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GroupChecker.py
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GroupChecker.py
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# -*- coding: utf-8 -*-
import requests
import re
from sqlalchemy import func
from orm.Connection import Connection
from orm.Course import Course
from orm.Group import Group
from orm.GroupLog import GroupLog
from bs4 import BeautifulSoup
__author__ = 'Bartosz Jabłoński <[email protected]>'
class GroupChecker:
"""
This project would not succeed without Piotr Giedziun <[email protected]>
and his script for generating the schedule basing on Edukacja CL.
You can find it here: https://github.com/piotrgiedziun/plan_pwr
Usage:
subscriptions_id = 1234
checker = GroupChecker(subscriptions_id)
checker.login("somelogin", "somepass")
courses = checker.get_courses()
groups = checker.get_groups(courses.keys())
checker.logout()
"""
GET_COOKIES_URL = 'https://edukacja.pwr.wroc.pl/EdukacjaWeb/logOutUser.do'
LOGIN_URL = 'https://edukacja.pwr.wroc.pl/EdukacjaWeb/logInUser.do'
ZAPISY_COOKIES_URL = 'https://edukacja.pwr.wroc.pl/EdukacjaWeb/zapisy.do?event=WyborSluchacza'
ZAPISY_URL = 'https://edukacja.pwr.wroc.pl/EdukacjaWeb/zapisy.do?href=#hrefZapisySzczSlu'
ZAPISY_URL_X = 'https://edukacja.pwr.wroc.pl/EdukacjaWeb/zapisy.do?event=ZapiszFiltr&event=wyborKryterium&href=#hrefKryteriumFiltrowania'
ZAPISY_GUIDE_LINE_COOKIES_URL = 'https://edukacja.pwr.wroc.pl/EdukacjaWeb/zapisy.do?event=WyborSluchacza'
LOGOUT_URL = 'https://edukacja.pwr.wroc.pl/EdukacjaWeb/logOutUser.do'
ERROR_NO_ACCESS = 'Brak uprawnień dostępu do żądanego zasobu.'
ERROR_WRONG_LOGIN_PASS = 'Niepowodzenie logowania. Niepoprawna nazwa użytkownika'
ERROR_SERVER_OVERLOADED = 'Jesteś w tej chwili jednym z kilku tysięcy chętnych do odwiedzenia naszego portalu'
ERROR_BAD_TIME = 'Nie można wykonać tej akcji poza dozwolonymi terminami. Wykonujesz akcję w bloku z ograniczeniami, dla którego są one zabronione.'
INFO_WRONG_LOGIN_PASS = 'Nie jebłeś się w loginie lub haśle? Bo to co dałeś nie działa... (Wrong login or password)'
INFO_SERVER_OVERLOADED = 'Hue hue. Za dużo owieczek lgnie na rzeź! (Server overloaded)'
INFO_GROUP_QUOTA_NOT_FOUND = 'Group quota not found!'
INFO_TOKEN_NOT_FOUND = 'Token not found!'
INFO_BAD_TIME = 'Hue hue. Za późno >:D Nie możesz już tego zrobić >:D (Nie można wykonać tej akcji poza dozwolonymi terminami)'
ELEMENTS_PER_PAGE = 10
def __init__(self, subscriptions_id, use_db):
self.session = None
self.last_cookie = None
self.token = None
self.subscriptions_id = subscriptions_id
self.use_db = bool(use_db)
self.logs = []
if self.use_db:
self.connection = Connection.session()
pass
def login(self, login, password):
"""
Logs user in optaining cl.edu.web.TOKEN
:param login: User login
:param password: User password
:return:
"""
# Prepare request
token = self._get_token()
login_data = {
'login': login,
'password': password,
'cl.edu.web.TOKEN': token
}
login_response = requests.post(self.LOGIN_URL,
data=login_data,
cookies=self.last_cookie,
allow_redirects=True,
verify=True)
login_response_html = login_response.text
# Check if there was no login error
if self.ERROR_NO_ACCESS in login_response_html or self.ERROR_WRONG_LOGIN_PASS in login_response_html:
raise Exception(self.INFO_WRONG_LOGIN_PASS)
# Check if there was no server overloaded error
if self.ERROR_SERVER_OVERLOADED in login_response_html:
raise Exception(self.INFO_SERVER_OVERLOADED)
# Set session cookie
self.session = self._parse_session(login_response_html)
self.last_cookie = login_response.cookies
self.token = token
def logout(self):
"""
Log user out
:return:
"""
post_data = {
'clEduWebSESSIONTOKEN': self.session,
'cl.edu.web.TOKEN': self.token,
'wyloguj': ''
}
requests.post(self.LOGOUT_URL, data=post_data, cookies=self.last_cookie, allow_redirects=True, verify=True)
def get_courses(self):
self._navigate_to_courses()
courses_request_data = self._get_courses_groups_request()
total_return = requests.post(self.ZAPISY_URL_X, cookies=self.last_cookie, data=courses_request_data,
allow_redirects=False, verify=True)
self.last_cookie = total_return.cookies
return self._parse_course_vector_data(total_return.text.encode('utf-8'))
def get_groups(self, courses_codes):
"""
Gets all grupus data of all courses
:param courses_codes: List of course codes
:return: Full data
"""
self._navigate_to_courses()
full_data = {}
for course_code in courses_codes:
print('.', end="", flush=True)
full_data[course_code] = self.get_course_groups(course_code)
print("")
return full_data
def get_course_groups(self, course_code):
"""
Gets all groups data of specified course
:param course_code: Code of the course INZ001234L
:return: Full data
"""
current_page = 1
page_iterator_condition = True
max_page = None
groups = {}
# For each page of the pagination
while page_iterator_condition:
# Prepare request
page_data = self._prepare_group_paginator_value(current_page)
course_details_request = self._get_courses_groups_request(course_code=course_code,
additional_parameters=page_data)
# Send the request and extract html data and set the cookie
response = requests.post(self.ZAPISY_URL_X, cookies=self.last_cookie, data=course_details_request,
allow_redirects=False, verify=True)
html = response.text.replace('</br>', '')
self.last_cookie = response.cookies
# Check if proper data was received
if self.ERROR_BAD_TIME in html:
raise Exception(self.INFO_BAD_TIME)
# Parse current page groups
current_page_groups = self._parse_course_groups(html, course_code)
groups.update(current_page_groups)
# Exit loop if that was the last page
if max_page is None:
max_page = self._get_max_page(html)
current_page += 1
page_iterator_condition = current_page <= max_page
return groups
def _parse_session(self, html):
"""
Parses session information to obtain session token
:param html:
:return:
"""
p = re.compile(r'<input type="hidden" name="clEduWebSESSIONTOKEN" value="(?P<session>[a-zA-Z0-9=]+)">')
m = p.search(html)
if m is None:
raise Exception("Can't complie session")
return m.group('session')
def _get_token(self):
"""
Gets the session and token (also sets a cookie)
:return:
"""
get_cookies_r = requests.get(self.GET_COOKIES_URL, verify=True)
token = self._parse_token(get_cookies_r.text.encode('utf-8'))
# set cookie
self.last_cookie = get_cookies_r.cookies
return token
def _parse_token(self, html):
"""
Finds and returns Edukacja.CL navigation token
:param html:
:return:
"""
p = re.compile(r'<input type="hidden" name="cl.edu.web.TOKEN" value="(?P<token>[a-zA-Z0-9=]+)">')
m = p.search(html.decode("utf-8"))
if m is None:
raise Exception(self.INFO_TOKEN_NOT_FOUND)
return m.group('token')
def _navigate_to_courses(self):
# Get the schedule
zapisy_cookies_r = requests.get(self.ZAPISY_GUIDE_LINE_COOKIES_URL,
params={'clEduWebSESSIONTOKEN': self.session}, cookies=self.last_cookie,
verify=True)
zapisy_cookies_html = zapisy_cookies_r.text.encode('utf-8')
token = self._parse_token(zapisy_cookies_html)
zapisy_data = {'clEduWebSESSIONTOKEN': self.session,
'cl.edu.web.TOKEN': token,
'positionIterator': 'ZapisyROViewIterator',
'rowId': self.subscriptions_id,
'event_ZapisyPrzegladanieGrup': 'Przeglądanie grup'
}
zapisy_r = requests.post(self.ZAPISY_URL, cookies=self.last_cookie, data=zapisy_data, allow_redirects=True,
verify=True)
if self.ERROR_BAD_TIME in zapisy_r.text:
raise Exception(self.INFO_BAD_TIME)
# Set a cookie. OM NOM NOM NOM!
self.last_cookie = zapisy_r.cookies
self.token = self._parse_token(zapisy_r.text.encode('utf-8'))
def _parse_course_vector_data(self, page_html):
"""
Parses course data to extract course codes and names in this vector
:param page_html: HTML page to be parsed
:return: Array
"""
soup = BeautifulSoup(page_html, 'html.parser')
courses = soup.find_all(name="a", attrs={"title": "Wybierz wiersz"})
pretty_courses = {}
for course in courses:
course_code = str.strip(course.text)
pretty_courses[course_code] = {
"code": course_code,
"name": str.strip(course.parent.next_sibling.next_sibling.text), # 2 next sibling because of spaces
"type": course_code[-1:]
}
self._save_or_update_course(pretty_courses[course_code])
return pretty_courses
def _get_courses_groups_request(self, group_code="", course_code="", additional_parameters={}):
"""
Prepares search request for courses data
:param group_code: Group code search filter (i.e. Z00-12e)
:param course_code: Course code search filter (i.e. INZ001234L)
:return: Request dictionary
"""
base_data = {
"KryteriumFiltrowania": "Z_WEKTORA_ZAP",
"UczPpsId": "178883",
"UczSppId": "1111609",
"cl.edu.web.TOKEN": self.token,
"clEduWebSESSIONTOKEN": self.session,
"filtrCzyPowt": "",
"filtrCzyRez": "",
"filtrCzyZabl": "",
"filtrGodzDo": "",
"filtrGodzOd": "",
"filtrGrupyWDniu": "",
"filtrInePrNazwisko": "",
"filtrKodGrupy": group_code,
"filtrKodKursu": course_code,
"filtrNazwaKursu": "",
"ineJorId": "",
"ineJorSymbol": "",
"ineJorSymbol": "",
"ineJorSymbol_cl_edu_web_lov_callback": "/zapisy.do?event=forwardZapisy",
"ineJorSymbol_cl_edu_web_lov_callback_href": "hrefKryteriumFiltrowania",
"ineJorSymbol_cl_edu_web_lov_handlerClass": "cl.edu.web.common.lov.handlers.JednostkiOrganizacyjneLovHandler",
"uczWppId": "93647",
"uczWppNazwa": "PO-W08-INF- - -ST-Ii-WRO- - - - - -PWR1-DWU, W_PO-W08-INF- - -ST-Ii-WRO (2012/2013)/V9",
"uczWppNazwa": "93647",
"uczWppNazwa_cl_edu_web_lov_callback": "/zapisy.do?event=forwardZapisy",
"uczWppNazwa_cl_edu_web_lov_callback_href": "hrefKryteriumFiltrowania",
"uczWppNazwa_cl_edu_web_lov_handlerClass": "cl.edu.web.controller.logic.studiowanie.zapisy.WiazkiPnPsLovHandler",
"event_NoEvent": "Szukaj",
}
for key in additional_parameters.keys():
base_data[key] = additional_parameters[key]
return base_data
def _prepare_group_paginator_value(self, page):
return {
"pagingIterName": "GrupyZajecioweKursuWEKROViewIterator",
"pagingRangeStart": (page - 1) * self.ELEMENTS_PER_PAGE,
"event": "positionIterRangeStartGZK"
}
def _get_max_page(self, html_page):
soup = BeautifulSoup(html_page, 'html.parser')
tag = soup.find_all("input", {"value": ">>>"})[1]
if tag.has_attr("onclick"):
number_regex = re.compile(r"pagingRangeStartGrupyZajecioweKursuWEKROViewIteratorId', '(?P<number>[0-9]+)'")
result = number_regex.search(tag["onclick"])
max_item_count_start = result.group("number").strip()
page = (int(max_item_count_start) / self.ELEMENTS_PER_PAGE) + 1
else:
page = 1
return page
def _parse_course_groups(self, html, course_code):
"""
Parses all groups for given page
:param html:
:return: Parsed groups
"""
soup = BeautifulSoup(html, 'html.parser')
groups_table = soup.find(name="a", attrs={"name": "hrefGrupyZajecioweKursuTabela"}) \
.find_next_sibling(name="table", attrs={"class": "KOLOROWA"})
first_row = self._get_nth_sibling(groups_table.tr, 4)
groups = {}
condition_regex = re.compile(r'Z[0-9]{2}-.{2,5}')
condition = True
first_row = first_row.next_sibling.next_sibling
while condition:
group_data = self._parse_course_group(first_row, course_code)
groups[group_data[0]['code']] = group_data[0]
first_row = group_data[1]
condition = first_row.next_sibling != None and \
first_row.next_sibling.next_sibling != None
alternative_one = self._get_nth_sibling(first_row, 2).td.has_attr("rowspan") and \
condition_regex.match(self._get_nth_sibling(first_row, 2).td.text.strip()) is not None
alternative_two = self._get_nth_sibling(first_row, 2).has_attr("class") and \
self._get_nth_sibling(first_row, 2)['class'][0] == "uwagi_hide" and \
self._get_nth_sibling(first_row, 4) is not None and \
self._get_nth_sibling(first_row, 4).td.has_attr("rowspan") and \
condition_regex.match(self._get_nth_sibling(first_row, 4).td.text.strip()) is not None
if condition and alternative_one:
first_row = self._get_nth_sibling(first_row, 2)
elif condition and alternative_two:
first_row = self._get_nth_sibling(first_row, 4)
condition = condition and (alternative_one or alternative_two)
self._commit_to_db()
return groups
def _parse_course_group(self, first_row, course_code):
"""
Parses 3-row data of the group
:param first_row: First row from 3 row data in Edukacja (BeautifulSoup)
:return: Parsed data, and reference to last row
"""
second_row = self._get_nth_sibling(first_row, 2)
third_row = self._get_nth_sibling(second_row, 2)
quota = self._get_nth_sibling(first_row.td, 6).text
group_data = {
'code': first_row.td.text.strip(),
'taken': self._parse_quota(quota, 0),
'capacity': self._parse_quota(quota, 1),
'lecturer': re.sub(r'\s+', ' ', second_row.td.text.strip())}
group_data.update(self._parse_place_and_time(third_row.td.text.strip()))
# Save to DB
self._save_or_update_group(group_data, course_code, True)
return [group_data, third_row]
@staticmethod
def _parse_quota(quota_text, part):
"""
Parses quota string returning either capacity or already subscribed student count
:param quota_text: Text of the quota 12/30
:param part: 1 - subscribed, 2 - capacity
:return: Number of subscribed or capacity
"""
split_quota = quota_text.strip().split('/')
return split_quota[part]
@staticmethod
def _parse_place_and_time(place_time):
"""
Parses time and place string extracting vital information like building
or room as well as time
:param place_time: String to be parsed
:return: Parsed array
"""
regex = re.compile(
r'(?P<day>(pn|wt|śr|cz|pt)(/TN |/TP |[ ]))(?P<start>[0-9]+:[0-9]+)-(?P<end>[0-9]+:[0-9]+), bud. (?P<building>[\w\-]+), sala (?P<room>[\w]+)')
regex_result = regex.search(place_time)
data = {}
if regex_result is not None:
data['day'] = regex_result.group('day').strip()
data['start'] = regex_result.group('start')
data['end'] = regex_result.group('end')
data['building'] = regex_result.group('building')
data['room'] = regex_result.group('room')
else:
data['day'] = "?"
data['start'] = "00:00"
data['end'] = "00:00"
data['building'] = "?"
data['room'] = "?"
return data
@staticmethod
def _get_nth_sibling(soup_tag, sibling_count):
"""
Returns nth sibling of given BeautifulSoup tag
:param soup_tag:
:param sibling_count:
:return:
"""
while sibling_count > 0:
soup_tag = soup_tag.next_sibling
sibling_count -= 1
return soup_tag
def _save_or_update_course(self, course_data):
"""
Saves or updates course data
:param course_data:
:return:
"""
if not self.use_db:
return
course = self.connection.query(Course).filter(Course.id_course == course_data["code"]).first()
if course is None:
course = Course(id_course=course_data["code"], name=course_data["name"], type=course_data["type"])
self.connection.add(course)
self.connection.commit()
elif course.name is not course_data["name"] or course.type is not course_data["type"]:
course.name = course_data["name"]
course.type = course_data["type"]
self.connection.commit()
def _save_or_update_group(self, group_data, course, log_change=True):
"""
Updates or saves group and if specified, creates a log entry
:param group_data:
:param course:
:param log_change:
:return:
"""
log_change = False # Logging feature is not working!
if not self.use_db:
return
group = self.connection.query(Group).filter(Group.id_group == group_data["code"]).first()
if group is None:
group = Group(id_group=group_data["code"], id_course=course, assigned=group_data["taken"], capacity=group_data["capacity"])
group.last_change = None
self.connection.add(group)
if int(group.assigned) != int(group_data["taken"]):
group.last_change = func.now()
self.connection.add(group)
group.assigned = group_data["taken"]
group.capacity = group_data["capacity"]
group.day = None if group_data["day"] is "?" else self._parse_day(group_data["day"])
group.week = None if group_data["day"] is "?" else self._parse_week(group_data["day"])
group.start = None if group_data["start"] is "00:00" else group_data["start"]
group.end = None if group_data["start"] is "00:00" else group_data["end"]
group.building = None if group_data["building"] is "?" else group_data["building"]
group.room = None if group_data["room"] is "?" else group_data["room"]
group.lecturer = None if group_data["lecturer"] is "?" else group_data["lecturer"]
group.updated = func.now()
if log_change:
group_log = GroupLog(id_group=group_data["code"], assigned=group_data["taken"])
group_log.check_time = func.now()
self.logs.append(group_log)
def _parse_week(self, string):
"""
Parses week number
:param string:
:return:
"""
return "Odd" if "/TN" in string else "Even" if "/TP" in string else None
def _parse_day(self, string):
"""
Parses day
:param string:
:return:
"""
if "pn" in string:
return 1
elif "wt" in string:
return 2
elif "śr" in string:
return 3
elif "cz" in string:
return 4
elif "pt" in string:
return 5
else:
return None
def _commit_to_db(self):
"""
Commits sql changes
:return:
"""
if self.use_db:
self.connection.commit()
for group_log in self.logs:
self.connection.add(group_log)
self.connection.commit()
self.logs = []