/usr/lib/python2.7/dist-packages/graphite/render/views.py is in graphite-web 0.9.12+debian-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 | """Copyright 2008 Orbitz WorldWide
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License."""
import csv
from datetime import datetime
from time import time
from random import shuffle
from httplib import CannotSendRequest
from urllib import urlencode
from urlparse import urlsplit, urlunsplit
from cgi import parse_qs
from cStringIO import StringIO
try:
import cPickle as pickle
except ImportError:
import pickle
try: # See if there is a system installation of pytz first
import pytz
except ImportError: # Otherwise we fall back to Graphite's bundled version
from graphite.thirdparty import pytz
from graphite.util import getProfileByUsername, json, unpickle
from graphite.remote_storage import HTTPConnectionWithTimeout
from graphite.logger import log
from graphite.render.evaluator import evaluateTarget
from graphite.render.attime import parseATTime
from graphite.render.functions import PieFunctions
from graphite.render.hashing import hashRequest, hashData
from graphite.render.glyph import GraphTypes
from django.http import HttpResponse, HttpResponseServerError, HttpResponseRedirect
from django.template import Context, loader
from django.core.cache import cache
from django.core.exceptions import ObjectDoesNotExist
from django.conf import settings
def renderView(request):
start = time()
(graphOptions, requestOptions) = parseOptions(request)
useCache = 'noCache' not in requestOptions
cacheTimeout = requestOptions['cacheTimeout']
requestContext = {
'startTime' : requestOptions['startTime'],
'endTime' : requestOptions['endTime'],
'localOnly' : requestOptions['localOnly'],
'data' : []
}
data = requestContext['data']
# First we check the request cache
if useCache:
requestKey = hashRequest(request)
cachedResponse = cache.get(requestKey)
if cachedResponse:
log.cache('Request-Cache hit [%s]' % requestKey)
log.rendering('Returned cached response in %.6f' % (time() - start))
return cachedResponse
else:
log.cache('Request-Cache miss [%s]' % requestKey)
# Now we prepare the requested data
if requestOptions['graphType'] == 'pie':
for target in requestOptions['targets']:
if target.find(':') >= 0:
try:
name,value = target.split(':',1)
value = float(value)
except:
raise ValueError, "Invalid target '%s'" % target
data.append( (name,value) )
else:
seriesList = evaluateTarget(requestContext, target)
for series in seriesList:
func = PieFunctions[requestOptions['pieMode']]
data.append( (series.name, func(requestContext, series) or 0 ))
elif requestOptions['graphType'] == 'line':
# Let's see if at least our data is cached
if useCache:
targets = requestOptions['targets']
startTime = requestOptions['startTime']
endTime = requestOptions['endTime']
dataKey = hashData(targets, startTime, endTime)
cachedData = cache.get(dataKey)
if cachedData:
log.cache("Data-Cache hit [%s]" % dataKey)
else:
log.cache("Data-Cache miss [%s]" % dataKey)
else:
cachedData = None
if cachedData is not None:
requestContext['data'] = data = cachedData
else: # Have to actually retrieve the data now
for target in requestOptions['targets']:
t = time()
seriesList = evaluateTarget(requestContext, target)
log.rendering("Retrieval of %s took %.6f" % (target, time() - t))
data.extend(seriesList)
if useCache:
cache.set(dataKey, data, cacheTimeout)
format = requestOptions.get('format')
if format == 'csv':
response = HttpResponse(content_type='text/csv')
writer = csv.writer(response, dialect='excel')
for series in data:
for i, value in enumerate(series):
timestamp = datetime.fromtimestamp(series.start + (i * series.step), requestOptions['tzinfo'])
writer.writerow((series.name, timestamp.strftime("%Y-%m-%d %H:%M:%S"), value))
return response
if format == 'json':
series_data = []
for series in data:
timestamps = range(series.start, series.end, series.step)
datapoints = zip(series, timestamps)
series_data.append( dict(target=series.name, datapoints=datapoints) )
if 'jsonp' in requestOptions:
response = HttpResponse(
content="%s(%s)" % (requestOptions['jsonp'], json.dumps(series_data)),
content_type='text/javascript')
else:
response = HttpResponse(content=json.dumps(series_data), content_type='application/json')
response['Pragma'] = 'no-cache'
response['Cache-Control'] = 'no-cache'
return response
if format == 'raw':
response = HttpResponse(content_type='text/plain')
for series in data:
response.write( "%s,%d,%d,%d|" % (series.name, series.start, series.end, series.step) )
response.write( ','.join(map(str,series)) )
response.write('\n')
log.rendering('Total rawData rendering time %.6f' % (time() - start))
return response
if format == 'svg':
graphOptions['outputFormat'] = 'svg'
if format == 'pickle':
response = HttpResponse(content_type='application/pickle')
seriesInfo = [series.getInfo() for series in data]
pickle.dump(seriesInfo, response, protocol=-1)
log.rendering('Total pickle rendering time %.6f' % (time() - start))
return response
# We've got the data, now to render it
graphOptions['data'] = data
if settings.REMOTE_RENDERING: # Rendering on other machines is faster in some situations
image = delegateRendering(requestOptions['graphType'], graphOptions)
else:
image = doImageRender(requestOptions['graphClass'], graphOptions)
useSVG = graphOptions.get('outputFormat') == 'svg'
if useSVG and 'jsonp' in requestOptions:
response = HttpResponse(
content="%s(%s)" % (requestOptions['jsonp'], json.dumps(image)),
content_type='text/javascript')
else:
response = buildResponse(image, useSVG and 'image/svg+xml' or 'image/png')
if useCache:
cache.set(requestKey, response, cacheTimeout)
log.rendering('Total rendering time %.6f seconds' % (time() - start))
return response
def parseOptions(request):
queryParams = request.REQUEST
# Start with some defaults
graphOptions = {'width' : 330, 'height' : 250}
requestOptions = {}
graphType = queryParams.get('graphType','line')
assert graphType in GraphTypes, "Invalid graphType '%s', must be one of %s" % (graphType,GraphTypes.keys())
graphClass = GraphTypes[graphType]
# Fill in the requestOptions
requestOptions['graphType'] = graphType
requestOptions['graphClass'] = graphClass
requestOptions['pieMode'] = queryParams.get('pieMode', 'average')
requestOptions['cacheTimeout'] = int( queryParams.get('cacheTimeout', settings.DEFAULT_CACHE_DURATION) )
requestOptions['targets'] = []
# Extract the targets out of the queryParams
mytargets = []
# Normal format: ?target=path.1&target=path.2
if len(queryParams.getlist('target')) > 0:
mytargets = queryParams.getlist('target')
# Rails/PHP/jQuery common practice format: ?target[]=path.1&target[]=path.2
elif len(queryParams.getlist('target[]')) > 0:
mytargets = queryParams.getlist('target[]')
# Collect the targets
for target in mytargets:
requestOptions['targets'].append(target)
if 'pickle' in queryParams:
requestOptions['format'] = 'pickle'
if 'rawData' in queryParams:
requestOptions['format'] = 'raw'
if 'format' in queryParams:
requestOptions['format'] = queryParams['format']
if 'jsonp' in queryParams:
requestOptions['jsonp'] = queryParams['jsonp']
if 'noCache' in queryParams:
requestOptions['noCache'] = True
requestOptions['localOnly'] = queryParams.get('local') == '1'
# Fill in the graphOptions
for opt in graphClass.customizable:
if opt in queryParams:
val = queryParams[opt]
if (val.isdigit() or (val.startswith('-') and val[1:].isdigit())) and opt not in ('fgcolor','bgcolor','fontColor'):
val = int(val)
elif '.' in val and (val.replace('.','',1).isdigit() or (val.startswith('-') and val[1:].replace('.','',1).isdigit())):
val = float(val)
elif val.lower() in ('true','false'):
val = val.lower() == 'true'
elif val.lower() == 'default' or val == '':
continue
graphOptions[opt] = val
tzinfo = pytz.timezone(settings.TIME_ZONE)
if 'tz' in queryParams:
try:
tzinfo = pytz.timezone(queryParams['tz'])
except pytz.UnknownTimeZoneError:
pass
requestOptions['tzinfo'] = tzinfo
# Get the time interval for time-oriented graph types
if graphType == 'line' or graphType == 'pie':
if 'until' in queryParams:
untilTime = parseATTime(queryParams['until'], tzinfo)
else:
untilTime = parseATTime('now', tzinfo)
if 'from' in queryParams:
fromTime = parseATTime(queryParams['from'], tzinfo)
else:
fromTime = parseATTime('-1d', tzinfo)
startTime = min(fromTime, untilTime)
endTime = max(fromTime, untilTime)
assert startTime != endTime, "Invalid empty time range"
requestOptions['startTime'] = startTime
requestOptions['endTime'] = endTime
return (graphOptions, requestOptions)
connectionPools = {}
def delegateRendering(graphType, graphOptions):
start = time()
postData = graphType + '\n' + pickle.dumps(graphOptions)
servers = settings.RENDERING_HOSTS[:] #make a copy so we can shuffle it safely
shuffle(servers)
for server in servers:
start2 = time()
try:
# Get a connection
try:
pool = connectionPools[server]
except KeyError: #happens the first time
pool = connectionPools[server] = set()
try:
connection = pool.pop()
except KeyError: #No available connections, have to make a new one
connection = HTTPConnectionWithTimeout(server)
connection.timeout = settings.REMOTE_RENDER_CONNECT_TIMEOUT
# Send the request
try:
connection.request('POST','/render/local/', postData)
except CannotSendRequest:
connection = HTTPConnectionWithTimeout(server) #retry once
connection.timeout = settings.REMOTE_RENDER_CONNECT_TIMEOUT
connection.request('POST', '/render/local/', postData)
# Read the response
response = connection.getresponse()
assert response.status == 200, "Bad response code %d from %s" % (response.status,server)
contentType = response.getheader('Content-Type')
imageData = response.read()
assert contentType == 'image/png', "Bad content type: \"%s\" from %s" % (contentType,server)
assert imageData, "Received empty response from %s" % server
# Wrap things up
log.rendering('Remotely rendered image on %s in %.6f seconds' % (server,time() - start2))
log.rendering('Spent a total of %.6f seconds doing remote rendering work' % (time() - start))
pool.add(connection)
return imageData
except:
log.exception("Exception while attempting remote rendering request on %s" % server)
log.rendering('Exception while remotely rendering on %s wasted %.6f' % (server,time() - start2))
continue
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 renderMyGraphView(request,username,graphName):
profile = getProfileByUsername(username)
if not profile:
return errorPage("No such user '%s'" % username)
try:
graph = profile.mygraph_set.get(name=graphName)
except ObjectDoesNotExist:
return errorPage("User %s doesn't have a MyGraph named '%s'" % (username,graphName))
request_params = dict(request.REQUEST.items())
if request_params:
url_parts = urlsplit(graph.url)
query_string = url_parts[3]
if query_string:
url_params = parse_qs(query_string)
# Remove lists so that we can do an update() on the dict
for param, value in url_params.items():
if isinstance(value, list) and param != 'target':
url_params[param] = value[-1]
url_params.update(request_params)
# Handle 'target' being a list - we want duplicate &target params out of it
url_param_pairs = []
for key,val in url_params.items():
if isinstance(val, list):
for v in val:
url_param_pairs.append( (key,v) )
else:
url_param_pairs.append( (key,val) )
query_string = urlencode(url_param_pairs)
url = urlunsplit(url_parts[:3] + (query_string,) + url_parts[4:])
else:
url = graph.url
return HttpResponseRedirect(url)
def doImageRender(graphClass, graphOptions):
pngData = StringIO()
t = time()
img = graphClass(**graphOptions)
img.output(pngData)
log.rendering('Rendered PNG in %.6f seconds' % (time() - t))
imageData = pngData.getvalue()
pngData.close()
return imageData
def buildResponse(imageData, mimetype="image/png"):
response = HttpResponse(imageData, content_type=mimetype)
response['Cache-Control'] = 'no-cache'
response['Pragma'] = 'no-cache'
return response
def errorPage(message):
template = loader.get_template('500.html')
context = Context(dict(message=message))
return HttpResponseServerError( template.render(context) )
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