# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4
from time import time, sleep
from urllib.parse import urlencode
import re
from functools import partial
from ox.cache import get_json, store, read_url
import ox.web.google
import stdnum.isbn
from lxml import etree
from .utils import find_isbns, get_language, decode_html_data, to_isbn13
import settings
import logging
logger = logging.getLogger(__name__)
NAMESPACES = {
'openSearch':'http://a9.com/-/spec/opensearchrss/1.0/',
'atom' : 'http://www.w3.org/2005/Atom',
'dc' : 'http://purl.org/dc/terms',
'gbs' : 'http://schemas.google.com/books/2008',
'gd' : 'http://schemas.google.com/g/2005'
}
XPath = partial(etree.XPath, namespaces=NAMESPACES)
def find_(query):
logger.debug('find %s', query)
query += ' isbn'
isbns = []
for r in ox.web.google.find(query):
isbns += find_isbns(' '.join(r))
logger.debug('isbns', isbns)
results = []
done = set()
for isbn in isbns:
if isbn not in done:
r = {
'isbn': isbn,
'primaryid': ['isbn', isbn]
}
results.append(r)
done.add(isbn)
if len(isbn) == 10:
done.add(stdnum.isbn.to_isbn13(isbn))
if len(isbn) == 13 and isbn.startswith('978'):
done.add(stdnum.isbn.to_isbn10(isbn))
return results
def parse_entry(entry_):
entry_id = XPath('descendant::atom:id')
creator = XPath('descendant::dc:creator')
date = XPath('descendant::dc:date')
description = XPath('descendant::dc:description')
_format = XPath('descendant::dc:format')
identifier = XPath('descendant::dc:identifier')
language = XPath('descendant::dc:language')
publisher = XPath('descendant::dc:publisher')
subject = XPath('descendant::dc:subject')
title = XPath('descendant::dc:title')
viewability = XPath('descendant::gbs:viewability')
id_url = entry_id(entry_)[0].text
_id = id_url.split('/')[-1]
info = {}
info['title'] = ': '.join([x.text for x in title(entry_)]).strip()
authors = [x.text.strip() for x in creator(entry_) if x.text and x.text.strip()]
if authors:
info['author'] = authors
info['description'] = '\n\n'.join([x.text for x in description(entry_)]).strip()
info['date'] = ''.join([x.text for x in date(entry_)]).strip()
info['categories'] = [x.text for x in subject(entry_)]
info['publisher'] = [x.text for x in publisher(entry_)]
info['language'] = [get_language(x.text) for x in language(entry_)]
v = viewability(entry_)
if v and v[0].attrib.get('value') != 'http://schemas.google.com/books/2008#view_no_pages':
info['cover'] = 'https://books.google.com/books/content/images/frontcover/%s?fife=w600-rw' % _id
format_ = ''.join([x.text for x in _format(entry_)])
if format_:
pages = re.compile('\d+').findall(format_)
if pages:
info['pages'] = int(pages[0])
for x in identifier(entry_):
t = str(x.text).strip()
if t[:5].upper() == 'ISBN:':
t = to_isbn13(t[5:])
if t:
info['isbn'] = t
break
info = decode_html_data(info)
return info
def find(title=None, author=None):
'''
parts = []
if title:
parts.append(' '.join(['intitle:%s' % p for p in title.split(' ')]))
if author:
parts.append(' '.join(['inauthor:%s' % p for p in author.split(' ')]))
q = '+'.join(parts)
'''
q = ''
if title:
q += title + ' '
if author:
q += author
url = 'http://books.google.com/books/feeds/volumes?' + urlencode({
'q': q.strip(),
'max-results': 20,
'start-index':1,
'min-viewability':'none',
})
data = read_url(url)
feed = etree.fromstring(data,
parser=etree.XMLParser(recover=True, no_network=True))
results = []
isbns = set()
for entry_ in XPath('//atom:entry')(feed):
info = parse_entry(entry_)
if 'isbn' in info and not 'isbn' in isbns:
results.append(info)
isbns.add(info['isbn'])
return results
def info(isbn):
url = 'http://books.google.com/books/feeds/volumes?' + urlencode({
'q': 'isnb:' + isbn,
'max-results':1,
'start-index':1,
'min-viewability':'none',
})
data = read_url(url)
feed = etree.fromstring(data,
parser=etree.XMLParser(recover=True, no_network=True))
for entry_ in XPath('//atom:entry')(feed):
info = parse_entry(entry_)
info['isbn'] = isbn
return info
return {}
def info_newapi(value):
key = 'isbn'
url = 'https://www.googleapis.com/books/v1/volumes?q=%s:%s' % (key, value)
api_key = settings.server.get('google_api_key')
if api_key:
url += '&key=' + api_key
if api_limit.error:
raise IOError(url)
while not api_limit.consume(1):
logger.debug('hitting google api to fast, waiting 1 second')
sleep(1)
r = get_json(url, timeout=-1)
if 'error' in r:
logger.debug('got google api error, dont call for 10 minutes')
store.delete(url)
api_limit.error = True
raise IOError(url, r)
if not 'items' in r:
logger.debug('unknown %s: %s [%s]', key, value, r)
return {}
_data = r['items'][0]['volumeInfo']
_id = r['items'][0]['id']
data = {}
for key in [
'authors',
'categories',
'description',
'pageCount',
'publishedDate',
'publisher',
'title',
]:
if key in _data:
data[{
'authors': 'author',
'pageCount': 'pages',
'publishedDate': 'date',
}.get(key,key)] = _data[key]
if 'subtitle' in _data and _data['subtitle'].strip():
data['title'] = '{title}: {subtitle}'.format(**_data)
if r['items'][0]['accessInfo']['viewability'] != 'NO_PAGES':
#data['cover'] = 'https://books.google.com/books?id=%s&pg=PP1&img=1&zoom=0&hl=en' % _id
data['cover'] = 'https://books.google.com/books/content/images/frontcover/%s?fife=w600-rw' % _id
elif 'imageLinks' in _data:
for size in ('extraLarge', 'large', 'medium', 'small', 'thumbnail', 'smallThumbnail'):
if size in _data['imageLinks']:
data['cover'] = _data['imageLinks'][size]
break
if 'industryIdentifiers' in _data:
for k in _data['industryIdentifiers']:
if k['type'].startswith('ISBN'):
if not 'isbn' in data:
data['isbn'] = []
data['isbn'].append(k['identifier'])
else:
logger.debug('unknown identifier %s', k)
if 'isbn' in data:
data['isbn'] = [to_isbn13(i) for i in data['isbn']][0]
if 'publisher' in data and isinstance(data['publisher'], str):
data['publisher'] = [data['publisher']]
if 'language' in _data:
data['language'] = [get_language(_data['language'])]
data = decode_html_data(data)
return data
class Limit(object):
_error = False
def __init__(self, fill_rate, capacity):
self.timestamp = time()
self.fill_rate = fill_rate
self.capacity = capacity
self._tokens = capacity
def consume(self, tokens):
if tokens <= self.tokens:
self._tokens -= tokens
else:
return False
return True
def get_tokens(self):
now = time()
if self._tokens < self.capacity:
delta = self.fill_rate * (now - self.timestamp)
self._tokens = min(self.capacity, self._tokens + delta)
self.timestamp = now
return self._tokens
tokens = property(get_tokens)
def get_error(self):
if self._error and self._error < (time() - 10*60):
self._error = False
return self._error != False
def set_error(self, value):
self._error = time()
error = property(get_error, set_error)
api_limit = Limit(fill_rate=0.5, capacity=25)