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it-ebooks.py
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it-ebooks.py
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import re
import sys
import time
import cutil
import signal
import logging
from models import db_session, Setting, Book, NoResultFound
from scraper_monitor import scraper_monitor
from scraper_lib import Scraper, Web
# Create logger for this script
logger = logging.getLogger(__name__)
class Worker:
def __init__(self, web, book_id):
"""
Worker Profile
Run for each item that needs parsing
Each thread has a web instance that is used for parsing
"""
# `web` is what utilizes the profiles and proxying
self.web = web
self.book_id = str(book_id)
# Get the sites content as a beautifulsoup object
url = '{base_url}/book/{book_id}/'.format(base_url=self.web.scraper.BASE_URL,
book_id=self.book_id)
soup = self.web.get_site(url, page_format='html')
if soup is None:
logger.warning("Response was None for url {url}".format(url=url))
return
if soup.find('img', {'alt': 'Page Not Found'}):
logger.warning("Page Not Found: {url}".format(url=url))
return
logger.info("Getting book {book_id}".format(book_id=self.book_id))
data = self.parse_book(soup)
if data is not None:
# Add raw data to db
self.web.scraper.insert_data(data)
# Add success count to stats. Keeps track of how much ref data has been parsed
self.web.scraper.track_stat('ref_data_success_count', 1)
# Take it easy on the site
time.sleep(1)
def parse_book(self, content):
"""
:return: List of items with their details
"""
cover_source = content.find('img', {'itemprop': 'image'})['src'].strip()
try:
subtitle = content.find('h3').getText().strip()
except AttributeError:
subtitle = None
try:
file_source = content.find('a', {'href': re.compile('http://filepi.com')})['href']
except (AttributeError, TypeError):
file_source = None
parsed_data = {'book_id': self.book_id,
'file_location': None,
'file_cover_location': None,
'file_cover_source': self.web.scraper.BASE_URL + cover_source,
'description': content.find('span', {'itemprop': 'description'}).getText().strip(),
'file_source': file_source,
'format': content.find(attrs={'itemprop': 'bookFormat'}).getText().strip().lower(),
'isbn': content.find(attrs={'itemprop': 'isbn'}).getText().strip(),
'language': content.find(attrs={'itemprop': 'inLanguage'}).getText().strip(),
'pages': content.find(attrs={'itemprop': 'numberOfPages'}).getText().strip(),
'publisher': content.find(attrs={'itemprop': 'publisher'}).getText().strip(),
'title': content.find('h1', {'itemprop': 'name'}).getText().strip(),
'subtitle': subtitle,
'year': content.find(attrs={'itemprop': 'datePublished'}).getText().strip(),
'author': content.find(attrs={'itemprop': 'author'}).getText().strip(),
'time_collected': cutil.get_datetime(),
}
# Download book
base_filename = '{last_nums}/{book_id}/{book_id}'\
.format(last_nums=self.book_id[-2:], book_id=self.book_id)
book_filename = '{base_filename}_book.{ext}'.format(base_filename=base_filename,
ext=parsed_data.get('format'))
cover_ext = cutil.get_file_ext(parsed_data.get('file_cover_source'))
book_cover_filename = '{base_filename}_cover{ext}'.format(base_filename=base_filename,
ext=cover_ext)
parsed_data['file_cover_location'] = self.web.download(parsed_data.get('file_cover_source'),
book_cover_filename)
header = {'Referer': self.web.scraper.BASE_URL}
if parsed_data.get('file_source') is not None:
parsed_data['file_location'] = self.web.download(parsed_data.get('file_source'),
book_filename,
header=header)
return parsed_data
class ItEbooks(Scraper):
def __init__(self, config_file=None):
super().__init__('itebooks')
self.BASE_URL = 'http://it-ebooks.info'
self.book_ids = self.get_latest_books()
self.last_id_scraped = self.get_last_scraped()
def start(self):
"""
Send the ref data to the worker threads
"""
if len(self.book_ids) == 0:
logger.critical("No books found in the latest upload section")
return
if self.book_ids[-1] <= self.last_id_scraped:
# No need to continue
logger.info("Already have the newest book")
return
# Log how many items in total we will be parsing
scraper.stats['ref_data_count'] = len(self.book_ids)
# Only ever use 1 thread here
self.thread_profile(1, 'requests', self.book_ids, Worker)
def get_latest_books(self):
"""
Get the latest uploaded book id's and return as a list
"""
logger.info("Get latest upload ids")
tmp_web = Web(self, 'requests')
# Get the json data
try:
soup = tmp_web.get_site(self.BASE_URL, page_format='html')
except:
logger.critical("Problem loading home page to get latest uploads", exc_info=True)
sys.exit(1)
book_list_raw = soup.find_all("td", {"width": 120})
book_list = []
for book in book_list_raw:
try:
book_id_raw = book.find('a').get('href').split('/')[2]
book_list.append(int(book_id_raw))
except ValueError:
logger.error("Could not get book id from {book_id_raw}".format(book_id_raw=book_id_raw))
book_list.sort()
return book_list
def get_last_scraped(self):
"""
Get last book scraped
"""
last_scraped_id = db_session.query(Setting).filter(Setting.bit == 0).one().book_last_id
if last_scraped_id is None:
last_scraped_id = 0
return last_scraped_id
def log_last_scraped(self):
try:
try:
last_book_id = db_session.query(Book).order_by(Book.book_id.desc()).first()
if last_book_id is not None:
setting = db_session.query(Setting).filter(Setting.bit == 0).one()
setting.book_last_id = last_book_id.book_id
setting.book_last_ran = cutil.get_datetime()
db_session.add(setting)
db_session.commit()
except NoResultFound:
# If there is no raw data then no books were collected
pass
except:
logger.exception("Problem logging last book scraped")
def insert_data(self, data):
"""
Will handle inserting data into the database
"""
try:
# Check if book is in database, if so update else create
try:
book = db_session.query(Book).filter(Book.book_id == data.get('book_id')).one()
except NoResultFound:
book = Book()
book.title = data.get('title')
book.subtitle = data.get('subtitle')
book.author = data.get('author')
book.year = data.get('year')
book.pages = data.get('pages')
book.language = data.get('language')
book.publisher = data.get('publisher')
book.isbn = data.get('isbn')
book.format = data.get('format')
book.description = data.get('description')
book.file_source = data.get('file_source')
book.file_cover_source = data.get('file_cover_source')
book.file_location = data.get('file_location')
book.file_cover_location = data.get('file_cover_location')
book.book_id = data.get('book_id')
book.time_collected = data.get('time_collected')
db_session.add(book)
db_session.commit()
# self.track_stat('rows_added_to_db', rows_affected)
except Exception:
db_session.rollback()
logger.exception("Error adding to db {data}".format(data=data))
def sigint_handler(signal, frame):
logger.critical("Keyboard Interrupt")
sys.exit(0)
if __name__ == '__main__':
signal.signal(signal.SIGINT, sigint_handler)
try:
scraper = ItEbooks()
try:
scraper.start()
scraper.cleanup()
except Exception:
logger.critical("Main Error", exc_info=True)
except Exception:
logger.critical("Setup Error", exc_info=True)
finally:
scraper.log_last_scraped()
try:
# Log stats
scraper_monitor.stop(total_urls=scraper.stats['total_urls'],
ref_data_count=scraper.stats['ref_data_count'],
ref_data_success_count=scraper.stats['ref_data_success_count'],
rows_added_to_db=scraper.stats['rows_added_to_db'])
except NameError:
# If there is an issue with scraper.stats
scraper_monitor.stop()
except Exception:
logger.critical("Scraper Monitor Stop Error", exc_info=True)
scraper_monitor.stop()