neffos.js
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javascript client for the modern neffos websocket framework
1 lines • 15.7 kB
JavaScript
const isBrowser="undefined"!=typeof window;var _fetch="undefined"==typeof fetch?void 0:fetch,WebSocket="undefined"==typeof WebSocket?void 0:WebSocket;if(!isBrowser){const a=await import("ws");WebSocket=a.WebSocket}else WebSocket=window.WebSocket;const OnNamespaceConnect="_OnNamespaceConnect",OnNamespaceConnected="_OnNamespaceConnected",OnNamespaceDisconnect="_OnNamespaceDisconnect",OnRoomJoin="_OnRoomJoin",OnRoomJoined="_OnRoomJoined",OnRoomLeave="_OnRoomLeave",OnRoomLeft="_OnRoomLeft",OnAnyEvent="_OnAnyEvent",OnNativeMessage="_OnNativeMessage",ackBinary="M",ackIDBinary="A",ackNotOKBinary="H",waitIsConfirmationPrefix="#",waitComesFromClientPrefix="$";function isSystemEvent(a){return!(a!==OnNamespaceConnect&&a!==OnNamespaceConnected&&a!==OnNamespaceDisconnect&&a!==OnRoomJoin&&a!==OnRoomJoined&&a!==OnRoomLeave&&a!==OnRoomLeft)}function isEmpty(a){return!(void 0!==a)||!(null!==a)||(""==a||"string"==typeof a||a instanceof String?0===a.length||""===a:!!(a instanceof Error)&&isEmpty(a.message))}class Message{wait;Namespace;Room;Event;Body;Err;isError;isNoOp;isInvalid;IsForced;IsLocal;IsNative;SetBinary;isConnect(){return this.Event==OnNamespaceConnect||!1}isDisconnect(){return this.Event==OnNamespaceDisconnect||!1}isRoomJoin(){return this.Event==OnRoomJoin||!1}isRoomLeft(){return this.Event==OnRoomLeft||!1}isWait(){return!isEmpty(this.wait)&&(!(this.wait[0]!=waitIsConfirmationPrefix)||this.wait[0]==waitComesFromClientPrefix||!1)}unmarshal(){return JSON.parse(this.Body)}}function marshal(a){return JSON.stringify(a)}const messageSeparator=";",messageFieldSeparatorReplacement="@%!semicolon@%!",validMessageSepCount=7,trueString="1",falseString="0",escapeRegExp=/;/g;function escapeMessageField(a){return isEmpty(a)?"":a.replace(escapeRegExp,messageFieldSeparatorReplacement)}const unescapeRegExp=new RegExp(messageFieldSeparatorReplacement,"g");function unescapeMessageField(a){return isEmpty(a)?"":a.replace(unescapeRegExp,messageSeparator)}class replyError extends Error{constructor(a){super(a),this.name="replyError",Error.captureStackTrace(this,replyError),Object.setPrototypeOf(this,replyError.prototype)}}function reply(a){return new replyError(a)}function isReply(a){return a instanceof replyError}var textEncoder=new TextEncoder,textDecoder=new TextDecoder("utf-8"),messageSeparatorCharCode=";".charCodeAt(0);function serializeMessage(a){if(a.IsNative&&isEmpty(a.wait))return a.Body;let b=falseString,c=falseString,d=a.Body||"";isEmpty(a.Err)||(d=a.Err.message,!isReply(a.Err)&&(b=trueString)),a.isNoOp&&(c=trueString);let e=[a.wait||"",escapeMessageField(a.Namespace),escapeMessageField(a.Room),escapeMessageField(a.Event),b,c,""].join(messageSeparator);if(a.SetBinary){let a=textEncoder.encode(e);e=new Uint8Array(a.length+d.length),e.set(a,0),e.set(d,a.length)}else d instanceof Uint8Array&&(d=textDecoder.decode(d,{stream:!1})),e+=d;return e}function splitN(a,b,c){if(0==c)return[a];var d=a.split(b,c);if(d.length==c){let c=d.join(b)+b;return d.push(a.substr(c.length)),d}return[a]}function deserializeMessage(a,b){var c=new Message;if(0==a.length)return c.isInvalid=!0,c;var d,e=a instanceof ArrayBuffer;if(e){const b=new Uint8Array(a);let e=1,g=0;for(var f=0;f<b.length&&!(b[f]==messageSeparatorCharCode&&(e++,g=f,e==validMessageSepCount));f++);if(e!=validMessageSepCount)return c.isInvalid=!0,c;d=splitN(textDecoder.decode(b.slice(0,g),{stream:!1}),messageSeparator,validMessageSepCount-2),d.push(a.slice(g+1,a.length)),c.SetBinary=!0}else d=splitN(a,messageSeparator,validMessageSepCount-1);if(d.length!=validMessageSepCount)return b?(c.Event=OnNativeMessage,c.Body=a):c.isInvalid=!0,c;c.wait=d[0],c.Namespace=unescapeMessageField(d[1]),c.Room=unescapeMessageField(d[2]),c.Event=unescapeMessageField(d[3]),c.isError=d[4]==trueString||!1,c.isNoOp=d[5]==trueString||!1;var g=d[6];return isEmpty(g)?c.Body="":c.isError?c.Err=new Error(g):c.Body=g,c.isInvalid=!1,c.IsForced=!1,c.IsLocal=!1,c.IsNative=b&&c.Event==OnNativeMessage||!1,c}function genWait(){if(!isBrowser){let a=process.hrtime();return waitComesFromClientPrefix+1e9*a[0]+a[1]}else{let a=window.performance.now();return waitComesFromClientPrefix+a.toString()}}function genWaitConfirmation(a){return waitIsConfirmationPrefix+a}function genEmptyReplyToWait(a){return a+messageSeparator.repeat(validMessageSepCount-1)}class Room{nsConn;name;constructor(a,b){this.nsConn=a,this.name=b}emit(a,b){let c=new Message;return c.Namespace=this.nsConn.namespace,c.Room=this.name,c.Event=a,c.Body=b,this.nsConn.conn.write(c)}leave(){let a=new Message;return a.Namespace=this.nsConn.namespace,a.Room=this.name,a.Event=OnRoomLeave,this.nsConn.askRoomLeave(a)}}class NSConn{conn;namespace;events;rooms;constructor(a,b,c){this.conn=a,this.namespace=b,this.events=c,this.rooms=new Map}emit(a,b){let c=new Message;return c.Namespace=this.namespace,c.Event=a,c.Body=b,this.conn.write(c)}emitBinary(a,b){let c=new Message;return c.Namespace=this.namespace,c.Event=a,c.Body=b,c.SetBinary=!0,this.conn.write(c)}ask(a,b){let c=new Message;return c.Namespace=this.namespace,c.Event=a,c.Body=b,this.conn.ask(c)}async joinRoom(a){return await this.askRoomJoin(a)}room(a){return this.rooms.get(a)}async leaveAll(){let a=new Message;return a.Namespace=this.namespace,a.Event=OnRoomLeft,a.IsLocal=!0,this.rooms.forEach(async(b,c)=>{a.Room=c;try{await this.askRoomLeave(a)}catch(a){return a}}),null}forceLeaveAll(a){let b=new Message;b.Namespace=this.namespace,b.Event=OnRoomLeave,b.IsForced=!0,b.IsLocal=a,this.rooms.forEach((a,c)=>{b.Room=c,fireEvent(this,b),this.rooms.delete(c),b.Event=OnRoomLeft,fireEvent(this,b),b.Event=OnRoomLeave})}disconnect(){let a=new Message;return a.Namespace=this.namespace,a.Event=OnNamespaceDisconnect,this.conn.askDisconnect(a)}askRoomJoin(a){return new Promise(async(b,c)=>{let d=this.rooms.get(a);if(void 0!==d)return void b(d);let e=new Message;e.Namespace=this.namespace,e.Room=a,e.Event=OnRoomJoin,e.IsLocal=!0;try{await this.conn.ask(e)}catch(a){return void c(a)}let f=fireEvent(this,e);return isEmpty(f)?void(d=new Room(this,a),this.rooms.set(a,d),e.Event=OnRoomJoined,fireEvent(this,e),b(d)):void c(f)})}async askRoomLeave(a){if(!this.rooms.has(a.Room))return ErrBadRoom;try{await this.conn.ask(a)}catch(a){return a}let b=fireEvent(this,a);return isEmpty(b)?(this.rooms.delete(a.Room),a.Event=OnRoomLeft,fireEvent(this,a),null):b}replyRoomJoin(a){if(!(isEmpty(a.wait)||a.isNoOp)){if(!this.rooms.has(a.Room)){let b=fireEvent(this,a);if(!isEmpty(b))return a.Err=b,void this.conn.write(a);this.rooms.set(a.Room,new Room(this,a.Room)),a.Event=OnRoomJoined,fireEvent(this,a)}this.conn.writeEmptyReply(a.wait)}}replyRoomLeave(a){return isEmpty(a.wait)||a.isNoOp?void 0:this.rooms.has(a.Room)?void(fireEvent(this,a),this.rooms.delete(a.Room),this.conn.writeEmptyReply(a.wait),a.Event=OnRoomLeft,fireEvent(this,a)):void this.conn.writeEmptyReply(a.wait)}}function fireEvent(a,b){return a.events.has(b.Event)?a.events.get(b.Event)(a,b):a.events.has(OnAnyEvent)?a.events.get(OnAnyEvent)(a,b):null}function isNull(a){return null===a||a===void 0||"undefined"==typeof a}function resolveNamespaces(a,b){if(isNull(a))return isNull(b)||b("connHandler is empty."),null;let c=new Map,d=new Map,e=0;if(Object.keys(a).forEach(function(b){e++;let f=a[b];if(f instanceof Function)d.set(b,f);else if(f instanceof Map)c.set(b,f);else{let a=new Map;Object.keys(f).forEach(function(b){a.set(b,f[b])}),c.set(b,a)}}),0<d.size){if(e!=d.size)return isNull(b)||b("all keys of connHandler should be events, mix of namespaces and event callbacks is not supported "+d.size+" vs total "+e),null;c.set("",d)}return c}function getEvents(a,b){return a.has(b)?a.get(b):null}const URLParamAsHeaderPrefix="X-Websocket-Header-";function parseHeadersAsURLParameters(a,b){if(isNull(a))return b;for(let c in a)if(a.hasOwnProperty(c)){let d=a[c];c=encodeURIComponent(URLParamAsHeaderPrefix+c),d=encodeURIComponent(d);const e=c+"="+d;b=-1==b.indexOf("?")?-1==b.indexOf("#")?b+"?"+e:b.split("#")[0]+"?"+e+"#"+b.split("#")[1]:b.split("?")[0]+"?"+e+"&"+b.split("?")[1]}return b}function dial(a,b,c){return _dial(a,b,0,c)}const websocketReconnectHeaderKey="X-Websocket-Reconnect";function _dial(a,b,c,d){if(isBrowser&&0==a.indexOf("/")){const b="https:"==document.location.protocol?"wss":"ws",c=document.location.port?":"+document.location.port:"";a=b+"://"+document.location.hostname+c+a}return-1==a.indexOf("ws")&&(a="ws://"+a),new Promise((e,f)=>{WebSocket||f("WebSocket is not accessible through this browser.");let g=resolveNamespaces(b,f);if(isNull(g))return;isNull(d)&&(d={}),isNull(d.headers)&&(d.headers={});const h=d.reconnect?d.reconnect:0;0<c&&0<h?d.headers[websocketReconnectHeaderKey]=c.toString():!isNull(d.headers[websocketReconnectHeaderKey])&&delete d.headers[websocketReconnectHeaderKey];const i=makeWebsocketConnection(a,d);let j=new Conn(i,g);j.reconnectTries=c,i.binaryType="arraybuffer",i.onmessage=a=>{let b=j.handle(a);return isEmpty(b)?void(j.isAcknowledged()&&e(j)):void f(b)},i.onopen=()=>{i.send(ackBinary)},i.onerror=a=>{j.close(),f(a)},i.onclose=()=>{if(j.isClosed());else{if(i.onmessage=void 0,i.onopen=void 0,i.onerror=void 0,i.onclose=void 0,0>=h)return j.close(),null;let c=new Map;j.connectedNamespaces.forEach((a,b)=>{let d=[];!isNull(a.rooms)&&0<a.rooms.size&&a.rooms.forEach((a,b)=>{d.push(b)}),c.set(b,d)}),j.close(),whenResourceOnline(a,h,g=>{_dial(a,b,g,d).then(a=>isNull(e)||"function () { [native code] }"==e.toString()?void c.forEach((b,c)=>{a.connect(c).then((a=>b=>{a.forEach(a=>{b.joinRoom(a)})})(b))}):void e(a)).catch(f)})}return null}})}function makeWebsocketConnection(a,b){return isBrowser&&!isNull(b)?(b.headers&&(a=parseHeadersAsURLParameters(b.headers,a)),b.protocols?new WebSocket(a,b.protocols):new WebSocket(a)):new WebSocket(a,b)}function whenResourceOnline(a,b,c){let d=a.replace(/(ws)(s)?\:\/\//,"http$2://"),e=1;const f={method:"HEAD",mode:"no-cors"};let g=()=>{_fetch(d,f).then(()=>{c(e)}).catch(()=>{e++,setTimeout(()=>{g()},b)})};setTimeout(g,b)}const ErrInvalidPayload=new Error("invalid payload"),ErrBadNamespace=new Error("bad namespace"),ErrBadRoom=new Error("bad room"),ErrClosed=new Error("use of closed connection"),ErrWrite=new Error("write closed");function isCloseError(a){return!(!a||isEmpty(a.message))&&0<=a.message.indexOf("[-1] write closed")}class Conn{conn;reconnectTries;_isAcknowledged;allowNativeMessages;ID;closed;waitServerConnectNotifiers;queue;waitingMessages;namespaces;connectedNamespaces;constructor(a,b){this.conn=a,this.reconnectTries=0,this._isAcknowledged=!1,this.namespaces=b;let c=b.has("");this.allowNativeMessages=c&&b.get("").has(OnNativeMessage),this.queue=[],this.waitingMessages=new Map,this.connectedNamespaces=new Map,this.closed=!1}wasReconnected(){return 0<this.reconnectTries}isAcknowledged(){return this._isAcknowledged}handle(a){if(!this._isAcknowledged){let b=this.handleAck(a.data);return null==b?(this._isAcknowledged=!0,this.handleQueue()):this.conn.close(),b}return this.handleMessage(a.data)}handleAck(a){let b=a[0];switch(b){case ackIDBinary:let b=a.slice(1);this.ID=b;break;case ackNotOKBinary:let c=a.slice(1);return new Error(c);default:return this.queue.push(a),null;}}handleQueue(){null==this.queue||0==this.queue.length||this.queue.forEach((a,b)=>{this.queue.splice(b,1),this.handleMessage(a)})}handleMessage(a){let b=deserializeMessage(a,this.allowNativeMessages);if(b.isInvalid)return ErrInvalidPayload;if(b.IsNative&&this.allowNativeMessages){let a=this.namespace("");return fireEvent(a,b)}if(b.isWait()){let a=this.waitingMessages.get(b.wait);if(null!=a)return void a(b)}const c=this.namespace(b.Namespace);switch(b.Event){case OnNamespaceConnect:this.replyConnect(b);break;case OnNamespaceDisconnect:this.replyDisconnect(b);break;case OnRoomJoin:if(c!==void 0){c.replyRoomJoin(b);break}case OnRoomLeave:if(c!==void 0){c.replyRoomLeave(b);break}default:if(c===void 0)return ErrBadNamespace;b.IsLocal=!1;const a=fireEvent(c,b);if(!isEmpty(a))return b.Err=a,this.write(b),a;}return null}connect(a){return this.askConnect(a)}waitServerConnect(a){return isNull(this.waitServerConnectNotifiers)&&(this.waitServerConnectNotifiers=new Map),new Promise(async b=>{this.waitServerConnectNotifiers.set(a,()=>{this.waitServerConnectNotifiers.delete(a),b(this.namespace(a))})})}namespace(a){return this.connectedNamespaces.get(a)}replyConnect(a){if(isEmpty(a.wait)||a.isNoOp)return;let b=this.namespace(a.Namespace);if(void 0!==b)return void this.writeEmptyReply(a.wait);let c=getEvents(this.namespaces,a.Namespace);return isNull(c)?(a.Err=ErrBadNamespace,void this.write(a)):void(b=new NSConn(this,a.Namespace,c),this.connectedNamespaces.set(a.Namespace,b),this.writeEmptyReply(a.wait),a.Event=OnNamespaceConnected,fireEvent(b,a),!isNull(this.waitServerConnectNotifiers)&&0<this.waitServerConnectNotifiers.size&&this.waitServerConnectNotifiers.has(a.Namespace)&&this.waitServerConnectNotifiers.get(a.Namespace)())}replyDisconnect(a){if(!(isEmpty(a.wait)||a.isNoOp)){let b=this.namespace(a.Namespace);return void 0===b?void this.writeEmptyReply(a.wait):void(b.forceLeaveAll(!0),this.connectedNamespaces.delete(a.Namespace),this.writeEmptyReply(a.wait),fireEvent(b,a))}}ask(a){return new Promise((b,c)=>this.isClosed()?void c(ErrClosed):(a.wait=genWait(),this.waitingMessages.set(a.wait,a=>a.isError?void c(a.Err):void b(a)),!this.write(a))?void c(ErrWrite):void 0)}askConnect(a){return new Promise(async(b,c)=>{let d=this.namespace(a);if(void 0!==d)return void b(d);let e=getEvents(this.namespaces,a);if(isNull(e))return void c(ErrBadNamespace);let f=new Message;f.Namespace=a,f.Event=OnNamespaceConnect,f.IsLocal=!0,d=new NSConn(this,a,e);let g=fireEvent(d,f);if(!isEmpty(g))return void c(g);try{await this.ask(f)}catch(a){return void c(a)}this.connectedNamespaces.set(a,d),f.Event=OnNamespaceConnected,fireEvent(d,f),b(d)})}async askDisconnect(a){let b=this.namespace(a.Namespace);if(void 0===b)return ErrBadNamespace;try{await this.ask(a)}catch(a){return a}return b.forceLeaveAll(!0),this.connectedNamespaces.delete(a.Namespace),a.IsLocal=!0,fireEvent(b,a)}isClosed(){return this.closed}write(a){if(this.isClosed())return!1;if(!a.isConnect()&&!a.isDisconnect()){let b=this.namespace(a.Namespace);if(void 0===b)return!1;if(!isEmpty(a.Room)&&!a.isRoomJoin()&&!a.isRoomLeft()&&!b.rooms.has(a.Room))return!1}return this.conn.send(serializeMessage(a)),!0}writeEmptyReply(a){this.conn.send(genEmptyReplyToWait(a))}close(){if(this.closed)return;let a=new Message;a.Event=OnNamespaceDisconnect,a.IsForced=!0,a.IsLocal=!0,this.connectedNamespaces.forEach(b=>{b.forceLeaveAll(!0),a.Namespace=b.namespace,fireEvent(b,a),this.connectedNamespaces.delete(b.namespace)}),this.waitingMessages.clear(),this.closed=!0,this.conn.readyState===this.conn.OPEN&&this.conn.close()}}const neffos={dial:dial,isSystemEvent:isSystemEvent,OnNamespaceConnect:"_OnNamespaceConnect",OnNamespaceConnected:OnNamespaceConnected,OnNamespaceDisconnect:OnNamespaceDisconnect,OnRoomJoin:OnRoomJoin,OnRoomJoined:OnRoomJoined,OnRoomLeave:OnRoomLeave,OnRoomLeft:OnRoomLeft,OnAnyEvent:OnAnyEvent,OnNativeMessage:OnNativeMessage,Message:Message,Room:Room,NSConn:NSConn,Conn:Conn,ErrInvalidPayload:ErrInvalidPayload,ErrBadNamespace:ErrBadNamespace,ErrBadRoom:ErrBadRoom,ErrClosed:ErrClosed,ErrWrite:ErrWrite,isCloseError:isCloseError,reply:reply,marshal:marshal};var root="object"==typeof self&&self.self===self&&self||"object"==typeof global&&global.global===global&&global;root.neffos=neffos;export{dial,isSystemEvent,OnNamespaceConnect,OnNamespaceConnected,OnNamespaceDisconnect,OnRoomJoin,OnRoomJoined,OnRoomLeave,OnRoomLeft,OnAnyEvent,OnNativeMessage,Message,Room,NSConn,Conn,ErrInvalidPayload,ErrBadNamespace,ErrBadRoom,ErrClosed,ErrWrite,isCloseError,reply,marshal};export default neffos;