236 lines
7.8 KiB
Python
236 lines
7.8 KiB
Python
# -*- coding: utf-8 -*-
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from time import time, sleep
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from urllib.parse import urlencode
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import re
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from functools import partial
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from ox.cache import get_json, store, read_url
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import ox.web.google
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import stdnum.isbn
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from lxml import etree
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from .utils import find_isbns, get_language, decode_html_data, to_isbn13
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import settings
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import logging
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logger = logging.getLogger(__name__)
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NAMESPACES = {
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'openSearch': 'http://a9.com/-/spec/opensearchrss/1.0/',
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'atom' : 'http://www.w3.org/2005/Atom',
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'dc' : 'http://purl.org/dc/terms',
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'gbs' : 'http://schemas.google.com/books/2008',
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'gd' : 'http://schemas.google.com/g/2005'
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}
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XPath = partial(etree.XPath, namespaces=NAMESPACES)
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def parse_entry(entry_):
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entry_id = XPath('descendant::atom:id')
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creator = XPath('descendant::dc:creator')
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date = XPath('descendant::dc:date')
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description = XPath('descendant::dc:description')
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_format = XPath('descendant::dc:format')
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identifier = XPath('descendant::dc:identifier')
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language = XPath('descendant::dc:language')
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publisher = XPath('descendant::dc:publisher')
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subject = XPath('descendant::dc:subject')
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title = XPath('descendant::dc:title')
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viewability = XPath('descendant::gbs:viewability')
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id_url = entry_id(entry_)[0].text
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_id = id_url.split('/')[-1]
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info = {}
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info['title'] = ': '.join([x.text for x in title(entry_)]).strip()
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authors = [x.text.strip() for x in creator(entry_) if x.text and x.text.strip()]
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if authors:
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info['author'] = authors
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info['description'] = '\n\n'.join([x.text for x in description(entry_)]).strip()
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info['date'] = ''.join([x.text for x in date(entry_)]).strip()
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info['categories'] = [x.text for x in subject(entry_)]
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info['publisher'] = [x.text for x in publisher(entry_)]
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info['language'] = [get_language(x.text) for x in language(entry_)]
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v = viewability(entry_)
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if v and v[0].attrib.get('value') != 'http://schemas.google.com/books/2008#view_no_pages':
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info['cover'] = 'https://books.google.com/books/content/images/frontcover/%s?fife=w600-rw' % _id
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format_ = ''.join([x.text for x in _format(entry_)])
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if format_:
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pages = re.compile('\d+').findall(format_)
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if pages:
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info['pages'] = int(pages[0])
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for x in identifier(entry_):
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t = str(x.text).strip()
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if t[:5].upper() == 'ISBN:':
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t = to_isbn13(t[5:])
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if t:
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info['isbn'] = t
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break
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info = decode_html_data(info)
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return info
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def find_feeds(title=None, author=None):
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'''
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parts = []
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if title:
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parts.append(' '.join(['intitle:%s' % p for p in title.split(' ')]))
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if author:
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parts.append(' '.join(['inauthor:%s' % p for p in author.split(' ')]))
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q = '+'.join(parts)
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'''
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q = ''
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if title:
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q += title + ' '
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if author:
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q += author
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url = 'http://books.google.com/books/feeds/volumes?' + urlencode({
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'q': q.strip(),
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'max-results': 20,
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'start-index': 1,
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'min-viewability': 'none',
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})
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data = read_url(url)
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feed = etree.fromstring(data, parser=etree.XMLParser(recover=True, no_network=True))
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results = []
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isbns = set()
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for entry_ in XPath('//atom:entry')(feed):
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entry = parse_entry(entry_)
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if 'isbn' in entry and 'isbn' not in isbns:
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results.append(info(entry['isbn']))
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isbns.add(info['isbn'])
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return results
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def find(title=None, author=None):
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q = ''
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if title:
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q += title + ' '
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if author:
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q += author
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url = 'https://www.googleapis.com/books/v1/volumes?q=%s' % q
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api_key = settings.server.get('google_api_key')
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if api_key:
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url += '&key=' + api_key
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if api_limit.error:
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raise IOError(url)
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while not api_limit.consume(1):
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logger.debug('hitting google api to fast, waiting 1 second')
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sleep(1)
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r = get_json(url, timeout=-1)
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if 'error' in r:
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logger.debug('got google api error, dont call for 10 minutes')
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store.delete(url)
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api_limit.error = True
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raise IOError(url, r)
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if 'items' not in r:
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logger.debug('unknown %s: %s [%s]', key, value, r)
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return []
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results = []
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for item in r['items']:
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results.append(parse_item(item))
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return results
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def info(value):
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key = 'isbn'
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url = 'https://www.googleapis.com/books/v1/volumes?q=%s:%s' % (key, value)
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api_key = settings.server.get('google_api_key')
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if api_key:
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url += '&key=' + api_key
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if api_limit.error:
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raise IOError(url)
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while not api_limit.consume(1):
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logger.debug('hitting google api to fast, waiting 1 second')
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sleep(1)
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r = get_json(url, timeout=-1)
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if 'error' in r:
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logger.debug('got google api error, dont call for 10 minutes')
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store.delete(url)
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api_limit.error = True
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raise IOError(url, r)
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if 'items' not in r:
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logger.debug('unknown %s: %s [%s]', key, value, r)
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return {}
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return parse_item(r['items'][0])
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def parse_item(item):
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_data = item['volumeInfo']
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_id = item['id']
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data = {}
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for key in [
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'authors',
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'categories',
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'description',
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'pageCount',
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'publishedDate',
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'publisher',
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'title',
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]:
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if key in _data:
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data[{
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'authors': 'author',
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'pageCount': 'pages',
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'publishedDate': 'date',
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}.get(key, key)] = _data[key]
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if 'subtitle' in _data and _data['subtitle'].strip():
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data['title'] = '{title}: {subtitle}'.format(**_data)
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if item['accessInfo']['viewability'] != 'NO_PAGES':
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#data['cover'] = 'https://books.google.com/books?id=%s&pg=PP1&img=1&zoom=0&hl=en' % _id
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data['cover'] = 'https://books.google.com/books/content/images/frontcover/%s?fife=w600-rw' % _id
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elif 'imageLinks' in _data:
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for size in ('extraLarge', 'large', 'medium', 'small', 'thumbnail', 'smallThumbnail'):
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if size in _data['imageLinks']:
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data['cover'] = _data['imageLinks'][size]
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break
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if 'industryIdentifiers' in _data:
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for k in _data['industryIdentifiers']:
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if k['type'].startswith('ISBN'):
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if 'isbn' not in data:
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data['isbn'] = []
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data['isbn'].append(k['identifier'])
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else:
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logger.debug('unknown identifier %s', k)
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if 'isbn' in data:
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data['isbn'] = [to_isbn13(i) for i in data['isbn']][0]
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if 'publisher' in data and isinstance(data['publisher'], str):
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data['publisher'] = [data['publisher']]
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if 'language' in _data:
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data['language'] = [get_language(_data['language'])]
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data = decode_html_data(data)
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return data
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class Limit(object):
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_error = False
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def __init__(self, fill_rate, capacity):
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self.timestamp = time()
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self.fill_rate = fill_rate
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self.capacity = capacity
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self._tokens = capacity
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def consume(self, tokens):
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if tokens <= self.tokens:
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self._tokens -= tokens
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else:
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return False
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return True
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def get_tokens(self):
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now = time()
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if self._tokens < self.capacity:
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delta = self.fill_rate * (now - self.timestamp)
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self._tokens = min(self.capacity, self._tokens + delta)
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self.timestamp = now
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return self._tokens
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tokens = property(get_tokens)
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def get_error(self):
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if self._error and self._error < (time() - 10*60):
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self._error = False
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return self._error != False
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def set_error(self, value):
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self._error = time()
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error = property(get_error, set_error)
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api_limit = Limit(fill_rate=0.5, capacity=25)
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