def callDeferredMethod(method, *args):
try:
conn = yield client.connect(reactor, busAddress="system")
robj = yield conn.getRemoteObject(service_name, service_path)
result = yield robj.callRemote(method, *args)
defer.returnValue(result)
except error.DBusException as e:
out.err("D-Bus error: {}".format(e))
pass
def write(filename, data, mode="w"):
""" Writes out a config file to the specified location.
"""
try:
fd = open(filename, mode)
fd.write(data)
fd.flush()
fd.close()
except Exception as e:
out.err('Unable to write to file: %s\n' % str(e))
def printFailure(r):
# Autobahn cast exceptions
if isinstance(r.value, exception.Error):
print r.value.args[0]
return None
else:
out.err('Unknown exception: ' + str(r))
return r
def reloadAll(update):
# Note: reloading all config files at once seems safer than individual
# files because of cross-dependencies.
statusString = client.reloadAll()
# Check the status to make sure all configuration sections
# related to this chute were successfully loaded.
status = json.loads(statusString)
for section in status:
if section['comment'] == update.name:
if not section['success']:
out.err("Error installing configuration section {} {}".format(
section['type'], section['name']))
raise Exception("Error preparing host environment for chute")
def execute(self):
"""
The function that actually walks through the main process required to create the chute.
It follows the executeplan module through the paces of:
1) Generate the plans for each exc module
2) Prioritize the plans
3) Execute the plans
If at any point we fail then this function will directly take care of completing
the update process with an error state and will close the API connection.
"""
# Save a timestamp from when we started execution.
self.startTime = time.time()
# Generate the plans we need to setup the chute
if(exc.executionplan.generatePlans(self)):
out.warn('Failed to generate plans\n')
self.complete(success=False, message=self.failure)
return
# Aggregate those plans
exc.executionplan.aggregatePlans(self)
# Execute on those plans
if(exc.executionplan.executePlans(self)):
# Getting here means we need to abort what we did
res = exc.executionplan.abortPlans(self)
# Did aborting also fail? This is bad!
if(res):
###################################################################################
# Getting here means the abort system thinks it wasn't able to get the system
# back into the state it was in prior to this update.
###################################################################################
out.err('TODO: What do we do when we fail during abort?\n')
pass
# Report the failure back to the user
self.complete(success=False, message=self.failure)
return
# Now save the new state if we are all ok
self.saveState()
# Respond to the API server to let them know the result
self.complete(success=True, message='Chute {} {} success'.format(
self.name, self.updateType))
def saveToDisk(self):
"""Saves the data to disk."""
out.info("Saving to disk (%s)\n" % (self.filename))
# Make sure they want to save
if not self.attrSaveable():
return
# Get whatever the data is
pyld = self.exportAttr(self.getAttr())
# Write the file to disk, truncate if it exists
try:
pickle.dump(pyld, pdos.open(self.filename, "wb"))
pdos.syncFS()
except Exception as e:
out.err("Error writing to disk %s\n" % (str(e)))
def writeFile(filename, line, mode="a"):
"""Adds the following cfg (either str or list(str)) to this Chute's current
config file (just stored locally, not written to file."""
try:
if(type(line) is list):
data = "\n".join(line) + "\n"
elif(type(line) is str):
data = "%s\n" % line
else:
out.err("Bad line provided for %s\n" % filename)
return
fd = open(filename, mode)
fd.write(data)
fd.flush()
fd.close()
except Exception as e:
out.err('Unable to write file: %s\n' % (str(e)))
def preprocess(self, request, checkThresh, tictoc):
"""
Check if failure attempts for the user name has met the threshold.
Arguments:
request :
checkThresh : If None, no checking. Tuple of arguments for checking thresholds
ip: IP of client in string format
token: sessionToken if found, or None
username: username if signin, or None
failureDict: the dict for failure history
ticktoc: If none, do not track the usage. The start time of the API call
Return:
str: if threshold is met
None: if ok
"""
if(checkThresh):
ip, token, key, failureDict = checkThresh
# Check if IP is in whitelist
ipaddr = apiutils.unpackIPAddr(ip)
for ipnet in self.WHITELIST_IP:
net = apiutils.unpackIPAddrWithSlash(ipnet)
if(apiutils.addressInNetwork(ipaddr, net)):
out.verbose('Request from white list: %s\n' % (ip))
return None
if(key in failureDict):
if(failureDict[key].attempts >= settings.DBAPI_FAILURE_THRESH):
out.err('Threshold met: %s %s!\n' % (ip, key))
if(tictoc is None):
usage = None
else:
usage = (tictoc, None)
self.failprocess(ip, request, (ip, failureDict), None, usage, pdapi.getResponse(pdapi.ERR_THRESHOLD))
duration = 0 # self.perf.toc(tictoc)
# Log the info of this call
# TODO self.usageTracker.addTrackInfo(ip, 'Null', request.path, self.usageTracker.FAIL_THRESH, duration, request.content.getvalue())
return "Threshold Met!"
# Otherwise everything is ok
return None
def default(self, request):
"""
A dummy catch for all API calls that are not caught by any other module.
"""
ip = apiutils.getIP(request)
uri = request.uri
method = request.method
# Get data about who done it
out.err("Default caught API call (%s => %s:%s)\n" % (ip, method, uri))
# TODO: What is this?
tictoc = None
# Someone might be trying something bad, track their IP
res = self.preprocess(request, (ip, None, ip, self.defaultFailures), tictoc)
if(res):
return res
self.failprocess(ip, request, (ip, self.defaultFailures), None, (tictoc, None), pdapi.ERR_BADMETHOD)
return ""
def loadFromDisk(self):
"""Attempts to load the data from disk.
Returns True if success, False otherwise."""
if pdos.exists(self.filename):
deleteFile = False
out.info("Loading from disk\n")
data = ""
try:
pyld = pickle.load(pdos.open(self.filename, "rb"))
self.setAttr(self.importAttr(pyld))
return True
except Exception as e:
out.err("Error loading from disk: %s\n" % (str(e)))
deleteFile = True
# Delete the file
if deleteFile:
try:
pdos.unlink(self.filename)
except Exception as e:
out.err("Error unlinking %s\n" % (self.filename))
return False
def readConfig(self):
"""Reads in the config file."""
def correctStr(line):
return " ".join(line.split())
lines = []
try:
fd = pdos.open(self.filepath, 'r')
while(True):
line = fd.readline()
if(not line):
break
lines.append(line)
fd.close()
except Exception as e:
out.err('Error reading file %s: %s\n' % (self.filepath, str(e)))
raise e
cfg = None
opt = None
data = []
# Now we have the data, deal with it
for line in lines:
line = line.rstrip()
# If comment ignore
if(line.startswith('#')):
continue
# First make all lines have correct whitespace
# FIXME: if there is a space WITHIN quotes this kills it!
# this could come up as a key in an encryption key
line = correctStr(line)
l = getLineParts(line)
#
# Config
#
#print("l: %s" % l)
if(l[0] == 'config'):
# Save last config we had
if(cfg and opt):
data.append((cfg, opt))
# start a new config
cfg = {'type': l[1]}
# Third element can be comment or name
if(len(l) == 3):
if (l[2].startswith('#')):
cfg['comment'] = l[2][1:]
else:
cfg['name'] = l[2]
elif (len(l) == 4):
# Four elements, so third is name and 4th is comment
cfg['name'] = l[2]
cfg['comment'] = l[3][1:]
opt = {}
#
# Options
#
elif(l[0] == 'option'):
opt[l[1]] = l[2]
#
# List
#
elif(l[0] == 'list'):
# Make sure there is a list key
if('list' not in opt.keys()):
opt['list'] = {}
if(l[1] in opt['list'].keys()):
opt['list'][l[1]].append(l[2])
else:
opt['list'][l[1]] = [l[2]]
else:
# Also at the end of the loop, save the final config we were making
# Make sure cfg,opt aren't None
if(None not in (cfg, opt)):
data.append((cfg, opt))
return data
def save(self, backupToken=None, internalid=None):
"""
Saves out the file in the proper format.
Arguments:
[backupPath] : Save a backup copy of the UCI file to the path provided.
Should be a token name like 'backup', it gets appended with a hyphen.
"""
# Save original copy
if(backupToken):
self.backup(backupToken)
output = ""
# Now generate what the file would look like
for c, o in self.config:
#print("c: %s\n" % c.keys())
line = "config %s" % c['type']
# Check for optional name
if('name' in c.keys()):
line += " %s" % c['name']
if('comment' in c.keys()):
line += " #%s" % c['comment']
output += "%s\n" % line
# Get options
# check for lists first, if they exist remove them first
if('list' in o.keys()):
theLists = o['list']
else:
theLists = None
# Now process everything else quick
for k,v in o.iteritems():
# Make sure we skip the lists key
if(k != 'list'):
line = "\toption %s '%s'\n" % (k,v)
output += line
# Now process the list
if(theLists):
# theLists is a dict where the key is each list name
# and the value is a list of the options we need to include
for k,v in theLists.iteritems():
# so @v here is a list
for vals in v:
# Now append a list set to the config
line = "\tlist %s '%s'\n" % (k, vals)
output += line
# Now add one extra newline before the next set
output += "\n"
# Now write to disk
try:
out.info('Saving %s to disk\n' % (self.filepath))
fd = pdos.open(self.filepath, 'w')
fd.write(output)
# Guarantee that its written to disk before we close
fd.flush()
os.fsync(fd.fileno())
fd.close()
except Exception as e:
out.err('Unable to save new config %s, %s\n' % (self.filepath, str(e)))
out.err('Config may be corrupted, backup exists at /tmp/%s\n' % (self.myname))
