def is_dup_detail(detail_url, spider_name, channel_id=0):
"""
检查详细页是否重复
:param detail_url:
:param spider_name:
:param channel_id:
:return:
"""
detail_dup_key = 'dup:%s:%s' % (spider_name, channel_id)
detail_url_finger = get_request_finger(detail_url)
return redis_client.sismember(detail_dup_key, detail_url_finger)
def add_dup_detail(detail_url, spider_name, channel_id=0):
"""
把当前详细页加入集合
:param detail_url:
:param spider_name:
:param channel_id:
:return:
"""
detail_dup_key = 'dup:%s:%s' % (spider_name, channel_id)
detail_url_finger = get_request_finger(detail_url)
return redis_client.sadd(detail_dup_key, detail_url_finger)
def parse_article_list(self, response):
"""
文章列表解析
没有翻页特征 <a class=\"page next S_txt1 S_line1 page_dis\"><span>下一页<\/span>
解析链接 href=\"\/p\/1005051627825392\/wenzhang?pids=Pl_Core_ArticleList__61&cfs=600&Pl_Core_ArticleList__61_filter=&Pl_Core_ArticleList__61_page=6#Pl_Core_ArticleList__61\"
"""
print('task_url: %s' % response.url)
# 页面解析(微博是JS动态数据, 无法直接解析页面)
article_list_body = response.body_as_unicode()
article_list_rule = r'<script>FM.view\({"ns":"pl.content.miniTab.index","domid":"Pl_Core_ArticleList__\d+".*?"html":"(.*?)"}\)</script>'
article_list_re_parse = re.compile(article_list_rule,
re.S).findall(article_list_body)
if not article_list_re_parse:
return
article_list_html = ''.join(article_list_re_parse)
# 转义字符处理
article_list_html = article_list_html.replace('\\r', '')
article_list_html = article_list_html.replace('\\t', '')
article_list_html = article_list_html.replace('\\n', '')
article_list_html = article_list_html.replace('\\"', '"')
article_list_html = article_list_html.replace('\\/', '/')
article_list_doc = fromstring(article_list_html)
article_list_doc_parse = article_list_doc.xpath(
'//div[@class="text_box"]')
for article_item in article_list_doc_parse:
article_detail_url = article_item.xpath(
'./div[@class="title W_autocut"]/a[@class="W_autocut S_txt1"]/@href'
)
article_detail_title = article_item.xpath(
'./div[@class="title W_autocut"]/a[@class="W_autocut S_txt1"]/text()'
)
article_detail_abstract = article_item.xpath(
'./div[@class="text"]/a[@class="S_txt1"]/text()')
if not (article_detail_url and article_detail_title):
continue
article_detail_url = article_detail_url[0].strip()
article_detail_url = response.urljoin(article_detail_url)
article_detail_title = article_detail_title[0].strip()
article_detail_abstract = article_detail_abstract[0].strip(
) if article_detail_abstract else ''
meta_article_item = {
'article_url': article_detail_url,
'article_title': article_detail_title,
'article_abstract': article_detail_abstract,
'article_id': get_request_finger(article_detail_url),
}
meta = dict(response.meta, **meta_article_item)
# 两种不同类型页面
if '/ttarticle/p/show?id=' in article_detail_url:
yield scrapy.Request(url=article_detail_url,
callback=self.parse_article_detail_html,
meta=meta)
else:
yield scrapy.Request(url=article_detail_url,
callback=self.parse_article_detail_js,
meta=meta)
# 翻页处理
next_url_parse = article_list_doc.xpath(
'//a[@class="page next S_txt1 S_line1"]/@href')
if not next_url_parse:
print('当前条件列表页最后一页：%s' % response.url)
else:
next_url = next_url_parse[0]
next_url = response.urljoin(next_url)
print(next_url)
yield scrapy.Request(url=next_url,
callback=self.parse_article_list,
meta=response.meta)
