node addon mysql

安装mysql

    1、brew install mysql

    2、mysql_secure_installation 修改密码

    3、mysql -u root -p  登陆

编辑node-gyp binding.gyp

    1、brew --prefix mysql 获取安装目录

    2、include_dirs 添加 

             "/usr/local/Cellar/mysql/8.0.17/include"

            " /usr/local/Cellar/mysql/8.0.17/include/mysql"

    3、libraries 添加  "/usr/local/Cellar/mysql/8.0.17/lib/libmysqlclient.a"

    4、node-gyp configure

    5、node-gyp build

    6、node-gyp configure -- -f  xcode

代码

     1、引入头文件 

                #include

    2、初始化链接

            MYSQL*conn;

    3、node addon init创建mysql connection

            std::stringserver ="localhost";

            std::stringuser ="root";

            std::stringpassword ="****";

            std::stringdatebase ="testdb";

            conn=mysql_init(NULL);

            if(!mysql_real_connect(conn, server.c_str(), user.c_str(), password.c_str(), datebase.c_str(),0,NULL,0)) {

                    std::cout<<"connect to database error"<

                    exit(1);

            }

    4、node::AtExit关闭mysql 链接

            node::AtExit(atExitCallback);

            staticvoidatExitCallback(void* arg) {

                mysql_close(conn);

                std::cout<<"close conn"<

            }

    5、执行查询

            void RunCallback(const Nan::FunctionCallbackInfo &info) {

                MYSQL_RES* res;

                MYSQL_ROW row;

                if (mysql_query(conn, "SELECT * FROM Cars")) {

                        std::cout<<"send SQL query"<< std:endl;

                   }

                res = mysql_use_result(conn);

                while((row =mysql_fetch_row(res)) !=NULL) {

                        std::cout<< row[0] <<','<< row[1] <<','<< row[2] <

                }

                mysql_free_result(res);

        }