mirror of
https://github.com/ad1217/PrinterStatus
synced 2024-11-10 18:45:08 -05:00
server: Move OctoPrint connection handler class to its own file
This commit is contained in:
parent
009612898a
commit
1175754a09
125
server/OctoPrintConnection.ts
Normal file
125
server/OctoPrintConnection.ts
Normal file
@ -0,0 +1,125 @@
|
||||
import * as WebSocket from 'ws';
|
||||
import fetch from 'node-fetch';
|
||||
|
||||
import {ExtendedMessage} from '../types/messages';
|
||||
import * as octoprint from '../types/octoprint';
|
||||
|
||||
const PING_TIME = 10000;
|
||||
|
||||
type Timeout = ReturnType<typeof setTimeout>;
|
||||
|
||||
export default class OctoprintConnection {
|
||||
public webcamURL?: URL;
|
||||
public name?: string;
|
||||
protected lastStatus?: ExtendedMessage;
|
||||
|
||||
constructor(
|
||||
public slug: string,
|
||||
public address: string,
|
||||
protected apikey: string,
|
||||
protected broadcast: (msg: ExtendedMessage) => void
|
||||
) {
|
||||
this.try_connect_websocket();
|
||||
}
|
||||
|
||||
try_connect_websocket() {
|
||||
this.connect_websocket().catch((e) => {
|
||||
console.error(
|
||||
`Failed to connect to "${this.slug}", attempting reconnection in 5 seconds`
|
||||
);
|
||||
console.error(e);
|
||||
setTimeout(() => this.try_connect_websocket(), 5000);
|
||||
});
|
||||
}
|
||||
|
||||
async connect_websocket() {
|
||||
const settings = await this.api_get('settings');
|
||||
this.webcamURL = new URL(settings.webcam.streamUrl, this.address);
|
||||
this.name = settings.appearance.name;
|
||||
|
||||
// do passive login to get a session key from the API key
|
||||
const login: octoprint.LoginResponse = await this.api_post('login', {
|
||||
passive: 'true',
|
||||
});
|
||||
const session_key = login.name + ':' + login.session;
|
||||
|
||||
let pingSender: ReturnType<typeof setInterval>;
|
||||
let pongTimeout: Timeout;
|
||||
|
||||
const url = new URL('/sockjs/websocket', this.address);
|
||||
url.protocol = 'ws';
|
||||
let websocket = new WebSocket(url.toString());
|
||||
websocket
|
||||
.on('open', () => {
|
||||
pingSender = setInterval(() => websocket.ping(), PING_TIME);
|
||||
pongTimeout = this.heartbeat(websocket, pongTimeout);
|
||||
|
||||
console.log(`Connected to "${this.slug}"`);
|
||||
websocket.send(JSON.stringify({ auth: session_key }));
|
||||
})
|
||||
.on('message', (data: WebSocket.Data) => {
|
||||
const event: octoprint.Message = JSON.parse(data as string);
|
||||
|
||||
let ext_event: ExtendedMessage = {
|
||||
...event,
|
||||
printer: this.slug,
|
||||
name: this.name,
|
||||
};
|
||||
this.broadcast(ext_event);
|
||||
|
||||
if ('current' in event || 'history' in event) {
|
||||
this.lastStatus = ext_event;
|
||||
}
|
||||
})
|
||||
.on('pong', () => {
|
||||
pongTimeout = this.heartbeat(websocket, pongTimeout);
|
||||
})
|
||||
.on('close', () => {
|
||||
clearInterval(pingSender);
|
||||
clearTimeout(pongTimeout);
|
||||
|
||||
console.log(
|
||||
`Lost connection to "${this.slug}", attempting reconnection in 5 seconds`
|
||||
);
|
||||
setTimeout(() => this.try_connect_websocket(), 5000);
|
||||
});
|
||||
}
|
||||
|
||||
heartbeat(websocket: WebSocket, pongTimeout: Timeout): Timeout {
|
||||
clearTimeout(pongTimeout);
|
||||
return setTimeout(() => {
|
||||
console.log(`Missed 2 heartbeats for "${this.slug}", disconnecting`);
|
||||
websocket.terminate();
|
||||
}, PING_TIME * 2);
|
||||
}
|
||||
|
||||
async api_get(endpoint: string): Promise<any> {
|
||||
const r = await fetch(new URL('/api/' + endpoint, this.address), {
|
||||
headers: { 'X-Api-Key': this.apikey },
|
||||
});
|
||||
return await r.json();
|
||||
}
|
||||
|
||||
async api_post(endpoint: string, data: any): Promise<any> {
|
||||
const r = await fetch(new URL('/api/' + endpoint, this.address), {
|
||||
headers: {
|
||||
'X-Api-Key': this.apikey,
|
||||
Accept: 'application/json',
|
||||
'Content-Type': 'application/json',
|
||||
},
|
||||
method: 'POST',
|
||||
body: JSON.stringify(data),
|
||||
});
|
||||
return await r.json();
|
||||
}
|
||||
|
||||
send_init(ws: WebSocket) {
|
||||
let payload: ExtendedMessage;
|
||||
if (this.lastStatus) {
|
||||
payload = this.lastStatus;
|
||||
} else {
|
||||
payload = { init: null, printer: this.slug, name: this.name };
|
||||
}
|
||||
ws.send(JSON.stringify(payload));
|
||||
}
|
||||
}
|
||||
145
server/server.ts
145
server/server.ts
@ -1,22 +1,16 @@
|
||||
import * as fs from 'fs';
|
||||
import * as path from 'path';
|
||||
|
||||
import * as express from 'express';
|
||||
import fetch from 'node-fetch';
|
||||
import * as httpProxy from 'http-proxy';
|
||||
import * as WebSocket from 'ws';
|
||||
import * as yaml from 'js-yaml';
|
||||
import * as expressWs from 'express-ws';
|
||||
import * as WebSocket from 'ws';
|
||||
|
||||
import * as messages from '../types/messages';
|
||||
import * as octoprint from '../types/octoprint';
|
||||
import { ExtendedMessage } from '../types/messages';
|
||||
import OctoPrintConnection from './OctoPrintConnection';
|
||||
|
||||
const PORT = process.env.PORT || 1234;
|
||||
|
||||
const PING_TIME = 10000;
|
||||
|
||||
type Timeout = ReturnType<typeof setTimeout>;
|
||||
|
||||
type configuration = {
|
||||
printers: {
|
||||
[key: string]: { address: string; apikey: string };
|
||||
@ -33,7 +27,7 @@ proxy.on('error', function (e) {
|
||||
console.error('Proxy failed:');
|
||||
console.error(e);
|
||||
});
|
||||
let printerStatuses: PrinterStatus[] = [];
|
||||
let octoprintConnections: OctoPrintConnection[] = [];
|
||||
|
||||
function broadcast(data: WebSocket.Data) {
|
||||
wsInstance.getWss().clients.forEach((client: WebSocket) => {
|
||||
@ -43,7 +37,7 @@ function broadcast(data: WebSocket.Data) {
|
||||
});
|
||||
}
|
||||
|
||||
function broadcastPayload(payload: messages.ExtendedMessage) {
|
||||
function broadcastPayload(payload: ExtendedMessage) {
|
||||
broadcast(JSON.stringify(payload));
|
||||
}
|
||||
|
||||
@ -51,12 +45,12 @@ const wsInstance = expressWs(express());
|
||||
const app = wsInstance.app;
|
||||
|
||||
app.ws('/ws', function (ws, req) {
|
||||
printerStatuses.forEach((ps: PrinterStatus) => ps.send_init(ws));
|
||||
octoprintConnections.forEach((op: OctoPrintConnection) => op.send_init(ws));
|
||||
});
|
||||
|
||||
app.get('/webcam/:printer', (req, res) => {
|
||||
let printer: PrinterStatus | undefined = printerStatuses.find(
|
||||
(p) => p.slug === req.params.printer
|
||||
let printer: OctoPrintConnection | undefined = octoprintConnections.find(
|
||||
(op) => op.slug === req.params.printer
|
||||
);
|
||||
if (printer?.webcamURL) {
|
||||
req.url = ''; // truncate the url for passing to the proxy
|
||||
@ -66,129 +60,10 @@ app.get('/webcam/:printer', (req, res) => {
|
||||
|
||||
app.listen(PORT);
|
||||
|
||||
class PrinterStatus {
|
||||
slug: string;
|
||||
address: string;
|
||||
apikey: string;
|
||||
|
||||
webcamURL?: URL;
|
||||
name?: string;
|
||||
lastStatus?: messages.ExtendedMessage;
|
||||
|
||||
constructor(slug: string, address: string, apikey: string) {
|
||||
this.slug = slug;
|
||||
this.address = address;
|
||||
this.apikey = apikey;
|
||||
|
||||
this.try_connect_websocket();
|
||||
}
|
||||
|
||||
try_connect_websocket() {
|
||||
this.connect_websocket().catch((e) => {
|
||||
console.error(
|
||||
`Failed to connect to "${this.slug}", attempting reconnection in 5 seconds`
|
||||
);
|
||||
console.error(e);
|
||||
setTimeout(() => this.try_connect_websocket(), 5000);
|
||||
});
|
||||
}
|
||||
|
||||
async connect_websocket() {
|
||||
const settings = await this.api_get('settings');
|
||||
this.webcamURL = new URL(settings.webcam.streamUrl, this.address);
|
||||
this.name = settings.appearance.name;
|
||||
|
||||
// do passive login to get a session key from the API key
|
||||
const login: octoprint.LoginResponse = await this.api_post('login', {
|
||||
passive: 'true',
|
||||
});
|
||||
const session_key = login.name + ':' + login.session;
|
||||
|
||||
let pingSender: ReturnType<typeof setInterval>;
|
||||
let pongTimeout: Timeout;
|
||||
|
||||
const url = new URL('/sockjs/websocket', this.address);
|
||||
url.protocol = 'ws';
|
||||
let websocket = new WebSocket(url.toString());
|
||||
websocket
|
||||
.on('open', () => {
|
||||
pingSender = setInterval(() => websocket.ping(), PING_TIME);
|
||||
pongTimeout = this.heartbeat(websocket, pongTimeout);
|
||||
|
||||
console.log(`Connected to "${this.slug}"`);
|
||||
websocket.send(JSON.stringify({ auth: session_key }));
|
||||
})
|
||||
.on('message', (data: WebSocket.Data) => {
|
||||
const event: octoprint.Message = JSON.parse(data as string);
|
||||
|
||||
let ext_event: messages.ExtendedMessage = {
|
||||
...event,
|
||||
printer: this.slug,
|
||||
name: this.name,
|
||||
};
|
||||
broadcastPayload(ext_event);
|
||||
|
||||
if ('current' in event || 'history' in event) {
|
||||
this.lastStatus = ext_event;
|
||||
}
|
||||
})
|
||||
.on('pong', () => {
|
||||
pongTimeout = this.heartbeat(websocket, pongTimeout);
|
||||
})
|
||||
.on('close', () => {
|
||||
clearInterval(pingSender);
|
||||
clearTimeout(pongTimeout);
|
||||
|
||||
console.log(
|
||||
`Lost connection to "${this.slug}", attempting reconnection in 5 seconds`
|
||||
);
|
||||
setTimeout(() => this.try_connect_websocket(), 5000);
|
||||
});
|
||||
}
|
||||
|
||||
heartbeat(websocket: WebSocket, pongTimeout: Timeout): Timeout {
|
||||
clearTimeout(pongTimeout);
|
||||
return setTimeout(() => {
|
||||
console.log(`Missed 2 heartbeats for "${this.slug}", disconnecting`);
|
||||
websocket.terminate();
|
||||
}, PING_TIME * 2);
|
||||
}
|
||||
|
||||
async api_get(endpoint: string): Promise<any> {
|
||||
const r = await fetch(new URL('/api/' + endpoint, this.address), {
|
||||
headers: { 'X-Api-Key': this.apikey },
|
||||
});
|
||||
return await r.json();
|
||||
}
|
||||
|
||||
async api_post(endpoint: string, data: any): Promise<any> {
|
||||
const r = await fetch(new URL('/api/' + endpoint, this.address), {
|
||||
headers: {
|
||||
'X-Api-Key': this.apikey,
|
||||
Accept: 'application/json',
|
||||
'Content-Type': 'application/json',
|
||||
},
|
||||
method: 'POST',
|
||||
body: JSON.stringify(data),
|
||||
});
|
||||
return await r.json();
|
||||
}
|
||||
|
||||
send_init(ws: WebSocket) {
|
||||
let payload: messages.ExtendedMessage;
|
||||
if (this.lastStatus) {
|
||||
payload = this.lastStatus;
|
||||
} else {
|
||||
payload = { init: null, printer: this.slug, name: this.name };
|
||||
}
|
||||
ws.send(JSON.stringify(payload));
|
||||
}
|
||||
}
|
||||
|
||||
function initPrinters() {
|
||||
printerStatuses = Object.entries(config.printers).map(
|
||||
octoprintConnections = Object.entries(config.printers).map(
|
||||
([slug, printer]) =>
|
||||
new PrinterStatus(slug, printer.address, printer.apikey)
|
||||
new OctoPrintConnection(slug, printer.address, printer.apikey, broadcastPayload)
|
||||
);
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user