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Super dumbed-down ad server - serving a random image every-time.
using Manos;
using System;
using System.IO;
public class RandomAd : ManosApp {
public RandomAd () {
var ads = Directory.GetFiles(".", "*.gif");
var random = new Random();
Route ("/", ctx=> {
var idx = random.Next(ads.Length);
ctx.Response.Headers.SetNormalizedHeader ("Content-Type", "image/gif");
import tornado.ioloop
import tornado.web
import glob
import random
class AdsHandler(tornado.web.RequestHandler):
# future: a proper storage instead of local folder
# future: set cache policy
# we actually do not want to cache that as we want to keep it random
# but the images themselves should be cached.
# perhaps replace it with a redirect (with no-cache) to a url of the image (on CDN with far-away cache)
ads = glob.glob("./*.gif")
def get(self):
self.set_header("Content-Type", "image/gif")
ad = random.choice(
# future: add location aware/user aware logic
def write_binary(self, filename):
# there probably is a better way of doing that with async io
with open(filename, "rb") as f:
while True:
# and there probably is a better way to chunk the reads.
# half a kb feels right, however for real-scenario I'd be
# reasearching + trial/err to optimise *if needed*
bytes =
print len(bytes)
if not bytes: break
application = tornado.web.Application([
(r"/", AdsHandler),
if __name__ == "__main__":
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