highcharts-server

Highcharts for node.js is a WebServer module that runs on localhost and renders typical Highcharts graphs into base64 PNG strings.

All contributions are welcome.

Simple API

Class: Highcharts

Highcharts has the following methods.

new Highcharts(port, phantomjsTimeout, sleepTime) {

• port Number. Port to bind webserver to localhost.
• phantomjsTimeout Number of milliseconds to wait for phantomjs to return a rendered chart.
• sleepTime If this number of milliseconds has passed since the last chart was rendered, and there are no charts in the queue and none processing, stop phantomjs (it will automatically restart the nest time a render is requested).

Constructor for creating a Highcharts web server instance.

render(imgOptions, chartOptions, callback)

• imgOptions Object. Rendered image options.
• chartOptions Object. General Highcharts options.
• callback Function. The callback has argument (base64png), a base64 PNG data string.

Example Usage

var Highcharts = require('highcharts-server');
var server = new Highcharts(3003);
 
var chartOptions = {
  title: {
    text: 'Monthly Average Temperature',
    x: -20 //center
  },
  subtitle: {
    text: 'Source: WorldClimate.com',
    x: -20
  },
  xAxis: {
    categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
  },
  yAxis: {
    title: {
      text: 'Temperature (C)'
    },
    plotLines: [{
      value: 0,
      width: 1,
      color: '#808080'
    }]
  },
  tooltip: {
    valueSuffix: 'C'
  },
  legend: {
    layout: 'vertical',
    align: 'right',
    verticalAlign: 'middle',
    borderWidth: 0
  },
  series: [
        {
        name: 'Tokyo',
        data: [7.0, 6.9, 9.5, 14.5, 18.2, 21.5, 25.2, 26.5, 23.3, 18.3, 13.9, 9.6]
      },
        {
      name: 'New York',
      data: [-0.2, 0.8, 5.7, 11.3, 17.0, 22.0, 24.8, 24.1, 20.1, 14.1, 8.6, 2.5]
      },
        {
      name: 'Berlin',
      data: [-0.9, 0.6, 3.5, 8.4, 13.5, 17.0, 18.6, 17.9, 14.3, 9.0, 3.9, 1.0]
      },
        {
      name: 'London',
      data: [3.9, 4.2, 5.7, 8.5, 11.9, 15.2, 17.0, 16.6, 14.2, 10.3, 6.6, 4.8]
      }
    ]
};
 
var imgOptions = {
    width: 640,
    scale: 2
};
 
function generateImgTag(base64png) {
    // returns HTML5 img tag with data uri
    return '<img src="data:image/png;base64,' + base64png + '" alt="Monthly Average Temperature" />';
}
 
server.render(imgOptions, chartOptions, generateImgTag);

Installation

npm install highcharts-server

License

(The MIT License)

Copyright (c) frisB.com <[e-mail]>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.