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import os
import re
import ssl
import sys
import subprocess
import logging
import requests

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import time
import datetime
from urllib.parse import quote
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.support import expected_conditions

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import dateparser

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from bs4 import BeautifulSoup
from pyvirtualdisplay import Display
from pdfminer.high_level import extract_text
from stem import Signal
from stem.control import Controller

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import hashlib
import email

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from mastodon import Mastodon
logger = logging.getLogger(__name__)
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class RAA:
url = ""
date = datetime.datetime(1970, 1, 1)
date_str = ""
name = ""
filename = ""
sha256 = ""
def __init__(self, url, date, name, filename):
if not url == "":
self.url = url
if not date == "":
self.date = date
self.date_str = date.strftime("%d/%m/%Y")
if not name == "":
self.name = name
if not filename == "":
self.filename = filename
def get_sha256(self):
if (self.sha256 == ""):
self.sha256 = hashlib.sha256(
self.filename.encode('utf-8')
).hexdigest()
return self.sha256
def __init__(self, data_dir, user_agent=''):
logger.debug('Initialisation de RAAspotter')
self.session = requests.Session()
self.data_dir = data_dir
self.found = False
self.output_file_path = os.path.dirname(
os.path.abspath(__file__)
)+f'/output_{self.short_code}.log'
self.sleep_time = 0
self.tor_enabled = False
self.tor_max_requests = 0
self.tor_requests = 0
self.not_before = datetime.datetime(2024, 1, 1)
self.smtp_configured = False
self.mastodon = None
self.mastodon_prefix = ''
self.mastodon_suffix = ''
self.update_user_agent(user_agent)
f = open(self.output_file_path, 'w')
f.write('')
f.close()
def configure_mastodon(self, access_token, instance, mastodon_prefix,
mastodon_suffix):
if access_token and access_token != "" and instance and instance != "":
self.mastodon = Mastodon(
access_token=access_token,
api_base_url=instance
)
self.mastodon_prefix = mastodon_prefix
self.mastodon_suffix = mastodon_suffix
def mastodon_toot(self, content):
if self.mastodon:
toot = content
if not self.mastodon_prefix == '':
toot = f"{self.mastodon_prefix}\n\n{toot}"
if not self.mastodon_suffix == '':
toot = f"{toot}\n\n{self.mastodon_suffix}"
self.mastodon.toot(toot)
def enable_tor(self, max_requests=0):
proxies = {
"http": f"socks5h://127.0.0.1:9050",
"https": f"socks5h://127.0.0.1:9050",
self.tor_enabled = True
self.tor_max_requests = max_requests
self.tor_requests = 0
self.session.proxies.update(proxies)
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def disable_tor(self):
proxies = {}
self.tor_enabled = False
self.tor_max_requests = 0
self.tor_requests = 0
self.session.proxies.update(proxies)
def tor_get_new_id(self):
logger.info('Changement d\'identité Tor')
try:
controller = Controller.from_port(port=9051)
controller.authenticate()
controller.signal(Signal.NEWNYM)
time.sleep(5)
self.tor_requests = 0
except Exception as exc:
logger.debug(f'Impossible de changer d\'identité Tor: {exc}')
def get_sub_pages(self, page_content, element, host, recursive_until_pdf):
soup = BeautifulSoup(page_content, 'html.parser')
sub_pages = []
for a in soup.select(element):
if a.get('href'):
url = f"{host}{a['href']}"
if recursive_until_pdf:
sub_page_content = self.get_page(url, 'get').content
if not self.has_pdf(sub_page_content):
logger.info(
f'{url} ne contient pas de PDF, on '
'récupère ses sous-pages'
)
for sub_sub_page in self.get_sub_pages(
sub_page_content,
element,
host,
recursive_until_pdf
):
sub_pages.append(sub_sub_page)
else:
sub_page = {
'url': url,
'name': a.get_text().strip()
}
sub_pages.append(sub_page)
else:
sub_page = {
'url': url,
'name': a.get_text().strip()
}
sub_pages.append(sub_page)
return sub_pages
def get_sub_pages_with_pager(self, page, sub_page_element, pager_element,
host):
pages = []
page_content = self.get_page(page, 'get').content
# On initialise le parser
soup = BeautifulSoup(page_content, 'html.parser')
# On recherche les sous-pages
sub_pages = soup.select(sub_page_element)
for sub_page in sub_pages:
if sub_page.get('href'):
page = {
'url': f"{host}{sub_page['href']}",
'name': sub_page.get_text().strip()
}
pages.append(page)
# On recherche un pager, et si on le trouve on le suit
pager = soup.select(pager_element)
if pager and pager[0] and pager[0].get('href'):
for sub_page in self.get_sub_pages_with_pager(
f"{host}{pager[0]['href']}",
sub_page_element,
pager_element,
host
):
pages.append(sub_page)
return pages
def get_raa_with_pager(self, pages_list, pager_element, host):
elements = []
# On parse chaque page passée en paramètre
for page in pages_list:
page_content = self.get_page(page, 'get').content
# Pour chaque page, on récupère les PDF
for raa in self.get_raa_elements(page_content):
elements.append(raa)
# On regarde également s'il n'y aurait pas un pager
sub_pages = []
for sub_page in self.get_sub_pages(
page_content,
pager_element,
host,
True
):
sub_pages.append(sub_page['url'])
for sub_raa in self.get_raa_with_pager(
sub_pages,
pager_element,
host
):
elements.append(sub_raa)
return elements
def set_sleep_time(self, sleep_time):
self.sleep_time = sleep_time
def has_pdf(self, page_content):
elements = []
soup = BeautifulSoup(page_content, 'html.parser')
for a in soup.find_all('a', href=True):
if a['href'].endswith('.pdf'):
return True
return False
# On démarre le navigateur
def get_session(self, url, wait_element=""):
webdriver_options = webdriver.ChromeOptions()
webdriver_options.add_argument("--no-sandbox")
webdriver_options.add_argument("--disable-extensions")
webdriver_options.add_argument("--disable-gpu")
webdriver_options.add_argument("--disable-dev-shm-usage")
webdriver_options.add_argument("--use_subprocess")
webdriver_options.add_argument(
"--disable-blink-features=AutomationControlled"
)
if not self.user_agent == "":
webdriver_options.add_argument(f"--user-agent={self.user_agent}")
webdriver_options.add_argument("--headless")
webdriver_options.add_argument("--window-size=1024,768")
display = Display(visible=False, size=(1024, 768))
display.start()
browser = webdriver.Chrome(options=webdriver_options)
# Téléchargement de l'URL
browser.get(url)
if not wait_element == "":
# On attend que le navigateur ait passé les tests anti-robots et
# que le contenu s'affiche
WebDriverWait(browser, 120).until(
expected_conditions.presence_of_element_located(
(
By.ID,
wait_element
)
)
)
page_content = browser.page_source
# On récupère les cookies du navigateur pour les réutiliser plus tard
for cookie in browser.get_cookies():
self.session.cookies.set(cookie['name'], cookie['value'])
# On arrête le navigateur
browser.quit()
display.stop()
return page_content
def print_output(self, data):
print(data)
data = data.replace('\033[92m', '')
data = data.replace('\033[0m', '')
data = data.replace('\033[1m', '')
f = open(self.output_file_path, 'a')
f.write(data+"\n")
f.close()
def get_page(self, url, method, data={}):
try:
logger.debug(f'Chargement de la page {url}')
if self.sleep_time > 0:
time.sleep(self.sleep_time)
page = None
if method == 'get':
page = self.session.get(url)
if method == 'post':
page = self.session.post(url, data=data)
if page.status_code == 429:
logger.info(
'Erreur 429 Too Many Requests reçue, temporisation...'
)
self.tor_get_new_id()
time.sleep(55)
return self.get_page(url, method, data)
if self.tor_enabled:
self.tor_requests += 1
if self.tor_max_requests > 0 and \
self.tor_requests > self.tor_max_requests:
self.tor_get_new_id()
return page
except requests.exceptions.ConnectionError as exc:
logger.info(f'Erreur de connexion, temporisation...')
self.tor_get_new_id()
time.sleep(55)
return self.get_page(url, method, data)
def update_user_agent(self, user_agent):
self.user_agent = user_agent
self.session.headers.update({'User-Agent': self.user_agent})
def download_file(self, raa):
try:
os.makedirs(
os.path.dirname(
f'{self.data_dir}{raa.get_sha256()}.pdf'
),
exist_ok=True
)
file = self.get_page(raa.url, 'get')
f = open(f'{self.data_dir}{raa.get_sha256()}.pdf', 'wb')
f.write(file.content)
f.close()
except (requests.exceptions.ConnectionError,
requests.exceptions.ChunkedEncodingError):
logger.warning(
'ATTENTION: la connexion a été interrompue pendant le '
f'téléchargement de {raa.url}, nouvelle tentative...'
)
self.download_file(raa)
except Exception as exc:
logger.warning(
f'ATTENTION: Impossible de télécharger le fichier {raa.url}: '
f'{exc}'
)
def parse_pdf(self, raa, keywords):
if not os.path.isfile(f'{self.data_dir}{raa.get_sha256()}.pdf'):
logger.warning(
f'ATTENTION: le fichier {raa.get_sha256()}.pdf n\'existe pas'
)
else:
text = ""
try:
text = extract_text(f'{self.data_dir}{raa.get_sha256()}.pdf')
except Exception as exc:
logger.warning(
'ATTENTION: Impossible d\'extraire le texte du fichier '
f'{raa.get_sha256()}.pdf : {exc}'
)
found = False
found_keywords = []
for keyword in keywords:
if re.search(keyword, text, re.IGNORECASE | re.MULTILINE):
if not found:
url = quote(raa.url, safe='/:')
self.print_output(
f'\033[92m{raa.name}\033[0m ({raa.date_str})'
)
self.print_output(f'URL : {url}')
found = True
self.found = True
self.print_output(
f' Le terme \033[1m{keyword}\033[0m a été trouvé.'
)
found_keywords.append(keyword)
# Écrit le texte du PDF dans un fichier texte pour une analyse
# future, puis supprime le PDF
f = open(f'{self.data_dir}{raa.get_sha256()}.txt', 'w')
f.write(text)
f.close()
os.remove(f'{self.data_dir}{raa.get_sha256()}.pdf')
if found:
self.print_output('')
url = quote(raa.url, safe='/:')
found_keywords_str = ', '.join(
[str(x) for x in found_keywords]
)
self.mastodon_toot(
f'{raa.name} ({raa.date_str})\n\nLes termes suivants ont '
f'été trouvés : {found_keywords_str}.\n\nURL : {url}'
)
def ocr(self, raa, retry_on_failure=True):
cmd = [
'ocrmypdf',
'-l', 'eng+fra',
'--output-type', 'pdfa',
'--redo-ocr',
'--skip-big', '500',
'--invalidate-digital-signatures',
f'{self.data_dir}{raa.get_sha256()}.pdf',
f'{self.data_dir}{raa.get_sha256()}.pdf'
]
logger.debug(f'Lancement de ocrmypdf: {cmd}')
try:
output = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
except subprocess.CalledProcessError as exc:
if exc.returncode == 2 and retry_on_failure:
logger.warning(
'ATTENTION : Le fichier n\'est pas un PDF correct, '
'nouvelle tentative de le télécharger'
)
if self.tor_enabled:
self.tor_get_new_id()
self.download_file(raa)
self.ocr(raa, False)
elif (not exc.returncode == 6) and (not exc.returncode == 10):
logger.warning(
'ATTENTION : Impossible d\'OCRiser le document',
exc.returncode,
exc.output
)
def parse_raa(self, elements, keywords):
for raa in elements:
# Si le fichier n'a pas déjà été parsé et qu'il est postérieur à la
# date maximale d'analyse, on le télécharge et on le parse
if raa.date >= self.not_before and \
not os.path.isfile(
f'{self.data_dir}{raa.get_sha256()}.txt'
):
url = quote(raa.url, safe='/:')
logger.info(
f'Nouveau fichier : {raa.name} ({raa.date_str}). URL : '
f'{url}'
)
self.download_file(raa)
self.ocr(raa, True)
self.parse_pdf(raa, keywords)
def get_raa(self, page_content):
logger.error('Cette fonction doit être surchargée')
def configure_mailer(self, smtp_host, smtp_username, smtp_password,
smtp_port, smtp_starttls, smtp_ssl, email_from,
email_to, email_object):
self.smtp_host = smtp_host
self.smtp_username = smtp_username
self.smtp_password = smtp_password
if smtp_port <= 0:
self.smtp_port = 587
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self.smtp_port = int(smtp_port)
self.smtp_starttls = smtp_starttls
self.smtp_ssl = smtp_ssl
self.email_from = email_from
self.email_to = email_to
self.email_object = email_object
if smtp_host and smtp_username and smtp_password and email_from and \
email_to and email_object:
self.smtp_configured = True
def mailer(self):
if self.smtp_configured and self.found:
try:
message = email.message.EmailMessage()
message.set_content(open(self.output_file_path).read())
message['Subject'] = self.email_object
message['From'] = self.email_from
message['Message-ID'] = email.utils.make_msgid(
domain=self.email_from.split('@')[-1]
)
message['Date'] = email.utils.formatdate()
context = ssl.create_default_context()
if self.smtp_ssl is True:
for address in self.email_to.split(','):
del message['To']
message['To'] = address
smtp = smtplib.SMTP_SSL(
self.smtp_host,
port,
context=context
)
if self.smtp_username:
smtp.login(self.smtp_username, self.smtp_password)
smtp.send_message(message)
smtp.quit()
elif self.smtp_starttls is True:
for address in self.email_to.split(','):
del message['To']
message['To'] = address
smtp = smtplib.SMTP(self.smtp_host)
smtp.starttls(context=context)
if self.smtp_username:
smtp.login(self.smtp_username, self.smtp_password)
smtp.send_message(message)
smtp.quit()
else:
for address in self.email_to.split(','):
del message['To']
message['To'] = address
smtp = smtplib.SMTP(self.smtp_host)
if self.smtp_username:
smtp.login(self.smtp_username, self.smtp_password)
smtp.send_message(message)
smtp.quit()
except Exception as exc:
logger.warning(
f'Impossible d\'envoyer le courrier électronique : {exc}'
)
# Fonction qui essaie de deviner la date d'un RAA à partir de son nom.
# Utile pour limiter les requêtes lors de l'obtention des RAA à scanner.
def guess_date(string, regex):
try:
search = re.search(regex, string, re.IGNORECASE)
guessed_date = dateparser.parse(search.group(1))
if guessed_date is None:
raise Exception('La date est un objet None')
else:
return guessed_date
except Exception as exc:
logger.warning(
f'Impossible de deviner la date du terme {string} : {exc}'
)
return datetime.datetime(9999, 1, 1)