def fetch(self, startTime, endTime):
if not self.__isLeaf:
return []
query_params = [
('target', self.metric_path),
('format', 'pickle'),
('from', str( int(startTime) )),
('until', str( int(endTime) ))
]
query_string = urlencode(query_params)
connection = HTTPConnectionWithTimeout(self.store.host)
connection.timeout = settings.REMOTE_STORE_FETCH_TIMEOUT
connection.request('GET', '/graphite/render/?' + query_string)
response = connection.getresponse()
assert response.status == 200, "Failed to retrieve remote data: %d %s" % (response.status, response.reason)
rawData = response.read()
seriesList = unpickle.loads(rawData)
assert len(seriesList) == 1, "Invalid result: seriesList=%s" % str(seriesList)
series = seriesList[0]
timeInfo = (series['start'], series['end'], series['step'])
return (timeInfo, series['values'])
def renderLocalView(request):
try:
start = time()
reqParams = StringIO(request.raw_post_data)
graphType = reqParams.readline().strip()
optionsPickle = reqParams.read()
reqParams.close()
graphClass = GraphTypes[graphType]
options = unpickle.loads(optionsPickle)
image = doImageRender(graphClass, options)
log.rendering("Delegated rendering request took %.6f seconds" % (time() - start))
return buildResponse(image)
except:
log.exception("Exception in graphite.render.views.rawrender")
return HttpResponseServerError()
def get_results(self):
if self.cachedResults:
return self.cachedResults
if not self.connection:
self.send()
try:
response = self.connection.getresponse()
assert response.status == 200, "received error response %s - %s" % (response.status, response.reason)
result_data = response.read()
results = unpickle.loads(result_data)
except:
self.store.fail()
if not self.suppressErrors:
raise
else:
results = []
resultNodes = [ RemoteNode(self.store, node['metric_path'], node['isLeaf']) for node in results ]
cache.set(self.cacheKey, resultNodes, settings.REMOTE_FIND_CACHE_DURATION)
self.cachedResults = resultNodes
return resultNodes
def recv_response(self, conn):
len_prefix = recv_exactly(conn, 4)
body_size = struct.unpack("!L", len_prefix)[0]
body = recv_exactly(conn, body_size)
return unpickle.loads(body)
