screenurl

#!/usr/local/bin/phantomjs --ssl-protocol=tlsv1

// Script to screenshot the given URL.  It renders when it receives
// a callPhantom invocation with {renderNow: true}. The viewport
// defaults to the URL's body size.

var system = require('system');


// --------------------- Set Timeout ---------------------

function timeoutAndExit() {
  console.info("Screenshot timeout, exiting")
  phantom.exit();
}

var timeout = system.args[1]

setTimeout(timeoutAndExit, timeout)

// --------------------- Init Args ---------------------

var urlToRender = system.args[2]
var outputFile = system.args[3]

// --------------------- Load and Screenshot Page ---------------------

var page = require('webpage').create();

if (system.args[4] === 'pdf') {
  page.paperSize = { width: 1003, height: 800, margin: 16 };
}

page.onError = function (msg, trace) {
  console.log(urlToRender + ' - An error occurred: ' + msg);
  trace.forEach(function(item) {
      console.log('  ', item.file, ':', item.line);
  });
};

page.onConsoleMessage = function(msg, lineNum, sourceId) {
  console.log('CONSOLE: ' + msg + ' (from line #' + lineNum + ' in "' + sourceId + '")');
};

page.onCallback = function(data) {
  console.log(urlToRender + ' - Received phantom callback: ' + JSON.stringify(data));
  if (!data.renderNow) {
    return
  }
  if (system.args[4] === 'pdf') {
    console.log('Rendering PDF to: ' + outputFile)
    page.render(outputFile, {format: 'pdf', quality: 30})
  } else {
    console.log('Rendering PNG to: ' + outputFile)
    page.render(outputFile, {format: 'png', quality: 30})
  }
  phantom.exit();
};

console.info("Requesting url: " + urlToRender)

page.open(urlToRender, function() {
  console.info('Opened page, waiting for signal')
});

to run:

rm ./imgs/share_test.png || true  && ./aj/share_test.js 12000 "http://localhost:3000/shared/85784dbf-bf8b-4f33-a19e-e5892c7c6677?screenshot=true" ./imgs/share_test.png && open ./imgs/share_test.png

share_test.js is name of script in this case

install phantom from here http://phantomjs.org/download.html