├── .gitignore
├── .idea
├── CheggDownloader.iml
├── inspectionProfiles
│ └── Project_Default.xml
├── misc.xml
└── modules.xml
├── BookExporter.py
├── CheggDownloader.py
├── LICENSE
├── README.md
└── requirements.txt
/.gitignore:
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1 | # Virtualenv
2 | # http://iamzed.com/2009/05/07/a-primer-on-virtualenv/
3 | .Python
4 | [Bb]in
5 | [Ii]nclude
6 | [Ll]ib
7 | [Ll]ib64
8 | [Ll]ocal
9 | [Ss]cripts
10 | pyvenv.cfg
11 | .venv
12 | pip-selfcheck.json
13 |
14 | # Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
15 | # Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
16 |
17 | # User-specific stuff:
18 | .idea/**/workspace.xml
19 | .idea/**/tasks.xml
20 | .idea/dictionaries
21 |
22 | # Sensitive or high-churn files:
23 | .idea/**/dataSources/
24 | .idea/**/dataSources.ids
25 | .idea/**/dataSources.xml
26 | .idea/**/dataSources.local.xml
27 | .idea/**/sqlDataSources.xml
28 | .idea/**/dynamic.xml
29 | .idea/**/uiDesigner.xml
30 |
31 | # Gradle:
32 | .idea/**/gradle.xml
33 | .idea/**/libraries
34 |
35 | # CMake
36 | cmake-build-debug/
37 |
38 | # Mongo Explorer plugin:
39 | .idea/**/mongoSettings.xml
40 |
41 | ## File-based project format:
42 | *.iws
43 |
44 | ## Plugin-specific files:
45 |
46 | # IntelliJ
47 | out/
48 |
49 | # mpeltonen/sbt-idea plugin
50 | .idea_modules/
51 |
52 | # JIRA plugin
53 | atlassian-ide-plugin.xml
54 |
55 | # Cursive Clojure plugin
56 | .idea/replstate.xml
57 |
58 | # Crashlytics plugin (for Android Studio and IntelliJ)
59 | com_crashlytics_export_strings.xml
60 | crashlytics.properties
61 | crashlytics-build.properties
62 | fabric.properties
63 |
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/.idea/CheggDownloader.iml:
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/.idea/inspectionProfiles/Project_Default.xml:
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/.idea/misc.xml:
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/.idea/modules.xml:
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/BookExporter.py:
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1 | #!/bin/python
2 |
3 | import argparse
4 | import os
5 | import glob
6 | import json
7 | import shutil
8 | import urllib.parse
9 | import re
10 | import bs4 as bs
11 | import subprocess
12 |
13 | def get_path(url: str):
14 | urlpath = urllib.parse.urlparse(url).path
15 | match = re.search(r"^(/books/\d+)?/(.+?)(/content|/encrypted/\d+)?$", urlpath)
16 | path = match.group(2)
17 | if path[-8:].find(".") == -1:
18 | if str(match.group(3)).find("encrypted") >= 0:
19 | path += ".jpg"
20 | else:
21 | path += ".html"
22 | return path
23 |
24 | def export(dir, book_name, tmp_dir, out_dir):
25 | pages = []
26 |
27 | pages_files = glob.glob(os.path.join(dir, '*_pages.json'))[0]
28 | with open(pages_files) as f:
29 | pages = json.load(f)
30 |
31 | if len(pages) == 0:
32 | return
33 |
34 | print("Copying files")
35 | if os.path.isdir(tmp_dir):
36 | shutil.rmtree(tmp_dir)
37 | shutil.copytree(dir, tmp_dir)
38 |
39 | filelist = []
40 | pageimages = []
41 | with open(os.path.join(tmp_dir, 'renames.json')) as f:
42 | renames = json.load(f)
43 |
44 | print("Fixing files")
45 | for page in pages:
46 | path = get_path(page["absoluteURL"])
47 | changed = False
48 | file = os.path.join(tmp_dir, path)
49 | with open(file) as f:
50 | soup = bs.BeautifulSoup(f.read(), 'html.parser')
51 | for style in soup.head.find_all("style"):
52 | # some xhtml files contain "body{visibility:hidden}" making content invisible
53 | if style.string.find("visibility:hidden") != -1:
54 | style.decompose()
55 | changed = True
56 |
57 | for link in soup.find_all("link", href=True):
58 | if link["href"][0] == "/":
59 | new_path = get_path(link["href"])
60 | link["href"] = os.path.relpath(os.path.join(tmp_dir, new_path), os.path.dirname(file))
61 | changed = True
62 |
63 | for source in soup.find_all(["img", "script"], src=True):
64 | if source["src"][0] == "/":
65 | new_path = get_path(source["src"])
66 | if new_path in renames:
67 | new_path = renames[new_path]
68 | source["src"] = os.path.relpath(os.path.join(tmp_dir, new_path), os.path.dirname(file))
69 | changed = True
70 | if source.has_attr("id") and source["id"] == "pbk-page":
71 | pageimages.append(os.path.join(os.path.dirname(file), source["src"]));
72 |
73 | if changed:
74 | with open(file, "wb") as f:
75 | f.write(str(soup).encode("utf-8"))
76 |
77 | filelist.append(file)
78 |
79 | if len(pageimages) > 0:
80 | filelist = pageimages
81 |
82 | create_pdf(out_dir, book_name, filelist)
83 |
84 | def create_pdf(out_dir, book_name, filelist):
85 | print("Generating PDF, Please Wait! This will take a while.")
86 |
87 | outfile = os.path.join(out_dir, book_name + ".pdf")
88 |
89 | if filelist[0][-4:] == 'html':
90 | params = ["--no-pdf-compression", "--disable-javascript"]
91 | args = ["wkhtmltopdf"]
92 | else:
93 | params = []
94 | args = ["magick"]
95 |
96 | args = args + params + filelist + [outfile]
97 |
98 | result = subprocess.run(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
99 | print("Created {:s}".format(outfile))
100 | if result.returncode != 0:
101 | print(result.stderr)
102 | print("Warning! There was some error while creating PDF!")
103 |
104 |
105 |
106 | def main():
107 | parser = argparse.ArgumentParser()
108 | parser.add_argument('dir', type=str,
109 | help='path to a location of book')
110 |
111 | parser.add_argument('--book-name', type=str, default='Book',
112 | help='name of the book. Default=[%(default)s]')
113 | parser.add_argument('--tmp-dir', type=str, default='tmp',
114 | help='specify a directory to keep temporally files. Default=[%(default)s]')
115 | parser.add_argument('--out-dir', type=str, default='.',
116 | help='specify a directory where to save exported book. Default=[Current Directory]')
117 |
118 | args = parser.parse_args()
119 |
120 | try:
121 | os.makedirs(args.out_dir, exist_ok=True)
122 | except OSError as e:
123 | print("Unable to create output directory {:s}: {:s}"
124 | .format(args.out_dir, e))
125 |
126 | if not os.path.isdir(args.dir):
127 | print("Wrong location to book!")
128 | return
129 |
130 | export(args.dir, args.book_name, args.tmp_dir, args.out_dir)
131 |
132 | if __name__ == '__main__':
133 | main()
134 |
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/CheggDownloader.py:
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1 | import bs4 as bs
2 | import argparse
3 | import browser_cookie3 as cookies
4 | import os
5 | import requests
6 | import time
7 | import sys
8 | import webbrowser
9 | import json
10 | import re
11 | import urllib.parse
12 | import cgi
13 |
14 | BASE_URL = "https://jigsaw.chegg.com"
15 | API_URL = BASE_URL + "/api/v0"
16 | HTML_HEADERS = {
17 | 'upgrade-insecure-requests': "1",
18 | 'user-agent': "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_1) "
19 | "AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36",
20 | 'accept': "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",
21 | 'dnt': "1",
22 | 'referer': "https://ereader.chegg.com/",
23 | 'accept-encoding': "gzip, deflate, br",
24 | 'accept-language': "en",
25 | 'cache-control': "no-cache",
26 | 'X-Requested-With': 'XMLHttpRequest'
27 | }
28 | IMAGE_HEADERS = {
29 | 'user-agent': "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_1) "
30 | "AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36",
31 | 'accept': "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",
32 | 'dnt': "1",
33 | 'accept-encoding': "gzip, deflate, br",
34 | 'accept-language': "en",
35 | 'cache-control': "no-cache",
36 | }
37 |
38 | JAR = {c.name: c.value for c in cookies.chrome(domain_name='jigsaw.chegg.com')}
39 |
40 |
41 | def prompt_login() -> None:
42 | choice = input(
43 | "It seems that you have not logged into the Chegg eReader yet.\n"
44 | "You can also log in by copying a pasting the following URL into "
45 | "Google Chrome:\nhttps://ereader.chegg.com\n"
46 | "Would you like to open Google Chrome and log in? (Y/N) ")
47 | if choice.lower() == 'y':
48 | webbrowser.get('chrome').open('https://ereader.chegg.com')
49 |
50 |
51 | def get_response(url, querystring, max_retries, retry_delay) -> str:
52 | resp = None
53 | for i in range(0, max_retries):
54 | resp = requests.get(url, params=querystring, headers=HTML_HEADERS, cookies=JAR)
55 | if resp.status_code in [200, 401, 406]: # don't retry
56 | break
57 | print("[status={:d} attempt={:d}] Unable to download page {:s}: {:s}"
58 | .format(resp.status_code, i, url, str(resp.text)))
59 | time.sleep(retry_delay / 1000)
60 | if resp:
61 | return resp.text
62 | return ""
63 |
64 | def get_json_data(isbn: str, path: str, max_retries: int, retry_delay: int):
65 | url = API_URL + "/books/{:s}/{:s}".format(isbn, path)
66 | resp = get_response(url, {}, max_retries, retry_delay)
67 | if resp:
68 | return json.loads(resp)
69 | return None
70 |
71 | def get_pages(isbn: str, max_retries: int, retry_delay: int):
72 | return get_json_data(isbn, "pages", max_retries, retry_delay)
73 |
74 | def get_pagebreaks(isbn: str, max_retries: int, retry_delay: int):
75 | return get_json_data(isbn, "pagebreaks", max_retries, retry_delay)
76 |
77 | def get_toc(isbn: str, max_retries: int, retry_delay: int):
78 | return get_json_data(isbn, "toc", max_retries, retry_delay)
79 |
80 | def get_figures(isbn: str, max_retries: int, retry_delay: int):
81 | return get_json_data(isbn, "figures", max_retries, retry_delay)
82 |
83 | def get_ancillaries(isbn: str, max_retries: int, retry_delay: int):
84 | return get_json_data(isbn, "ancillaries", max_retries, retry_delay)
85 |
86 | def save_json_data(out_dir, name, data):
87 | with open(os.path.join(out_dir, "{:s}.json".format(name)), "w") as f:
88 | json.dump(data, f)
89 |
90 | def get_html(isbn: str, start: str, end: str, max_retries: int, retry_delay: int) -> str:
91 | url = API_URL + "/books/{:s}/print".format(isbn)
92 | querystring = {'from': start, 'to': end}
93 | return get_response(url, querystring, max_retries, retry_delay)
94 |
95 | def mark_renamed(source, target, out_dir):
96 | with open(os.path.join(out_dir, 'renames.json'), 'rb') as f:
97 | renames = json.load(f)
98 |
99 | prefixlen = len(os.path.abspath(out_dir))
100 | abssource = os.path.abspath(source)
101 | renames[abssource[prefixlen+1:]] = os.path.abspath(target)[prefixlen+1:]
102 | save_json_data(out_dir, "renames", renames)
103 |
104 | def download_image(url: str, path: str, out_dir: str, max_retries: int, retry_delay: int, rename: bool) -> bool:
105 | new_filename = None
106 | success = False
107 | with open(path, 'wb') as f:
108 | resp = None
109 | for i in range(0, max_retries):
110 | resp = requests.get(url, headers=IMAGE_HEADERS, cookies=JAR, stream=True)
111 | if resp.status_code == 200:
112 | if 'Content-Disposition' in resp.headers:
113 | value, params = cgi.parse_header(resp.headers['Content-Disposition'])
114 | if params['filename'] != os.path.basename(path):
115 | new_filename = os.path.join(os.path.dirname(path), params['filename'])
116 | if os.path.isfile(new_filename):
117 | print("File '{:s}' already exists, skipping download!".format(new_filename))
118 | mark_renamed(path, new_filename, out_dir)
119 | f.close()
120 | os.remove(path)
121 | return True
122 | break
123 | print("[status={:d} attempt={:d}] Unable to download {:s}: {:s}"
124 | .format(resp.status_code, i, url, str(resp.text)))
125 | time.sleep(retry_delay / 1000)
126 | if resp:
127 | for chunk in resp.iter_content(chunk_size=1024):
128 | f.write(chunk)
129 | success = True
130 |
131 | if success:
132 | if new_filename:
133 | mark_renamed(path, new_filename, out_dir)
134 | if rename:
135 | os.rename(path, new_filename)
136 | else:
137 | os.remove(path)
138 |
139 | return success
140 |
141 | def get_image(src: str, out_file: str, out_dir: str, max_retries: int, retry_delay: int) -> bool:
142 | url = API_URL + src
143 | return download_image(url, out_file, out_dir, max_retries, retry_delay, False)
144 |
145 | def get_filename(book_name: str, page_num: str, out_dir: str) -> str:
146 | filename = '{:s}_{:s}.png'.format(book_name, page_num)
147 | return os.path.join(out_dir, filename)
148 |
149 | def get_path(url: str):
150 | urlpath = urllib.parse.urlparse(url).path
151 | match = re.search(r"^(/books/\d+)?/(.+?)(/content|/encrypted/\d+)?$", urlpath)
152 | path = match.group(2)
153 | if path[-8:].find(".") == -1:
154 | if str(match.group(3)).find("encrypted") >= 0:
155 | path += ".jpg"
156 | else:
157 | path += ".html"
158 | return path
159 |
160 | def save_file(url: str, out_dir: str, cache: bool, callback) -> bool:
161 | if url[0:2] == "//":
162 | url = "https:" + url
163 | elif url[0] == "/":
164 | url = BASE_URL + url
165 |
166 | base_path = get_path(url)
167 | path = os.path.join(out_dir, base_path)
168 | os.makedirs(os.path.dirname(path), exist_ok=True)
169 | if cache and os.path.isfile(path):
170 | print("File '{:s}' already exists, skipping download!".format(base_path))
171 | return True
172 |
173 | return callback(url, path)
174 |
175 | def download_files(html: str, baseurl: str, out_dir: str,
176 | max_retries: int, retry_delay: int) -> bool:
177 | soup = bs.BeautifulSoup(html, 'html.parser')
178 | files = [t['href'] for t in soup.find_all('link', href=True)]
179 | files += [t['src'] for t in soup.find_all('img', src=True)]
180 | files += [t['src'] for t in soup.find_all('script', src=True)]
181 | # we should process 'style' too for CSS urls
182 |
183 | result = True
184 | for offset, src in enumerate(files):
185 | if src[0:4] != 'http' and src[0:1] != "/":
186 | src = baseurl + '/' + src
187 | print("Downloading file '{:s}' ({:d}/{:d})".format(src, offset + 1, len(files)))
188 | # if it's a CSS file we actually should process it too for urls
189 | if not save_file(src, out_dir, True, lambda url, path: download_image(url, path, out_dir, max_retries, retry_delay, True)):
190 | result = False
191 | return result
192 |
193 | def download_images(html: str, page: str,
194 | book_name: str, out_dir: str,
195 | max_retries: int, retry_delay: int) -> bool:
196 | soup = bs.BeautifulSoup(html, 'html.parser')
197 | images = [t['src'] for t in soup.find_all('img')]
198 | result = True
199 | for offset, src in enumerate(images):
200 | name = page
201 | if offset != 0:
202 | name = name + "_" + str(offset)
203 | if not get_image(src, get_filename(book_name, name, out_dir), out_dir, max_retries, retry_delay):
204 | result = False
205 | return result
206 |
207 |
208 | def download_single(isbn: str, page: str,
209 | book_name: str, out_dir: str,
210 | max_retries: int, retry_delay: int) -> bool:
211 | html = get_html(isbn, page, page, max_retries, retry_delay)
212 | soup = bs.BeautifulSoup(html, 'html.parser')
213 | images = [t['src'] for t in soup.find_all('img')]
214 | if images:
215 | if not get_image(images[0], get_filename(book_name, page, out_dir), out_dir, max_retries, retry_delay):
216 | return False
217 | return True
218 | return False
219 |
220 |
221 | def download_list(isbn: str, pages: list,
222 | book_name: str, out_dir: str,
223 | max_retries: int, retry_delay: int,
224 | quiet: bool=False) -> None:
225 | save_json_data(out_dir, "renames", {})
226 | failed_pages = []
227 | start_time = time.time()
228 | for page in pages:
229 | if not quiet:
230 | print("downloading page {:s}".format(page))
231 | if not download_single(isbn, str(page), book_name, out_dir, max_retries, retry_delay):
232 | failed_pages.append(page)
233 | end_time = time.time()
234 | print("downloaded {:d} pages in {:6.3f} seconds"
235 | .format(len(pages) - len(failed_pages) + 1, end_time - start_time))
236 | if failed_pages:
237 | print("failed pages: {:s}".format(str(failed_pages)))
238 |
239 |
240 | def download_range(isbn: str, start: int, end: int, interval: int,
241 | book_name: str, out_dir: str,
242 | max_retries: int, retry_delay: int,
243 | quiet: bool=False) -> None:
244 | save_json_data(out_dir, "renames", {})
245 | failed_pages = []
246 | start_time = time.time()
247 | for page in range(start, end, interval):
248 | html = get_html(isbn, str(page), str(page + interval - 1), max_retries, retry_delay)
249 | if not quiet:
250 | print("downloading page {:d}/{:d}".format(page, end))
251 | result = download_images(html, str(page), book_name, out_dir, max_retries, retry_delay)
252 | if not result:
253 | failed_pages.append(page + offset)
254 | end_time = time.time()
255 | print("downloaded {:d} pages in {:6.3f} seconds"
256 | .format((end - start) - len(failed_pages) + 1, end_time - start_time))
257 | if failed_pages:
258 | print("failed pages: {:s}".format(str(failed_pages)))
259 |
260 | def download_figures(figures, out_dir, max_retries, retry_delay):
261 | for i, figure in enumerate(figures):
262 | print("Downloading figure '{:s}' ({:d}/{:d})".format(str(figure["title"]), i + 1, len(figures)))
263 | if not save_file(figure["imageURL"], out_dir, True, lambda url, path: download_image(url, path, out_dir, max_retries, retry_delay, True)):
264 | break
265 |
266 |
267 | def download_all(isbn: str, quality: int, book_name: str, out_dir: str,
268 | max_retries: int, retry_delay: int,
269 | quiet: bool=False) -> None:
270 | failed_pages = []
271 | start_time = time.time()
272 |
273 | pages = get_pages(isbn, max_retries, retry_delay)
274 | if not pages:
275 | print('You need to login!')
276 | return False
277 |
278 | save_json_data(out_dir, "renames", {})
279 |
280 | save_json_data(out_dir, book_name + "_pages", pages)
281 |
282 | pagebreaks = get_pagebreaks(isbn, max_retries, retry_delay)
283 | save_json_data(out_dir, book_name + "_pagebreaks", pagebreaks)
284 |
285 | toc = get_toc(isbn, max_retries, retry_delay)
286 | save_json_data(out_dir, book_name + "_toc", toc)
287 |
288 | figures = get_figures(isbn, max_retries, retry_delay)
289 | save_json_data(out_dir, book_name + "_figures", figures)
290 |
291 | ancillaries = get_ancillaries(isbn, max_retries, retry_delay)
292 | save_json_data(out_dir, book_name + "_ancillaries", ancillaries)
293 |
294 | downloaded_urls = []
295 |
296 | download_figures(figures, out_dir, max_retries, retry_delay)
297 |
298 | for i, page in enumerate(pages):
299 | label = ""
300 | if "page" in page:
301 | label = page["page"]
302 | elif "number" in page:
303 | label = str(page["number"])
304 | elif "chapterTitle" in page:
305 | label = page["chapterTitle"]
306 |
307 | if not quiet:
308 | print("downloading page {:s} ({:d}/{:d})".format(label, i + 1, len(pages)))
309 |
310 | def page_saver(url, path):
311 | if url in downloaded_urls:
312 | return True
313 |
314 | html = get_response(url, {}, max_retries, retry_delay)
315 | if html.find('popup-signin') != -1:
316 | print('You need to login!')
317 | return False
318 |
319 | downloaded_urls.append(url)
320 | with open(path, "wb") as f:
321 | f.write(html.encode("utf-8"))
322 |
323 | urlparts = list(urllib.parse.urlsplit(url))
324 | urlparts[2] = os.path.dirname(urlparts[2])
325 | urlparts[3] = ''
326 | urlparts[4] = ''
327 | if not download_files(html, urllib.parse.urlunsplit(urlparts), out_dir, max_retries, retry_delay):
328 | failed_pages.append(url)
329 | return True
330 |
331 | if not save_file("{:s}?width={:d}".format(page["absoluteURL"], quality), out_dir, False, lambda url, path: page_saver(url, path)):
332 | break
333 |
334 | end_time = time.time()
335 | print("downloaded {:d} pages in {:6.3f} seconds"
336 | .format(len(pages) - len(failed_pages) + 1, end_time - start_time))
337 | if failed_pages:
338 | print("failed pages: {:s}".format(str(failed_pages)))
339 |
340 |
341 | def verify_args(args):
342 | if not args.start and not args.end and not args.pages:
343 | print("Fatal: you must either specify a range or a list of pages")
344 | sys.exit(-1)
345 |
346 |
347 | def main():
348 | parser = argparse.ArgumentParser()
349 | parser.add_argument('isbn', type=str,
350 | help='the e-ISBN of the book to download')
351 |
352 | page_group = parser.add_argument_group('pages')
353 | page_group.add_argument('start', type=int, nargs='?',
354 | help='starting page to download')
355 | page_group.add_argument('end', type=int, nargs='?',
356 | help='ending page to download')
357 | page_group.add_argument('-i', '--interval', type=int, default=2,
358 | help='maximum pages to query and download at once')
359 | page_group.add_argument('-p', '--pages', type=str, nargs='*',
360 | help='a list of pages to download, separated by space')
361 |
362 | error_group = parser.add_argument_group("error handling")
363 | error_group.add_argument('--max-retries', type=int, default=3,
364 | help='maximum number to retry downloading a page if it fails. Default=[%(default)d]')
365 | error_group.add_argument('--retry-delay', type=int, default=500,
366 | help='delay in milliseconds between retries. Default=[%(default)d]')
367 |
368 | parser.add_argument('--quality', type=int, default=2000,
369 | help='quality of the book to download. Default=[%(default)s]')
370 | parser.add_argument('--book-name', type=str, default='Book',
371 | help='name of the book to download. Default=[%(default)s]')
372 | parser.add_argument('--out-dir', type=str, default='.',
373 | help='specify a directory to save all images. Default=[Current Directory]')
374 |
375 | args = parser.parse_args()
376 |
377 | verify_args(args)
378 |
379 | if len(JAR) == 0:
380 | prompt_login()
381 | sys.exit(0)
382 | try:
383 | os.makedirs(args.out_dir, exist_ok=True)
384 | except OSError as e:
385 | print("Unable to create output directory {:s}: {:s}"
386 | .format(args.out_dir, e))
387 |
388 | if args.pages:
389 | if 'all' in args.pages:
390 | download_all(
391 | args.isbn,
392 | args.quality,
393 | args.book_name,
394 | args.out_dir,
395 | args.max_retries,
396 | args.retry_delay,
397 | )
398 | else:
399 | download_list(
400 | args.isbn,
401 | args.pages,
402 | args.book_name,
403 | args.out_dir,
404 | args.max_retries,
405 | args.retry_delay,
406 | )
407 | else:
408 | download_range(
409 | args.isbn,
410 | args.start,
411 | args.end,
412 | args.interval,
413 | args.book_name,
414 | args.out_dir,
415 | args.max_retries,
416 | args.retry_delay,
417 | )
418 |
419 |
420 | if __name__ == '__main__':
421 | main()
422 |
--------------------------------------------------------------------------------
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/README.md:
--------------------------------------------------------------------------------
1 | ## WARNING
2 | THIS TOOL IS NOT MEANT TO CIRCUMVENT COPYRIGHT PROTECTION. IT SHOULD ONLY BE USED TO DOWNLOAD ETEXTBOOKS THAT **YOU OWN**. REPRODUCING AND/OR DISTRIBUTING COPYRIGHTED WORK IS A CRIME IN MANY COUNTRIES AND JURISDICTIONS.
3 |
4 | CHEGG HAS UPDATED THEIR 14 DAY RETURN POLICY SO THAT THEY DO NOT HAVE TO GIVE YOU A REFUND IF YOU REACH THE MAXIMUM NUMBER OF PRINTED PAGES. PLEASE DO NOT ABUSE THEIR GENEROUS RETURN POLICY.
5 |
6 | # CheggDownloader
7 | This is a simple Python script that allows you to download an eTextbook from Chegg.com. Output (on the limited sample size that I have) will be stored as a separate PNG file for each page.
8 |
9 | ## Requirements
10 | 1. Python 3
11 | 2. Google Chrome
12 | 3. `browser_cookie3`
13 | 4. `requests`
14 | 5. The eTextbook you are downloading must allow itself to be printed (limited pages OK)
15 |
16 | ## Usage
17 | 1. Make sure that you have purchased the eTextbook from Chegg (they have a generous 14-day return policy).
18 | 2. **Using Chrome**, go to the eReader website (https://ereader.chegg.com) and log in.
19 | 3. Open the book you want to download. Record the e-ISBN number as shown in the URL. It should be the 13-digit number after `/books/`.
20 | 4. Click on the "Print" icon and record the maximum number of pages you are allowed to download at once (the larger the number, the faster the book can be downloaded).
21 | 5. Find the starting and ending page that you would like to download.
22 | 6. Start downloading
23 | ```bash
24 | $ pip install -r requirements.txt
25 | $ python3 CheggDownloader.py -i
26 | $ # Example
27 | $ python3 CheggDownloader.py 1234567890123 1 999 -i 5
28 | $ # Download to a specified folder (will be created is doesn't exist)
29 | $ python3 CheggDownloader.py 1234567890123 1 999 -i 5 --out-dir=book/
30 | ```
31 |
32 | ### Downloading unnumbered pages
33 | If some pages in the book are unnumbered, or are not numbered with Arabic numerals (e.g. numbered with Roman numerals), you may use
34 | ```bash
35 | $ python3 CheggDownloader.py -p
36 | $ # Example
37 | $ python3 CheggDownloader.py 1234567890123 -p i ii iii iv v
38 | ```
39 |
40 | ## Options
41 | See the help message: `python3 CheggDownloader.py -h`
42 | ```
43 | usage: CheggDownloader.py [-h] [-i INTERVAL] [-p [PAGES [PAGES ...]]]
44 | [--max-retries MAX_RETRIES]
45 | [--retry-delay RETRY_DELAY] [--book-name BOOK_NAME]
46 | [--out-dir OUT_DIR]
47 | isbn [start] [end]
48 |
49 | positional arguments:
50 | isbn the e-ISBN of the book to download
51 |
52 | optional arguments:
53 | -h, --help show this help message and exit
54 | --book-name BOOK_NAME
55 | name of the book to download. Default=[Book]
56 | --out-dir OUT_DIR specify a directory to save all images.
57 | Default=[Current Directory]
58 |
59 | pages:
60 | start starting page to download
61 | end ending page to download
62 | -i INTERVAL, --interval INTERVAL
63 | maximum pages to query and download at once
64 | -p [PAGES [PAGES ...]], --pages [PAGES [PAGES ...]]
65 | a list of pages to download, separated by space
66 |
67 | error handling:
68 | --max-retries MAX_RETRIES
69 | maximum number to retry downloading a page if it
70 | fails. Default=[3]
71 | --retry-delay RETRY_DELAY
72 | delay in milliseconds between retries. Default=[500]
73 | ```
74 |
--------------------------------------------------------------------------------
/requirements.txt:
--------------------------------------------------------------------------------
1 | beautifulsoup4
2 | browser_cookie3
3 | requests
--------------------------------------------------------------------------------