adam.goldsmith/PrinterStatus
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Code Issues 1 Releases Wiki Activity

Don't break when printers are not accessible during server startup

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This commit is contained in:
Adam Goldsmith 2021-10-28 01:06:42 -04:00
parent 8c18460995
commit 51d3cbf41e
1 changed files with 33 additions and 22 deletions
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37
server/server.ts
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@ -69,6 +69,7 @@ class PrinterStatus {
webcamURL?: URL;
name?: string;
session_key?: string;
websocket?: WebSocket;
lastStatus?: messages.ExtendedMessage;
@ -78,15 +79,17 @@ class PrinterStatus {
this.address = address;
this.apikey = apikey;
try {
this.init(); // async init
} catch (e) {
throw 'Failed to Init' + e;
}
// async init
this.connect_websocket().catch((e) => {
console.error('Failed to initialize "${this.slug}"');
throw e;
});
}
async init() {
// TODO: error handling (try/catch)
async connect_websocket() {
// initial setup
if (!this.session_key) {
try {
const settings = await this.api_get('settings');
this.webcamURL = new URL(settings.webcam.streamUrl, this.address);
this.name = settings.appearance.name;
@ -95,17 +98,23 @@ class PrinterStatus {
const login: octoprint.LoginResponse = await this.api_post('login', {
passive: 'true',
});
this.connect_websocket(login.name + ':' + login.session);
this.session_key = login.name + ':' + login.session;
} catch {
console.log(
`Failed to connect to "${this.slug}" attempting reconnection in 5 seconds`
);
setTimeout(() => this.connect_websocket(), 5000);
return;
}
}
connect_websocket(authToken: string): void {
const url = new URL('/sockjs/websocket', this.address);
url.protocol = 'ws';
this.websocket = new WebSocket(url.toString());
this.websocket
.on('open', () => {
this.websocket!.send(JSON.stringify({ auth: authToken }));
console.log(`Connected to "${this.slug}"`);
this.websocket!.send(JSON.stringify({ auth: this.session_key }));
})
.on('message', (data: WebSocket.Data) => {
const event: octoprint.Message = JSON.parse(data as string);
@ -122,8 +131,10 @@ class PrinterStatus {
}
})
.on('close', () => {
console.log('Lost connection to ' + this.slug + ' reconnecting...');
setTimeout(() => this.connect_websocket(authToken), 5000);
console.log(
`Lost connection to "${this.slug}" attempting reconnection in 5 seconds`
);
setTimeout(() => this.connect_websocket(), 5000);
});
}