Pupperender NPM

pupperender

ExpressJs middleware for rendering PWA to bots using Puppeteer

This is a middleware for ExpressJs that uses Puppeter for render the page requested by "indexing" bots (and not).

This is a fork of the rendertron-middleware but using Puppeter instead of Rendertron, without needing another server to render the app. I have made some changes for my personal use (like removing the inject ShadyDOM option).

Install

$ yarn add pupperender

Usage

const express = require('express');
const pupperender = require('pupperender');

const app = express();

app.use(pupperender.makeMiddleware({}));

app.use(express.static('files'));
app.listen(8080);

Configuration

Like rendertron-middleware I decided to expose a makeMiddleware function that takes a configuration object with the following properties:

Property	Default	Description
`userAgentPattern`	A set of known bots that benefit from pre-rendering. Full list.	RegExp for matching requests by User-Agent header.
`excludeUrlPattern`	A set of known static file extensions. Full list.	RegExp for excluding requests by the path component of the URL.
`timeout`	`11000`	Millisecond timeout for waiting the page to load. Used by Puppeter. See also the Puppeter waitFor()
`debug`	`false`	DEBUG flag to show some logs
`useCache`	`false`	If the puppeterized content should be cached to speed up subsequent requests.
`cacheTTL`	`3600`	Seconds until cached content is disregarded and puppeterized again. Only considered when `useCache` is `true`.