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).
$ yarn add pupperender
const express = require('express');
const pupperender = require('pupperender');
const app = express();
app.use(pupperender.makeMiddleware({}));
app.use(express.static('files'));
app.listen(8080);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. |
MIT © LasaleFamine