def __init__(self, response):
mde = MicrodataExtractor()
try:
self.data = mde.extract(response.body, response.url)
except:
self.data = mde.extract(response.body.decode('latin-1'),
response.url)
def test_w3c_5_2(self):
body = get_testdata('w3c', 'microdata.5.2.html')
expected = json.loads(get_testdata('w3c', 'microdata.5.2.flat.json').decode('UTF-8'))
mde = MicrodataExtractor(nested=False, strict=True)
data = mde.extract(body)
self.assertDictEqual(data, expected)
def test_w3c_5_2(self):
body = get_testdata('w3c', 'microdata.5.2.html')
expected = json.loads(get_testdata('w3c', 'microdata.5.2.withtext.json').decode('UTF-8'))
mde = MicrodataExtractor(add_text_content=True)
data = mde.extract(body)
self.assertDictEqual(data, expected)
def test_w3c_5_5(self):
body = get_testdata("w3c", "microdata.5.5.html")
expected = json.loads(get_testdata("w3c", "microdata.5.5.json").decode("UTF-8"))
mde = MicrodataExtractor(strict=True)
data = mde.extract(body)
self.assertDictEqual(data, expected)
def parse_listing(self, response):
mde = MicrodataExtractor()
data = mde.extract(response.body)['items']
if data:
it = {}
it['shop'] = data[0]['properties']
prod = data[1]['properties']
it.update(prod['offerDetails']['properties'])
it['name'] = prod['name']
it['url'] = response.url
it['properties'] = [x for x in response.css('#item-overview .properties li::text').extract() \
if all(y not in x.lower() for y in ['materials','feedback', 'favorited', 'ships'])]
it['materials'] = e0(response.css('#overview-materials::text'))
it['origin'] = e0(response.css('.origin::text'))
it['imgs'] = response.css(
'#image-carousel img::attr("src")').extract()
it['description'] = e0(response.css("#description-text"))
it['tags'] = response.css('#listing-tag-list li a::text').extract()
it['fineprints'] = [
x.strip()
for x in response.css('#fineprint li::text').extract()[:4]
]
it['rating'] = response.css(
'.review-rating meta::attr("content")').extract()
#it['html'] = response.body
yield it
def parse(self, response):
for beacon_page in response:
mde = MicrodataExtractor()
beacon_data=mde.extract(html_content)
yield{
beacon_data
}
def parse(self, response):
mde = MicrodataExtractor()
data = mde.extract(response.body)
for item in data:
if item['type'] in self.target_types:
record = {'indexed_date': datetime.date.today().isoformat(), 'url': response.url, 'body': item}
yield record
def test_w3c_7_1(self):
body = get_testdata('w3c', 'microdata.7.1.html')
expected = json.loads(get_testdata('w3c', 'microdata.7.1.json').decode('UTF-8'))
mde = MicrodataExtractor(strict=True)
data = mde.extract(body, 'http://blog.example.com/progress-report')
self.assertDictEqual(data, expected)
def test_w3c_object_element(self):
body = get_testdata('w3c', 'microdata.object.html')
expected = json.loads(get_testdata('w3c', 'microdata.object.json').decode('UTF-8'))
mde = MicrodataExtractor(strict=True)
data = mde.extract(body, 'http://www.example.com/microdata/test')
self.assertDictEqual(data, expected)
def test_w3c_data_element(self):
body = get_testdata('w3c', 'microdata.4.2.data.html')
expected = json.loads(get_testdata('w3c', 'microdata.4.2.data.json').decode('UTF-8'))
mde = MicrodataExtractor(strict=True)
data = mde.extract(body)
self.assertDictEqual(data, expected)
def test_w3c_7_1(self):
body = get_testdata("w3c", "microdata.7.1.html")
expected = json.loads(get_testdata("w3c", "microdata.7.1.json").decode("UTF-8"))
mde = MicrodataExtractor(strict=True)
data = mde.extract(body, "http://blog.example.com/progress-report")
self.assertDictEqual(data, expected)
def test_w3c_5_2(self):
body = get_testdata('w3c', 'microdata.5.2.html')
expected = json.loads(
get_testdata('w3c', 'microdata.5.2.withtext.json').decode('UTF-8'))
mde = MicrodataExtractor(add_text_content=True)
data = mde.extract(body)
self.assertEqual(data, expected)
def get_microdata_extruct_items(htmltext):
mde = MicrodataExtractor()
try:
items = mde.extract(htmltext)
except XMLSyntaxError:
return # Nothing to do here
return items
def test_join_none(self):
body = get_testdata('schema.org', 'product-ref.html')
expected = json.loads(
get_testdata('schema.org', 'product-ref.json').decode('UTF-8'))
mde = MicrodataExtractor()
data = mde.extract(body)
self.assertEqual(data, expected)
def test_w3c_textContent_values(self):
body = get_testdata('w3c', 'microdata.4.2.strings.html')
expected = json.loads(
get_testdata('w3c', 'microdata.4.2.strings.json').decode('UTF-8'))
mde = MicrodataExtractor(strict=True)
data = mde.extract(body)
self.assertEqual(data, expected)
def test_w3c_5_5(self):
body = get_testdata('w3c', 'microdata.5.5.html')
expected = json.loads(
get_testdata('w3c', 'microdata.5.5.json').decode('UTF-8'))
mde = MicrodataExtractor(strict=True)
data = mde.extract(body)
self.assertEqual(data, expected)
def test_w3c_meter_element(self):
body = get_testdata('w3c', 'microdata.4.2.meter.html')
expected = json.loads(
get_testdata('w3c', 'microdata.4.2.meter.json').decode('UTF-8'))
mde = MicrodataExtractor(strict=True)
data = mde.extract(body)
self.assertDictEqual(data, expected)
def test_w3c_object_element(self):
body = get_testdata('w3c', 'microdata.object.html')
expected = json.loads(
get_testdata('w3c', 'microdata.object.json').decode('UTF-8'))
mde = MicrodataExtractor(strict=True)
data = mde.extract(body, 'http://www.example.com/microdata/test')
self.assertEqual(data, expected)
def test_w3c_7_1(self):
body = get_testdata('w3c', 'microdata.7.1.html')
expected = json.loads(
get_testdata('w3c', 'microdata.7.1.flat.json').decode('UTF-8'))
mde = MicrodataExtractor(nested=False, strict=True)
data = mde.extract(body, 'http://blog.example.com/progress-report')
self.assertEqual(data, expected)
def test_schemaorg_MusicRecording(self):
for i in [1]:
body = get_testdata('schema.org', 'MusicRecording.{:03d}.html'.format(i))
expected = json.loads(get_testdata('schema.org', 'MusicRecording.{:03d}.json'.format(i)).decode('UTF-8'))
mde = MicrodataExtractor()
data = mde.extract(body)
self.assertDictEqual(data, expected)
def test_schemaorg_Event(self):
for i in [1, 2, 3, 4, 8]:
body = get_testdata("schema.org", "Event.{:03d}.html".format(i))
expected = json.loads(get_testdata("schema.org", "Event.{:03d}.json".format(i)).decode("UTF-8"))
mde = MicrodataExtractor()
data = mde.extract(body)
self.assertDictEqual(data, expected)
def parse_product(self, response):
mde = MicrodataExtractor()
data = mde.extract(response.body)
product_data = data['items'][1]['properties']
extra_data = {}
for l in response.body.split('\n'):
if 'vgoogle_ecommProd' in l:
line_data = l.strip()
key = line_data.split(':')[0].strip().replace(
'vgoogle_ecommProd', '')
value = line_data.split(':')[1][3:-3]
if key not in extra_data:
extra_data[key] = value
loader = ProductLoader(item=Product(), response=response)
loader.add_value('identifier',
product_data.get('sku', extra_data['ID']))
loader.add_value('sku', product_data.get('sku', extra_data['ID']))
loader.add_value('name', product_data.get('name', extra_data['Name']))
loader.add_value('url', response.url)
if 'price' in product_data:
loader.add_value('price', product_data['price'])
elif 'Price' in extra_data:
loader.add_value('price', extra_data['Price'])
else:
price = response.xpath('//*[(contains(@class, "product-item") and '
'contains(@class, "product-price")) or @id="price-amount"]//text()')\
.re(r'[\d\.,]+')
loader.add_value('price', price)
try:
loader.add_value(
'category', data['items'][0]['properties']['itemListElement']
[1]['properties']['name'])
except:
loader.add_value('category', extra_data['Cat'])
loader.add_value('brand',
product_data.get('manufacturer', extra_data['Brand']))
try:
loader.add_value(
'image_url',
response.urljoin(
response.xpath(
'//div[@id="prod-img-placehold"]/img/@srcset').re(
r'(.*\.jpg)')[0].split(',')[-1].strip()))
except:
pass
item = loader.load_item()
metadata = SpecSaversMeta()
promotional_data = response.xpath(
'//div[@class="arrow-container"]/div/text()').extract()
metadata['promotion'] = promotional_data[0].strip(
) if promotional_data else ''
item['metadata'] = metadata
yield item
def test_join_custom_url(self):
body = get_testdata('schema.org', 'product.html')
expected = json.loads(
get_testdata('schema.org',
'product_custom_url.json').decode('UTF-8'))
mde = MicrodataExtractor()
data = mde.extract(body, base_url='http://some-example.com')
self.assertEqual(data, expected)
def parse(self, response):
extractor = MicrodataExtractor()
items = extractor.extract(response.text, response.url)['items']
for it in items:
yield it['properties']
next_page_url = response.css("li.next > a::attr(href)").extract_first()
if next_page_url is not None:
yield scrapy.Request(response.urljoin(next_page_url))
def parse(self, response):
extractor = MicrodataExtractor()
properties = extractor.extract(response.body_as_unicode()).get('items')[0].get('properties', {})
item = response.meta.get('item', {})
item['url'] = response.url
item['title'] = properties.get('name').replace('Details about', '').strip()
item['price'] = float(
properties.get('offers', {}).get('properties', {}).get('price', 0)
)
yield item
def test_if_punctuations_in_description_are_correctly_formatted(self):
body = get_testdata('websites', 'microdata-with-description.html')
expected = json.loads(
get_testdata('websites',
'microdata-with-description.json').decode('UTF-8'))
mde = MicrodataExtractor()
data = mde.extract(body)
self.assertEqual(data, expected)
def test_schemaorg_Event(self):
for i in [1, 2, 3, 4, 8]:
body = get_testdata('schema.org', 'Event.{:03d}.html'.format(i))
expected = json.loads(
get_testdata('schema.org',
'Event.{:03d}.json'.format(i)).decode('UTF-8'))
mde = MicrodataExtractor()
data = mde.extract(body)
self.assertEqual(data, expected)
def parse_item(self, response):
"""Parse the recipe to get title and ingredients."""
schema_type = "mde"
mde = MicrodataExtractor()
data = mde.extract(response.body)
# print('response.body:', response.body)
# print('data:', data)
if len(data) == 0:
jslde = JsonLdExtractor()
data = jslde.extract(response.body)
schema_type = "jsonld"
if schema_type == "mde":
recipe = data[0]['properties']
# recipe_output_item = RecipeItem()
# recipe_output_item['recipe_name'] = recipe['name']
# recipe_output_item['ingredients'] = [
# ingredient for ingredient in recipe['ingredients']
# if ingredient not in ['', 'Add all ingredients to list']
# ]
# recipe_output_item['tags'] = [tag['properties']['title']
# for tag in data['items'][1:]]
# try:
# recipe_output_item['description'] = recipe['description']
# except KeyError:
# recipe_output_item['description'] = None
# recipe_output_item['url'] = recipe['url']
elif schema_type == "jsonld":
recipe = data['items'][0]
# recipe_output_item = RecipeItem()
# recipe_output_item['recipe_name'] = recipe['name']
# recipe_output_item['ingredients'] = recipe['ingredients']
# recipe_output_item['tags'] = [tag['properties']['title']
# for tag in data['items'][1:]]
# try:
# recipe_output_item['description'] = recipe['description']
# except KeyError:
# recipe_output_item['description'] = None
# recipe_output_item['url'] = recipe['url']
properties = [
'totalTime', 'nutrition', 'name', 'author', 'url', 'image',
'recipeIngredient', 'aggregateRating', 'recipeYield',
'recipeInstructions', 'video', 'mainEntityOfPage', 'cookTime',
'recipeCategory', 'review', 'prepTime', 'description'
]
recipe_output_item = RecipeItem()
for prop in properties:
try:
recipe_output_item[prop] = recipe[prop]
except KeyError:
recipe_output_item[prop] = None
yield recipe_output_item
def test_schemaorg_LocalBusiness(self):
for i in [2, 3]:
body = get_testdata('schema.org',
'LocalBusiness.{:03d}.html'.format(i))
expected = json.loads(
get_testdata(
'schema.org',
'LocalBusiness.{:03d}.json'.format(i)).decode('UTF-8'))
mde = MicrodataExtractor()
data = mde.extract(body)
self.assertEqual(data, expected)
def test_schemaorg_MusicRecording(self):
for i in [1]:
body = get_testdata('schema.org',
'MusicRecording.{:03d}.html'.format(i))
expected = json.loads(
get_testdata(
'schema.org',
'MusicRecording.{:03d}.json'.format(i)).decode('UTF-8'))
mde = MicrodataExtractor()
data = mde.extract(body)
self.assertDictEqual(data, expected)
def parse(self, response):
mde = MicrodataExtractor()
data = mde.extract(response.body)
for item in data['items']:
if item['type'] in self.target_types:
item['indexed_date'] = datetime.date.today().isoformat()
item['url'] = response.url
yield item
for url in response.xpath('//a/@href').extract():
if '/events' in url:
yield scrapy.Request(response.urljoin(url),
callback=self.parse)
def extract(self, html_text: str,
extract_title: bool = False,
extract_meta: bool = False,
extract_microdata: bool = False,
microdata_base_url: str = "",
extract_json_ld: bool = False,
extract_rdfa: bool = False,
rdfa_base_url: str = "") \
-> List[Extraction]:
"""
Args:
html_text (str): input html string to be extracted
extract_title (bool): True if string of 'title' tag needs to be extracted, return as { "title": "..." }
extract_meta (bool): True if string of 'meta' tags needs to be extracted, return as { "meta": { "author": "...", ...}}
extract_microdata (bool): True if microdata needs to be extracted, returns as { "microdata": [...] }
microdata_base_url (str): base namespace url for microdata, empty string if no base url is specified
extract_json_ld (bool): True if json-ld needs to be extracted, return as { "json-ld": [...] }
extract_rdfa (bool): True if rdfs needs to be extracted, returns as { "rdfa": [...] }
rdfa_base_url (str): base namespace url for rdfa, empty string if no base url is specified
Returns:
List[Extraction]: the list of extraction or the empty list if there are no matches.
"""
res = list()
soup = BeautifulSoup(html_text, 'html.parser')
if soup.title and extract_title:
title = self._wrap_data("title", soup.title.string.encode('utf-8').decode('utf-8'))
res.append(title)
if soup.title and extract_meta:
meta_content = self._wrap_meta_content(soup.find_all("meta"))
meta_data = self._wrap_data("meta", meta_content)
res.append(meta_data)
if extract_microdata:
mde = MicrodataExtractor()
mde_data = self._wrap_data("microdata", mde.extract(html_text, microdata_base_url))
res.append(mde_data)
if extract_json_ld:
jslde = JsonLdExtractor()
jslde_data = self._wrap_data("json-ld", jslde.extract(html_text))
res.append(jslde_data)
if extract_rdfa:
rdfae = RDFaExtractor()
rdfae_data = self._wrap_data("rdfa", rdfae.extract(html_text, rdfa_base_url))
res.append(rdfae_data)
return res
def parse_product(self, response):
mde = MicrodataExtractor()
try:
micro_data = mde.extract(response.body)['items']
gen_data = filter(lambda a: a['type'] == 'http://schema.org/Product',
micro_data)[0]['properties']
categories = [c['properties']['title']
for c in filter(lambda d: d['type'] == 'http://data-vocabulary.org/Breadcrumb',
micro_data)][1:]
except:
self.log('WARNING => Wrong product page in %s' % response.url)
return
main_name = gen_data['name']
if isinstance(main_name, list):
main_name = main_name[0]
main_brand = gen_data.get('brand', '')
if isinstance(main_brand, list):
main_brand = main_brand[0]
variants = response.xpath('//input[@name="ctl00$cphMain$ctl00$hidProductVariants"]/@value').extract()
if variants:
data = json.loads(self.html_parser.unescape(variants[0]))
for d in data:
for var in d['Variants']:
for size_data in var['Variants']:
color_name = size_data.get('Article', dict()).get('ColorName', '')
size_data = size_data['Article']
url = self.product_url % size_data
identifier = size_data['ItemOfferId']
name = main_name + ', ' + color_name + ', ' + size_data['FriendlySize']
price = size_data['WebInfo']['ArticlePriceDisplay']['FormattedSalePriceAfterWithCharges']
shipping_cost = size_data['FormattedDeliveryFee']
loader = ProductLoader(item=Product(), response=response)
loader.add_value('name', name)
loader.add_value('url', url)
loader.add_value('identifier', identifier)
loader.add_value('sku', size_data['ProductId'])
loader.add_value('price', extract_price_eu(price))
if shipping_cost:
loader.add_value('shipping_cost', extract_price_eu(shipping_cost))
loader.add_value('image_url', gen_data['image'][-1])
if size_data['AvailabilityCode'] != 'L':
loader.add_value('stock', 0)
loader.add_value('category', categories)
if main_brand:
loader.add_value('brand', main_brand)
yield loader.load_item()
else:
self.log('WARNING: Variants not found in => %s' % response.url)
def parse_item(self, response):
"""Parse the recipe to get title and ingredients."""
schema_type = "mde"
mde = MicrodataExtractor()
data = mde.extract(response.body)
if len(data['items']) == 0:
jslde = JsonLdExtractor()
data = jslde.extract(response.body)
schema_type = "jsonld"
if schema_type == "mde":
recipe = data['items'][2]['properties']
recipe_output_item = RecipeItem()
recipe_output_item['recipe_name'] = recipe['name']
recipe_output_item['ingredients'] = [
ingredient for ingredient in recipe['ingredients']
if ingredient not in ['', 'Add all ingredients to list']
]
recipe_tags = recipe['recipeCategory']
if 'recipeCuisine' in recipe.keys():
recipe_tags.append(recipe['recipeCuisine'])
recipe_output_item['tags'] = recipe_tags
try:
recipe_output_item['description'] = recipe['description']
except KeyError:
recipe_output_item['description'] = None
recipe_output_item['url'] = recipe['url']
elif schema_type == "jsonld":
recipe = data['items'][0]
recipe_output_item = RecipeItem()
recipe_output_item['recipe_name'] = recipe['name']
recipe_output_item['ingredients'] = recipe['ingredients']
recipe_output_item['tags'] = [
tag['properties']['title'] for tag in data['items'][1:]
]
try:
recipe_output_item['description'] = recipe['description']
except KeyError:
recipe_output_item['description'] = None
recipe_output_item['url'] = recipe['url']
yield recipe_output_item
def parse_item(self, response):
"""Parse the recipe to get title and ingredients."""
schema_type = "mde"
mde = MicrodataExtractor()
data = mde.extract(response.body)
if len(data['items']) == 0:
jslde = JsonLdExtractor()
data = jslde.extract(response.body)
schema_type = "jsonld"
if schema_type == "mde":
recipe = data['items'][2]['properties']
recipe_output_item = RecipeItem()
recipe_output_item['recipe_name'] = recipe['name']
recipe_output_item['ingredients'] = [
ingredient for ingredient in recipe['ingredients']
if ingredient not in ['', 'Add all ingredients to list']
]
recipe_tags = recipe['recipeCategory']
if 'recipeCuisine' in recipe.keys():
recipe_tags.append(recipe['recipeCuisine'])
recipe_output_item['tags'] = recipe_tags
try:
recipe_output_item['description'] = recipe['description']
except KeyError:
recipe_output_item['description'] = None
recipe_output_item['url'] = recipe['url']
elif schema_type == "jsonld":
recipe = data['items'][0]
recipe_output_item = RecipeItem()
recipe_output_item['recipe_name'] = recipe['name']
recipe_output_item['ingredients'] = recipe['ingredients']
recipe_output_item['tags'] = [tag['properties']['title']
for tag in data['items'][1:]]
try:
recipe_output_item['description'] = recipe['description']
except KeyError:
recipe_output_item['description'] = None
recipe_output_item['url'] = recipe['url']
yield recipe_output_item
def parse_listing(self, response):
mde = MicrodataExtractor()
data = mde.extract(response.body)['items']
if data:
it = {}
it['shop'] = data[0]['properties']
prod = data[1]['properties']
it.update(prod['offerDetails']['properties'])
it['name'] = prod['name']
it['url'] = response.url
it['properties'] = [x for x in response.css('#item-overview .properties li::text').extract() \
if all(y not in x.lower() for y in ['materials','feedback', 'favorited', 'ships'])]
it['materials'] = e0(response.css('#overview-materials::text'))
it['origin'] = e0(response.css('.origin::text'))
it['imgs'] = response.css('#image-carousel img::attr("src")').extract()
it['description'] = e0(response.css("#description-text"))
it['tags'] = response.css('#listing-tag-list li a::text').extract()
it['fineprints'] = [x.strip() for x in response.css('#fineprint li::text').extract()[:4]]
it['rating'] = response.css('.review-rating meta::attr("content")').extract()
#it['html'] = response.body
yield it
def extract(self, html_text: str,
extract_title: bool = False,
extract_meta: bool = False,
extract_microdata: bool = False,
extract_json_ld: bool = False,
extract_rdfa: bool = False) \
-> List[Extraction]:
res = list()
soup = BeautifulSoup(html_text, 'html.parser')
if soup.title and extract_title:
title = self.wrap_data(
"title",
soup.title.string.encode('utf-8').decode('utf-8'))
res.append(title)
if soup.title and extract_meta:
meta_content = self.wrap_meta_content(soup.find_all("meta"))
meta_data = self.wrap_data("meta", meta_content)
res.append(meta_data)
if extract_microdata:
mde = MicrodataExtractor()
mde_data = self.wrap_data("microdata", mde.extract(html_text))
res.append(mde_data)
if extract_json_ld:
jslde = JsonLdExtractor()
jslde_data = self.wrap_data("json-ld", jslde.extract(html_text))
res.append(jslde_data)
if extract_rdfa:
rdfae = RDFaExtractor()
rdfae_data = self.wrap_data("rdfa", rdfae.extract(html_text))
res.append(rdfae_data)
return res
def parse(self, response): selector = Selector(response=response) extractor = MicrodataExtractor() items = extractor.extract(response.body_as_unicode(), response.url) print items
def parse_products(self, response):
mde = MicrodataExtractor()
data = mde.extract(response.body)
category = response.meta['category']
selectors = response.xpath('//div[contains(@id, "Products_")]')
products = filter(lambda d: d['type'] == 'http://schema.org/Product',
data['items'])
for product_data, product_xs in zip(products, selectors):
properties = product_data['properties']
try:
offer = properties['offers']['properties']
except:
self.log('Offers are not found for %s => %s' %
(properties['name'], response.url))
continue
brand = product_xs.xpath(
'.//div[@class="Image"]//img[contains(@alt, "View more ")]/@alt'
).re(r'View more (.*) products')
product_url = product_xs.xpath(
'.//div[@class="Info"]//h2/a[contains(@href, "/products/")]/@href'
).extract()
if not product_url:
self.log('Not product url in => %s' % response.url)
continue
loader = ProductLoader(item=Product(), response=response)
loader.add_value('identifier', properties['mpn'])
loader.add_value('url', response.urljoin(product_url[0]))
loader.add_value('name', properties['name'])
loader.add_value(
'price',
round(
Decimal(offer['price'].replace(',', '')) / Decimal('1.2'),
2))
loader.add_value('sku', properties['mpn'])
loader.add_value('category', category)
loader.add_value(
'image_url',
urljoin_rfc('http://www.broadbandbuyer.com/images/products/',
properties['image']))
if brand:
loader.add_value('brand', brand[0])
loader.add_value('shipping_cost', '13')
in_stock = (offer['availability'] == 'http://schema.org/InStock')
if not in_stock:
loader.add_value('stock', 0)
else:
stock_no = product_xs.xpath(
'.//div[@class="Info"]//span[@class="Stock3"]/text()').re(
r'(\d+)')
if stock_no:
loader.add_value('stock', stock_no[0])
item = loader.load_item()
self.yield_item(item)
page_urls = set(
response.xpath(
'//div[@class="pages"]/a[not(contains(@class, "active"))'
' and contains(@href, "page=")]/@href').extract())
for url in page_urls:
yield Request(response.urljoin(url),
callback=self.parse_products,
meta={
'cookiejar': response.meta['cookiejar'],
'category': response.meta['category']
})
def get_review_items_from_microdata(spider,
review_type,
response,
product,
reviews_xpath=None,
pros_xpath=None,
cons_xpath=None):
'''
Get all reviews from a page, useful for user review pages with microdata
:param spider: the spider we use to scrape the site
:param review_type: type of the reviews to scrape, should be either USER or PRO
:param response: an instance of Scrapy's Response object where reviews will be scraped from
:param product: the product item the reviews are written for
:param reviews_xpath: the xpath to extract review selectors from 'response'
:param pros_xpath: the xpath to extract pros from review selectors
:param cons_xpath: the xpath to extract cons from review selectors
:return: list of all review items extracted
'''
mde = MicrodataExtractor()
try:
items = mde.extract(response.text)
except XMLSyntaxError:
return [] # Nothing to do here...
all_review_extracts = [
i for i in items if i['type'] == "http://schema.org/Review"
]
all_pros = []
all_cons = []
if reviews_xpath:
add_pros_and_cons = True
all_reviews = response.xpath(reviews_xpath)
for single_review in all_reviews:
if pros_xpath:
pros = spider.extract_all(single_review.xpath(pros_xpath),
separator=' ; ')
else:
pros = ''
if cons_xpath:
cons = spider.extract_all(single_review.xpath(cons_xpath),
separator=' ; ')
else:
cons = ''
all_pros.append(pros)
all_cons.append(cons)
if len(all_pros) != len(all_review_extracts) or len(all_cons) != len(
all_review_extracts):
spider.logger.warning(
"Number of reviews extracted from xpath is different from number of review microdata."
)
add_pros_and_cons = False
else:
add_pros_and_cons = False
review_items = []
for index, item in enumerate(all_review_extracts):
if add_pros_and_cons:
review = review_microdata_extruct(item,
product=product,
tp=review_type,
pros=all_pros[index],
cons=all_cons[index])
else:
review = review_microdata_extruct(item,
product=product,
tp=review_type)
review_items.append(review)
return review_items
class RISJMetadataExtractor(object):
"""An extruct-based metadata extractor"""
# TODO: Extend to microdata and RDFa, replacing bespoke xpath code. Then
# test on body of crawlers!
def __init__(self, response, microdata=False, jsonld=False, rdfa=False):
self.response = response
self.microdata = microdata
self.jsonld = jsonld
self.rdfa = rdfa
if rdfa:
try:
self.rdfae = RDFaExtractor()
self.rdfadata = self.rdfae.extract(self.response.text,
url=self.response.url)
except JSONDecodeError:
pass
if microdata:
try:
self.mde = MicrodataExtractor()
self.mdedata = self.mde.extract(self.response.text)
except JSONDecodeError:
pass
if jsonld:
try:
self.jlde = JsonLdExtractor()
self.jldata = self.jlde.extract(self.response.text)
except (JSONDecodeError, TypeError):
self.jldata = []
finally:
# Sometimes we get this in the meta dict from RISJExtractJSONLD
self.jldata.extend(self.response.meta.get('json-ld', []))
def extract_newsarticle_schemaorg(self,
microdata=None,
jsonld=None,
rdfa=None):
"""Extract schema.org NewsArticle metadata, encoded using any
supported metadata format. Note that we only try to extract the
*first* block of NewsArticle data for each method (which is then
combined with the first extracted from other methods if more than
one is selected."""
if microdata is None:
microdata = self.microdata
if jsonld is None:
jsonld = self.jsonld
if rdfa is None:
rdfa = self.rdfa
outd = {}
if jsonld:
for d in self.jldata:
# logger.debug('Analysing JSON-LD data: '+pformat(d))
try:
if (re.match(r'https?://schema.org/?', d['@context'])
and d['@type'] == 'NewsArticle'):
outd.update(d)
except (KeyError, TypeError):
continue
if microdata:
for d in self.mdedata:
logger.debug('Analysing W3C microdata: ' + pformat(d))
if re.match(r'https?://schema.org/NewsArticle/?',
d.get('type', '')):
outd.update(d)
if rdfa:
raise NotImplementedError
# logger.debug('Returning schema.org NewsArticle: '+pformat(outd))
return outd
