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worker.py
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#!/usr/bin/env python
# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
from __future__ import (unicode_literals, division, absolute_import,
print_function)
__license__ = 'GPL v3'
__copyright__ = '2011, Grant Drake <[email protected]>; 2013, Bruce Chou <[email protected]>'
__docformat__ = 'restructuredtext en'
import socket, re, datetime
from collections import OrderedDict
from threading import Thread
from lxml.html import fromstring, tostring
from calibre.ebooks.metadata.book.base import Metadata
from calibre.library.comments import sanitize_comments_html
from calibre.utils.cleantext import clean_ascii_chars
from calibre.utils.localization import canonicalize_lang
def CSSSelect(expr):
from cssselect import HTMLTranslator
from lxml.etree import XPath
return XPath(HTMLTranslator().css_to_xpath(expr))
class Worker(Thread): # Get details {{{
'''
Get book details from amazons book page in a separate thread
'''
def __init__(self, url, result_queue, browser, log, relevance, plugin,
timeout=20, testing=False):
Thread.__init__(self)
self.daemon = True
self.testing = testing
self.url, self.result_queue = url, result_queue
self.log, self.timeout = log, timeout
self.relevance, self.plugin = relevance, plugin
self.browser = browser.clone_browser()
self.cover_url = self.amazon_id = self.isbn = None
from lxml.html import tostring
self.tostring = tostring
self.months = {
1: [u'1月'],
2: [u'2月'],
3: [u'3月'],
4: [u'4月'],
5: [u'5月'],
6: [u'6月'],
7: [u'7月'],
8: [u'8月'],
9: [u'9月'],
10: [u'10月'],
11: [u'11月'],
12: [u'12月'],
}
self.english_months = [None, 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
self.pd_xpath = '''
//h2[starts-with(text(), "基本信息")]/../div[@class="content"]
'''
self.publisher_xpath = '''
descendant::*[starts-with(text(), "出版社:")]
'''
self.publisher_names = {'出版社'}
self.language_xpath = '''
descendant::*[starts-with(text(), "语种：")]
'''
self.language_names = {'语种'}
self.tags_xpath = '''
descendant::h2[text() = "\t 查找其它相似商品"]/../descendant::ul/li
'''
self.ratings_pat = re.compile(r'(平均)([0-9.]+)( (星))')
lm = {
'eng': ('English', 'Englisch'),
'fra': ('French', 'Français'),
'ita': ('Italian', 'Italiano'),
'deu': ('German', 'Deutsch'),
'spa': ('Spanish', 'Espa\xf1ol', 'Espaniol'),
'jpn': ('Japanese', u'日本語'),
'por': ('Portuguese', 'Português'),
'chs': ('Chinese (Simplified)', u'简体中文'),
'cht': ('Chinese (Traditional)', u'繁体中文'),
}
self.lang_map = {}
for code, names in lm.iteritems():
for name in names:
self.lang_map[name] = code
self.series_pat = re.compile(
r'''
\|\s* # Prefix
(Series)\s*:\s* # Series declaration
(?P<series>.+?)\s+ # The series name
\((Book)\s* # Book declaration
(?P<index>[0-9.]+) # Series index
\s*\)
''', re.X)
def delocalize_datestr(self, raw):
if raw:
ans = raw
ans = ans.replace(u'年', ' ')
ans = ans.replace(u'日', '')
for i, vals in self.months.iteritems():
for x in vals:
ans = ans.replace(x, self.english_months[i]+' ')
return ans
def run(self):
try:
self.get_details()
except:
self.log.exception('get_details failed for url: %r'%self.url)
def get_details(self):
from calibre.utils.cleantext import clean_ascii_chars
from calibre.ebooks.chardet import xml_to_unicode
import html5lib
try:
raw = self.browser.open_novisit(self.url, timeout=self.timeout).read().strip()
except Exception as e:
if callable(getattr(e, 'getcode', None)) and \
e.getcode() == 404:
self.log.error('URL malformed: %r'%self.url)
return
attr = getattr(e, 'args', [None])
attr = attr if attr else [None]
if isinstance(attr[0], socket.timeout):
msg = 'Amazon timed out. Try again later.'
self.log.error(msg)
else:
msg = 'Failed to make details query: %r'%self.url
self.log.exception(msg)
return
oraw = raw
raw = xml_to_unicode(raw, strip_encoding_pats=True,
resolve_entities=True)[0]
if '<title>404 - ' in raw:
self.log.error('URL malformed: %r'%self.url)
return
try:
root = html5lib.parse(clean_ascii_chars(raw), treebuilder='lxml',
namespaceHTMLElements=False)
except:
msg = 'Failed to parse amazon details page: %r'%self.url
self.log.exception(msg)
return
errmsg = root.xpath('//*[@id="errorMessage"]')
if errmsg:
msg = 'Failed to parse amazon details page: %r'%self.url
msg += self.tostring(errmsg, method='text', encoding=unicode).strip()
self.log.error(msg)
return
self.parse_details(oraw, root)
def parse_details(self, raw, root):
try:
asin = self.parse_asin(root)
except:
self.log.exception('Error parsing asin for url: %r'%self.url)
asin = None
if self.testing:
import tempfile, uuid
with tempfile.NamedTemporaryFile(prefix=(asin or str(uuid.uuid4()))+ '_',
suffix='.html', delete=False) as f:
f.write(raw)
print ('Downloaded html for', asin, 'saved in', f.name)
try:
title = self.parse_title(root)
except:
self.log.exception('Error parsing title for url: %r'%self.url)
title = None
try:
authors = self.parse_authors(root)
except:
self.log.exception('Error parsing authors for url: %r'%self.url)
authors = []
if not title or not authors or not asin:
self.log.error('Could not find title/authors/asin for %r'%self.url)
self.log.error('ASIN: %r Title: %r Authors: %r'%(asin, title,
authors))
return
mi = Metadata(title, authors)
idtype = 'amazon_cn'
mi.set_identifier(idtype, asin)
self.amazon_id = asin
try:
mi.rating = self.parse_rating(root)
except:
self.log.exception('Error parsing ratings for url: %r'%self.url)
try:
mi.comments = self.parse_comments(root)
except:
self.log.exception('Error parsing comments for url: %r'%self.url)
try:
series, series_index = self.parse_series(root)
if series:
mi.series, mi.series_index = series, series_index
elif self.testing:
mi.series, mi.series_index = 'Dummy series for testing', 1
except:
self.log.exception('Error parsing series for url: %r'%self.url)
try:
mi.tags = self.parse_tags(root)
except:
self.log.exception('Error parsing tags for url: %r'%self.url)
try:
self.cover_url = self.parse_cover(root, raw)
except:
self.log.exception('Error parsing cover for url: %r'%self.url)
mi.has_cover = bool(self.cover_url)
non_hero = CSSSelect('div#bookDetails_container_div div#nonHeroSection')(root)
if non_hero:
# New style markup
try:
self.parse_new_details(root, mi, non_hero[0])
except:
self.log.exception('Failed to parse new-style book details section')
else:
pd = root.xpath(self.pd_xpath)
if pd:
pd = pd[0]
try:
isbn = self.parse_isbn(pd)
if isbn:
self.isbn = mi.isbn = isbn
except:
self.log.exception('Error parsing ISBN for url: %r'%self.url)
try:
mi.publisher = self.parse_publisher(pd)
except:
self.log.exception('Error parsing publisher for url: %r'%self.url)
try:
mi.pubdate = self.parse_pubdate(pd)
except:
self.log.exception('Error parsing publish date for url: %r'%self.url)
try:
lang = self.parse_language(pd)
if lang:
mi.language = lang
except:
self.log.exception('Error parsing language for url: %r'%self.url)
else:
self.log.warning('Failed to find product description for url: %r'%self.url)
mi.source_relevance = self.relevance
if self.amazon_id:
if self.isbn:
self.plugin.cache_isbn_to_identifier(self.isbn, self.amazon_id)
if self.cover_url:
self.plugin.cache_identifier_to_cover_url(self.amazon_id,
self.cover_url)
self.plugin.clean_downloaded_metadata(mi)
self.result_queue.put(mi)
def parse_asin(self, root):
link = root.xpath('//link[@rel="canonical" and @href]')
for l in link:
return l.get('href').rpartition('/')[-1]
def totext(self, elem):
return self.tostring(elem, encoding=unicode, method='text').strip()
def parse_title(self, root):
h1 = root.xpath('//h1[@id="title"]')
if h1:
h1 = h1[0]
for child in h1.xpath('./*[contains(@class, "a-color-secondary")]'):
h1.remove(child)
return self.totext(h1)
tdiv = root.xpath('//h1[contains(@class, "parseasinTitle")]')[0]
ttdiv = tdiv.xpath('descendant::*[@id="btAsinTitle"]')[0]
actual_title = ttdiv.xpath('descendant::*[@style="padding-left: 0"]')
if actual_title:
title = self.tostring(actual_title[0], encoding=unicode,
method='text').strip()
else:
title = self.tostring(tdiv, encoding=unicode, method='text').strip()
ans = re.sub(r'[(\[].*[)\]]', '', title).strip()
if not ans:
ans = title.rpartition('[')[0].strip()
return ans
def parse_authors(self, root):
matches = CSSSelect('#byline .author .contributorNameID')(root)
if not matches:
matches = CSSSelect('#byline .author a.a-link-normal')(root)
if matches:
authors = [self.totext(x) for x in matches]
return [a for a in authors if a]
x = '//h1[contains(@class, "parseasinTitle")]/following-sibling::span/*[(name()="a" and @href) or (name()="span" and @class="contributorNameTrigger")]'
aname = root.xpath(x)
if not aname:
aname = root.xpath('''
//h1[contains(@class, "parseasinTitle")]/following-sibling::*[(name()="a" and @href) or (name()="span" and @class="contributorNameTrigger")]
''')
for x in aname:
x.tail = ''
authors = [self.tostring(x, encoding=unicode, method='text').strip() for x
in aname]
authors = [a for a in authors if a]
return authors
def parse_rating(self, root):
rating_paths = ('//div[@data-feature-name="averageCustomerReviews"]',
'//div[@class="jumpBar"]/descendant::span[contains(@class,"asinReviewsSummary")]',
'//div[@class="buying"]/descendant::span[contains(@class,"asinReviewsSummary")]',
'//span[@class="crAvgStars"]/descendant::span[contains(@class,"asinReviewsSummary")]')
ratings = None
for p in rating_paths:
ratings = root.xpath(p)
if ratings:
break
if ratings:
for elem in ratings[0].xpath('descendant::*[@title]'):
t = elem.get('title').strip()
m = self.ratings_pat.match(t)
if m is not None:
return float(m.group(2))
def _render_comments(self, desc):
from calibre.library.comments import sanitize_comments_html
for c in desc.xpath('descendant::noscript'):
c.getparent().remove(c)
for c in desc.xpath('descendant::*[@class="seeAll" or'
' @class="emptyClear" or @id="collapsePS" or'
' @id="expandPS"]'):
c.getparent().remove(c)
for a in desc.xpath('descendant::a[@href]'):
del a.attrib['href']
a.tag = 'span'
desc = self.tostring(desc, method='html', encoding=unicode).strip()
# Encoding bug in Amazon data U+fffd (replacement char)
# in some examples it is present in place of '
desc = desc.replace('\ufffd', "'")
# remove all attributes from tags
desc = re.sub(r'<([a-zA-Z0-9]+)\s[^>]+>', r'<\1>', desc)
# Collapse whitespace
# desc = re.sub('\n+', '\n', desc)
# desc = re.sub(' +', ' ', desc)
# Remove the notice about text referring to out of print editions
desc = re.sub(r'(?s)<em>--This text ref.*?</em>', '', desc)
# Remove comments
desc = re.sub(r'(?s)<!--.*?-->', '', desc)
return sanitize_comments_html(desc)
def parse_comments(self, root):
ns = CSSSelect('#bookDescription_feature_div noscript')(root)
if ns:
ns = ns[0]
if len(ns) == 0 and ns.text:
import html5lib
# html5lib parsed noscript as CDATA
ns = html5lib.parseFragment('<div>%s</div>' % (ns.text), treebuilder='lxml', namespaceHTMLElements=False)[0]
else:
ns.tag = 'div'
return self._render_comments(ns)
ans = ''
desc = root.xpath('//div[@id="ps-content"]/div[@class="content"]')
if desc:
ans = self._render_comments(desc[0])
desc = root.xpath('//div[@id="productDescription"]/*[@class="content"]')
if desc:
ans += self._render_comments(desc[0])
return ans
def parse_series(self, root):
ans = (None, None)
desc = root.xpath('//div[@id="ps-content"]/div[@class="buying"]')
if desc:
raw = self.tostring(desc[0], method='text', encoding=unicode)
raw = re.sub(r'\s+', ' ', raw)
match = self.series_pat.search(raw)
if match is not None:
s, i = match.group('series'), float(match.group('index'))
if s:
ans = (s, i)
return ans
def parse_tags(self, root):
ans = []
exclude_tokens = {'kindle', 'a-z'}
exclude = {u'kindle电子书', 'by authors', 'authors & illustrators', 'books', 'new; used & rental textbooks'}
seen = set()
for li in root.xpath(self.tags_xpath):
for i, a in enumerate(li.iterdescendants('a')):
if i > 0:
# we ignore the first category since it is almost always too broad
raw = (a.text or '').strip().replace(',', ';')
lraw = icu_lower(raw)
tokens = frozenset(lraw.split())
if raw and lraw not in exclude and not tokens.intersection(exclude_tokens) and lraw not in seen:
ans.append(raw)
seen.add(lraw)
return ans
def parse_cover(self, root, raw=b""):
import urllib
imgs_url = 'http://z2-ec2.images-amazon.com/images/P/'+self.amazon_id+'.01.MAIN._SCRM_.jpg'
try:
res = urllib.urlopen(imgs_url)
code = res.getcode()
res.close()
except Exception,e:
code = 404
if code == 200:
return imgs_url
imgs = root.xpath('//img[(@id="prodImage" or @id="original-main-image" or @id="main-image") and @src]')
if not imgs:
imgs = root.xpath('//div[@class="main-image-inner-wrapper"]/img[@src]')
if not imgs:
imgs = root.xpath('//div[@id="main-image-container"]//img[@src]')
if imgs:
src = imgs[0].get('src')
if 'loading-' in src:
js_img = re.search(br'"largeImage":"(http://[^"]+)",',raw)
if js_img:
src = js_img.group(1).decode('utf-8')
if ('/no-image-avail' not in src and 'loading-' not in src and '/no-img-sm' not in src):
self.log('Found image: %s' % src)
parts = src.split('/')
if len(parts) > 3:
bn = parts[-1]
sparts = bn.split('_')
if len(sparts) > 2:
bn = re.sub(r'\.\.jpg$', '.jpg', (sparts[0] + sparts[-1]))
return ('/'.join(parts[:-1]))+'/'+bn
def parse_new_details(self, root, mi, non_hero):
table = non_hero.xpath('descendant::table')[0]
for tr in table.xpath('descendant::tr'):
cells = tr.xpath('descendant::td')
if len(cells) == 2:
name = self.totext(cells[0])
val = self.totext(cells[1])
if not val:
continue
if name in self.language_names:
ans = self.lang_map.get(val, None)
if not ans:
ans = canonicalize_lang(val)
if ans:
mi.language = ans
elif name in self.publisher_names:
pub = val.partition(';')[0].partition('(')[0].strip()
if pub:
mi.publisher = pub
date = val.rpartition('(')[-1].replace(')', '').strip()
try:
from calibre.utils.date import parse_only_date
date = self.delocalize_datestr(date)
mi.pubdate = parse_only_date(date, assume_utc=True)
except:
self.log.exception('Failed to parse pubdate: %s' % val)
elif name in {'ISBN', 'ISBN-10', 'ISBN-13'}:
ans = check_isbn(val)
if ans:
self.isbn = mi.isbn = ans
def parse_isbn(self, pd):
items = pd.xpath(
'descendant::*[starts-with(text(), "ISBN")]')
if not items:
items = pd.xpath(
'descendant::b[contains(text(), "ISBN:")]')
for x in reversed(items):
if x.tail:
ans = check_isbn(x.tail.strip())
if ans:
return ans
def parse_publisher(self, pd):
for x in reversed(pd.xpath(self.publisher_xpath)):
if x.tail:
ans = x.tail.partition(';')[0]
return ans.partition('(')[0].strip()
def parse_pubdate(self, pd):
for x in reversed(pd.xpath(self.publisher_xpath)):
if x.tail:
from calibre.utils.date import parse_only_date
ans = x.tail
date = ans.rpartition('(')[-1].replace(')', '').strip()
date = self.delocalize_datestr(date)
return parse_only_date(date, assume_utc=True)
def parse_language(self, pd):
for x in reversed(pd.xpath(self.language_xpath)):
if x.tail:
raw = x.tail.strip().partition(',')[0].strip()
ans = self.lang_map.get(raw, None)
if ans:
return ans
ans = canonicalize_lang(ans)
if ans:
return ans
# }}}