Example casperjs script. Run from cli: casperjs --params='{"url":"http://foobar.com/"}}' theprogram.js

package.json

{
  "author": "",
  "name": "",
  "version": "0.0.0",
  "dependencies": {
	  "xtend": "> 0.0.0",
	  "utils": "> 0.0.0"
  },
  "devDependencies": {}
}

theprogram.js

var extend = require("xtend");

function exitWithJsonResponse(response) {
	console.log(JSON.stringify(response));
	casper.exit();
}

var verbose = false;

var casper = require('casper').create({
	verbose: verbose,
	logLevel: verbose ? "debug" : null,
	onAlert: function(_casper, msg) {
		var response = {
			status: "error",
			type: "alert",
			msg: msg,
		};
		jsonResponse(response);
	},
});

if (verbose) {
	var utils = require('utils');
	casper.echo("Casper CLI passed args:");
	require("utils").dump(casper.cli.args);
	casper.echo("Casper CLI passed options:");
	require("utils").dump(casper.cli.options);
}

// Parameters can be sent as JSON in params cli option, or directly as cli options
var options = {};
if (casper.cli.options.params !== undefined) {
	options = extend(options, JSON.parse(casper.cli.options.params));
	casper.cli.options.params = null;
}
options = extend(options, casper.cli.options);

if (verbose) {
	casper.echo("Options:");
	require("utils").dump(options);
}

// If necessary, set an ordinary user agent
casper.userAgent('User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_3) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.65 Safari/537.31');

// Set url from params
if (!params.url) {
		var response = {
			status: "error",
			type: "param-missing",
			msg: "Parameter 'url' needs to be supplied",
		};
		exitWithJsonResponse(response);
}

var url = params.url;

casper.start(url, function() {

	if (verbose) {
		casper.download(url, 'url.html');
		//utils.dump(this);
		casper.capture("screen.png");
	}

});

function fillForm() {

	casper.fill('form[name="username"]', params.username, false);
	casper.fill('form[name="password"]', params.password, false);

	if (verbose) {
		casper.capture("form-filled-screen.png");
	}
}

function submitForm() {

	casper.click('button[type="submit"]');

}

// Non-working example for logging in
casper.then(function() {

	fillForm();
	submitForm();

});

casper.then(function() {

	casper.echo("End of script");
	casper.exit();

});