308 lines
11 KiB
Python
308 lines
11 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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from __future__ import absolute_import, division, unicode_literals
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from logging import getLogger
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import requests
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import requests.exceptions as exceptions
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from . import utils, clientinfo, app
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###############################################################################
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# Disable annoying requests warnings
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import requests.packages.urllib3
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requests.packages.urllib3.disable_warnings()
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LOG = getLogger('PLEX.download')
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###############################################################################
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class DownloadUtils():
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"""
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Manages any up/downloads with PKC. Careful to initiate correctly
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Use startSession() to initiate.
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If not initiated, e.g. SSL check will fallback to False
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"""
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# Borg - multiple instances, shared state
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_shared_state = {}
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# How many failed attempts before declaring PMS dead?
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connection_attempts = 1
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count_error = 0
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# How many 401 returns before declaring unauthorized?
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unauthorized_attempts = 2
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count_unauthorized = 0
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# How long should we wait for an answer from the
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timeout = 30.0
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def __init__(self):
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self.__dict__ = self._shared_state
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def setSSL(self):
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"""
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certificate must be path to certificate or 'None'
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"""
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verifySSL = app.CONN.verify_ssl_cert
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certificate = app.CONN.ssl_cert_path
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# Set the session's parameters
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self.s.verify = verifySSL
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if certificate:
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self.s.cert = certificate
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LOG.debug("Verify SSL certificates set to: %s", verifySSL)
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LOG.debug("SSL client side certificate set to: %s", certificate)
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def startSession(self, reset=False):
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"""
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User should be authenticated when this method is called
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"""
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# Start session
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self.s = requests.Session()
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self.deviceId = clientinfo.getDeviceId()
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# Attach authenticated header to the session
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self.s.headers = clientinfo.getXArgsDeviceInfo()
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self.s.encoding = 'utf-8'
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# Set SSL settings
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self.setSSL()
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# Counters to declare PMS dead or unauthorized
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if reset is True:
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self.count_error = 0
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self.count_unauthorized = 0
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# Retry connections to the server
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self.s.mount("http://", requests.adapters.HTTPAdapter(max_retries=1))
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self.s.mount("https://", requests.adapters.HTTPAdapter(max_retries=1))
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LOG.debug("Requests session started on: %s", app.CONN.server)
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def stopSession(self):
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try:
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self.s.close()
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except Exception:
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LOG.info("Requests session already closed")
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try:
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del self.s
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except AttributeError:
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pass
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LOG.info('Request session stopped')
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@staticmethod
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def getHeader(options=None):
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header = clientinfo.getXArgsDeviceInfo()
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if options is not None:
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header.update(options)
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return header
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@staticmethod
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def _doDownload(s, action_type, **kwargs):
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if action_type == "GET":
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r = s.get(**kwargs)
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elif action_type == "POST":
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r = s.post(**kwargs)
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elif action_type == "DELETE":
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r = s.delete(**kwargs)
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elif action_type == "OPTIONS":
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r = s.options(**kwargs)
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elif action_type == "PUT":
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r = s.put(**kwargs)
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return r
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def downloadUrl(self, url, action_type="GET", postBody=None,
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parameters=None, authenticate=True, headerOptions=None,
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verifySSL=True, timeout=None, return_response=False,
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headerOverride=None, reraise=False):
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"""
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Override SSL check with verifySSL=False
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If authenticate=True, existing request session will be used/started
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Otherwise, 'empty' request will be made
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Returns:
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None If an error occured
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True If connection worked but no body was received
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401, ... integer if PMS answered with HTTP error 401
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(unauthorized) or other http error codes
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xml xml etree root object, if applicable
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json json() object, if applicable
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<response-object> if return_response=True is set (200, 201 only)
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"""
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kwargs = {'timeout': self.timeout}
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if authenticate is True:
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# Get requests session
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try:
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s = self.s
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except AttributeError:
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LOG.info("Request session does not exist: start one")
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self.startSession()
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s = self.s
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# Replace for the real values
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url = url.replace("{server}", app.CONN.server)
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else:
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# User is not (yet) authenticated. Used to communicate with
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# plex.tv and to check for PMS servers
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s = requests
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if not headerOverride:
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headerOptions = self.getHeader(options=headerOptions)
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else:
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headerOptions = headerOverride
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kwargs['verify'] = app.CONN.verify_ssl_cert
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if app.CONN.ssl_cert_path:
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kwargs['cert'] = app.CONN.ssl_cert_path
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# Set the variables we were passed (fallback to request session
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# otherwise - faster)
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kwargs['url'] = url
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if verifySSL is False:
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kwargs['verify'] = False
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if headerOptions is not None:
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kwargs['headers'] = headerOptions
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if postBody is not None:
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kwargs['data'] = postBody
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if parameters is not None:
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kwargs['params'] = parameters
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if timeout is not None:
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kwargs['timeout'] = timeout
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# ACTUAL DOWNLOAD HAPPENING HERE
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success = False
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try:
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r = self._doDownload(s, action_type, **kwargs)
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# THE EXCEPTIONS
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except exceptions.SSLError as e:
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LOG.warn("Invalid SSL certificate for: %s", url)
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LOG.warn(e)
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if reraise:
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raise
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except exceptions.ConnectionError as e:
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# Connection error
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LOG.warn("Server unreachable at: %s", url)
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LOG.warn(e)
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if reraise:
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raise
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except exceptions.Timeout as e:
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LOG.warn("Server timeout at: %s", url)
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LOG.warn(e)
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if reraise:
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raise
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except exceptions.HTTPError as e:
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LOG.warn('HTTP Error at %s', url)
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LOG.warn(e)
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if reraise:
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raise
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except exceptions.TooManyRedirects as e:
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LOG.warn("Too many redirects connecting to: %s", url)
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LOG.warn(e)
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if reraise:
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raise
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except exceptions.RequestException as e:
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LOG.warn("Unknown error connecting to: %s", url)
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LOG.warn(e)
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if reraise:
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raise
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except SystemExit:
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LOG.info('SystemExit detected, aborting download')
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self.stopSession()
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if reraise:
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raise
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except Exception:
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LOG.warn('Unknown error while downloading. Traceback:')
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import traceback
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LOG.warn(traceback.format_exc())
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if reraise:
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raise
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# THE RESPONSE #####
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else:
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success = True
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# We COULD contact the PMS, hence it ain't dead
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if authenticate is True:
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self.count_error = 0
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if r.status_code != 401:
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self.count_unauthorized = 0
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if return_response is True:
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# return the entire response object
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return r
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elif r.status_code == 204:
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# No body in the response
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# But read (empty) content to release connection back to pool
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# (see requests: keep-alive documentation)
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r.content
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return True
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elif r.status_code == 401:
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if authenticate is False:
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# Called when checking a connect - no need for rash action
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return 401
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r.encoding = 'utf-8'
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LOG.warn('HTTP error 401 from PMS %s', url)
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LOG.info(r.text)
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if '401 Unauthorized' in r.text:
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# Truly unauthorized
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self.count_unauthorized += 1
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if self.count_unauthorized >= self.unauthorized_attempts:
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LOG.warn('We seem to be truly unauthorized for PMS'
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' %s ', url)
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# Unauthorized access, user no longer has access
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app.ACCOUNT.log_out()
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utils.dialog('notification',
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utils.lang(29999),
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utils.lang(30017),
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icon='{error}')
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else:
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# there might be other 401 where e.g. PMS under strain
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LOG.info('PMS might only be under strain')
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return 401
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elif r.status_code in (200, 201):
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# 200: OK
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# 201: Created
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try:
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# xml response
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r = utils.defused_etree.fromstring(r.content)
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return r
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except Exception:
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r.encoding = 'utf-8'
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if r.text == '':
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# Answer does not contain a body
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return True
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try:
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# UNICODE - JSON object
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r = r.json()
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return r
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except Exception:
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if '200 OK' in r.text:
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# Received fucked up OK from PMS on playstate
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# update
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pass
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else:
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LOG.warn("Unable to convert the response for: "
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"%s", url)
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LOG.warn("Received headers were: %s", r.headers)
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LOG.warn('Received text: %s', r.text)
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return True
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elif r.status_code == 403:
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# E.g. deleting a PMS item
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LOG.warn('PMS sent 403: Forbidden error for url %s', url)
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return
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else:
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r.encoding = 'utf-8'
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LOG.warn('Unknown answer from PMS %s with status code %s: %s',
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url, r.status_code, r.text)
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return True
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finally:
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if not success and authenticate:
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# Deal with the consequences of the exceptions
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# Make the addon aware of status
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self.count_error += 1
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if self.count_error >= self.connection_attempts:
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LOG.warn('Failed to connect to %s too many times. '
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'Declare PMS dead', url)
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app.CONN.online = False
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