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GO Prerender

Inspired by https://github.com/goprerender/prerender

GO Prerender is a dockerized server app written in Golang that uses Headless Chrome to render HTML and JS files out of any web page. The Prerender server listens for a http request, takes the URL and loads it in Headless Chrome, waits for the page to finish loading by waiting for the network to be idle, and then returns your content.

In memory cache

It caches pages in memory using prerender storage container.

Installation

  • clone repository
  • run make init
  • configure .env and docker-compose.yml to fit your needs or use the default.
  • run make up - this will build and start docker containers

Development

Run make build-server to build server Go application.
Run make build-storage to build storage Go application.
Run make build to build both Go applications server and storage.

Usage

To run docker compose stack just run make up.

To prerender some URL you need to specify it as a query parameter, like this:

http://localhost:3000/render?url=https://www.example.com/

Clear cache

Cached pages are valid for 7 days by default, but you can force clear it.

To purge all cached pages you need to send theClear-Site-Data header with the value *. To remove only one page from cache, just pass Cache-Control header with the value must-revalidate.

Just send a usual request to

http://localhost:3000/render?url=https://www.example.com/

With this header, to remove the cached page

Cache-Control: must-revalidate

or, to flush all cache

Clear-Site-Data: *