概要
之前的文章讲解了通过官方TCPSocket来实现socket通信,这篇文章我们来看下如何通过使用SocketIO三方库来实现长链。
技术细节
假如服务地址为:https://host:port/app
我们将服务地址拆解为
请求地址:https://host:port
命名空间:app
1、在项目的oh-package.json文件中添加引用
"dependencies": {
"@ohos/socketio_2.x": "^1.0.3"
}
2、创建SocketIO实例
this.client = new client_socket();
this.client?.set_open_listener(() => {
this.connected = true;
Logger.info(TAG, "连接服务器成功");
this.callback?.onOpen();
});
this.client?.set_fail_listener(() => {
Logger.info(TAG, "连接服务器失败");
this.callback?.onFail();
});
this.client?.set_reconnecting_listener(() => {
Logger.info(TAG, "正在重新连接服务器中");
this.callback?.onReconnecting();
});
this.client?.set_reconnect_listener(() => {
Logger.info(TAG, "重新连接服务器");
this.callback?.onReconnect();
});
this.client?.set_close_listener((reason: string) => {
this.connected = false;
Logger.info(TAG, "连接关闭 " + reason);
this.callback?.onClose(reason);
});
this.client?.set_socket_open_listener((nsp: string) => {
Logger.info(TAG, "on_socket_open " + nsp);
this.callback?.onSocketOpen(nsp);
});
this.client?.set_socket_close_listener((nsp: string) => {
Logger.info(TAG, "on_socket_close " + nsp);
this.callback?.onSocketClose(nsp);
});
// 设置命名空间
this.client?.set_nsp("/app");
// 设置header参数
this.client?.set_headers(`{token:${BigInt(tokenId)},name:测试}`);
this.client?.set_reconnect_delay(1000)
this.client?.set_reconnect_delay_max(5000)
this.client?.set_reconnect_attempts(3)
3、连接和断连
// 连接
this.client?.connect('https://host:port')
// 断连
this.client?.socket_close();