107 lines
3.8 KiB
Python
107 lines
3.8 KiB
Python
from ox.cache import read_url
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from ox import decode_html, strip_tags, find_re, fix_bad_unicode
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import json
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import re
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from urllib.parse import unquote
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import lxml.html
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import stdnum.isbn
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def info(key, value):
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if key not in ('isbn',):
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raise IOError('unknwon key %s' % key)
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if len(value) == 13:
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value = stdnum.isbn.to_isbn10(value)
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if len(value) != 10:
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raise IOError('invalid isbn %s' % value)
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url = 'http://www.amazon.com/dp/' + value
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data = read_url(url).decode()
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doc = lxml.html.document_fromstring(data)
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info = {}
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if '<title>404 - Document Not Found</title>' in data:
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return info
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if 'To discuss automated access to Amazon data please' in data:
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return info
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for l in doc.xpath('//link[@rel="canonical" and @href]'):
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info['asin'] = [l.get('href').rpartition('/')[-1]]
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break
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info['title'] = strip_tags(decode_html(doc.xpath('//span[@id="productTitle"]')[0].text))
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info['title'] = re.sub(' \([^\)]+? Classics\)', '', info['title'])
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info['title'] = re.sub(' \([^\)]+? Collection\)', '', info['title'])
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d = re.compile('encodedDescription\' : "(.*?)",').findall(data)
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if d:
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info['description'] = strip_tags(decode_html(unquote(d[0])))
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info['description'] = fix_bad_unicode(info['description'])
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else:
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info['description'] = ''
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content = doc.xpath('//div[@class="content"]')[0]
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content_info = {}
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for li in content.xpath('.//li'):
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v = li.text_content()
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if ': ' in v:
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k, v = li.text_content().split(': ', 1)
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content_info[k.strip()] = v.strip()
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if 'Language' in content_info:
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info['language'] = content_info['Language']
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if 'Publisher' in content_info:
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if ' (' in content_info['Publisher']:
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info['date'] = find_re(content_info['Publisher'].split(' (')[-1], '\d{4}')
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info['publisher'] = content_info['Publisher'].split(' (')[0]
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if '; ' in info['publisher']:
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info['publisher'], info['edition'] = info['publisher'].split('; ', 1)
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if 'ISBN-13' in content_info:
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info['isbn'] = content_info['ISBN-13'].replace('-', '')
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elif 'ISBN-10' in content_info:
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info['isbn'] = stdnum.isbn.to_isbn13(content_info['ISBN-10'])
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a = doc.xpath('//span[@class="a-size-medium"]')
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if a:
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for span in a:
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r = span.getchildren()[0].text.strip()
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role = get_role(r)
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if role not in info:
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info[role] = []
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info[role].append(span.text.strip())
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else:
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for span in doc.xpath('//span[@class="author notFaded"]'):
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author = [x.strip() for x in span.text_content().strip().split('\n') if x.strip()]
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role = get_role(author[-1])
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if role not in info:
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info[role] = []
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info[role].append(author[0])
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covers = re.compile('data-a-dynamic-image="({.+?})"').findall(data)[0]
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covers = json.loads(decode_html(covers))
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last = [0, 0]
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for url in covers:
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if covers[url] > last:
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last = covers[url]
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info['cover'] = re.sub('(\._SX.+?_\.)', '.', url)
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return info
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def get_price(asin, currency='EUR'):
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if currency == 'EUR':
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url = 'http://www.amazon.de/dp/' + asin
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else:
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url = 'http://www.amazon.com/dp/' + asin
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data = read_url(url).decode()
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doc = lxml.html.document_fromstring(data)
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for price in doc.xpath("//span[contains(@class, 'a-color-price')]"):
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price = price.text_content().strip()
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if currency == 'EUR':
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price = price.replace('EUR ', '').replace(',', '.')
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else:
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price = price.replace('$', '').strip()
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price = float(price)
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return price
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def get_role(value):
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if 'Translator' in value:
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role = 'translator'
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elif 'Editor' in value:
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role = 'editor'
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else:
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role = 'author'
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return role
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