www/webapp/handlers_iuse.py

   1 #!/usr/bin/python
   2
   3 import logging
   4 import tornado.web
   5
   6 from handlers_base import *
   7 import backend
   8
   9 class IUseImage(BaseHandler):
  10         @property
  11         def iuse(self):
  12                 return backend.IUse()
  13
  14         @property
  15         def stasy(self):
  16                 return backend.Stasy()
  17
  18         def get(self, profile_id, image_id):
  19                 image = None
  20                 # Try to get the image from memcache. If we have a cache miss we
  21                 # build a new one.
  22                 mem_id = "iuse-%s-%s-%s" % (profile_id, image_id, self.locale.code)
  23
  24                 cache = self.get_argument("cache", "true")
  25                 if cache == "true":
  26                         image = self.memcached.get(mem_id)
  27
  28                 if image:
  29                         logging.debug("Got image from cache for profile: %s" % profile_id)
  30                 else:
  31                         logging.info("Rendering new image for profile: %s" % profile_id)
  32
  33                         image_cls = self.iuse.get_imagetype(image_id)
  34                         if not image_cls:
  35                                 raise tornado.web.HTTPError(404, "Image class is unknown: %s" % image_id)
  36
  37                         profile = self.stasy.get_profile(profile_id)
  38                         if not profile:
  39                                 raise tornado.web.HTTPError(404, "Profile '%s' was not found." % profile_id)
  40
  41                         # Render the image
  42                         image = image_cls(self, profile).to_string()
  43
  44                         # Save the image to the memcache for 15 minutes
  45                         self.memcached.set(mem_id, image, 15*60)
  46
  47                 self.set_header("Content-Type", "image/png")
  48                 self.write(image)
  49