ws-screenshot

A simple way to take a screenshot of a website by providing its URL. ws-screenshot include a simple web UI but also a REST API and a Websocket API to automate screenshots.

DEMO: https://backup15.terasp.net/

 

Quickstart with Docker

Run once:

docker pull elestio/ws-screenshot.slim
docker run -p 3000:3000 -it elestio/ws-screenshot.slim

or Run as a docker service:

docker run --name ws-screenshot -d --restart always -p 3000:3000 -it elestio/ws-screenshot.slim

Then open http://yourIP:3000/ in your browser

 

Requirements

• Linux, Windows or Mac OS
• Node 12+

Install Node.js 16

sudo apt -y install curl dirmngr apt-transport-https lsb-release ca-certificates
curl -sL https://deb.nodesource.com/setup_16.x | sudo -E bash -
sudo apt -y install nodejs

Clone this repository

Clone this repo then install NPM dependencies for ws-screenshot:

git clone git@github.com:elestio/ws-screenshot.git
cd ws-screenshot
npm install

Install required dependencies for chrome:

./installPuppeteerNativeDeps.sh

 

Run ws-screenshot

Run directly

Finally we can start WS-SCREENSHOT Server one-time:

./run.sh

or run as a service with pm2

npm install -g pm2
pm2 start run.sh --name ws-screenshot
pm2 save

Run with docker (local version for dev)

Run just once

docker build -t ws-screenshot .
docker run --rm -p 3000:3000 -it ws-screenshot

Run as a docker service

docker run --name ws-screenshot -d --restart always -p 3000:3000 -it ws-screenshot

Run on Kubernetes

Run with helm

helm upgrade --install ws-screenshot --namespace ws-screenshot helm/

Run with proxy

Add PROXY_SERVER env variable:

docker run --rm -p 3000:3000 --env PROXY_SERVER=socks5://host:port -it ws-screenshot

NOTE: Chromium ignores username and password in --proxy-server arg

https://bugs.chromium.org/p/chromium/issues/detail?id=615947

 

Usage

REST API

Make a GET request (or open the url in your browser):

/api/screenshot?resX=1280&resY=900&outFormat=jpg&isFullPage=false&url=https://vms2.terasp.net&headers={"foo":"bar"}

Websocket API

var event = {
  cmd: "screenshot",
  url: url,
  originalTS: (+new Date()),
  resX: resX,
  resY: resY,
  outFormat: outFormat,
  isFullPage: isFullPage,
  headers: {
    foo: 'bar'
  }
};

You can check /public/js/client.js and /public/index.html for a sample on how to call the Websocket API

 

Supported parameters

• url: full url to screenshot, must start with http:// or https://
• resX: integer value for screen width, default: 1280
• resY: integer value for screen height, default: 900
• outFormat: output format, can be jpg, png or pdf, default: jpg
• isFullPage: true or false, indicate if we should scroll the page and make a full page screenshot, default: false
• waitTime: integer value in milliseconds, indicate max time to wait for page resources to load, default: 100
• headers: add extra headers to the request

 

Protect with an ApiKey

You can protect the REST & WS APIs with an ApiKey, this is usefull if you want to protect your screenshot server from being used by anyone To do that, open appconfig.json and set any string like a GUID in ApiKey attribute. This will be your ApiKey to pass to REST & WS APIs

To call the REST API with an ApiKey:

/api/screenshot?url=https://example.com&apiKey=XXXXXXXXXXXXX

To call the Websocket API with an ApiKey:

var event = {
  cmd: "screenshot",
  url: url,
  originalTS: (+new Date()),
  apiKey: "XXXXXXXXXXXXX"
};

You can check /public/js/client.js for a sample on how to call the Websocket API

TODO list

• Add support for cookies / localstorage auth (to be able to screenshot authenticated pages)