Script para consultar el diccionario de la RAE en linea usando phantomjs

rae.js

function waitFor(testFx, onReady, timeOutMillis) {
    var maxtimeOutMillis = timeOutMillis ? timeOutMillis : 9000, //< Default Max Timout 
        start = new Date().getTime(),
        condition = false,
        interval = setInterval(function() {
            if ( (new Date().getTime() - start < maxtimeOutMillis) && !condition ) {
                // If not time-out yet and condition not yet fulfilled
                condition = (typeof(testFx) === "string" ? eval(testFx) : testFx()); //< defensive code
            } else {
                if(!condition) {
                    // If condition still not fulfilled (timeout but condition is 'false')
                    console.log("'waitFor()' timeout");
                    phantom.exit(1);
                } else {
                    // Condition fulfilled (timeout and/or condition is 'true')
                    // console.log("'waitFor()' finished in " + (new Date().getTime() - start) + "ms.");
                    typeof(onReady) === "string" ? eval(onReady) : onReady(); //< Do what it's supposed to do once the condition is fulfilled
                    clearInterval(interval); //< Stop this interval
                }
            }
        }, 500); //< repeat check every 250ms
};

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

page.onConsoleMessage = function(msg) {
	system.stderr.writeLine( 'console: ' + msg );
};

if (system.args.length < 2) {
    console.log("Uso: rae.js PALABRA_BUSCAR");
    phantom.exit(1);
} else {
	console.log('Cargando la pagina web');
	var url = 'http://buscon.rae.es/drae/srv/search?val=' + system.args[1];
	// console.log(url);
	page.open(url, function (status) {
		if (status !== 'success') {
			console.log('No se puede acceder a la red');
			phantom.exit();
		} else {
			console.log('La pagina cargo');
			waitFor(function() {
				// Check in the page if a specific element is now visible
				return page.evaluate(function() {
					var resp = false;
					var myList = document.getElementsByTagName("div");
					var myErr = document.getElementsByTagName("p");
					if (myList.length > 0 || myErr.length > 0) {
						resp = true;
					} 
					return resp;
				});
			}, function() {
				var ua = page.evaluate(function() {
					var msg = "";
					var myList = document.getElementsByTagName("div");
					var myErr = document.getElementsByTagName("p");
					var myUl = document.getElementsByTagName("ul");
					if (myList.length > 0 ) {
						msg = myList[0].textContent;
					} else if (myErr.length > 0) {
						msg = myErr[0].textContent + "\n";
						if (myUl.length > 0) {
							var elem = myUl.item(0);
							msg += elem.textContent.replace(/ *\([^)]*\) */g, "");
						}
					} else {
						msg = "Falla app";
					}
					return msg;
				});
				console.log(ua);
				phantom.exit();
			}); 
		}
	});

}

      

Ahora se logean mejor los errores 😄 Lastima que ahora aparece código de google analytics al azar