function isString(val){
	return (typeof val) === 'string';
}

export function checkStringParam(param, min, max){
	return isString(param) && (param.length >= min) && (param.length <= max);
}

export function errorOut(reply, msg, code){
	reply.code(code || 400);
	reply.send(msg || 'Bad request.');
}

export function ipAddress(request){
	return request.ip;
}

export function localeFromHeader(input){
	//not sure what to do with this yet.
	//https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Language
	return checkStringParam(input, 1, 64) ? input : 'en';
}