def get(self, path):
s = time.time()
try:
cached = self.CACHE.get(path)
self.deliver(cached)
self.flush()
return
except KeyError:
pass
url = self.get_worker_url(path)
client = thc.AsyncHTTPClient()
response = yield gen.Task(client.fetch, url)
if response.error:
self.set_status(response.code)
self.write(str(response.error))
self.finish()
return
else:
# cache the response
image = cached_image(body=response.body,
content_type=response.headers.get('Content-Type'),
size=len(response.body))
self.CACHE.put(path, image)
self.deliver(image)
self.finish()
return
def on_fetch(self, response):
im = None
if response.error:
logging.error('%s got a %s %s',
response.request.url,
response.code,
response.error)
else:
ctype = response.headers.get('Content-Type')
cimg = cached_image(body=response.body,
content_type=ctype,
size=len(response.body))
if self._cache:
self._cache.put(path, cimg)
im = Image.open(StringIO(cimg.body))
waiters = self._inflight.pop(response.request.url)
logging.debug('popping %s waiters for %s', len(waiters),
response.request.url)
for c in waiters:
c(im)