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在C++中,有幾個(gè)流行的WebSocket庫(kù)可以用于實(shí)現(xiàn)WebSocket客戶端和服務(wù)器
websocketpp
庫(kù):websocketpp
是一個(gè)高性能的C++ WebSocket庫(kù),支持Boost.Asio庫(kù)。要實(shí)現(xiàn)自動(dòng)重連,你需要在連接斷開(kāi)時(shí)捕獲相應(yīng)的事件,并在適當(dāng)?shù)臅r(shí)候嘗試重新連接。
首先,安裝websocketpp
庫(kù):
git clone https://github.com/zaphoyd/websocketpp.git
cd websocketpp
mkdir build
cd build
cmake ..
make install
然后,創(chuàng)建一個(gè)名為websocket_client.cpp
的文件,包含以下內(nèi)容:
#include<iostream>
#include <websocketpp/config/asio_no_tls_client.hpp>
#include <websocketpp/client.hpp>
typedef websocketpp::client<websocketpp::config::asio_client> client;
using websocketpp::lib::placeholders::_1;
using websocketpp::lib::placeholders::_2;
using websocketpp::lib::bind;
class WebSocketClient {
public:
WebSocketClient() : m_reconnecting(false) {
m_client.clear_access_channels(websocketpp::log::alevel::all);
m_client.clear_error_channels(websocketpp::log::elevel::all);
m_client.init_asio();
m_client.set_open_handler(bind(&WebSocketClient::on_open, this, _1));
m_client.set_close_handler(bind(&WebSocketClient::on_close, this, _1));
m_client.set_fail_handler(bind(&WebSocketClient::on_fail, this, _1));
}
void connect(const std::string &uri) {
websocketpp::lib::error_code ec;
client::connection_ptr con = m_client.get_connection(uri, ec);
if (ec) {
std::cout << "Could not create connection: " << ec.message()<< std::endl;
return;
}
m_client.connect(con);
}
void run() {
m_client.run();
}
private:
void on_open(websocketpp::connection_hdl hdl) {
std::cout << "Connected to server"<< std::endl;
m_reconnecting = false;
}
void on_close(websocketpp::connection_hdl hdl) {
std::cout << "Connection closed"<< std::endl;
if (!m_reconnecting) {
m_reconnecting = true;
m_client.get_io_service().post(bind(&WebSocketClient::reconnect, this));
}
}
void on_fail(websocketpp::connection_hdl hdl) {
std::cout << "Connection failed"<< std::endl;
if (!m_reconnecting) {
m_reconnecting = true;
m_client.get_io_service().post(bind(&WebSocketClient::reconnect, this));
}
}
void reconnect() {
std::cout << "Reconnecting..."<< std::endl;
connect("ws://your-websocket-server-uri");
}
client m_client;
bool m_reconnecting;
};
int main() {
WebSocketClient client;
client.connect("ws://your-websocket-server-uri");
client.run();
return 0;
}
編譯并運(yùn)行示例:
g++ websocket_client.cpp -o websocket_client -lwebsocketpp -lpthread -lboost_system
./websocket_client
這個(gè)示例將連接到指定的WebSocket服務(wù)器,并在連接斷開(kāi)時(shí)嘗試自動(dòng)重連。請(qǐng)確保將your-websocket-server-uri
替換為實(shí)際的WebSocket服務(wù)器URI。
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