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base.mjs
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base.mjs
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import puppeteer from 'puppeteer'
const MAX_THREAD = 3
class Pin { }
let pins = [];
let browser
export default class {
async init() {
if (browser) {
return;
}
browser = await puppeteer.launch({
headless: false,
timeout: 0
});
}
async initPuppeteerInstance() {
let nowLength = pins.length;
let newLength = nowLength + 1;
if (newLength <= MAX_THREAD) {
let node = new Pin();
pins.push(node);
return browser.newPage().then(el => {
node.ins = el;
node.inUse = true;
node.ins.setDefaultTimeout(0)
return node;
});
} else {
let handle;
return new Promise(resolve => {
handle = setInterval(_ => {
let node = [...pins].filter(el => el.inUse === false).shift();
if (node !== undefined) {
node.inUse = true;
clearInterval(handle);
resolve(node);
}
}, 200);
});
}
}
async close() {
await browser.close();
}
}