177 lines
4.3 KiB
JavaScript
177 lines
4.3 KiB
JavaScript
import fetch from "node-fetch";
|
|
import WebSocket from "ws";
|
|
import * as logger from "./logger.js";
|
|
import { setTimeout } from "timers/promises";
|
|
|
|
/*
|
|
Rerror 0x01
|
|
Tqueue 0x02
|
|
Rqueue 0x03
|
|
Tcancel 0x04
|
|
Rcancel 0x05
|
|
Twait 0x06
|
|
Rwait 0x07
|
|
Rinit 0x08
|
|
*/
|
|
const Rerror = 0x01;
|
|
const Tqueue = 0x02;
|
|
const Rqueue = 0x03;
|
|
const Tcancel = 0x04;
|
|
const Rcancel = 0x05;
|
|
const Twait = 0x06;
|
|
const Rwait = 0x07;
|
|
const Rinit = 0x08;
|
|
|
|
class ImageConnection {
|
|
constructor(host, auth, tls = false) {
|
|
this.requests = new Map();
|
|
if(!host.includes(":")){
|
|
host += ":3762";
|
|
}
|
|
this.host = host;
|
|
this.auth = auth;
|
|
this.tag = null;
|
|
this.disconnected = false;
|
|
this.njobs = 0;
|
|
this.max = 0;
|
|
this.formats = {};
|
|
this.wsproto = null;
|
|
if (tls) {
|
|
this.wsproto = "wss";
|
|
} else {
|
|
this.wsproto = "ws";
|
|
}
|
|
this.sockurl = `${this.wsproto}://${host}/sock`;
|
|
let headers = {};
|
|
if(auth){
|
|
headers.Authentication = auth;
|
|
}
|
|
this.conn = new WebSocket(this.sockurl, {headers});
|
|
let httpproto;
|
|
if (tls) {
|
|
httpproto = "https";
|
|
} else {
|
|
httpproto = "http";
|
|
}
|
|
this.httpurl = `${httpproto}://${host}/image`;
|
|
this.conn.on("message", (msg) => this.onMessage(msg));
|
|
this.conn.once("error", (err) => this.onError(err));
|
|
this.conn.once("close", () => this.onClose());
|
|
}
|
|
|
|
onMessage(msg) {
|
|
const op = msg.readUint8(0);
|
|
if (op === Rinit) {
|
|
this.max = msg.readUint16LE(3);
|
|
this.njobs = msg.readUint16LE(5);
|
|
this.formats = JSON.parse(msg.toString("utf8", 7));
|
|
return;
|
|
}
|
|
const tag = msg.readUint16LE(1);
|
|
const promise = this.requests.get(tag);
|
|
if (!promise) {
|
|
logger.error(`Received response for unknown request ${tag}`);
|
|
return;
|
|
}
|
|
this.requests.delete(tag);
|
|
if (op === Rqueue) this.njobs++;
|
|
if (op === Rcancel || op === Rwait) this.njobs--;
|
|
if (op === Rerror) {
|
|
this.njobs--;
|
|
promise.reject(new Error(msg.slice(3, msg.length).toString()));
|
|
return;
|
|
}
|
|
promise.resolve();
|
|
}
|
|
|
|
onError(e) {
|
|
logger.error(e.toString());
|
|
}
|
|
|
|
async onClose() {
|
|
for (const [tag, obj] of this.requests.entries()) {
|
|
obj.reject("Request ended prematurely due to a closed connection");
|
|
this.requests.delete(tag);
|
|
if (obj.op === Twait || obj.op === Tcancel) this.njobs--;
|
|
}
|
|
//this.requests.clear();
|
|
if (!this.disconnected) {
|
|
logger.warn(`Lost connection to ${this.host}, attempting to reconnect in 5 seconds...`);
|
|
await setTimeout(5000);
|
|
this.conn = new WebSocket(this.sockurl, {
|
|
headers: {
|
|
"Authentication": this.auth
|
|
}
|
|
});
|
|
this.conn.on("message", (msg) => this.onMessage(msg));
|
|
this.conn.once("error", (err) => this.onError(err));
|
|
this.conn.once("close", () => this.onClose());
|
|
}
|
|
this.disconnected = false;
|
|
}
|
|
|
|
close() {
|
|
this.disconnected = true;
|
|
this.conn.close();
|
|
}
|
|
|
|
queue(jobid, jobobj) {
|
|
const str = JSON.stringify(jobobj);
|
|
const buf = Buffer.alloc(4);
|
|
buf.writeUint32LE(jobid);
|
|
return this.do(Tqueue, jobid, Buffer.concat([buf, Buffer.from(str)]));
|
|
}
|
|
|
|
wait(jobid) {
|
|
const buf = Buffer.alloc(4);
|
|
buf.writeUint32LE(jobid);
|
|
return this.do(Twait, jobid, buf);
|
|
}
|
|
|
|
cancel(jobid) {
|
|
const buf = Buffer.alloc(4);
|
|
buf.writeUint32LE(jobid);
|
|
return this.do(Tcancel, jobid, buf);
|
|
}
|
|
|
|
async getOutput(jobid) {
|
|
const req = await fetch(`${this.httpurl}?id=${jobid}`, {
|
|
headers: {
|
|
"Authentication": this.auth || undefined
|
|
}
|
|
});
|
|
const contentType = req.headers.get("Content-Type");
|
|
let type;
|
|
switch (contentType) {
|
|
case "image/gif":
|
|
type = "gif";
|
|
break;
|
|
case "image/png":
|
|
type = "png";
|
|
break;
|
|
case "image/jpeg":
|
|
type = "jpg";
|
|
break;
|
|
case "image/webp":
|
|
type = "webp";
|
|
break;
|
|
}
|
|
return { buffer: Buffer.from(await req.arrayBuffer()), type };
|
|
}
|
|
|
|
async do(op, id, data) {
|
|
const buf = Buffer.alloc(1 + 2);
|
|
let tag = this.tag++;
|
|
if (tag > 65535) tag = this.tag = 0;
|
|
buf.writeUint8(op);
|
|
buf.writeUint16LE(tag, 1);
|
|
this.conn.send(Buffer.concat([buf, data]));
|
|
const promise = new Promise((resolve, reject) => {
|
|
this.requests.set(tag, { resolve, reject, id, op });
|
|
});
|
|
return promise;
|
|
}
|
|
}
|
|
|
|
export default ImageConnection;
|