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icourse163-dl.py
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# -*- coding: utf-8 -*-
import random
import re
from bs4 import BeautifulSoup
import model
# -*- Main
def main(course_url):
config = model.config("settings.conf", "icourse163")
session = model.login(site="icourse163", conf=config)
http_session_id = session.cookies["NTESSTUDYSI"]
c_tid = re.search(r"(?:(learn)|(course))/(?P<id>(?P<c_id>[\w:+-]+)(\?tid=(?P<t_id>\d+))?)#?/?", course_url)
# Download cache list
main_list = []
srt_list = []
doc_list = []
# handle the course_url links to Get right courseId and termId
if c_tid:
if c_tid.group("t_id"): # 当使用者提供tid的时候默认使用使用者tid
term_id = c_tid.group("t_id")
info_url = "http://www.icourse163.org/course/{id}#/info".format(id=c_tid.group('id'))
else: # 否则通过info页面重新获取最新tid
term_id = None
print("No termId which you want to download.Will Choose the Lastest term.")
info_url = "http://www.icourse163.org/course/{id}#/info".format(id=c_tid.group('c_id')) # 使用课程默认地址
page_about = session.get(url=info_url)
if page_about.url == page_about.request.url: # 存在该课程
# 当课程不存在的时候会302重定向到http://www.icourse163.org/，通过检查返回、请求地址是否一致判断
page_about_bs = BeautifulSoup(page_about.text, "lxml")
course_info_raw = page_about_bs.find("script", text=re.compile(r"termDto")).string.replace("\n", "")
if term_id is None: # 没有提供tid时候自动寻找最新课程信息
term_id = re.search(r"termId : \"(\d+)\"", course_info_raw).group(1)
# 获取课程信息
course_page_title = re.search(r'(.+?)_(.+?)_(.+?)', page_about_bs.title.string)
course_title = model.clean_filename(course_page_title.group(1))
school = course_page_title.group(2)
teacher = model.sort_teacher(page_about_bs.find_all('h3', class_="f-fc3"))
folder = model.clean_filename('-'.join([course_title, school, teacher]))
print("The Download INFO:\n" # Output download course info
"link:{url}\nCourse:{folder}\nid:{id}\n".format(url=info_url, folder=folder, id=term_id))
main_path = model.generate_path([config.Download_Path, folder])
info_img_link = page_about_bs.find("div", id="j-courseImg").img["src"]
img_file_name = r"课程封面图-{title}.png".format(title=course_title)
img_file_path = model.generate_path([main_path, img_file_name])
print("课程封面图: {link}".format(link=info_img_link))
main_list.append((info_img_link, img_file_path))
# intro_video
video_search = re.search(r"videoId : \"(\d+)\"", course_info_raw)
if video_search:
payload = {
'callCount': 1,
'scriptSessionId': '${scriptSessionId}' + str(random.randint(0, 200)),
'httpSessionId': http_session_id,
'c0-scriptName': 'CourseBean',
'c0-methodName': 'getLessonUnitPreviewVo',
'c0-id': 0,
'c0-param0': video_search.group(1),
'c0-param1': 1,
'batchId': random.randint(1000000000000, 20000000000000)
}
ask_video_url = "http://www.icourse163.org/dwr/call/plaincall/CourseBean.getLessonUnitPreviewVo.dwr"
resp = session.post(url=ask_video_url, data=payload).text
for k in ['mp4ShdUrl', 'mp4HdUrl', 'mp4SdUrl']: # , 'flvShdUrl', 'flvHdUrl', 'flvSdUrl'
video_search_group = re.search(r's\d+.(?P<VideoType>' + str(k) + ')="(?P<dllink>.+?)";', resp)
if video_search_group:
info_video_link = video_search_group.group("dllink")
video_file_name = r"课程简介-{title}.mp4".format(title=course_title)
video_file_path = model.generate_path([main_path, video_file_name])
print("课程简介视频: {link}".format(link=info_video_link))
main_list.append((info_video_link, video_file_path))
break
else:
print("Not found this course in \"icourse163.org\",Check Please")
return
# Get course's chapter
payload = {
'callCount': 1,
'scriptSessionId': '${scriptSessionId}' + str(random.randint(0, 200)),
'httpSessionId': http_session_id,
'c0-scriptName': 'CourseBean',
'c0-methodName': 'getLastLearnedMocTermDto',
'c0-id': 0,
'c0-param0': term_id,
'batchId': random.randint(1000000000000, 20000000000000)
}
cs_url = 'http://www.icourse163.org/dwr/call/plaincall/CourseBean.getLastLearnedMocTermDto.dwr'
rdata = session.post(cs_url, data=payload, timeout=None).text
if re.search(r"var s\d+={}", rdata):
print("Generate Download information.")
# Data cleaning Reg
week_reg = re.compile(r"s\d+.contentId=null;"
r".+s\d+.lessons=(?P<lessons>s\d+)"
r".+s\d+.name=\"(?P<week_name>.+?)\"")
chapter_reg = re.compile(r"s\d+.chapterId=\d+;"
r".+s\d+.name=\"(?P<chapter_name>.+?)\"")
lesson_reg = re.compile(r"s\d+.anchorQuestions=(null|s\d+);"
r".+s\d+.contentId=(?P<contentId>\d+)"
r".+s\d+.contentType=(?P<contentType>\d+)"
r".+s\d+.id=(?P<id>\d+)"
r".+s\d+.name=\"(?P<lesson_name>.+?)\"")
# count_list
week_list = []
chapter_list = []
video_in_chapter_list = []
for line in rdata.splitlines():
if re.match(week_reg, line): # Week
week_re = re.search(week_reg, line)
week_name = model.clean_filename(model.raw_unicode_escape(week_re.group("week_name")))
week_list.append(week_name)
if re.match(chapter_reg, line): # Chapter
chapter_re = re.search(chapter_reg, line)
chapter_name = model.clean_filename(model.raw_unicode_escape(chapter_re.group("chapter_name")))
chapter_list.append(chapter_name)
print("\n", week_list[-1], chapter_list[-1])
video_in_chapter_list.append(0)
if re.match(lesson_reg, line):
lesson_re = re.search(lesson_reg, line)
lesson_loc_pattern = model.generate_path([week_list[-1], chapter_list[-1]])
lesson_name = model.clean_filename(model.raw_unicode_escape(lesson_re.group("lesson_name")))
lesson_content_type = int(lesson_re.group("contentType"))
# prepare data and post
payload = {
'callCount': 1,
'scriptSessionId': '${scriptSessionId}' + str(random.randint(0, 200)),
'httpSessionId': http_session_id,
'c0-scriptName': 'CourseBean',
'c0-methodName': 'getLessonUnitLearnVo',
'c0-id': 1,
'c0-param0': lesson_re.group("contentId"),
'c0-param1': lesson_content_type,
'c0-param2': 0,
'c0-param3': lesson_re.group("id"),
'batchId': random.randint(1000000000000, 20000000000000)
}
cs_url = 'http://www.icourse163.org/dwr/call/plaincall/CourseBean.getLessonUnitLearnVo.dwr'
rdata = session.post(cs_url, data=payload, timeout=None).text
# Sort data depend on it's contentType
# 1 -> Video ,2 -> Test ,3 -> Docs ,4 -> Rich text ,5 -> Examination ,6 -> Discussion
if lesson_content_type == 1: # Video
count = video_in_chapter_list[-1]
count_lesson_name = model.clean_filename("{0} {lesson}".format(count, lesson=lesson_name))
for k in ['mp4ShdUrl', 'mp4HdUrl', 'mp4SdUrl']: # , 'flvShdUrl', 'flvHdUrl', 'flvSdUrl'
if re.search(r's\d+.{0}=".+?";'.format(k), rdata):
k_type = re.search("mp4(.+)Url", k).group(1)
video_file_name = "{0}.mp4".format(count_lesson_name)
if k_type != "Shd":
video_file_name = "{0}_{type}.mp4".format(count_lesson_name, type=k_type)
video_link = re.search(r's\d+.' + str(k) + r'="(.+?\.mp4).+?";', rdata).group(1)
video_file_path = model.generate_path([main_path, lesson_loc_pattern, video_file_name])
main_list.append((video_link, video_file_path))
print("视频: \"{name}\" \"{link}\"".format(name=video_file_name, link=video_link))
break
# Subtitle
if config.Download_Srt:
srt_path = model.generate_path([main_path, "Srt", lesson_loc_pattern])
if re.search(r's\d+.name="\\u4E2D\\u6587";s\d+.url="(.+?)"', rdata): # Chinese
srt_chs_re = re.search(r's\d+.name="\\u4E2D\\u6587";s\d+.url="(?P<url>.+?)"', rdata)
srt_file_name = "{0}.chs.srt".format(count_lesson_name)
srt_file_path = model.generate_path([srt_path, srt_file_name])
srt_chs_link = srt_chs_re.group("url")
print("字幕Chs: \"{name}\" \"{link}\"".format(name=srt_file_name, link=srt_chs_link))
srt_list.append((srt_chs_link, srt_file_path))
if re.search(r's\d+.name="\\u82F1\\u6587";s\d+.url="(.+?)"', rdata): # English
srt_eng_re = re.search(r's\d+.name="\\u82F1\\u6587";s\d+.url="(?P<url>.+?)"', rdata)
srt_file_name = "{0}.eng.srt".format(lesson_name)
srt_file_path = model.generate_path([srt_path, srt_file_name])
srt_eng_link = srt_eng_re.group("url")
print("字幕Eng: \"{name}\" \"{link}\"".format(name=srt_file_name, link=srt_eng_link))
srt_list.append((srt_eng_link, srt_file_path))
video_in_chapter_list[-1] += 1
if lesson_content_type == 3 and config.Download_Docs: # Documentation
doc_link = str(re.search(r'textOrigUrl:"(.+?)"', rdata).group(1))
doc_name = "{0}.pdf".format(lesson_name)
doc_path = model.generate_path([main_path, "Docs", lesson_loc_pattern])
doc_file_path = model.generate_path([doc_path, doc_name])
doc_list.append((doc_link, doc_file_path))
print("文档: \"{name}\" \"{link}\"".format(name=doc_name, link=doc_link))
if config.Download:
if config.Download_Method == "Aria2": # 这里是调用aria2的下载
model.aira2_download(main_list)
# 需要session或者有时间期限的，仍然使用自建下载
model.download_queue(session, srt_list + doc_list, queue_length=config.Download_Queue_Length)
else: # 默认调用自建下载
model.download_queue(session, main_list + srt_list + doc_list,
queue_length=config.Download_Queue_Length)
else:
err_message = re.search(r'message:(.+)\}\)', rdata).group(1)
print("Error:{0},Please make sure you login by 163-email "
"and your \"Session-Cookies\" pair is right.".format(err_message))
else:
print("No course Id,Please check!")
return
if __name__ == '__main__':
course_url = "http://www.icourse163.org/course/BIT-1001870001#/info"
main(course_url)