第12章 Mosquitto插件与扩展机制

第12章 插件与扩展机制12.1 插件架构Mosquitto Core插件接口认证插件ACL插件消息处理插件外部认证动态权限消息增强12.2 认证插件动态认证流程数据库认证插件Mosquitto客户端数据库认证插件Mosquitto客户端CONNECT请求认证查询用户返回密码hash验证密码认证结果CONNACK配置示例# /etc/mosquitto/mosquitto.conf# 加载认证插件plugin /usr/lib/mosquitto/auth_plugin.so# 配置数据库auth_opt_db_host localhost auth_opt_db_port3306auth_opt_db_name mqtt auth_opt_db_user mqtt_user auth_opt_db_password mqtt_pass12.3 自定义插件开发插件结构#includemosquitto_plugin.hintmosquitto_auth_plugin_version(void){returnMOSQUITTO_AUTH_PLUGIN_VERSION;}intmosquitto_auth_plugin_init(void**user_data,structmosquitto_opt*opts,intopt_count){// 初始化插件returnMOSQ_ERR_SUCCESS;}intmosquitto_auth_plugin_cleanup(void*user_data,structmosquitto_opt*opts,intopt_count){// 清理资源returnMOSQ_ERR_SUCCESS;}intmosquitto_auth_security_init(void*user_data,structmosquitto_opt*opts,intopt_count,bool reload){// 安全初始化returnMOSQ_ERR_SUCCESS;}intmosquitto_auth_acl_check(void*user_data,intaccess,conststructmosquitto*client,conststructmosquitto_msg*msg){// ACL检查// return MOSQ_ERR_SUCCESS or MOSQ_ERR_ACL_DENIED}12.4 常用插件Redis认证插件# 安装gitclone https://github.com/aclindsa/mosquitto-auth-plugin.gitcdmosquitto-auth-pluginmakesudomakeinstall# 配置auth_plugin /usr/lib/mosquitto/auth-plugin.so auth_opt_backends redis auth_opt_redis_host localhost auth_opt_redis_port6379auth_opt_redis_db0HTTP认证插件# 配置HTTP API认证auth_opt_backends http auth_opt_http_getuser_uri http://api.example.com/auth/user auth_opt_http_aclcheck_uri http://api.example.com/auth/aclHTTP API实现示例# Flask API示例fromflaskimportFlask,request,jsonify appFlask(__name__)app.route(/auth/user,methods[POST])defauth_user():datarequest.json usernamedata.get(username)passworddata.get(password)# 验证逻辑ifverify_user(username,password):returnjsonify({result:allow})returnjsonify({result:deny}),403app.route(/auth/acl,methods[POST])defauth_acl():datarequest.json usernamedata.get(username)topicdata.get(topic)accdata.get(acc)# 1read, 2write# ACL检查逻辑ifcheck_acl(username,topic,acc):returnjsonify({result:allow})returnjsonify({result:deny}),40312.5 消息拦截插件消息到达插件拦截检查/修改记录日志增强数据继续处理12.6 本章小结了解了Mosquitto的插件机制和扩展开发。