phanshot
v1.2.1
Published
Create screenshots on the server using NodeJS & Phantom
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phanshot
Easy to use server-side screenshot using Phantom and NodeJS
Capture dynamic content such as a Google Map or an entire web page. phanshot will turn any url or string of html into a screenshot. Pass an optional selector to capture only a specific portion of the page. Several configuration parameters are available to customize how screenshots are taken, however logical defaults are provided for easy implementation of common use cases.
Install via npm:
npm install phanshot --saveCurrent Development (coming soon)
- Detect when DOM element is loaded within iframe to reduce latency
- Support for offsets passed in as params
Latest Version
1.2.0 is a complete refactor of phanshot. Improved stability, optional iframe loader support, configurable wait time, and more exposed methods for hackers needing additional flexibility.
Getting Started
This is a NEW project; more documentation is coming soon.
Using the phanshot router
If you are using Express for your routes, then simply include the phanshot router in your app start file (usually app.js or index.js)
const app = express();
const { route } = require('phanshot');
app.use( '/screenshot', route );Don't need phanshot router? phanshot direct...
const { phanshot } = require('phanshot');
let base64stream = phanshot.capture({/*config*/});
/* returns a promise... */
base64stream.then( img => {
// do something with img stream; such as pipe to the response
img.pipe( res );
} );config
When calling phanshot, you pass it a JSON config.
Only one of url or html are required, all other fields are optional.
/* Sample config => screenshot of entire google homepage */
{
url: "https://google.com"
}/* Sample config => screenshot from html */
{
"html":"<html><head></head><body style='background-color:#FFF'><div>This is a test</div><div style='width:200px;height:200px;background-color:#0000FF' id='blue'> </div></body></html>"
}In the case where you only want to capture a section of a page, a selector can be added to the config to identify the container element.
For example, to capture only the map contained in the #map div shown on https://hpneo.github.io/gmaps/examples/overlays.html
{
"url": "https://hpneo.github.io/gmaps/examples/overlays.html",
"selector": "#map"
}Be careful to target the correct element! The map shown in the next example is loaded within an iframe, making the #googft-mapCanvas element unreachable. Correctly passing the iframe id #preview will capture the map.
{
"url": "http://harrywood.co.uk/maps/examples/google-maps/add-osm-credits.view.html",
"selector": "#preview"
}The complete list of config options and their defaults:
{
"url": false,
"html": false,
"selector": false,
"rect": false, /* entire viewport */
"viewport": { "width": 1366, "height": 768 },
"useFrame": false,
"wait": 9000,
"phantom": [ "--ignore-ssl-errors=yes", "--web-security=no" ]
}- url - web address to capture as a screenshot
- html - string of html to render as an image; css is supported
- selector - valid querySelector (css selector) of an element to capture
- rect - object with dimensions to create a bounding box for the screenshot
- viewport - size of the phantom viewport (browser)
- useFrame - render the target page in an iframe before rendering to image
- wait - milliseconds to let target page load before rendering to image
- phantom - phantom specific options
Example JSON body (config) sent in a request to phanshot
Screenshot from URL of just the Google logo
{
"url":"https://google.com",
"selector":"#hplogo"
}Screenshot from HTML: just the blue box
{
"html":"<html><head></head><body style='background-color:#FFF'><div>This is a test</div><div style='width:200px;height:200px;background-color:#0000FF' id='blue'> </div></body></html>",
"selector":"#blue"
}