import * as plugins from './smartpdf.plugins'; import * as paths from './smartpdf.paths'; import { Server } from 'http'; import { PdfCandidate } from './smartpdf.classes.pdfcandidate'; declare const document; export interface IPdfResult { name: string, id: string, buffer: Buffer; } export class SmartPdf { htmlServerInstance: Server; serverPort: number; headlessBrowser: plugins.puppeteer.Browser; private _readyDeferred: plugins.smartpromise.Deferred; private _candidates: { [key: string]: PdfCandidate } = {}; constructor() { this._readyDeferred = new plugins.smartpromise.Deferred(); } async start() { // setup puppeteer this.headlessBrowser = await plugins.puppeteer.launch(); // setup server const app = plugins.express(); app.get('/:pdfId', (req, res) => { res.setHeader('PDF-ID', this._candidates[req.params.pdfId].pdfId); res.send(this._candidates[req.params.pdfId].htmlString); }); this.htmlServerInstance = plugins.http.createServer(app); const smartnetworkInstance = new plugins.smartnetwork.SmartNetwork(); const portAvailable = smartnetworkInstance.isLocalPortAvailable(3210); this.htmlServerInstance.listen(3210, 'localhost'); this.htmlServerInstance.on('listening', () => { this._readyDeferred.resolve(); }); } async stop() { const done = plugins.smartpromise.defer(); this.htmlServerInstance.close(() => { done.resolve(); }); await this.headlessBrowser.close(); await done.promise; } /** * returns a pdf for a given html string; */ async getPdfForHtmlString(htmlStringArg: string): Promise { await this._readyDeferred.promise; const pdfCandidate = new PdfCandidate(htmlStringArg); this._candidates[pdfCandidate.pdfId] = pdfCandidate; const page = await this.headlessBrowser.newPage(); const response = await page.goto(`http://localhost:3210/${pdfCandidate.pdfId}`, { waitUntil: 'networkidle2' }); const headers = response.headers(); if (headers['pdf-id'] !== pdfCandidate.pdfId) { console.log('Error! Headers do not match. For security reasons no pdf is being emitted!'); return; } else { console.log(`id security check passed for ${pdfCandidate.pdfId}`); } const pdfBuffer = await page.pdf({ format: 'A4' }); await page.close(); delete this._candidates[pdfCandidate.pdfId]; pdfCandidate.doneDeferred.resolve(); await pdfCandidate.doneDeferred.promise; return { id: pdfCandidate.pdfId, name: `${pdfCandidate.pdfId}.js`, buffer: pdfBuffer } } async getPdfForWebsite(websiteUrl: string): Promise { const page = await this.headlessBrowser.newPage(); page.emulateMedia('screen'); const response = await page.goto(websiteUrl, { waitUntil: 'networkidle2' }); const pdfId = plugins.smartunique.shortId(); const pdfBuffer = await page.pdf({ format: 'A4', printBackground: true, displayHeaderFooter: false, preferCSSPageSize: true }); await page.close(); return { id: pdfId, name: `${pdfId}.js`, buffer: pdfBuffer } } async getFullWebsiteAsSinglePdf(websiteUrl: string) { const page = await this.headlessBrowser.newPage(); page.emulateMedia('screen'); const response = await page.goto(websiteUrl, { waitUntil: 'networkidle2' }); const pdfId = plugins.smartunique.shortId(); const {documentHeight, documentWidth} = await page.evaluate(() => { return { documentHeight: document.height, documentWidth: document.width }; }); const pdfBuffer = await page.pdf({ height: documentWidth, width: documentWidth, printBackground: true, displayHeaderFooter: false, preferCSSPageSize: true }); await page.close(); return { id: pdfId, name: `${pdfId}.js`, buffer: pdfBuffer } } }