96 lines
2.5 KiB
TypeScript
96 lines
2.5 KiB
TypeScript
import * as plugins from './smartssr.plugins';
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import * as paths from './smartssr.paths';
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import { serializeFunction } from './smartssr.function.serialize';
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export interface ISmartSSROptions {
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debug: boolean;
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}
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/**
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*
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*/
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export class SmartSSR {
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public options: ISmartSSROptions;
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constructor(optionsArg?: ISmartSSROptions) {
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this.options = {
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...{
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debug: false,
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},
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...optionsArg,
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};
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}
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public async renderPage(urlArg: string) {
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const overallTimeMeasurement = new plugins.smarttime.HrtMeasurement();
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overallTimeMeasurement.start();
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const resultDeferred = plugins.smartpromise.defer<string>();
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const browser = new plugins.smartpuppeteer.IncognitoBrowser();
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const renderTimeMeasurement = new plugins.smarttime.HrtMeasurement();
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let renderedPageString: string;
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let screenshotBuffer: Buffer;
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await browser.start();
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try {
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const context = await browser.getNewIncognitoContext();
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const page = await context.newPage();
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// lets protect against left open tabs
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plugins.smartdelay.delayFor(30000).then(async () => {
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try {
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await browser.stop();
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} catch {}
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});
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page.on('console', (msg) => {
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console.log(`${urlArg}: ${msg.text()}`);
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});
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renderTimeMeasurement.start();
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await page.goto(urlArg, {
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waitUntil: 'networkidle2',
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timeout: 30000,
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});
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if (this.options.debug) {
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screenshotBuffer = await page.screenshot({
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encoding: 'binary',
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}) as Buffer;
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}
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await page.$eval('body', serializeFunction);
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const pageContent = await page.content();
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renderedPageString = pageContent;
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resultDeferred.resolve(renderedPageString);
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renderTimeMeasurement.stop();
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// lets clean up async
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await page.close();
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await context.close();
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} catch (e) {
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console.log(e);
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}
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await browser.stop();
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overallTimeMeasurement.stop();
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console.log(
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`Overall it took ${overallTimeMeasurement.milliSeconds} milliseconds to render ${urlArg}`
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);
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console.log(
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`The rendering alone took ${renderTimeMeasurement.milliSeconds} milliseconds for ${urlArg}`
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);
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// debug
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if (this.options.debug) {
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plugins.smartfile.memory.toFsSync(
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renderedPageString,
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plugins.path.join(paths.noGitDir, 'test.html')
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);
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const fs = await import('fs');
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fs.writeFileSync(plugins.path.join(paths.noGitDir, 'test.png'), screenshotBuffer);
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}
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return resultDeferred.promise;
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}
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}
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