vsalomaki / prerender-alpine

Lightweight Prerender container built on Alpine Linux with Node and Headless Chrome

Prerender Alpine

Lightweight Prerender container built on Alpine Linux with Node and Headless Chromium.

• Prerender 5.20.0
• Chromium 99.0.4844.84
• Node 16.15.0

This package includes https://github.com/kenylieou/prerender-request-blacklist

Requirements

• Docker

Usage

Pull and run the image:

docker pull tvanro/prerender-alpine:6.5.0
docker run -p 3000:3000 tvanro/prerender-alpine:6.5.0

Prerender will now be running on http://localhost:3000. Try the container out with curl:

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

Prerender plugins

A few default plugins have been activated by default (see server.js):

• https://github.com/prerender/prerender/blob/master/lib/plugins/blacklist.js
• https://github.com/prerender/prerender/blob/master/lib/plugins/httpHeaders.js
• https://github.com/prerender/prerender/blob/master/lib/plugins/removeScriptTags.js

This can be modified by creating your own server.js and mounting this file as a docker volume:

docker run -p 3000:3000 -v $(pwd)/server.js:/home/node/server.js tvanro/prerender-alpine:6.5.0 

Prerender memory cache

The prerender-memory-cache plugin is not activated by default. You can activate it with the environment variable MEMORY_CACHE=1.

You can customize cache behavior with environment variables :

• CACHE_MAXSIZE=1000 : max number of objects in cache
• CACHE_TTL=6000 : time to live in seconds

docker run -p 3000:3000 -e MEMORY_CACHE=1 -e CACHE_MAXSIZE=1000 -e CACHE_TTL=6000 tvanro/prerender-alpine:6.5.0 

Options

Possibility to add domain redirects from environment variable like this:

MAP_DOMAIN_TO_LOCALHOST=example.com,host.docker.internal

This will cause chromium to resolve *.example.com to host.docker.internal. Wildcard is added automatically.

List of blacklist data separated by ,

export BLACKLISTED_EXTS=css,jpg
export BLACKLISTED_DOMAIN=google.com
export BLACKLISTED_MATCH=regex_pattern

For example:

export BLACKLISTED_EXTS=ico,jpg,jpeg,png,ttf,eot,otf,woff,woff2,gif,svg,pdf,css,svg
export BLACKLISTED_DOMAIN=www.googletagmanager.com,googletagmanager.com,www.google-analytics.com,google-analytics.com,connect.facebook.net,lc.iadvize.com,fonts.gstatic.com,gstatic.com,i.ytimg.com,www.youtube.com,vimeo.com,www.vimeo.com,baidu.com,f.vimeocdn.com,fresnel.vimeocdn.com,player.vimeo.com,i.vimeocdn.com,youtube.com,player.youtube.com,stats.g.doubleclick.net,static.iadvize.com,api.iadvize.com
export BLACKLISTED_MATCH=^[^ignore]+$
export MAP_DOMAIN_TO_LOCALHOST=example.com,localhost

Prerender documentation

Check out the official Prerender documentation: https://github.com/prerender/prerender