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unkindle.py
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import argparse
from io import BytesIO
import os
from pathlib import Path
import re
import requests
import shutil
from third_party.ion import DrmIon,DrmIonVoucher
from yj_to_folder import KFX_CBZ
import amazon_api
import config
class Kindle:
def __init__(self, asin, ignore_hdv = False, hdv_png = True):
self.asin = asin
self.session = requests.Session()
self.ignore_hdv = ignore_hdv
self.hdv_png = hdv_png
print("Authenticating . . .")
self.auth_state = amazon_api.login(None, None, config.DOMAIN)
if not self.auth_state:
raise Exception("Could not authenticate!")
print("Authenticated!")
def decrypt_voucher(self, voucher_data):
with BytesIO(voucher_data) as voucher_data_io:
voucher = DrmIonVoucher(voucher_data_io, self.auth_state["device"]["device_id"], "")
voucher.parse()
voucher.decryptvoucher()
return voucher
def decrypt_kfx(self, kfx_data):
if kfx_data[:8] != b'\xeaDRMION\xee':
return kfx_data
with BytesIO() as decrypted_data:
DrmIon(BytesIO(kfx_data[8:-8]), lambda name: self.drm_voucher).parse(decrypted_data)
return decrypted_data.getvalue()
# TODO: async
def get_resource(self, resource):
resp = self.session.send(
amazon_api.signed_request(
"GET",
resource["endpoint"]["url"],
asin = self.asin,
state = self.auth_state,
request_id = resource["id"],
request_type = resource["type"]
)
)
filename = resource["id"]
if resource["type"] == "DRM_VOUCHER":
filename += ".ast"
elif resource["type"] == "KINDLE_MAIN_METADATA" or resource["type"] == "KINDLE_MAIN_BASE" or resource["type"] == "KINDLE_MAIN_ATTACHABLE":
filename += ".kfx"
return (resp.content, filename)
def get_book(self):
manifest_resp = self.session.send(
amazon_api.signed_request(
"GET",
config.API_MANIFEST_URL + self.asin + config.API_VOUCHER_VERSIONS,
asin = self.asin,
state = self.auth_state,
request_type="manifest"
)
)
if manifest_resp.status_code != 200:
print(manifest_resp.text)
print("Could not acquire the manifest!")
return False
self.resources = manifest_resp.json()["resources"]
drm_voucher = [resource for resource in self.resources if resource["type"] == "DRM_VOUCHER"][0]
drm_voucher, drm_voucher_filename = self.get_resource(drm_voucher)
try:
self.drm_voucher = self.decrypt_voucher(drm_voucher)
except:
print("Could not decrypt the drm voucher!")
return False
# TODO: get metadata here
# decoding it with kfxlib is a bit tricky, and for some books for some reason decoding
# it before everything else is acquired makes it impossible to decode the rest of the book
# could also get metadata from an api
total = 0
for resource in [resource for resource in self.resources if "size" in resource]:
total += resource["size"]
print(f"Download size: {int(total/1024/1024)}MB")
return True
def download(self, output_folder = None, keep_temp = False):
if not output_folder:
output_folder = os.path.join(os.getcwd(), "output")
self.output_folder = output_folder
self.temp_folder = os.path.join(output_folder, self.asin)
if os.path.exists(self.temp_folder):
shutil.rmtree(self.temp_folder)
Path(self.output_folder).mkdir(exist_ok=True)
Path(self.temp_folder).mkdir(exist_ok=True)
# TODO: parallel downloads
i = 0
for resource in self.resources[i:]:
print(f"Downloading the book . . . {int(i/len(self.resources)*100)}%\r", end="")
data, filename = self.get_resource(resource)
with open(os.path.join(self.temp_folder, filename), "wb") as f:
if filename.endswith(".kfx"):
data = self.decrypt_kfx(data)
f.write(data)
i += 1
print("\nExtracting . . . ")
self.book = KFX_CBZ(self.temp_folder, self.ignore_hdv, self.hdv_png)
group_name = 'group'
metadata = self.book.get_metadata()
if "Vol." in metadata.title:
title, vol = metadata.title.split("Vol.")
vol = re.findall(r'\d+', vol)[0]
self.release_name = f"{title.strip()} v{vol.strip().zfill(2)} "
elif " #" in metadata.title:
title, issue = metadata.title.split(" #")
issue = re.findall(r'\d+', issue)[0]
self.release_name = f"{title.strip()} {issue.strip().zfill(3)} "
else:
self.release_name = metadata.title
"""
# TODO: get release year
if True:#not metadata.issue_date:
self.release_name += f"(xxxx) (digital) ({group_name})"
"""
# sanitize file name
self.release_name = re.sub(r"[\\/*?:\"'<>|]", "", self.release_name).strip()
print(f"{self.asin} : {self.release_name}")
content_folder = os.path.join(self.output_folder, self.release_name)
Path(content_folder).mkdir(exist_ok=True)
self.book.extract_to_folder(content_folder, f"{self.release_name} - p")
if not keep_temp:
shutil.rmtree(self.temp_folder)
if __name__ == "__main__":
parser = argparse.ArgumentParser(
prog="unkindle",
description="Download and de-drm kindle books",
epilog="https://github.com/athrowaway2021/comix",
)
parser.add_argument("-o", "--output", help="output folder")
parser.add_argument("--jpeg", help="output as jpeg", action="store_true", default=False)
parser.add_argument("--keep_temp", help="keep temp folder", action="store_true", default=False)
parser.add_argument("asin", help="asin of the book to download")
args = parser.parse_args()
# TODO: add subcommand to list available books for the account
# can be done via signed_request(https://todo-ta-g7g.amazon.com/FionaTodoListProxy/syncMetaData?&item_count=1000&item_types=EBOK)
kindle = Kindle(args.asin, hdv_png=not args.jpeg)
if kindle.get_book():
kindle.download(args.output, args.keep_temp)