def ping_site(site):
"""
Utility function which, when passed a site object, sends
an HTTP GET request and logs the response
"""
try:
# first off make a request
response = fetch(url=site.url, allow_truncated=True)
# log everything to the debug log
logging.debug("Made request for %s and got %s" % (site.url, response.status_code))
# record the event
ping = Ping(
site = site,
code = response.status_code,
)
# then do special things based on the request response
if response.status_code == '404':
logging.error("Page not found at %s" % site.url)
ping.up = False
elif response.status_code == '500':
logging.error("Error on %s" % site.url)
ping.up = False
# save the event
ping.put()
except DownloadError, e:
# we also want to watch out for if the site doesn't
# respond at all
ping = Ping(
site = site,
code = 408, # 408 is request timeout
up = False,
)
ping.put()
logging.error("Error accessing %s: %s" % (site.url, e))
def get(self):
user = User.get_by_id(users.get_current_user().user_id())
urlsafe_key = self.request.get('page')
tqx = self.request.get('tqx')
try:
logging.info('Get page by urlsafe %s' % urlsafe_key)
key = ndb.Key(urlsafe=urlsafe_key)
page = key.get()
except:
logging.error('Error generating Page object from key.id().')
page = None
if page:
if page.user == user.key:
description = {
'date': ('datetime', 'Fecha'),
'resp_time': ('number', 'Tiempo de respuesta'),
}
data = []
# Query the data
query = Ping.query(Ping.page == page.key)
query = query.order(-Ping.date)
# fetch 288 pings representing the last 24 hrs
pings = query.fetch(288)
for ping in pings:
entry = {
'date': ping.date,
'resp_time': ping.resp_time,
}
data.append(entry)
data_table = gviz_api.DataTable(description)
data_table.LoadData(data)
self.response.headers['Content-Type'] = 'text/plain'
self.response.out.write(data_table.ToJSonResponse(
columns_order=('date', 'resp_time'),
order_by="date",
req_id=tqx[6:] if tqx else 0))
else:
# Return 401 Unauthorized
logging.error('Unauthorized')
self.response.set_status(401)
self.response.out.write('Unauthorized')
else:
# Return 404 Not Found
logging.error('Not Found')
self.response.set_status(404)
self.response.out.write('Not Found')
def save_ping():
ping = Ping()
ping.page = page.key
ping.resp_time = resp_time
ping.resp_code = result.status_code
ping.put()
# Update Last Ping data
page.last_ping = datetime.now()
page.put()
def get(self):
current_user = users.get_current_user()
template_args = {}
# Make sure a User entity gets created.
if current_user:
user = User.get_by_id(current_user.user_id())
if not user:
self.redirect('/register')
else:
q = Page.query(ancestor=user.key)
q = q.order(Page.name)
pages = q.fetch(10)
# Issue asynchronous fetch operations per page
for page in pages:
query = Ping.query(Ping.page == page.key)
query = query.order(-Ping.date)
# fetch 288 pings representing the last 24 hrs
page.pings_future = query.fetch_async(288)
# Reading fetch results and calculate avg latency
for page in pages:
pings = page.pings_future.get_result()
total_resp_time = 0
if pings:
for p in pings:
total_resp_time += p.resp_time
page.avg_resp_time = total_resp_time/len(pings)
template_args.update({
'pages': pages,
})
self.render_template('index.html', **template_args)
def write():
new_timestamp = Ping(timestamp=str(time.time()))
db.session.add(new_timestamp)
db.session.commit()
return
