@synerty/vortexjs
Version:
Custom observable data serialisation and routing based on Angular 2+
265 lines • 40.5 kB
JavaScript
import { VortexClientABC, VortexClientStateE } from "./VortexClientABC";
import { dateStr, getFiltStr } from "./UtilMisc";
import { PayloadEnvelope } from "./PayloadEnvelope";
export class VortexClientWebsocket extends VortexClientABC {
Socket = WebSocket || MozWebSocket;
socket = null;
lastReconnectDate = Date.parse("01-Jan-2017");
unsentBuffer = [];
// Make note of when we're reconnecting,
// otherwise closing the last websocket causes a reconnection
// call which then closes the current socket being open (in a loop)
reconnectingInProgress = false;
_data = "";
_vortexMsgsQueue = [];
constructor(vortexStatusService, url, vortexClientName) {
super(vortexStatusService, url, vortexClientName);
}
get isReady() {
return (this.socket != null && this.socket.readyState === this.Socket.OPEN);
}
// OVERRIDE Send
send(payloadEnvelope) {
if (!this.isReady) {
throw new Error("Websocked vortex is not online.");
}
return super.send(payloadEnvelope);
}
// OVERRIDE reconnect
async reconnect() {
this.vortexStatusService.logDebug("VortexClientWebsocket.reconnect called");
if (this.reconnectingInProgress === true) {
this.vortexStatusService.logDebug("VortexClientWebsocket.reconnect returning #1");
return;
}
this.clearBeatTimer();
this._vortexState = VortexClientStateE.Idle;
this.reconnectingInProgress = true;
try {
await this.createSocket();
}
catch (e) {
console.error(`${dateStr()} Failed to connect websocket ${e}`);
}
this.reconnectingInProgress = false;
this.restartTimer();
this.vortexStatusService.logDebug("VortexClientWebsocket.reconnect returning #2");
}
sendVortexMsg(vortexMsgs) {
this.unsentBuffer.add(vortexMsgs);
this.sendMessages();
}
sendMessages() {
while (this.unsentBuffer.length !== 0) {
if (!this.isReady)
return;
let vortexMsg = this.unsentBuffer.shift();
this.socket.send(vortexMsg + ".");
}
}
_processData() {
if (this._data) {
let indexOfDot = this._data.indexOf(".");
while (indexOfDot !== -1) {
const vortexMsg = this._data.slice(0, indexOfDot);
this._data = this._data.slice(indexOfDot + 1);
if (vortexMsg.length !== 0) {
this._vortexMsgsQueue.push(vortexMsg);
}
indexOfDot = this._data.indexOf(".");
}
}
while (this._vortexMsgsQueue.length !== 0) {
this._processVortexMsgs() //
.catch((e) => console.log(`ERROR VortexClientWebsocket: ${e}`));
}
}
async _processVortexMsgs() {
while (this._vortexMsgsQueue.length !== 0) {
const vortexMsg = this._vortexMsgsQueue.shift();
try {
const payloadEnvelope = await PayloadEnvelope.fromVortexMsg(vortexMsg);
this._deliverPayload(payloadEnvelope);
}
catch (e) {
console.log(dateStr() +
`ERROR: processing vortexMsg\n${e}\n${vortexMsg}`);
}
}
}
_deliverPayload(payloadEnvelope) {
this.receive(payloadEnvelope);
}
async shutdown() {
this.vortexStatusService.logDebug("VortexClientWebsocket.shutdown called");
await this.closeWebsocket();
this.vortexStatusService.logDebug("VortexClientWebsocket.shutdown" + " returned");
}
async closeWebsocket() {
this.vortexStatusService.logDebug("VortexClientWebsocket.closeWebsocket called");
// If we're open then close
if (this.socket && this.socket.readyState === this.Socket.OPEN) {
await new Promise((resolve, reject) => {
this.vortexStatusService.logDebug("Websocket close starting");
this.setClosing();
this.socket.addEventListener("close", () => {
this.vortexStatusService.logInfo("Websocket close complete");
this.setClosed();
resolve();
});
this.socket.close();
});
}
this.socket = null;
this.vortexStatusService.logDebug("VortexClientWebsocket.closeWebsocket returning");
}
async createSocket() {
this.vortexStatusService.logDebug("VortexClientWebsocket.createSocket called");
// If we're already connecting, then do nothing
if (this.socket && this.socket.readyState === this.Socket.CONNECTING) {
if (!this.isShutdown) {
this.vortexStatusService.logDebug("VortexClientWebsocket.createSocket" + " returning #1");
return;
}
try {
console.log("Aborting WebSocket connection attempt," +
" this is probably because of Vortex reconnection");
this.socket.close();
}
catch (e) {
// pass
}
}
this.vortexStatusService.logDebug("VortexClientWebsocket.createSocket Closing old websocket");
await this.closeWebsocket();
// Don't continually reconnect
let reconnectDiffMs = Date.now() - this.lastReconnectDate;
if (reconnectDiffMs < this.RECONNECT_BACKOFF_SECONDS * 1000) {
this.vortexStatusService.logDebug("VortexClientWebsocket.createSocket returning #2 - backoff" +
" timeout");
setTimeout(() => this.createSocket(), this.RECONNECT_BACKOFF_SECONDS * 1000 - reconnectDiffMs + 10);
return;
}
this.lastReconnectDate = Date.now();
// Prepare the args to send
const args = {
vortexUuid: this.uuid,
vortexName: this.name,
};
this.vortexStatusService.logConnectionInfo(`${dateStr()} WebSocket, connecting to ${this.url}`);
await new Promise((resolve, reject) => {
// Construct + open the socket
let promiseCalled = false;
this.vortexStatusService.logDebug("VortexClientWebsocket.createSocket Creating socket");
this.socket = new this.Socket(this.url + getFiltStr(args), []);
this.socket.binaryType = "arraybuffer";
this.socket.addEventListener("message", (event) => {
this.onMessage(event, () => {
this.vortexStatusService.logDebug("VortexClientWebsocket.createSocket calling resolve" +
" from message");
resolve();
promiseCalled = true;
});
});
this.socket.addEventListener("close", (event) => {
this.vortexStatusService.logDebug("VortexClientWebsocket.createSocket addEventListener close");
this.onClose(event);
if (!promiseCalled) {
this.vortexStatusService.logDebug("VortexClientWebsocket.createSocket calling reject" +
" from close");
promiseCalled = true;
reject();
}
});
this.socket.addEventListener("error", (event) => {
this.vortexStatusService.logDebug(`VortexClientWebsocket.createSocket addEventListener error: ${event}`);
this.onError(event, () => {
this.vortexStatusService.logDebug("VortexClientWebsocket.createSocket calling reject" +
" from error");
reject();
promiseCalled = true;
});
});
this.socket.addEventListener("open", (event) => {
this.vortexStatusService.logDebug("VortexClientWebsocket.createSocket addEventListener open");
this.onOpen(event);
});
});
this.vortexStatusService.logDebug("VortexClientWebsocket.createSocket returning #3");
}
onMessage(event, promiseResolver) {
if (!this.isOnline) {
this.setOnline();
promiseResolver();
}
this.beat();
if (event.data.length == null) {
this.vortexStatusService.logConnectionError("WebSocket, We've received a websocket binary message," +
" we expect a unicode");
return;
}
// If the server sends us a '.', that's a heart beat, return it.
if (event.data === ".") {
this.socket != null && this.socket.send(".");
return;
}
if (event.data[0] !== "{") {
this._data += event.data;
}
else {
// It starts with {, ensure it ends with }
if (event.data[event.data.length - 1] !== "}") {
console.log(dateStr() +
" ERROR, Payload should end with }," +
" but it doesn't: " +
event.data);
return;
}
this._vortexMsgsQueue.push(event.data);
}
this._processData();
}
onOpen(event) {
super
.send(new PayloadEnvelope())
.catch((e) => console.log(`ERROR VortexClientWebsocket onOpen Send: ${e}`));
this.vortexStatusService.logConnectionInfo("WebSocket, connecting");
}
onClose(event) {
this.vortexStatusService.logConnectionInfo("WebSocket, closed");
if (!(this.socket && this.socket.readyState === this.Socket.OPEN)) {
this.setClosed();
}
// The base class will reconnect
}
onError(event, reject) {
reject(event.error?.toString() || "Websocket failed to connect");
// onClose will get called as well
// Check if the server is still up, if it is we've been logged out
this.testIfOnlineAndLoggedOut()
.then(() => console.log("Server is unreachable"))
.catch(() => {
this.vortexStatusService.logConnectionError("Vortex Websocket doesn't connect but server is online," +
" Marking vortex as logged out");
this.vortexStatusService.setHttpSessionLoggedOut();
return;
});
}
testIfOnlineAndLoggedOut() {
return new Promise((resolve, reject) => {
const httpUrl = "http" + this._url.substring(2);
let xmlHttp = new XMLHttpRequest();
xmlHttp.timeout = 2000;
xmlHttp.responseType = "document";
xmlHttp.onload = function (event) {
reject();
};
xmlHttp.onerror = function (event) {
resolve();
};
xmlHttp.open("GET", httpUrl, true); // true for asynchronous
xmlHttp.send(null);
});
}
}
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{ VortexClientABC, VortexClientStateE } from \"./VortexClientABC\";\nimport { VortexStatusService } from \"./VortexStatusService\";\nimport { dateStr, getFiltStr } from \"./UtilMisc\";\nimport { PayloadEnvelope } from \"./PayloadEnvelope\";\n\n// https://developer.mozilla.org/en-US/docs/Web/API/WebSocket\n\ndeclare const WebSocket: any;\ndeclare const MozWebSocket: any;\n\nexport class VortexClientWebsocket extends VortexClientABC {\n    private Socket = WebSocket || MozWebSocket;\n    private socket: WebSocket | null = null;\n\n    private lastReconnectDate: number = Date.parse(\"01-Jan-2017\");\n\n    private unsentBuffer: string[] = [];\n\n    // Make note of when we're reconnecting,\n    // otherwise closing the last websocket causes a reconnection\n    // call which then closes the current socket being open (in  a loop)\n    private reconnectingInProgress: boolean = false;\n\n    private _data: string = \"\";\n    private _vortexMsgsQueue: string[] = [];\n\n    constructor(\n        vortexStatusService: VortexStatusService,\n        url: string,\n        vortexClientName: string,\n    ) {\n        super(vortexStatusService, url, vortexClientName);\n    }\n\n    get isReady(): boolean {\n        return (\n            this.socket != null && this.socket.readyState === this.Socket.OPEN\n        );\n    }\n\n    // OVERRIDE Send\n    send(payloadEnvelope: PayloadEnvelope | PayloadEnvelope[]): Promise<void> {\n        if (!this.isReady) {\n            throw new Error(\"Websocked vortex is not online.\");\n        }\n\n        return super.send(payloadEnvelope);\n    }\n\n    // OVERRIDE reconnect\n    async reconnect(): Promise<void> {\n        this.vortexStatusService.logDebug(\n            \"VortexClientWebsocket.reconnect called\",\n        );\n\n        if (this.reconnectingInProgress === true) {\n            this.vortexStatusService.logDebug(\n                \"VortexClientWebsocket.reconnect returning #1\",\n            );\n            return;\n        }\n        this.clearBeatTimer();\n        this._vortexState = VortexClientStateE.Idle;\n        this.reconnectingInProgress = true;\n        try {\n            await this.createSocket();\n        } catch (e) {\n            console.error(`${dateStr()} Failed to connect websocket ${e}`);\n        }\n        this.reconnectingInProgress = false;\n        this.restartTimer();\n\n        this.vortexStatusService.logDebug(\n            \"VortexClientWebsocket.reconnect returning #2\",\n        );\n    }\n\n    protected sendVortexMsg(vortexMsgs: string[]): void {\n        this.unsentBuffer.add(vortexMsgs);\n\n        this.sendMessages();\n    }\n\n    private sendMessages() {\n        while (this.unsentBuffer.length !== 0) {\n            if (!this.isReady) return;\n\n            let vortexMsg = this.unsentBuffer.shift();\n            this.socket.send(vortexMsg + \".\");\n        }\n    }\n\n    private _processData(): void {\n        if (this._data) {\n            let indexOfDot: number = this._data.indexOf(\".\");\n            while (indexOfDot !== -1) {\n                const vortexMsg = this._data.slice(0, indexOfDot);\n                this._data = this._data.slice(indexOfDot + 1);\n\n                if (vortexMsg.length !== 0) {\n                    this._vortexMsgsQueue.push(vortexMsg);\n                }\n\n                indexOfDot = this._data.indexOf(\".\");\n            }\n        }\n\n        while (this._vortexMsgsQueue.length !== 0) {\n            this._processVortexMsgs() //\n                .catch((e) => console.log(`ERROR VortexClientWebsocket: ${e}`));\n        }\n    }\n\n    private async _processVortexMsgs() {\n        while (this._vortexMsgsQueue.length !== 0) {\n            const vortexMsg = this._vortexMsgsQueue.shift();\n\n            try {\n                const payloadEnvelope =\n                    await PayloadEnvelope.fromVortexMsg(vortexMsg);\n\n                this._deliverPayload(payloadEnvelope);\n            } catch (e) {\n                console.log(\n                    dateStr() +\n                        `ERROR: processing vortexMsg\\n${e}\\n${vortexMsg}`,\n                );\n            }\n        }\n    }\n\n    private _deliverPayload(payloadEnvelope: PayloadEnvelope) {\n        this.receive(payloadEnvelope);\n    }\n\n    protected async shutdown(): Promise<void> {\n        this.vortexStatusService.logDebug(\n            \"VortexClientWebsocket.shutdown called\",\n        );\n        await this.closeWebsocket();\n        this.vortexStatusService.logDebug(\n            \"VortexClientWebsocket.shutdown\" + \" returned\",\n        );\n    }\n\n    private async closeWebsocket(): Promise<void> {\n        this.vortexStatusService.logDebug(\n            \"VortexClientWebsocket.closeWebsocket called\",\n        );\n        // If we're open then close\n        if (this.socket && this.socket.readyState === this.Socket.OPEN) {\n            await new Promise<void>((resolve, reject) => {\n                this.vortexStatusService.logDebug(\"Websocket close starting\");\n                this.setClosing();\n                this.socket.addEventListener(\"close\", () => {\n                    this.vortexStatusService.logInfo(\n                        \"Websocket close complete\",\n                    );\n                    this.setClosed();\n                    resolve();\n                });\n                this.socket.close();\n            });\n        }\n\n        this.socket = null;\n\n        this.vortexStatusService.logDebug(\n            \"VortexClientWebsocket.closeWebsocket returning\",\n        );\n    }\n\n    private async createSocket(): Promise<void> {\n        this.vortexStatusService.logDebug(\n            \"VortexClientWebsocket.createSocket called\",\n        );\n        // If we're already connecting, then do nothing\n        if (this.socket && this.socket.readyState === this.Socket.CONNECTING) {\n            if (!this.isShutdown) {\n                this.vortexStatusService.logDebug(\n                    \"VortexClientWebsocket.createSocket\" + \" returning #1\",\n                );\n                return;\n            }\n            try {\n                console.log(\n                    \"Aborting WebSocket connection attempt,\" +\n                        \" this is probably because of Vortex reconnection\",\n                );\n                this.socket.close();\n            } catch (e) {\n                // pass\n            }\n        }\n\n        this.vortexStatusService.logDebug(\n            \"VortexClientWebsocket.createSocket Closing old websocket\",\n        );\n        await this.closeWebsocket();\n\n        // Don't continually reconnect\n        let reconnectDiffMs = Date.now() - this.lastReconnectDate;\n        if (reconnectDiffMs < this.RECONNECT_BACKOFF_SECONDS * 1000) {\n            this.vortexStatusService.logDebug(\n                \"VortexClientWebsocket.createSocket returning #2 - backoff\" +\n                    \" timeout\",\n            );\n            setTimeout(\n                () => this.createSocket(),\n                this.RECONNECT_BACKOFF_SECONDS * 1000 - reconnectDiffMs + 10,\n            );\n            return;\n        }\n\n        this.lastReconnectDate = Date.now();\n\n        // Prepare the args to send\n        const args = {\n            vortexUuid: this.uuid,\n            vortexName: this.name,\n        };\n\n        this.vortexStatusService.logConnectionInfo(\n            `${dateStr()} WebSocket, connecting to ${this.url}`,\n        );\n\n        await new Promise<void>((resolve, reject) => {\n            // Construct + open the socket\n            let promiseCalled = false;\n\n            this.vortexStatusService.logDebug(\n                \"VortexClientWebsocket.createSocket Creating socket\",\n            );\n            this.socket = new this.Socket(this.url + getFiltStr(args), []);\n\n            this.socket.binaryType = \"arraybuffer\";\n\n            this.socket.addEventListener(\"message\", (event) => {\n                this.onMessage(event, () => {\n                    this.vortexStatusService.logDebug(\n                        \"VortexClientWebsocket.createSocket calling resolve\" +\n                            \" from message\",\n                    );\n                    resolve();\n                    promiseCalled = true;\n                });\n            });\n            this.socket.addEventListener(\"close\", (event) => {\n                this.vortexStatusService.logDebug(\n                    \"VortexClientWebsocket.createSocket addEventListener close\",\n                );\n                this.onClose(event);\n                if (!promiseCalled) {\n                    this.vortexStatusService.logDebug(\n                        \"VortexClientWebsocket.createSocket calling reject\" +\n                            \" from close\",\n                    );\n                    promiseCalled = true;\n                    reject();\n                }\n            });\n            this.socket.addEventListener(\"error\", (event) => {\n                this.vortexStatusService.logDebug(\n                    `VortexClientWebsocket.createSocket addEventListener error: ${event}`,\n                );\n                this.onError(event, () => {\n                    this.vortexStatusService.logDebug(\n                        \"VortexClientWebsocket.createSocket calling reject\" +\n                            \" from error\",\n                    );\n                    reject();\n                    promiseCalled = true;\n                });\n            });\n            this.socket.addEventListener(\"open\", (event) => {\n                this.vortexStatusService.logDebug(\n                    \"VortexClientWebsocket.createSocket addEventListener open\",\n                );\n                this.onOpen(event);\n            });\n        });\n\n        this.vortexStatusService.logDebug(\n            \"VortexClientWebsocket.createSocket returning #3\",\n        );\n    }\n\n    private onMessage(event, promiseResolver) {\n        if (!this.isOnline) {\n            this.setOnline();\n            promiseResolver();\n        }\n\n        this.beat();\n\n        if (event.data.length == null) {\n            this.vortexStatusService.logConnectionError(\n                \"WebSocket, We've received a websocket binary message,\" +\n                    \" we expect a unicode\",\n            );\n            return;\n        }\n\n        // If the server sends us a '.', that's a heart beat, return it.\n        if (event.data === \".\") {\n            this.socket != null && this.socket.send(\".\");\n            return;\n        }\n\n        if (event.data[0] !== \"{\") {\n            this._data += event.data;\n        } else {\n            // It starts with {, ensure it ends with }\n            if (event.data[event.data.length - 1] !== \"}\") {\n                console.log(\n                    dateStr() +\n                        \" ERROR, Payload should end with },\" +\n                        \" but it doesn't: \" +\n                        event.data,\n                );\n                return;\n            }\n            this._vortexMsgsQueue.push(event.data);\n        }\n\n        this._processData();\n    }\n\n    private onOpen(event) {\n        super\n            .send(new PayloadEnvelope())\n            .catch((e) =>\n                console.log(`ERROR VortexClientWebsocket onOpen Send: ${e}`),\n            );\n        this.vortexStatusService.logConnectionInfo(\"WebSocket, connecting\");\n    }\n\n    private onClose(event) {\n        this.vortexStatusService.logConnectionInfo(\"WebSocket, closed\");\n        if (!(this.socket && this.socket.readyState === this.Socket.OPEN)) {\n            this.setClosed();\n        }\n        // The base class will reconnect\n    }\n\n    private onError(event, reject) {\n        reject(event.error?.toString() || \"Websocket failed to connect\");\n        // onClose will get called as well\n\n        // Check if the server is still up, if it is we've been logged out\n        this.testIfOnlineAndLoggedOut()\n            .then(() => console.log(\"Server is unreachable\"))\n            .catch(() => {\n                this.vortexStatusService.logConnectionError(\n                    \"Vortex Websocket doesn't connect but server is online,\" +\n                        \" Marking vortex as logged out\",\n                );\n                this.vortexStatusService.setHttpSessionLoggedOut();\n                return;\n            });\n    }\n\n    private testIfOnlineAndLoggedOut(): Promise<void> {\n        return new Promise<void>((resolve, reject) => {\n            const httpUrl = \"http\" + this._url.substring(2);\n            let xmlHttp = new XMLHttpRequest();\n            xmlHttp.timeout = 2000;\n            xmlHttp.responseType = \"document\";\n            xmlHttp.onload = function (event) {\n                reject();\n            };\n            xmlHttp.onerror = function (event) {\n                resolve();\n            };\n            xmlHttp.open(\"GET\", httpUrl, true); // true for asynchronous\n            xmlHttp.send(null);\n        });\n    }\n}\n"]}