websocket: close 1000 (normal)

As an AI language model, I don't have the context to provide a specific answer. However, in general, WebSocket is a communication protocol that allows real-time, two-way communication between a client and a server over a single, long-lived connection. The "close 1000 (normal)" message indicates that the WebSocket connection has been closed normally, without any error or abnormal termination. The number "1000" represents the WebSocket status code for a normal closure. When a WebSocket connection is closed, both the client and the server receive the close message, and any subsequent messages sent over the connection will not be delivered.

相关问题

C++使用websocket例子

下面是一个使用 C++ 和 Boost.Beast 库实现的简单 WebSocket 示例：

#include <iostream>
#include <boost/beast/core.hpp>
#include <boost/beast/websocket.hpp>
#include <boost/asio/ip/tcp.hpp>

namespace beast = boost::beast;
namespace http = beast::http;
namespace websocket = beast::websocket;
namespace net = boost::asio;
using tcp = net::ip::tcp;

int main() {
    try {
        net::io_context io_context;

        // Connect to the server
        tcp::resolver resolver(io_context);
        auto const results = resolver.resolve("echo.websocket.org", "80");
        websocket::stream<tcp::socket> ws(io_context);
        net::connect(ws.next_layer(), results);

        // Set a decorator to change the User-Agent of the handshake
        ws.set_option(websocket::stream_base::decorator([](websocket::request_type& req) {
            req.set(http::field::user_agent, std::string(BOOST_BEAST_VERSION_STRING) + " websocket-client-coro");
        }));

        // Perform the websocket handshake
        ws.handshake("echo.websocket.org", "/");

        // Send a message to the server
        ws.write(net::buffer(std::string("Hello, world!")));

        // Receive a message from the server
        beast::flat_buffer buffer;
        ws.read(buffer);
        std::cout << beast::make_printable(buffer.data()) << std::endl;

        // Close the WebSocket connection
        ws.close(websocket::close_code::normal);

        return 0;
    } catch (const std::exception& e) {
        std::cerr << "Error: " << e.what() << std::endl;
        return 1;
    }
}

在上面的代码中，我们使用 Boost.Beast 库来实现 WebSocket 客户端。我们首先创建一个 `io_context` 对象，然后使用 `tcp::resolver` 解析服务器的地址和端口号。接下来，我们创建一个 `websocket::stream` 对象，并使用 `net::connect` 连接到服务器。

我们设置一个装饰器来更改握手的 User-Agent。然后，我们调用 `ws.handshake` 方法来执行 WebSocket 握手。一旦握手成功，我们就可以使用 `ws.write` 方法将消息发送到服务器，并使用 `ws.read` 方法从服务器接收消息。最后，我们使用 `ws.close` 方法关闭 WebSocket 连接。

注意：在使用 Boost.Beast 库时，需要将其添加到项目依赖中，并在编译选项中添加 `-lboost_system` 和 `-lboost_thread`。

c++ websocket

要在 C++ 中实现 WebSocket，您可以使用现有的 WebSocket 库，如 Boost.Beast 或 uWebSockets。这些库提供了 WebSocket 协议的实现，并允许您创建 WebSocket 客户端和服务器。

以下是使用 Boost.Beast 创建 WebSocket 客户端的示例代码：

#include <boost/beast/core.hpp>
#include <boost/beast/websocket.hpp>
#include <boost/asio/ip/tcp.hpp>
#include <iostream>
#include <cstdlib>
#include <string>

namespace beast = boost::beast; // from <boost/beast.hpp>
namespace http = beast::http;   // from <boost/beast/http.hpp>
namespace websocket = beast::websocket; // from <boost/beast/websocket.hpp>
namespace net = boost::asio;    // from <boost/asio.hpp>
using tcp = boost::asio::ip::tcp; // from <boost/asio/ip/tcp.hpp>

int main(int argc, char** argv)
{
    try
    {
        // Check command line arguments.
        if (argc != 4)
        {
            std::cerr <<
                "Usage: websocket-client-sync <host> <port> <text>\n" <<
                "Example:\n" <<
                "    websocket-client-sync echo.websocket.org 80 \"Hello, world!\"\n";
            return EXIT_FAILURE;
        }
        auto const host = argv[1];
        auto const port = argv[2];
        auto const text = argv[3];

        // The io_context is required for all I/O
        net::io_context ioc;

        // These objects perform our I/O
        tcp::resolver resolver{ioc};
        websocket::stream<tcp::socket> ws{ioc};

        // Look up the domain name
        auto const results = resolver.resolve(host, port);

        // Make the connection on the IP address we get from a lookup
        auto ep = net::connect(ws.next_layer(), results);

        // Set up the WebSocket handshake
        ws.handshake(host, "/", beast::multi_buffer());

        // Send the message
        ws.write(net::buffer(std::string{text}));

        // This buffer will hold the incoming message
        beast::flat_buffer buffer;

        // Read a message into our buffer
        ws.read(buffer);

        // Close the WebSocket connection
        ws.close(websocket::close_code::normal);

        // If we get here then the connection is closed gracefully

        // The buffers() function helps print a ConstBufferSequence
        std::cout << beast::buffers(buffer.data()) << std::endl;

        // Exit with success
        return EXIT_SUCCESS;
    }
    catch (std::exception const& e)
    {
        std::cerr << "Error: " << e.what() << std::endl;
        return EXIT_FAILURE;
    }
}

该示例使用 Boost.Beast 创建 WebSocket 客户端，连接到指定的 WebSocket 服务器并发送一条消息。接收到服务器的响应后，关闭 WebSocket 连接并打印出响应消息。