import os, re, ssl, sys
import subprocess
import logging
import requests
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
import dateparser
from bs4 import BeautifulSoup
from pyvirtualdisplay import Display
from pdfminer.high_level import extract_text
from stem import Signal
from stem.control import Controller
import hashlib
import smtplib
import email
from mastodon import Mastodon
logger = logging.getLogger(__name__)
class RAAspotter:
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)
self.tor_get_new_id()
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:
logger.debug('Impossible de changer d\'identité Tor')
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(f'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(f'ATTENTION: la connexion a été interrompue pendant le 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}: {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(f'ATTENTION: Impossible d\'extraire le texte du fichier {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 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 : {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
else:
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 == 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 == 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 == 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)