add HTTP OPTIONS handler in CORS example

[bodokaiser]

Hello,

when using CORS the browser tries to do a OPTIONS request to check cross domain policy. This is not handled from express itself and it would be helpful if you add it to you example.

app.all('*', function(req, res, next) {
    res.header('Access-Control-Allow-Origin', 'http://node.enabre.com:3000');
    res.header('Access-Control-Allow-Methods', 'HEAD, GET, POST, PUT, DELETE, OPTIONS');
    res.header('Access-Control-Allow-Headers', 'Content-Type, X-Requested-With, Origin, Accept');
    res.header('Access-Control-Allow-Credentials', 'true');

    if (req.method.toLowerCase() === 'options') {
        res.send(200);
    } else {
        next();
    }
});

source: http://stackoverflow.com/questions/13218174/cors-put-not-found-with-jquery-ajax

Regards, bodo

[tj]

thanks! oddly it does work fine when 404ing for me in chrome at least but certainly not reason to next() there anyway