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thu_learn.py
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thu_learn.py
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# -*- coding: utf-8 -*-
__author__ = 'kehao'
import requests
from bs4 import BeautifulSoup, Comment
import re
import os
# global vars
_session = requests.session()
_URL_BASE = 'https://learn.tsinghua.edu.cn'
_URL_LOGIN = _URL_BASE + '/MultiLanguage/lesson/teacher/loginteacher.jsp'
# 学期
_URL_CURRENT_SEMESTER = 'http://learn.tsinghua.edu.cn/MultiLanguage/lesson/student/MyCourse.jsp?typepage=1'
_URL_PAST_SEMESTER = 'http://learn.tsinghua.edu.cn/MultiLanguage/lesson/student/MyCourse.jsp?typepage=2'
# 个人信息
_URL_PERSONAL_INFO = 'http://learn.tsinghua.edu.cn/MultiLanguage/vspace/vspace_userinfo1.jsp'
# 课程不同板块前缀
# 课程公告
_PREF_MSG = 'http://learn.tsinghua.edu.cn/MultiLanguage/public/bbs/getnoteid_student.jsp?course_id='
# 课程信息
_PREF_INFO = 'http://learn.tsinghua.edu.cn/MultiLanguage/lesson/student/course_info.jsp?course_id='
# 课程文件
_PREF_FILES = 'http://learn.tsinghua.edu.cn/MultiLanguage/lesson/student/download.jsp?course_id='
# 教学资源
_PREF_LIST = 'http://learn.tsinghua.edu.cn/MultiLanguage/lesson/student/ware_list.jsp?course_id='
# 课程作业
_PREF_WORK = 'http://learn.tsinghua.edu.cn/MultiLanguage/lesson/student/hom_wk_brw.jsp?course_id='
def login(user_id=None, user_pass=None):
"""
login to get cookies in _session
:param user_id: your Tsinghua id "keh13" for example
:param user_pass: your password
:return:True if succeed
"""
if user_id is None or user_pass is None:
user_id = input("TsinghuaId:")
user_pass = input("Password:")
data = dict(
userid=user_id,
userpass=user_pass,
)
r = _session.post(_URL_LOGIN, data)
# 即使登录失败也是200所以根据返回内容简单区分了
if len(r.content) > 120:
return False
else:
return True
def make_soup(url):
"""
_session.GET the page, handle the encoding and return the BeautifulSoup
:param url: Page url
:return: BeautifulSoup
"""
r = _session.get(url)
r.encoding = 'bgk'
soup = BeautifulSoup(r.content, "html.parser")
return soup
class Semester:
"""
Class Semester have all courses in it
"""
def __init__(self, current=True):
"""
set the current flag to get current/past Semester
:param current: Boolean True/False for Current/Past semester
:return: None
"""
if _session is None:
raise RuntimeError("Call login(userid, userpass) before anything else")
if current:
self.url = _URL_CURRENT_SEMESTER
else:
self.url = _URL_PAST_SEMESTER
self.soup = make_soup(self.url)
pass
@property
def courses(self):
"""
return all the courses under the semester
:return: Courses generator
"""
for j in self.soup.find_all('tr', class_=['info_tr', 'info_tr2']):
i = j.find('a')
url = i['href']
if url.startswith('/Mult'):
url = _URL_BASE + url
else:
# !!important!! ignore the new WebLearning Courses At This moment
continue
name = i.contents[0]
name = re.sub(r'[\n\r\t ]', '', name)
id = url[-6:]
yield Course(name=name, url=url, id=id)
class Course:
"""
this is the Course class
"""
def __init__(self, id, url=None, name=None):
self._id = id
self._url = url
self._name = name
self.r = None
@property
def url(self):
"""course url"""
return self._url
@property
def name(self):
"""course name"""
return self._name
@property
def id(self):
"""courses id"""
return self._id
@property
def works(self):
"""
get all the work in course
:return: Work generator
"""
url = _PREF_WORK + self._id
soup = make_soup(url)
for i in soup.find_all('tr', class_=['tr1', 'tr2']):
tds = i.find_all('td')
url = 'http://learn.tsinghua.edu.cn/MultiLanguage/lesson/student/' + i.find('a')['href']
id = re.search(r'(\d+)', url).group(0)
title = i.find('a').contents[0]
start_time = tds[1].contents[0]
end_time = tds[2].contents[0]
yield Work(id=id, title=title, url=url, start_time=start_time, end_time=end_time)
@property
def messages(self):
"""
get all messages in course
:return: Message generator
"""
url = _PREF_MSG + self.id
soup = make_soup(url)
for m in soup.find_all('tr', class_=['tr1', 'tr2']):
tds = m.find_all('td')
title = tds[1].contents[1].text
print(title)
url = 'http://learn.tsinghua.edu.cn/MultiLanguage/public/bbs/' + tds[1].contents[1]['href']
date = tds[3].text
yield Message(title=title, url=url, date=date)
# TODO
@property
def files(self):
"""
get all files in course
:return: File generator
"""
url = _PREF_FILES + self.id
soup = make_soup(url)
for j in soup.find_all('tr', class_=['tr1', 'tr2']):
name = re.search(r'getfilelink=([^&]+)&', str(j.find(text=lambda text: isinstance(text, Comment)))).group(1)
a = j.find('a')
url = 'http://learn.tsinghua.edu.cn/kejian/data/%s/download/%s' % (self.id, name)
title = re.sub(r'[\n\r\t ]', '', a.contents[0])
yield File(name=name, url=url)
pass
@property
def info(self):
url = _PREF_INFO + self.id
return Info(url)
class Work:
"""
the homework class
"""
def __init__(self, url=None, id=None, title=None, start_time=None, end_time=None):
self._url = url
self._id = id
self._title = title
self._details = None
self._file = None
self._start_time = start_time
self._end_time = end_time
self.soup = make_soup(self.url)
pass
@property
def url(self):
"""work url"""
return self._url
@property
def id(self):
"""work id"""
return self._id
@property
def title(self):
"""work title"""
return self._title
@property
def start_time(self):
"""
start date of the work
:return:str time 'yyyy-mm-dd'
"""
return self._start_time
@property
def end_time(self):
"""
end date of the work
:return: str time 'yyyy-mm-dd'
"""
return self._end_time
@property
def details(self):
"""
the description of the work
:return:str details /None if not exists
"""
if self._details is None:
try:
self._details = self.soup.find_all('td', class_='tr_2')[1].textarea.contents[0]
except:
pass
return self._details
@property
def file(self):
"""
the file attached to the work
:return: Instance of File/None if not exists
"""
if self._file is None:
try:
fname = self.soup.find_all('td', class_='tr_2')[2].a.contents[0]
furl = 'http://learn.tsinghua.edu.cn' + self.soup.find_all('td', class_='tr_2')[2].a['href']
self._file = File(url=furl, name=fname)
except:
pass
return self._file
class File:
def __init__(self, url, name, note=None):
self._name = name
self._url = url
self._note = note
def save(self, root='.'):
r = requests.get(self.url, stream=True)
with open(root + '/' + self.name, 'wb') as handle:
if not r.ok:
raise ValueError('failed in saving file', self.name, self.url)
for block in r.iter_content(1024):
handle.write(block)
@property
def name(self):
"""file name
Note! the file name is the name on the web but not the name in the download link
"""
return self._name
@property
def url(self):
"""download url"""
return self._url
@property
def note(self):
"""the description of the file
this will exits under the CourseFile area but not in work area
# considering take course.details as note
"""
return self._note
class Message:
def __init__(self, url, title, date):
self._url = url
self._title = title
self._date = date
self._details = None
@property
def url(self):
return self._url
@property
def title(self):
return self._title
@property
def date(self):
return self._date
@property
def details(self):
if self._details is None:
soup = make_soup(self.url)
self._details = soup.find_all('td', class_='tr_l2')[1].text.replace('\xa0', ' ')
self._details = re.sub('(\\xa0)+', ' ', self._details)
self._details = re.sub('\n+', '\n', self._details)
return self._details
class Info:
class Teacher:
def __init__(self, name, email, phone, intro):
self.name = name
self.email = email
self.phone = phone
self.intro = intro
def __init__(self, url):
self.soup = make_soup(url)
tds = self.soup.find_all('td')
self._课程编号 = tds[4].text.replace(" ", "")
self._课程序号 = tds[6].text.replace(" ", "")
self._课程名称 = tds[8].text.replace(" ", "")
self._学分 = tds[10].text.replace(" ", "")
self._学时 = tds[12].text.replace(" ", "")
self._指定教材 = tds[27].text.replace(" ", "")
self._参考数目 = tds[29].text.replace(" ", "")
self._考核方式 = tds[31].text.replace(" ", "")
self._课程简介 = tds[33].text.replace(" ", "")
self._teacher = self.Teacher(
name=tds[19].text.replace("\xa0", ""),
email=tds[21].text.replace("\xa0", ""),
phone=tds[23].text[1:].split(";"),
intro=re.sub(r'[\r\t ]', '', tds[25].text),
)
def main():
from tests import test
test.main()
if __name__ == '__main__':
main()