Hi,
I have an app which has enabled billing. Totally I'm far from
exceeding my qouta but in the logs I see on many requests the
following: "this resource used a high amount of CPU and may soon
exceed it's qouta". It seems like these requests use about 1000cpu_ms.
How much is allowed for one requests? I read something about per-
minute qouta...
The handler of this type of requests just acts like a proxy server to
a rest api:
--------------------------------------------------------------------------------------------------------------------------
import cgi
import urllib
import wsgiref.handlers
import datetime
from google.appengine.ext import webapp
from google.appengine.api import urlfetch
from google.appengine.api import memcache
class YrController(webapp.RequestHandler):
def get(self):
self.response.headers['Content-Type'] = "text/xml"
self.response.headers['Cache-Control'] = "public, max-age=3600"
endpoint = 'http://api.yr.no/weatherapi/locationforecast/1.6/'
params = self.request.GET
apiquery = urllib.urlencode(params)
weather = memcache.get(apiquery)
lastmod = memcache.get(apiquery + "Last-Modified")
expires = memcache.get(apiquery + "Expires")
if lastmod is None:
lastmod =
datetime.datetime.today().replace(microsecond=0)
if expires is None:
expires = lastmod + datetime.timedelta(hours=1)
if self.request.headers.has_key("If-Modified-Since"):
dt = self.request.headers.get("If-Modified-Since")
modsince = datetime.datetime.strptime(dt, "%a, %d %b %Y
%H:%M:%S
GMT")
if modsince >= lastmod:
self.error(304)
return
if weather is None:
result = urlfetch.fetch(url=endpoint + '?' + apiquery,
method=urlfetch.GET)
weather = result.content
memcache.set(key=apiquery, value=result.content,
time=3600)
memcache.set(key=apiquery + "Last-Modified",
value=lastmod,
time=3600)
memcache.set(key=apiquery + "Expires", value=expires,
time=3600)
self.response.headers['Last-Modified'] = lastmod.strftime("%a,
%d %b
%Y %H:%M:%S GMT")
self.response.headers['Expires'] = expires.strftime("%a, %d %b
%Y %H:
%M:%S GMT")
self.response.out.write(weather)
def main():
application = webapp.WSGIApplication([('/api/', YrController)],
debug=True)
wsgiref.handlers.CGIHandler().run(application)
if __name__ == "__main__":
main()
--------------------------------------------------------------------------------------------------------------------------
Is it because the requests can take some time to excecute (waiting for
the the urlfetch request) it takes alot of cpu_ms? How can I improve
the performance of this?
Magnus
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