds heavily on Boost.Asio: http://vinniefalco.github.io/
Here's an example program that talks websocket:
#include <beast/websocket.hpp>
#include <beast/buffers_debug.hpp>
#include <boost/asio.hpp>
#include <iostream>
#include <string>
int main()
{
// Normal boost::asio setup
std::string const host = "echo.websocket.org";
boost::asio::io_service ios;
boost::asio::ip::tcp::resolver r(ios);
boost::asio::ip::tcp::socket sock(ios);
boost::asio::connect(sock,
r.resolve(boost::asio::ip::tcp::resolver::query{host, "80"}));
using namespace beast::websocket;
// WebSocket connect and send message using beast
stream<boost::asio::ip::tcp::socket&> ws(sock);
ws.handshake(host, "/");
ws.write(boost::asio::buffer("Hello, world!"));
// Receive WebSocket message, print and close using beast
beast::streambuf sb;
opcode op;
ws.read(op, sb);
ws.close(close_code::normal);
std::cout <<
beast::debug::buffers_to_string(sb.data()) << "\n";
}
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