def __init__(self, username, password, dirname,
jsonfile="cache.json",
url="https://edimension.sutd.edu.sg/",
webportalurl="https://edimension.sutd.edu.sg/webapps/portal/execute/tabs/tabAction"):
self.url = url
self.webportalurl = webportalurl
self.jsonfile = jsonfile
self.dirname = dirname
self.json_dict = dict()
self.session = None
self.on_exit = False # for __exit__ compatibility
self.i_size = 3
# if dirname is not absolute,
# change it to absolute
if not os.path.isabs(self.dirname):
self.dirname = os.path.join(os.getcwd(), self.dirname)
# make dir is dir does not exist
if not os.path.isdir(self.dirname):
os.mkdir(self.dirname)
ut.printWithIndent(self.dirname + " directory created")
# get repeat-download json checker file
# and create file in case it does not exist
if not os.path.isabs(self.jsonfile):
self.jsonfile = os.path.join(self.dirname, self.jsonfile)
codecs.open(self.jsonfile, 'a', encoding="utf-8").close()
with codecs.open(self.jsonfile, 'r+', encoding="utf-8") as j_f:
# if dict does not exist, create one
try:
self.json_dict = json.load(j_f)
except ValueError:
self.json_dict = {}
# set login payload
payload = {"user_id": username,
"password": password,
"persistent": "1"}
########################################
# Required for persistent session access
self.session = requests.session()
self.req_with_check("post",
self.new_urljoin(self.url,
"/webapps/login/"),
data=payload, message="Login success!")
def req_with_check(self, method, *args, **kwargs):
# requests.get with error checking
indent, message = 0, None
if "message" in kwargs:
message = kwargs["message"]
kwargs.pop("message", None)
if "indent" in kwargs:
indent = kwargs["indent"]
kwargs.pop("indent", None)
r = getattr(self.session, method)(*args, **kwargs)
if r.status_code != 200:
try:
r.raise_for_status()
except requests.exceptions.HTTPError as e:
print("Error: %s" % e)
print("Ignored...")
else:
if message:
ut.printWithIndent(message, indent, QUIET)
return r
def _courseMenuSearch(self, soup, absdir=None, indent=0):
# set absdir default
if not absdir:
absdir = self.dirname
ut.printWithIndent("Searching course menu...", indent, QUIET)
course_menu = soup.select(".courseMenu")
course_list = {}
if not course_menu:
ut.printWithIndent("Directory empty.", indent, QUIET)
else:
course_menu = course_menu[0]
for course in course_menu.find_all("li", recursive=False):
a = course.select("a")
if not a:
continue
a = a[0]
url = a.get("href").strip()
text = a.getText().strip()
# skip home page
if text in ("Home Page", "Information", "Discussions",
"Groups", "Tools", "Help"):
continue
text = self.text_sanitize(text)
course_list[text] = url
# make dir for each link and access
for link_chosen in course_list:
abs_link_dir = os.path.join(absdir, link_chosen)
if not os.path.isdir(abs_link_dir):
os.mkdir(abs_link_dir)
ut.printWithIndent(
abs_link_dir + " directory created", indent, QUIET)
# access course
link_url = course_list[link_chosen]
abs_link_url = self.new_urljoin(self.url, link_url)
message = link_chosen + " link accessed."
link_r = self.req_with_check("get", abs_link_url,
message=message, indent=indent)
link_soup = BeautifulSoup(link_r.text, 'html.parser')
# Search content list
self._contentListSearch(
link_soup, abs_link_dir, indent + self.i_size)
def _courseListingSearch(self, soup, indent=0):
"""
Searches the .courseListing list for all the links
to all modules
"""
ut.printWithIndent("Searching course listing...", indent)
course_listing = soup.select(".courseListing")
if not course_listing:
ut.printWithIndent("Directory empty.", QUIET)
else:
course_listing = course_listing[0]
# To get a formatted version of the module name
mod_name_format = re.compile(": .+?$")
for course in course_listing.find_all("li", recursive=False):
a = course.select("a")
if not a:
continue
a = a[0]
url = a.get("href").strip()
text = a.getText().strip()
# Format text
text = mod_name_format.findall(text)
if not text:
continue
text = self.text_sanitize(text[-1][2:])
# Make dir for each course and access
abs_course_dir = os.path.join(self.dirname, text)
if not os.path.isdir(abs_course_dir):
os.mkdir(abs_course_dir)
ut.printWithIndent(
self.dirname + " directory created.", indent)
# Access course
abs_course_url = self.new_urljoin(self.url, url)
message = text + " course accessed."
course_r = self.req_with_check("get", abs_course_url,
message=message, indent=indent)
course_soup = BeautifulSoup(course_r.text, 'html.parser')
# search course Menu
self._courseMenuSearch(
course_soup, abs_course_dir, indent=indent + self.i_size)
def _contentListSearch(self, soup, absdir=None, indent=0):
# set absdir default
if not absdir:
absdir = self.dirname
ut.printWithIndent("Searching content list...", indent, QUIET)
course_listing = soup.select(".contentList")
if course_listing:
course_listing = course_listing[0]
if not course_listing:
ut.printWithIndent("Directory empty.", indent, QUIET)
else:
for course in course_listing.find_all("li", recursive=False):
# recursive False: only direct children
a = course.select("a")
if not a: # no link
continue
else:
a = a[0]
url = a.get("href").strip()
text_file = self.text_sanitize(a.getText().strip())
abs_url = self.new_urljoin(self.url, url)
r = self.req_with_check("get", abs_url, stream=True)
# stream=True enables download of content
# only after content is accessed e.g. r.content
# check if html
if "text/html" not in r.headers['content-type']:
# ut.printWithIndent(r.headers['content-type'], indent, QUIET)
# get extension of file
ext = mimetypes.guess_extension(r.headers['content-type'])
# check if course["id"] in self.json_dict
ut.printWithIndent(
"Looking at " + text_file, indent, QUIET)
if course["id"] not in self.json_dict:
# append course["id"] to self.json_dict for cache
self.json_dict[course["id"]] = 1
# start download
ut.printWithIndent("Downloading " + text_file, indent)
if not ext: # weird file
continue
# path/to/dir/text_file.ext
if not text_file.endswith(ext):
filename = os.path.join(
absdir, text_file + "." + ext)
else:
filename = os.path.join(absdir, text_file)
with codecs.open(filename, "wb") as out_file:
r.raw.decode_content = True
ut.copyfileobjprint(
r.raw, out_file)
# print("Magic test:")
# print(magic.from_file(filename))
else:
ut.printWithIndent(text_file + " accessed.", indent, QUIET)
abs_link_dir = os.path.join(absdir, text_file)
if not os.path.isdir(abs_link_dir):
os.mkdir(abs_link_dir)
ut.printWithIndent(
text_file + " directory created", indent)
url_soup = BeautifulSoup(r.text, "html.parser")
self._contentListSearch(
url_soup, abs_link_dir, indent=indent + self.i_size)
def _on_exit(self):
ut.printWithIndent("EXITING!")
with codecs.open(self.jsonfile, "w") as f:
json.dump(self.json_dict, f, ensure_ascii=False)
