jkdb/jkdb.min.js

javascript interface for kdb+/q

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r=8,t=P(e,null),n=Buffer.alloc(8+t);n[0]=1,n.writeUInt32LE(t+8,4);var o=function(e){var t=D(e);switch(n[r]=t,r++,t){case 101:n[r++]=0;break;case 244:var o=1000000n*BigInt(e.getTime()-E);n.writeBigInt64LE(o,r),r+=8;break;case 247:n.writeDoubleLE(e,r),r+=8;break;case 249:n.writeBigInt64LE(e,r),r+=8;break;case 255:n[r++]=e?1:0;break;case 98:n[r++]=0,n[r++]=99;var i=e[Symbol.for("meta")],c=i.c;n[r++]=11,a(c,11),n[r++]=0,n[r++]=0,n.writeUInt32LE(c.length,r),r+=4,c.forEach(function(t,o){var c=k.indexOf(i.t[o]);c=c>0?c:0,n[r++]=c,a(e[t],c)});break;case 99:var u=Object.keys(e),s=Object.values(e);n[r++]=11,a(u,11),n[r++]=0,a(s,0);break;case 0:case 1:case 2:case 6:case 7:case 9:case 10:case 11:case 12:case 14:case 15:a(e,t)}},a=function(e){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:0;if(n[r++]=0,10===t){var a=n.write(e,r+4);n.writeUInt32LE(a,r),r+=4+a}else n.writeUInt32LE(e.length,r),r+=4;switch(t){case 0:e.forEach(function(e){o(e)});break;case 1:e.forEach(function(e){return 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n.writeDoubleLE(NaN,r);r+=8})}};return o(e),n},ACK:Buffer.from("010200000a0000006500","hex")},C=function(){function o(r){var t,n,i,c,u,s,f,l,h,v;return function(e,r){if(!(e instanceof r))throw new TypeError("Cannot call a class as a function")}(this,o),(v=a(this,o)).socketArgs=r,v.host=null!==(t=r.host)&&void 0!==t?t:"localhost",v.port=r.port,v.user=null!==(n=r.user)&&void 0!==n?n:"",v.password=null!==(i=r.password)&&void 0!==i?i:"",v.useBigInt=null!==(c=r.useBigInt)&&void 0!==c&&c,v.socket=null,v.callbacks=[],v.socketTimeout=null!==(u=r.socketTimeout)&&void 0!==u?u:0,v.socketNoDelay=null===(s=r.socketNoDelay)||void 0===s||s,v.msgBuffer=e.Buffer.alloc(0),v.enableTLS=null!==(f=r.enableTLS)&&void 0!==f&&f,v.includeNanosecond=null!==(l=r.includeNanosecond)&&void 0!==l&&l,v.dateToMillisecond=null!==(h=r.dateToMillisecond)&&void 0!==h&&h,v.isConnected=!1,v}return function(e,r){if("function"!=typeof r&&null!==r)throw new TypeError("Super expression must either be null or a function");e.prototype=Object.create(r&&r.prototype,{constructor:{value:e,writable:!0,configurable:!0}}),Object.defineProperty(e,"prototype",{writable:!1}),r&&s(e,r)}(o,r.EventEmitter),i(o,[{key:"setSocket",value:function(e){var r=this;this.socket=e,this.isConnected=!0,this.socket.setNoDelay(this.socketNoDelay),this.socket.setTimeout(this.socketTimeout),this.socket.on("end",function(){return r.emit("end")}),this.socket.on("timeout",function(){return r.emit("timeout")}),this.socket.on("error",function(e){return r.emit("error",e)}),this.socket.on("close",function(e){return r.emit("close",e)}),this.socket.on("data",function(e){return r.incomingMsgHandler(e)})}},{key:"auth",value:function(r,t){var n=this,o="".concat(this.user,":").concat(this.password),a=e.Buffer.byteLength(o,"ascii"),i=e.Buffer.alloc(a+2);i.write(o,0,a,"ascii"),i.writeUInt8(3,a),i.writeUInt8(0,a+1),r.write(i),r.once("data",function(e){1===e.length?e[0]>=1?(r.removeAllListeners("close"),r.removeAllListeners("error"),n.callbacks=[],n.setSocket(r),t(null),r.on("close",function(){n.callbacks.forEach(function(e){return e(new Error("LOST_CONNECTION"),null)}),n.callbacks=[],n.isConnected=!1})):t(new Error("UNSUPPORTED_KDB_VERSION<=2.5")):t(new Error("INVALID_AUTH_RESPONSE"))})}},{key:"connect",value:function(e){var r=this;if(this.isConnected)return e(null);""===this.user&&(this.user=process.env.USER),this.socket&&this.socket.end();var o,a=!1,i=function(r){a||(a=!0,e(r))},c=function(){o.removeAllListeners("error"),o.once("close",function(){o.end(),i(new Error("ERR_CONNECTION_CLOSED - Wrong Credentials?"))}),o.once("error",function(e){o.end(),i(e)}),r.auth(o,i)};(o=this.enableTLS?n.connect(this.port,this.host,{rejectUnauthorized:!1},c):t.connect(this.port,this.host,c)).once("error",function(e){return i(e)})}},{key:"close",value:function(e){this.socket?(this.socket.once("close",function(){e&&e()}),this.socket.end(),this.isConnected=!1):e&&e()}},{key:"incomingMsgHandler",value:function(r){for(this.msgBuffer=this.msgBuffer.length>0?e.Buffer.concat([this.msgBuffer,r]):r;this.msgBuffer.length>=8;){var t=this.msgBuffer.readUInt32LE(4);if(t>this.msgBuffer.length)break;var n=this.msgBuffer.subarray(0,t);this.msgBuffer=this.msgBuffer.subarray(t);var o=void 0,a=void 0;try{o=U.deserialize(n,this.useBigInt,this.includeNanosecond,this.dateToMillisecond),a=null}catch(e){o=null,a=e}var i=n.readUInt8(1);2===i?this.callbacks.shift()(a,o):0===i?!a&&Array.isArray(o)&&"upd"===o[0]&&this.emit("upd",o):this.socket.write(U.ACK)}}},{key:"sync",value:function(e,r){var t=this;if("function"!=typeof r)throw new Error("Expecting a callback function as last param");if(!this.isConnected)return r(new Error("NOT_CONNECTED"),null);if(!e||Array.isArray(e)&&0===e.length)this.callbacks.push(r);else{var n=U.serialize(e);n.writeUInt8(1,1),this.socket.write(n,function(){return t.callbacks.push(r)})}}},{key:"asyn",value:function(e,r){var t=U.serialize(e);t.writeUInt8(0,1),r?this.socket.write(t,r):this.socket.write(t)}},{key:"connectAsync",value:function(){var e=this;return new Promise(function(r,t){return e.connect(function(e){return e?t(e):r()})})}},{key:"syncAsync",value:function(e){var r=this;return new Promise(function(t,n){return r.sync(e,function(e,r){return e?n(e):t(r)})})}},{key:"closeAsync",value:function(){var e=this;return new Promise(function(r){return e.close(r)})}}])}();exports.QConnection=C;