node.js实现快速截图

var webshot = require('webshot'); 
 
webshot('google.com', 'google.png', function(err) { 
 // screenshot now saved to google.png 
}); 
phantomjs生成谷歌首页的示例代码： 
 
var page = require('webpage').create(); 
page.open('http://github.com/', function() { 
 page.render('github.png'); 
 phantom.exit(); 
}); 

var webshot = require('webshot'); 
var fs   = require('fs'); 
 
var renderStream = webshot('google.com'); 
var file = fs.createWriteStream('google.png', {encoding: 'binary'}); 
 
renderStream.on('data', function(data) { 
 file.write(data.toString('binary'), 'binary'); 
}); 

var webshot = require('webshot'); 
 
var options = { 
 screenSize: { 
  width: 320 
 , height: 480 
 } 
, shotSize: { 
  width: 320 
 , height: 'all' 
 } 
, userAgent: 'Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_2 like Mac OS X; en-us)' 
  + ' AppleWebKit/531.21.20 (KHTML, like Gecko) Mobile/7B298g' 
}; 
 
webshot('flickr.com', 'flickr.jpeg', options, function(err) { 
 // screenshot now saved to flickr.jpeg 
}); 

npm isntall -g webshot-cli 

var screenshot = require('desktop-screenshot'); 
 
screenshot("screenshot.png", function(error, complete) { 
  if(error) 
    console.log("Screenshot failed", error); 
  else 
    console.log("Screenshot succeeded"); 
});