/usr/share/pyshared/weboob/tools/browser/browser.py is in python-weboob-core 0.g-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright(C) 2010-2011 Romain Bignon
#
# This file is part of weboob.
#
# weboob is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# weboob is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with weboob. If not, see <http://www.gnu.org/licenses/>.
from copy import copy
from httplib import BadStatusLine
from logging import warning
try:
import mechanize
except ImportError:
raise ImportError('Please install python-mechanize')
import os
import sys
import re
import tempfile
from threading import RLock
import ssl
import httplib
import socket
import hashlib
import time
import urllib
import urllib2
from urlparse import urlsplit
import mimetypes
from contextlib import closing
from gzip import GzipFile
import warnings
from weboob.tools.decorators import retry
from weboob.tools.log import getLogger
from weboob.tools.mech import ClientForm
ControlNotFoundError = ClientForm.ControlNotFoundError
from weboob.tools.parsers import get_parser
# Try to load cookies
try:
from .firefox_cookies import FirefoxCookieJar
except ImportError as e:
warning("Unable to store cookies: %s" % e)
HAVE_COOKIES = False
else:
HAVE_COOKIES = True
__all__ = ['BrowserIncorrectPassword', 'BrowserForbidden', 'BrowserBanned', 'BrowserUnavailable', 'BrowserRetry',
'BrowserHTTPNotFound', 'BrowserHTTPError', 'BrokenPageError', 'BasePage',
'StandardBrowser', 'BaseBrowser']
# Exceptions
class BrowserIncorrectPassword(Exception):
pass
class BrowserForbidden(Exception):
pass
class BrowserBanned(BrowserIncorrectPassword):
pass
class BrowserPasswordExpired(BrowserIncorrectPassword):
pass
class BrowserUnavailable(Exception):
pass
class BrowserHTTPNotFound(BrowserUnavailable):
pass
class BrowserHTTPError(BrowserUnavailable):
pass
class BrowserRetry(Exception):
pass
class NoHistory(object):
"""
We don't want to fill memory with history
"""
def __init__(self):
pass
def add(self, request, response):
pass
def back(self, n, _response):
pass
def clear(self):
pass
def close(self):
pass
class BrokenPageError(Exception):
pass
class FormFieldConversionWarning(UserWarning):
"""
A value has been set to a form's field and has been implicitly converted.
"""
class BasePage(object):
"""
Base page
"""
ENCODING = None
def __init__(self, browser, document, url='', groups=None, group_dict=None, logger=None):
self.browser = browser
self.parser = browser.parser
self.document = document
self.url = url
self.groups = groups
self.group_dict = group_dict
self.logger = getLogger('page', logger)
def on_loaded(self):
"""
Called when the page is loaded.
"""
pass
def check_location(func):
def inner(self, *args, **kwargs):
if args and isinstance(args[0], basestring):
url = args[0]
if url.startswith('/') and hasattr(self, 'DOMAIN') and (not self.request or self.request.host != self.DOMAIN):
url = '%s://%s%s' % (self.PROTOCOL, self.DOMAIN, url)
url = re.sub('(.*)#.*', r'\1', url)
if isinstance(url, unicode):
url = url.encode('utf-8')
args = (url,) + args[1:]
return func(self, *args, **kwargs)
return inner
class StandardBrowser(mechanize.Browser):
"""
Standard Browser.
:param firefox_cookies: path to cookies sqlite file
:type firefox_cookies: str
:param parser: parser to use on HTML files
:type parser: :class:`weboob.tools.parsers.iparser.IParser`
:param history: history manager; default value is an object which
does not keep history
:type history: object
:param proxy: proxy URL to use
:type proxy: str
:param factory: mechanize factory. None to use Mechanize's default
:type factory: object
"""
# ------ Class attributes --------------------------------------
ENCODING = 'utf-8'
USER_AGENTS = {
'desktop_firefox': 'Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20100101 Firefox/17.0',
'android': 'Mozilla/5.0 (Linux; U; Android 2.1; en-us; Nexus One Build/ERD62) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17',
'microb': 'Mozilla/5.0 (X11; U; Linux armv7l; fr-FR; rv:1.9.2.3pre) Gecko/20100723 Firefox/3.5 Maemo Browser 1.7.4.8 RX-51 N900',
'wget': 'Wget/1.11.4',
}
USER_AGENT = USER_AGENTS['desktop_firefox']
SAVE_RESPONSES = False
DEBUG_HTTP = False
DEBUG_MECHANIZE = False
DEFAULT_TIMEOUT = 15
INSECURE = False # if True, do not validate SSL
responses_dirname = None
responses_count = 0
logger = None
# ------ Browser methods ---------------------------------------
# I'm not a robot, so disable the check of permissions in robots.txt.
default_features = copy(mechanize.Browser.default_features)
default_features.remove('_robots')
default_features.remove('_refresh')
def __init__(self, firefox_cookies=None, parser=None, history=NoHistory(), proxy=None, logger=None, factory=None, responses_dirname=None):
mechanize.Browser.__init__(self, history=history, factory=factory)
self.logger = getLogger('browser', logger)
self.addheaders = [
['User-agent', self.USER_AGENT]
]
# Use a proxy
self.proxy = proxy
if proxy:
proto = 'http'
if '://' in proxy:
v = urlsplit(proxy)
proto = v.scheme
domain = v.netloc
else:
domain = proxy
self.set_proxies({proto: domain})
# Share cookies with firefox
if firefox_cookies and HAVE_COOKIES:
self._cookie = FirefoxCookieJar(self.DOMAIN, firefox_cookies)
self._cookie.load()
self.set_cookiejar(self._cookie)
else:
self._cookie = None
if parser is None:
parser = get_parser()()
elif isinstance(parser, (tuple,list,basestring)):
parser = get_parser(parser)()
self.parser = parser
self.lock = RLock()
if self.DEBUG_HTTP:
# display messages from httplib
self.set_debug_http(True)
if self.DEBUG_MECHANIZE:
# Enable log messages from mechanize.Browser
self.set_debug_redirects(True)
self.responses_dirname = responses_dirname
def __enter__(self):
self.lock.acquire()
def __exit__(self, t, v, tb):
self.lock.release()
def _openurl(self, *args, **kwargs):
return mechanize.Browser.open(self, *args, **kwargs)
@check_location
@retry(BrowserHTTPError, tries=3)
def openurl(self, *args, **kwargs):
"""
Open an URL but do not create a Page object.
"""
if_fail = kwargs.pop('if_fail', 'raise')
self.logger.debug('Opening URL "%s", %s' % (args, kwargs))
kwargs['timeout'] = kwargs.get('timeout', self.DEFAULT_TIMEOUT)
try:
return self._openurl(*args, **kwargs)
except (mechanize.BrowserStateError, mechanize.response_seek_wrapper,
urllib2.HTTPError, urllib2.URLError, BadStatusLine, ssl.SSLError) as e:
if isinstance(e, mechanize.BrowserStateError) and hasattr(self, 'home'):
self.home()
return self._openurl(*args, **kwargs)
elif if_fail == 'raise':
raise self.get_exception(e)('%s (url="%s")' % (e, args and args[0] or 'None'))
else:
return None
except BrowserRetry as e:
return self._openurl(*args, **kwargs)
def get_exception(self, e):
if isinstance(e, urllib2.HTTPError) and hasattr(e, 'getcode'):
if e.getcode() in (404, 403):
return BrowserHTTPNotFound
if e.getcode() == 401:
return BrowserIncorrectPassword
elif isinstance(e, mechanize.BrowserStateError):
return BrowserHTTPNotFound
return BrowserHTTPError
def readurl(self, url, *args, **kwargs):
"""
Download URL data specifying what to do on failure (nothing by default).
"""
if not 'if_fail' in kwargs:
kwargs['if_fail'] = None
result = self.openurl(url, *args, **kwargs)
if result:
if self.SAVE_RESPONSES:
self.save_response(result)
return result.read()
else:
return None
def save_response(self, result, warning=False):
"""
Save a stream to a temporary file, and log its name.
The stream is rewinded after saving.
"""
if self.responses_dirname is None:
self.responses_dirname = tempfile.mkdtemp(prefix='weboob_session_')
print >>sys.stderr, 'Debug data will be saved in this directory: %s' % self.responses_dirname
elif not os.path.isdir(self.responses_dirname):
os.makedirs(self.responses_dirname)
# get the content-type, remove optionnal charset part
mimetype = result.info().get('Content-Type', '').split(';')[0]
# due to http://bugs.python.org/issue1043134
if mimetype == 'text/plain':
ext = '.txt'
else:
# try to get an extension (and avoid adding 'None')
ext = mimetypes.guess_extension(mimetype, False) or ''
response_filepath = os.path.join(self.responses_dirname, unicode(self.responses_count)+ext)
with open(response_filepath, 'w') as f:
f.write(result.read())
result.seek(0)
match_filepath = os.path.join(self.responses_dirname, 'url_response_match.txt')
with open(match_filepath, 'a') as f:
f.write('%s\t%s\n' % (result.geturl(), os.path.basename(response_filepath)))
self.responses_count += 1
msg = u'Response saved to %s' % response_filepath
if warning:
self.logger.warning(msg)
else:
self.logger.info(msg)
def get_document(self, result, parser=None, encoding=None):
"""
Get a parsed document from a stream.
:param result: HTML page stream
:type result: stream
"""
if parser is None:
parser = self.parser
elif isinstance(parser, (basestring, list, tuple)):
parser = get_parser(parser)()
if encoding is None:
encoding = self.ENCODING
return parser.parse(result, encoding)
def location(self, *args, **kwargs):
"""
Go on an URL and get the related document.
"""
return self.get_document(self.openurl(*args, **kwargs))
@staticmethod
def buildurl(base, *args, **kwargs):
"""
Build an URL and escape arguments.
You can give a serie of tuples in args (and the order is keept), or
a dict in kwargs (but the order is lost).
Example:
>>> StandardBrowser.buildurl('/blah.php', ('a', '&'), ('b', '='))
'/blah.php?a=%26&b=%3D'
>>> StandardBrowser.buildurl('/blah.php', a='&', b='=')
'/blah.php?b=%3D&a=%26'
"""
if not args:
args = kwargs
if not args:
return base
else:
return '%s?%s' % (base, urllib.urlencode(args))
def str(self, s):
if isinstance(s, unicode):
s = s.encode('iso-8859-15', 'replace')
return s
def set_field(self, args, label, field=None, value=None, is_list=False):
"""
Set a value to a form field.
:param args: arguments where to look for value
:type args: dict
:param label: label in args
:type label: str
:param field: field name. If None, use label instead
:type field: str
:param value: value to give on field
:type value: str
:param is_list: the field is a list
:type is_list: bool
"""
try:
if not field:
field = label
if args.get(label, None) is not None:
if not value:
if is_list:
if isinstance(is_list, (list, tuple)):
try:
value = [self.str(is_list.index(args[label]))]
except ValueError as e:
if args[label]:
print >>sys.stderr, '[%s] %s: %s' % (label, args[label], e)
return
else:
value = [self.str(args[label])]
else:
value = self.str(args[label])
self[field] = value
except ControlNotFoundError:
return
def lowsslcheck(self, domain, hsh):
certhash = self._certhash(domain)
if self.logger:
self.logger.debug('Found %s as certificate hash' % certhash)
if isinstance(hsh, basestring):
hsh = [hsh]
if certhash not in hsh:
raise ssl.SSLError()
def _certhash(self, domain, port=443):
certs = ssl.get_server_certificate((domain, port))
return hashlib.sha256(certs).hexdigest()
def __setitem__(self, key, value):
if isinstance(value, unicode):
value = value.encode(self.ENCODING or 'utf-8')
warnings.warn('Implicit conversion of form field %r from unicode to str' % key,
FormFieldConversionWarning, stacklevel=2)
if self.form is None:
raise AttributeError('Please select a form before setting values to fields')
return self.form.__setitem__(key, value)
class BaseBrowser(StandardBrowser):
"""
Base browser class to navigate on a website.
:param username: username on website
:type username: str
:param password: password on website. If it is None, Browser will
not try to login
:type password: str
:param firefox_cookies: path to cookies sqlite file
:type firefox_cookies: str
:param parser: parser to use on HTML files
:type parser: :class:`weboob.tools.parsers.iparser.IParser`
:param history: history manager; default value is an object which
does not keep history
:type history: object
:param proxy: proxy URL to use
:type proxy: str
:param logger: logger to use for logging
:type logger: :class:`logging.Logger`
:param factory: mechanize factory. None to use Mechanize's default
:type factory: object
:param get_home: try to get the homepage.
:type get_homme: bool
:param responses_dirname: directory to store responses
:type responses_dirname: str
"""
# ------ Class attributes --------------------------------------
DOMAIN = None
PROTOCOL = 'http'
PAGES = {}
# SHA-256 hash of server certificate. If set, it will automatically check it,
# and raise a SSLError exception if it doesn't match.
CERTHASH = None
# ------ Abstract methods --------------------------------------
def home(self):
"""
Go to the home page.
"""
if self.DOMAIN is not None:
self.location('%s://%s/' % (self.PROTOCOL, self.DOMAIN))
def login(self):
"""
Login to the website.
This function is called when is_logged() returns False and the password
attribute is not None.
"""
raise NotImplementedError()
def is_logged(self):
"""
Return True if we are logged on website. When Browser tries to access
to a page, if this method returns False, it calls login().
It is never called if the password attribute is None.
"""
raise NotImplementedError()
# ------ Browser methods ---------------------------------------
def __init__(self, username=None, password=None, firefox_cookies=None,
parser=None, history=NoHistory(), proxy=None, logger=None,
factory=None, get_home=True, responses_dirname=None):
StandardBrowser.__init__(self, firefox_cookies, parser, history, proxy, logger, factory, responses_dirname)
self.page = None
self.last_update = 0.0
self.username = username
self.password = password
if not self.INSECURE and self.CERTHASH is not None and self.DOMAIN is not None:
self.lowsslcheck(self.DOMAIN, self.CERTHASH)
if self.password and get_home:
try:
self.home()
# Do not abort the build of browser when the website is down.
except BrowserUnavailable:
pass
def submit(self, *args, **kwargs):
"""
Submit the selected form.
"""
nologin = kwargs.pop('nologin', False)
try:
self._change_location(mechanize.Browser.submit(self, *args, **kwargs), no_login=nologin)
except (mechanize.response_seek_wrapper, urllib2.HTTPError, urllib2.URLError, BadStatusLine, ssl.SSLError) as e:
self.page = None
raise self.get_exception(e)(e)
except (mechanize.BrowserStateError, BrowserRetry) as e:
raise BrowserUnavailable(e)
def is_on_page(self, pageCls):
"""
Check the current page.
:param pageCls: class of the page to check
:type pageCls: :class:`BasePage`
:rtype: bool
"""
return isinstance(self.page, pageCls)
def absurl(self, rel):
"""
Get an absolute URL from a relative one.
"""
if rel is None:
return None
if not rel.startswith('/'):
rel = '/' + rel
return '%s://%s%s' % (self.PROTOCOL, self.DOMAIN, rel)
def follow_link(self, *args, **kwargs):
"""
Follow a link on the page.
"""
try:
self._change_location(mechanize.Browser.follow_link(self, *args, **kwargs))
except (mechanize.response_seek_wrapper, urllib2.HTTPError, urllib2.URLError, BadStatusLine, ssl.SSLError) as e:
self.page = None
raise self.get_exception(e)('%s (url="%s")' % (e, args and args[0] or 'None'))
except (mechanize.BrowserStateError, BrowserRetry) as e:
self.home()
raise BrowserUnavailable(e)
def _openurl(self, *args, **kwargs):
return mechanize.Browser.open_novisit(self, *args, **kwargs)
@check_location
@retry(BrowserHTTPError, tries=3)
def location(self, *args, **kwargs):
"""
Change location of browser on an URL.
When the page is loaded, it looks up PAGES to find a regexp which
matches, and create the object. Then, the 'on_loaded' method of
this object is called.
If a password is set, and is_logged() returns False, it tries to login
with login() and reload the page.
"""
keep_args = copy(args)
keep_kwargs = kwargs.copy()
no_login = kwargs.pop('no_login', False)
kwargs['timeout'] = kwargs.get('timeout', self.DEFAULT_TIMEOUT)
try:
self._change_location(mechanize.Browser.open(self, *args, **kwargs), no_login=no_login)
except BrowserRetry:
if not self.page or not args or self.page.url != args[0]:
keep_kwargs['no_login'] = True
self.location(*keep_args, **keep_kwargs)
except (mechanize.response_seek_wrapper, urllib2.HTTPError, urllib2.URLError, BadStatusLine, ssl.SSLError) as e:
self.page = None
raise self.get_exception(e)('%s (url="%s")' % (e, args and args[0] or 'None'))
except mechanize.BrowserStateError:
self.home()
self.location(*keep_args, **keep_kwargs)
# DO NOT ENABLE THIS FUCKING PEACE OF CODE EVEN IF IT WOULD BE BETTER
# TO SANITARIZE FUCKING HTML.
#def _set_response(self, response, *args, **kwargs):
# import time
# if response and hasattr(response, 'set_data'):
# print time.time()
# r = response.read()
# start = 0
# end = 0
# new = ''
# lowr = r.lower()
# start = lowr[end:].find('<script')
# while start >= end:
# start_stop = start + lowr[start:].find('>') + 1
# new += r[end:start_stop]
# end = start + lowr[start:].find('</script>')
# new += r[start_stop:end].replace('<', '<').replace('>', '>')
# start = end + lowr[end:].find('<script')
# new += r[end:]
# response.set_data(new)
# print time.time()
# mechanize.Browser._set_response(self, response, *args, **kwargs)
def _set_response(self, response, *args, **kwargs):
# Support Gzip, because mechanize does not, and some websites always send gzip
if response and hasattr(response, 'set_data'):
headers = response.info()
if headers.get('Content-Encoding', '') == 'gzip':
with closing(GzipFile(fileobj=response, mode='rb')) as gz:
data = gz.read()
response.set_data(data)
mechanize.Browser._set_response(self, response, *args, **kwargs)
def _change_location(self, result, no_login=False):
"""
This function is called when we have moved to a page, to load a Page
object.
"""
# Find page from url
pageCls = None
parser = None
page_groups = None
page_group_dict = None
for key, value in self.PAGES.items():
if isinstance(key, basestring):
if not key.startswith('^') and not key.endswith('$'):
regexp = re.compile('^%s$' % key)
else:
regexp = re.compile(key)
else:
regexp = key
m = regexp.search(result.geturl())
if m:
if isinstance(value, (list, tuple)):
pageCls = value[0]
parser = value[1]
else:
pageCls = value
parser = self.parser
page_groups = m.groups()
page_group_dict = m.groupdict()
break
# Not found
if not pageCls:
self.page = None
self.logger.warning('There isn\'t any page corresponding to URL %s' % result.geturl())
self.save_response(result, warning=True)
return
self.logger.debug('[user_id=%s] Went on %s' % (self.username, result.geturl()))
self.last_update = time.time()
if self.SAVE_RESPONSES:
self.save_response(result)
document = self.get_document(result, parser, encoding=pageCls.ENCODING)
self.page = pageCls(self, document, result.geturl(), groups=page_groups, group_dict=page_group_dict, logger=self.logger)
if not no_login and self.password is not None and not self.is_logged():
self.logger.debug('!! Relogin !!')
self.login()
raise BrowserRetry()
self.page.on_loaded()
if self._cookie:
self._cookie.save()
def mywrap_socket(sock, *args, **kwargs):
kwargs['do_handshake_on_connect'] = False
sock = ssl.wrap_socketold(sock, *args, **kwargs)
sock.settimeout(StandardBrowser.DEFAULT_TIMEOUT)
try:
sock.getpeername()
except:
sock.do_handshake_on_connect = True
else:
sock.do_handshake()
return sock
ssl.wrap_socketold = ssl.wrap_socket
ssl.wrap_socket = mywrap_socket
class DNSTimeoutException(Exception):
pass
cacheDNS = {}
def my_getaddrinfo(*args):
try:
res, timeout = cacheDNS[args]
# Do not cache result more than one hour
# it prevents to cache results in long time application
# like monboob
if time.time() - timeout > 3600:
raise DNSTimeoutException()
return res
except (KeyError, DNSTimeoutException):
res = socket.getaddrinfoold(*args)
cacheDNS[args] = res, time.time()
return res
socket.getaddrinfoold = socket.getaddrinfo
socket.getaddrinfo = my_getaddrinfo
class HTTPSConnection2(httplib.HTTPSConnection):
_HOSTS = {}
_PROTOCOLS = [ssl.PROTOCOL_TLSv1, ssl.PROTOCOL_SSLv3]
def _create_connection(self):
sock = socket.create_connection((self.host, self.port), self.timeout)
if self._tunnel_host:
self._tunnel()
return sock
def _get_protocols(self):
return self._HOSTS.get('%s:%s' % (self.host, self.port), self._PROTOCOLS)
def connect(self):
for proto in self._get_protocols():
sock = self._create_connection()
try:
self.sock = ssl.wrap_socket(sock, self.key_file, self.cert_file, ssl_version=proto)
self._HOSTS['%s:%s' % (self.host, self.port)] = [proto]
return
except ssl.SSLError as e:
sock.close()
raise e
httplib.HTTPSConnection = HTTPSConnection2
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