def parse_more(item=None, response=None):
if not item or not response:
return -404
root = lxml.html.fromstring(response.text.encode('utf-8'))
data = {}
# family_sn
match = family_sn_pattern.search(response.url)
data['family_sn'] = match.group(1) if match else item['goods_name']
# catlog
breadcrumb = root.xpath('//p[@class="breadcrumb"]/a')
data['catlog'] = []
for catlog in breadcrumb:
catlog_name = util.cleartext(catlog.text_content())
catlog_url = util.urljoin(response.url, catlog.xpath('./@href')[0])
if catlog_name and catlog_url:
data['catlog'].append([catlog_name, catlog_url])
else:
data['catlog'] = []
break
else:
data['catlog'].append([data['family_sn'], response.url])
# doc
doc = root.xpath('//li[@class="pdf"]/a[@class="doclink"]/@title')
data['doc'] = "http://cds.linear.com/docs/en/datasheet/{title}".format(
title=doc[0]) if doc else ''
item.update(data)
return item
def parse_model_detail(self, response):
'''解析产品详情'''
json_html = re.findall(
r'<script type="application/ld\+json">(.*?)</script>',
response.body, re.S)
if not json_html:
raise DropItem('匹配源码内容异常 请检查：{0}'.format(response.url))
json_data = json.loads(json_html[0])
product_list = json_data['offers']
pre_url = 'https://www.ti.com.cn/product/cn/{}'.format(
json_data['mpn'])
description = json_data['description']
doc_url = urljoin(
self.base_url,
response.xpath(
'//div/a[@data-navtitle="data sheet"]/@href').extract_first())
attrs_items = response.xpath(
'//ti-multicolumn-list/ti-multicolumn-list-row')
attr_list = []
# 获取属性列表
for attrs_item in attrs_items:
attr = attrs_item.xpath(
'./ti-multicolumn-list-cell/span/text()').extract()
if not attr:
continue
key = util.cleartext(attr[0])
val = util.cleartext(attr[1])
if key and val:
attr_list.append((key, val))
# 获取分类列表
cat_list = []
cat_items = response.xpath(
'//ti-breadcrumb/ti-breadcrumb-section/a')[1:]
for cat_item in cat_items:
ckey = util.cleartext(cat_item.xpath('./text()').extract_first())
cval = urljoin(self.base_url,
cat_item.xpath('./@href').extract_first())
cat_list.append((ckey, cval))
for data in product_list:
item = GoodsItem()
data = data['itemOffered']
item['url'] = pre_url
item['goods_sn'] = data['sku']
item['goods_other_name'] = item['goods_name'] = data['mpn']
item['provider_name'] = data['brand']
item['provider_url'] = ''
item['goods_desc'] = description
item['goods_img'] = item['goods_thumb'] = ''
item['doc'] = doc_url
item['rohs'] = 0
shop_price = data['offers'].get('price')
item['tiered'] = []
if not shop_price:
item['stock'] = [0, 1] # 库存
item['increment'] = 1
else:
# 庫存判斷
if not data['offers'].get('inventoryLevel'):
item['stock'] = [0, 1]
else:
item['stock'] = [
util.intval(data['offers']['inventoryLevel']), 1
] # 库存
for price_item in data['offers']['priceSpecification']:
pnum = price_item['eligibleQuantity']['minValue']
pval = price_item['price']
item['tiered'].append(
(util.intval(pnum), util.floatval(pval)))
item['increment'] = item['tiered'][0][0]
if not item['tiered']:
item['tiered'] = [[0, 0.00]]
# 属性
item['attr'] = attr_list
# 分类
item['catlog'] = cat_list
yield item
def _parse_detail_data(resp, headers=None, **kwargs):
"""
解析详情数据，独立出来
@param data 页面数据
@param url 解析的页面url（方便记录异常）
@param kwargs 扩展参数
"""
item = {}
root = lxml.html.fromstring(resp.text.encode('utf-8'))
# goods_name
goods_name = root.xpath('//td[@class="lnk11b-colorOff"]')
item['goods_name'] = util.cleartext(
goods_name[0].text) if goods_name else ''
# goods_sn
match = goods_sn_pattern.search(resp.url)
item['goods_sn'] = match.group(1) if match else ''
if not item['goods_name'] or not item['goods_sn']:
logger.debug("无法解析goods_name和goods_sn URL:{url}".format(url=resp.url))
return -404
# goods_desc
goods_desc = root.xpath('//td[@class="txt11"]/text()')
item['desc'] = util.cleartext(goods_desc[0], '\n',
'\t') if goods_desc else ''
# tiered
tiered = []
price_list = root.xpath('//td[@class="texttable"]')
for x in range(0, len(price_list), 2):
qty = util.intval(price_list[x].text_content())
price = util.floatval(price_list[x + 1].text_content())
if qty and price:
tiered.append([qty, price])
else:
tiered = [[0, 0.00]]
break
if not tiered:
price = root.xpath('//td[@class="txt18b-red"]/text()')
price = util.floatval(price[0]) if price else 0
if price:
tiered = [1, price]
else:
tiered = []
item['tiered'] = tiered if tiered else [[0, 0.00]]
# stock
qty = root.xpath('//input[@id="qty"]/@value')
qty = util.intval(qty[0]) if qty else 1
stock = root.xpath('//input[@id="custcol7"]/@value')
stock = util.intval(stock[0]) if stock else 0
item['stock'] = [stock, qty]
# url
item['url'] = resp.url
# provider_name
item['provider_name'] = 'LINEAR'
item['provider_url'] = ''
# doc catlog
item['doc'] = ''
item['catlog'] = ''
# attr
item['attr'] = []
# rohs
item['rohs'] = -1
item['goods_other_name'] = ''
# increment
item['increment'] = 1
# img
item['goods_img'] = ''
item['goods_thumb'] = ''
# 一些信息需要在linear.com.cn获取
return handle_of_redirects(item)
def _parse_detail_data(resp, headers=None, **kwargs):
"""
解析详情数据，独立出来
@param data 页面数据
@param url 解析的页面url（方便记录异常）
@param kwargs 扩展参数
"""
items = {'list': []}
item = {}
"""解析系列型号数据"""
# gpn
pattern_gpn = re.compile(r'/product/([^/\?\.%&]+)')
gpn = pattern_gpn.search(resp.url)
if not gpn:
logger.debug('status: -403; 解析商品详情失败, url: %s', str(resp.url))
return -403
gpn = gpn.group(1)
soup = BeautifulSoup(resp.text.encode('utf-8'), 'lxml')
# family_sn
item['family_sn'] = gpn.upper()
item['product_id'] = item['family_sn']
# category
breadcrumb_div = soup.find('div', class_='breadcrumb')
cat_log = []
if breadcrumb_div:
for a in breadcrumb_div.find_all('a'):
if 'TI Home' in a.get_text(strip=True):
continue
cat_log.append([a.get_text(strip=True), a['href']])
item['catlog'] = cat_log if cat_log else []
# goods_img, goods_thumb
img_div = soup.find('div', class_='image')
img = img_div.img['src'] if img_div else ''
item['goods_img'] = img
item['goods_thumb'] = img
# attr
attr = []
params_table = soup.find('table', id='paramsName')
data_table = soup.find('table', id='parametricdata')
if params_table and data_table:
attr_params = params_table.find_all('td')[0:-1]
attr_data = data_table.find_all('td', class_='on')[0:-1]
for k, v in zip(attr_params, attr_data):
pattern_blank = re.compile('\s+')
k = pattern_blank.sub(' ', k.get_text(strip=True))
v = pattern_blank.sub(' ', v.get_text(strip=True))
attr.append([k, v])
item['attr'] = attr
# doc
doc_url = soup.find('a', class_='local')
item['doc'] = util.cleartext(doc_url.get('href')) if doc_url else ''
# description
desc = soup.find('h1', class_='productTitle')
item['desc'] = desc.get_text(strip=True) if desc else ''
for p in get_detail(gpn, **kwargs):
item['goods_sn'] = p.get('goods_sn', '')
if not item['goods_sn']:
continue
item['goods_name'] = p.get('goods_sn', '')
item['goods_other_name'] = ''
item['url'] = p.get('url', '')
# item['doc'] = get_data_sheet(gpn, **kwargs)
item['stock'] = p.get('stock', [0, 1])
item['tiered'] = p.get('tiered', [[0, 0.0]])
# 添加供应商品牌
item['provider_name'] = p.get('provider_name', '')
item['provider_url'] = ''
item['increment'] = 1
item['rohs'] = -1
items['list'].append(copy.copy(item))
if not items['list']:
logger.debug('status: -403; 解析商品详情失败, url: %s', str(resp.url))
return -403
return items
