In the following example, we'll query google for two terms consecutively,
"capserjs" and "phantomjs", aggregate the result links in a standard Array
and output the result to the console.
Fire up your favorite editor and save the javascript code below in a
googlelinks.js
file:
var links = [];
var casper = require('casper').create();
function getLinks() {
var links = document.querySelectorAll('h3.r a');
return Array.prototype.map.call(links, function(e) {
return e.getAttribute('href')
});
}
casper.start('http://google.fr/', function() {
// search for 'casperjs' from google form
this.fill('form[action="/search"]', { q: 'casperjs' }, true);
});
casper.then(function() {
// aggregate results for the 'casperjs' search
links = this.evaluate(getLinks);
// now search for 'phantomjs' by filling the form again
this.fill('form[action="/search"]', { q: 'phantomjs' }, true);
});
casper.then(function() {
// aggregate results for the 'phantomjs' search
links = links.concat(this.evaluate(getLinks));
});
casper.run(function() {
// echo results in some pretty fashion
this.echo(links.length + ' links found:');
this.echo(' - ' + links.join('\n - ')).exit();
});
Run it:
$ casperjs googlelinks.js
20 links found:
- https://github.com/n1k0/casperjs
- https://github.com/n1k0/casperjs/issues/2
- https://github.com/n1k0/casperjs/tree/master/samples
- https://github.com/n1k0/casperjs/commits/master/
- http://www.facebook.com/people/Casper-Js/100000337260665
- http://www.facebook.com/public/Casper-Js
- http://hashtags.org/tag/CasperJS/
- http://www.zerotohundred.com/newforums/members/casper-js.html
- http://www.yellowpages.com/casper-wy/j-s-enterprises
- http://local.trib.com/casper+wy/j+s+chinese+restaurant.zq.html
- http://www.phantomjs.org/
- http://code.google.com/p/phantomjs/
- http://code.google.com/p/phantomjs/wiki/QuickStart
- http://svay.com/blog/index/post/2011/08/31/Paris-JS-10-%3A-Introduction-%C3%A0-PhantomJS
- https://github.com/ariya/phantomjs
- http://dailyjs.com/2011/01/28/phantoms/
- http://css.dzone.com/articles/phantom-js-alternative
- http://pilvee.com/blog/tag/phantom-js/
- http://ariya.blogspot.com/2011/01/phantomjs-minimalistic-headless-webkit.html
- http://www.readwriteweb.com/hack/2011/03/phantomjs-the-power-of-webkit.php
CoffeeScript
You can also write Casper scripts using the CoffeeScript syntax:
getLinks = ->
links = document.querySelectorAll "h3.r a"
Array::map.call links, (e) -> e.getAttribute "href"
links = []
casper = require('casper').create()
casper.start "http://google.fr/", ->
# search for 'casperjs' from google form
@fill "form[action='/search']", q: "casperjs", true
casper.then ->
# aggregate results for the 'casperjs' search
links = @evaluate getLinks
# search for 'phantomjs' from google form
@fill "form[action='/search']", q: "phantomjs", true
casper.then ->
# concat results for the 'phantomjs' search
links = links.concat @evaluate(getLinks)
casper.run ->
# display results
@echo links.length + " links found:"
@echo(" - " + links.join("\n - ")).exit()
Just remember to suffix your script with the .coffee
extension.