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A simple screenshot web service powered by Express and node-webkit.
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README.md

⚠️ This is no longer maintained ⚠️

A simple screenshot web service powered by Kue, Express and electron. Inspired by fzaninotto/screenshot-as-a-service

This screenshot-service is using node-webkit which comes with a recent version of Chromium. In contrast to phantomjs node-webkit supports 3D CSS and WebGL and therefore can produce better screenshots.

Example

See this DEMO (Be aware that it is running on a $5 digitalocean machine. Be patient!)

Requirements

  1. node-webkit in PATH
  2. node
  3. redis

Things you should know

On OS X the node-webkit executable is called node-webkit and on linux and Windows it's called nw. Keep that in mind.

Running

  1. git clone https://github.com/FWeinb/nodeshot.git && cd nodeshot
  2. Bootstrap the project ./bootstrap.sh
  3. Start/Install redis
  4. Run ./start.sh server once
  5. Run ./start.sh renderer X where X is is the number/name of the renderer. (You can start more than one)
  6. Open http://localhost:8080/?url=http://s.codepen.io/FWeinb/fullpage/oyACz
  7. See http://localhost:8080/kue for queued jobs. (See the password in nodeshot-server/config/default.yaml.)

API Usage

Simple API

The result of each request will be the requested image.

Take a screenshot

GET /?url=www.google.com

Returns a 1024x600 PNG screenshot of the www.google.com homepage

Take a screenshot with transparency

GET /?url=www.google.com&transparent=true

Returns a 1024x600 PNG screenshot of the www.google.com homepage

Take a screenshot of the whole page

GET /?url=www.google.com&page=true

Returns a screenshot of the whole www.google.com homepage

Custom viewport size

GET /?url=www.google.com&width=800&height=600

Returns a 800x600 PNG screenshot of the www.google.com homepage

Screenshot delay

GET /?url=www.google.com&delay=1000

Returns a 1024x600 PNG screenshot of the www.google.com homepage 1 second after it's loaded

Force cache reload

GET /?url=www.google.com&forceReload=1

Deletes current version in cache and returns a (new) 1024x600 PNG screenshot of the www.google.com homepage, which will be cached again

Ajax API

The result of each request will be an JSON object.

Same options as in the Simple API. Just prefix the request with /ajax/

Example:

# Take a screenshot
GET /ajax/?url=www.google.com
# Success: 200 {"request" : "success", "url" : "[URL to resulting image]"}
# Error: 500 {"request" : "failed", "reason" : "[Message]"}

Configuration

This project is using node-config.

Extended configuration

node-webkit can pass startup flags to chromium via the chromium-args value in the package.json. See node-webkit manifest-format for more information.

CAUTION

Please change the default password in nodeshot-server/config/default.yaml

Using a headless node-webkit via xvfb

DISCLAIMER: For WebGL/3D CSS support you need hardware acceleration. Keep that in mind!

Get a VM (optional)

  1. Go to https://www.digitalocean.com/
  2. Create a $5 droplet with Ubuntu
  3. Login via ssh

Installing xvfb

  1. Install minmal xorg sudo apt-get install xorg
  2. Install xvfb sudo apt-get install xvfb
  3. Install fonts sudo apt-get install xfonts-100dpi xfonts-75dpi xfonts-scalable xfonts-cyrillic
  4. Install ttf fonts sudo apt-get install -y x-ttcidfont-conf cabextract ttf-mscorefonts-installer (Accept the EULA)
  5. Reconfigure fonts sudo dpkg-reconfigure --default-priority x-ttcidfont-conf (This fixed an issue for me)
  6. Start xvfb on display :99 xvfb :99 &
  7. Make :99 the default display export DISPLAY=:99

Installing node-webkit and screenshot-service

  1. Download node-webkit and put it on PATH
  2. Start/Install redis
  3. Get this repo git clone https://github.com/fweinb/nodeshot && cd nodeshot
  4. Bootstrap the project ./bootstrap.sh
  5. Run ./start.sh server once
  6. Run ./start.sh renderer X where X is is the number/name of the renderer. (You can start more than one)
  7. Open http://[IP]:8080/?url=http://s.codepen.io/FWeinb/fullpage/oyACz

Thanks to

Joshua Hibbert for creating the logo.

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