utils.js
function gravatarUrl(email, size) {
    var url = 'http://www.gravatar.com/avatar/';
    if (email) {
        url += crypto.createHash('md5').update(email.toLowerCase()).digest('hex');
    }
    if (size) {
        url += '?s=' + size;
    }
    return url;
}
function gravatarUrl(email, size) {
    var url = 'http://www.gravatar.com/avatar/';
    if (email) {
        url += crypto.createHash('md5').update(email.toLowerCase()).digest('hex');
    }
    if (size) {
        url += '?s=' + size;
    }
    return url;
}
function gravatarUrl ( email , size ) { var url = 'http://www.gravatar.com/avatar/' ; if ( email ) { url += crypto . createHash ( 'md5' ) . update ( email . toLowerCase ( ) ) . digest ( 'hex' ) ; } if ( size ) { url += '?s=' + size ; } return url ; }
get gravatar url.

@param {String} email
@param {Number} [size]
@return {String} gravatar url
get gravatar url .