‘代码迁移初始化’

cuikaidong

2025-06-12 64931370717723655d4ecec4802dcdc54ec015f5

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/*!
 * The buffer module from node.js, for the browser.
 *
 * @author   Feross Aboukhadijeh <http://feross.org>
 * @license  MIT
 */
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bscribe){var f=[];n.forEach((function(t){u.options.reconnectPeriod>0&&(u._resubscribeTopics[t.topic]=t.qos,f.push(t.topic))})),u.messageIdToTopic[t.messageId]=f}return this.outgoing[t.messageId]=function(t,e){if(!t)for(var r=e.granted,i=0;i<r.length;i+=1)n[i].qos=r[i];s(t,n)},this._sendPacket(t),this}s(null,[])},m.prototype.unsubscribe=function(t,e){var r={cmd:"unsubscribe",qos:1,messageId:this._nextId()},n=this;return e=e||v,this._checkDisconnecting(e)||("string"===typeof t?r.unsubscriptions=[t]:"object"===typeof t&&t.length&&(r.unsubscriptions=t),this.options.resubscribe&&r.unsubscriptions.forEach((function(t){delete n._resubscribeTopics[t]})),this.outgoing[r.messageId]=e,this._sendPacket(r)),this},m.prototype.end=function(t,e){var r=this;function n(){r.disconnected=!0,r.incomingStore.close((function(){r.outgoingStore.close((function(){e&&e.apply(null,arguments),r.emit("end")}))})),r._deferredReconnect&&r._deferredReconnect()}function i(){r._cleanUp(t,p.bind(null,n))}return"function"===typeof t&&(e=t,t=!1),this.disconnecting||(this._clearReconnect(),this.disconnecting=!0,!t&&Object.keys(this.outgoing).length>0?this.once("outgoingEmpty",setTimeout.bind(null,i,10)):i()),this},m.prototype.removeOutgoingMessage=function(t){var e=this.outgoing[t];return delete this.outgoing[t],this.outgoingStore.del({messageId:t},(function(){e(new Error("Message removed"))})),this},m.prototype.reconnect=function(t){var e=this,r=function(){t?(e.options.incomingStore=t.incomingStore,e.options.outgoingStore=t.outgoingStore):(e.options.incomingStore=null,e.options.outgoingStore=null),e.incomingStore=e.options.incomingStore||new o,e.outgoingStore=e.options.outgoingStore||new o,e.disconnecting=!1,e.disconnected=!1,e._deferredReconnect=null,e._reconnect()};return this.disconnecting&&!this.disconnected?this._deferredReconnect=r:r(),this},m.prototype._reconnect=function(){this.emit("reconnect"),this._setupStream()},m.prototype._setupReconnect=function(){var t=this;!t.disconnecting&&!t.reconnectTimer&&t.options.reconnectPeriod>0&&(this.reconnecting||(this.emit("offline"),this.reconnecting=!0),t.reconnectTimer=setInterval((function(){t._reconnect()}),t.options.reconnectPeriod))},m.prototype._clearReconnect=function(){this.reconnectTimer&&(clearInterval(this.reconnectTimer),this.reconnectTimer=null)},m.prototype._cleanUp=function(t,e){e&&this.stream.on("close",e),t?(0===this.options.reconnectPeriod&&this.options.clean&&y(this.outgoing),this.stream.destroy()):this._sendPacket({cmd:"disconnect"},p.bind(null,this.stream.end.bind(this.stream))),this.disconnecting||(this._clearReconnect(),this._setupReconnect()),null!==this.pingTimer&&(this.pingTimer.clear(),this.pingTimer=null),e&&!this.connected&&(this.stream.removeListener("close",e),e())},m.prototype._sendPacket=function(t,e){if(this.connected){switch(this._shiftPingInterval(),t.cmd){case"publish":break;case"pubrel":return void _(this,t,e);default:return void g(this,t,e)}switch(t.qos){case 2:case 1:_(this,t,e);break;case 0:default:g(this,t,e);break}}else 0===(t.qos||0)&&this.queueQoSZero||"publish"!==t.cmd?this.queue.push({packet:t,cb:e}):t.qos>0?(e=this.outgoing[t.messageId],this.outgoingStore.put(t,(function(t){if(t)return e&&e(t)}))):e&&e(new Error("No connection to broker"))},m.prototype._setupPingTimer=function(){var t=this;!this.pingTimer&&this.options.keepalive&&(this.pingResp=!0,this.pingTimer=f((function(){t._checkPing()}),1e3*this.options.keepalive))},m.prototype._shiftPingInterval=function(){this.pingTimer&&this.options.keepalive&&this.options.reschedulePings&&this.pingTimer.reschedule(1e3*this.options.keepalive)},m.prototype._checkPing=function(){this.pingResp?(this.pingResp=!1,this._sendPacket({cmd:"pingreq"})):this._cleanUp(!0)},m.prototype._handlePingresp=function(){this.pingResp=!0},m.prototype._handleConnack=function(t){var e=t.returnCode,r=["","Unacceptable protocol version","Identifier rejected","Server unavailable","Bad username or password","Not authorized"];if(clearTimeout(this.connackTimer),0===e)this.reconnecting=!1,this.emit("connect",t);else if(e>0){var n=new Error("Connection refused: "+r[e]);n.code=e,this.emit("error",n)}},m.prototype._handlePublish=function(t,e){e="undefined"!==typeof e?e:v;var r=t.topic.toString(),n=t.payload,i=t.qos,o=t.messageId,s=this;switch(i){case 2:this.incomingStore.put(t,(function(t){if(t)return e(t);s._sendPacket({cmd:"pubrec",messageId:o},e)}));break;case 1:this.emit("message",r,n,t),this.handleMessage(t,(function(t){if(t)return e(t);s._sendPacket({cmd:"puback",messageId:o},e)}));break;case 0:this.emit("message",r,n,t),this.handleMessage(t,e);break;default:break}},m.prototype.handleMessage=function(t,e){e()},m.prototype._handleAck=function(t){var e=t.messageId,r=t.cmd,n=null,i=this.outgoing[e],o=this;if(i){switch(r){case"pubcomp":case"puback":delete this.outgoing[e],this.outgoingStore.del(t,i);break;case"pubrec":n={cmd:"pubrel",qos:2,messageId:e},this._sendPacket(n);break;case"suback":if(delete this.outgoing[e],1===t.granted.length&&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