node-screenshot-machine

Simple node.js wrapper for Screenshot Machine's API.

API

Screenshot Machine provides a very simple url-based API, with config options passed as optional url params. This library provides a convenient, node-ish wrapper that makes using Screenshot Machine in your node app a snap.

Installation

Run npm install node-screenshot-machine

or git clone then npm install

Optionally run unit tests: npm test

Setup

Initializing the node-screenshot-machine module is simple:

var screenshot = require('node-screenshot-machine')({
  key: ***** // your screenshotmachine API key
});

Capture

Capturing a website screenshot is also simple:

screenshot.get(options, callback);

The module handles standard callback-style invocation:

screenshot.get({
  url: 'www.test.com'
},
function(err, result){
  if (err) {
    // handle error
  }
  // handle result
});

as well as promise-style:

screenshot.get({
  url: 'www.test.com'
})
.then(function(result){
  // handle result
})
.catch(function(err){
  // handle error
});

For ease of use, you can also simply pass in a url string, which will capture a screenshot using the default settings (or any settings passed in during setup):

screenshot.get('www.test.com')
.then(function(result){
  // handle result
})
.catch(function(err){
  // handle error
});

Options

These are all the options supported by the .get method (complete details can be found in Screenshot Machine's API guide):

Required

• url: The web page to capture a screenshot for

Optional

• size: Captured image size (defaults to 'T' - 120 x 90px)
• format: Image file format (defaults to 'JPG')
• hash: MD5 hash used for security purposes when called from a web page (defaults to blank)
• cacheLimit: How many days to allow images from cache (defaults to 14 days)
• timeout: Capture timeout (defaults to 200ms)

Streaming

Note that the screenshot.get method optionally supports streaming the captured image directly to any writable stream using the optional writeStream option:

var imageFileStream = require('fs').createWriteStream('siteImage.png');

screenshot.get({
  url: 'www.someurl.com',
  format: 'PNG',
  writeStream: imageFileStream
});

License

MIT

Copyright © 2015 Level Seven

Contributors

• Kevin Moritz
• Brian Moeskau
• Todd Bluhm