pip install scrapy -i https://pypi.douban.com/simple

pip install selenium -i https://pypi.douban.com/simple

pip install jieba -i https://pypi.douban.com/simple

scrapy startproject csdn_hot_words

# Define here the models for your scraped items
#
# See documentation in:
# https://docs.scrapy.org/en/latest/topics/items.html
 
import scrapy
 
 
class CsdnHotWordsItem(scrapy.Item):
 # define the fields for your item here like:
 # name = scrapy.Field()
 words = scrapy.Field()

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time : 2021/11/5 23:47
# @Author  : 至尊寶
# @Site : 
# @File : analyse_sentence.py
 
import jieba.analyse
 
 
def get_key_word(sentence):
 result_dic = {}
 words_lis = jieba.analyse.extract_tags(
  sentence, topK=3, withWeight=True, allowPOS=())
 for word, flag in words_lis:
  if word in result_dic:
result_dic[word] += 1
  else:
result_dic[word] = 1
 return result_dic

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time : 2021/11/5 23:47
# @Author  : 至尊寶
# @Site : 
# @File : csdn.py
 
import scrapy
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
 
from csdn_hot_words.items import CsdnHotWordsItem
from csdn_hot_words.tools.analyse_sentence import get_key_word
 
 
class CsdnSpider(scrapy.Spider):
 name = 'csdn'
 # allowed_domains = ['blog.csdn.net']
 start_urls = ['https://blog.csdn.net/rank/list']
 
 def __init__(self):
  chrome_options = Options()
  chrome_options.add_argument('--headless')  # 使用無頭谷歌瀏覽器模式
  chrome_options.add_argument('--disable-gpu')
  chrome_options.add_argument('--no-sandbox')
  self.browser = webdriver.Chrome(chrome_options=chrome_options,
executable_path="E:\\chromedriver_win32\\chromedriver.exe")
  self.browser.set_page_load_timeout(30)
 
 def parse(self, response, **kwargs):
  titles = response.xpath("http://div[@class='hosetitem-title']/a/text()")
  for x in titles:
item = CsdnHotWordsItem()
item['words'] = get_key_word(x.get())
yield item

# Define here the models for your spider middleware
#
# See documentation in:
# https://docs.scrapy.org/en/latest/topics/spider-middleware.html
 
from scrapy import signals
from scrapy.http import HtmlResponse
from selenium.common.exceptions import TimeoutException
import time
 
from selenium.webdriver.chrome.options import Options
 
# useful for handling different item types with a single interface
from itemadapter import is_item, ItemAdapter
 
 
class CsdnHotWordsSpiderMiddleware:
 # Not all methods need to be defined. If a method is not defined,
 # scrapy acts as if the spider middleware does not modify the
 # passed objects.
 
 @classmethod
 def from_crawler(cls, crawler):
  # This method is used by Scrapy to create your spiders.
  s = cls()
  crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
  return s
 
 def process_spider_input(self, response, spider):
  # Called for each response that goes through the spider
  # middleware and into the spider.
 
  # Should return None or raise an exception.
  return None
 
 def process_spider_output(self, response, result, spider):
  # Called with the results returned from the Spider, after
  # it has processed the response.
 
  # Must return an iterable of Request, or item objects.
  for i in result:
yield i
 
 def process_spider_exception(self, response, exception, spider):
  # Called when a spider or process_spider_input() method
  # (from other spider middleware) raises an exception.
 
  # Should return either None or an iterable of Request or item objects.
  pass
 
 def process_start_requests(self, start_requests, spider):
  # Called with the start requests of the spider, and works
  # similarly to the process_spider_output() method, except
  # that it doesn't have a response associated.
 
  # Must return only requests (not items).
  for r in start_requests:
yield r
 
 def spider_opened(self, spider):
  spider.logger.info('Spider opened: %s' % spider.name)
 
 
class CsdnHotWordsDownloaderMiddleware:
 # Not all methods need to be defined. If a method is not defined,
 # scrapy acts as if the downloader middleware does not modify the
 # passed objects.
 
 @classmethod
 def from_crawler(cls, crawler):
  # This method is used by Scrapy to create your spiders.
  s = cls()
  crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
  return s
 
 def process_request(self, request, spider):
  js = '''let height = 0
 let interval = setInterval(() => {
  window.scrollTo({top: height,behavior: "smooth"
  });
  height += 500
 }, 500);
 setTimeout(() => {
  clearInterval(interval)
 }, 20000);
'''
  try:
spider.browser.get(request.url)
spider.browser.execute_script(js)
time.sleep(20)
return HtmlResponse(url=spider.browser.current_url, body=spider.browser.page_source,
 encoding="utf-8", request=request)
  except TimeoutException as e:
print('超時異常:{}'.format(e))
spider.browser.execute_script('window.stop()')
  finally:
spider.browser.close()
 
 def process_response(self, request, response, spider):
  # Called with the response returned from the downloader.
 
  # Must either;
  # - return a Response object
  # - return a Request object
  # - or raise IgnoreRequest
  return response
 
 def process_exception(self, request, exception, spider):
  # Called when a download handler or a process_request()
  # (from other downloader middleware) raises an exception.
 
  # Must either:
  # - return None: continue processing this exception
  # - return a Response object: stops process_exception() chain
  # - return a Request object: stops process_exception() chain
  pass
 
 def spider_opened(self, spider):
  spider.logger.info('Spider opened: %s' % spider.name)

# Define your item pipelines here
#
# Don't forget to add your pipeline to the ITEM_PIPELINES setting
# See: https://docs.scrapy.org/en/latest/topics/item-pipeline.html
 
 
# useful for handling different item types with a single interface
from itemadapter import ItemAdapter
 
 
class CsdnHotWordsPipeline:
 
 def __init__(self):
  self.file = open('result.txt', 'w', encoding='utf-8')
  self.all_words = []
 
 def process_item(self, item, spider):
  self.all_words.append(item)
  return item
 
 def close_spider(self, spider):
  key_word_dic = {}
  for y in self.all_words:
print(y)
for k, v in y['words'].items():
 if k.lower() in key_word_dic:
  key_word_dic[k.lower()] += v
 else:
  key_word_dic[k.lower()] = v
  word_count_sort = sorted(key_word_dic.items(),
  key=lambda x: x[1], reverse=True)
  for word in word_count_sort:
self.file.write('{},{}\n'.format(word[0], word[1]))
  self.file.close()

# Scrapy settings for csdn_hot_words project
#
# For simplicity, this file contains only settings considered important or
# commonly used. You can find more settings consulting the documentation:
#
#  https://docs.scrapy.org/en/latest/topics/settings.html
#  https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
#  https://docs.scrapy.org/en/latest/topics/spider-middleware.html
 
BOT_NAME = 'csdn_hot_words'
 
SPIDER_MODULES = ['csdn_hot_words.spiders']
NEWSPIDER_MODULE = 'csdn_hot_words.spiders'
 
# Crawl responsibly by identifying yourself (and your website) on the user-agent
# USER_AGENT = 'csdn_hot_words (+http://www.yourdomain.com)'
USER_AGENT = 'Mozilla/5.0'
 
# Obey robots.txt rules
ROBOTSTXT_OBEY = False
 
# Configure maximum concurrent requests performed by Scrapy (default: 16)
# CONCURRENT_REQUESTS = 32
 
# Configure a delay for requests for the same website (default: 0)
# See https://docs.scrapy.org/en/latest/topics/settings.html#download-delay
# See also autothrottle settings and docs
DOWNLOAD_DELAY = 30
# The download delay setting will honor only one of:
# CONCURRENT_REQUESTS_PER_DOMAIN = 16
# CONCURRENT_REQUESTS_PER_IP = 16
 
# Disable cookies (enabled by default)
COOKIES_ENABLED = False
 
# Disable Telnet Console (enabled by default)
# TELNETCONSOLE_ENABLED = False
 
# Override the default request headers:
DEFAULT_REQUEST_HEADERS = {
 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
 'Accept-Language': 'en',
 'User-Agent': 'Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.94 Safari/537.36'
}
 
# Enable or disable spider middlewares
# See https://docs.scrapy.org/en/latest/topics/spider-middleware.html
SPIDER_MIDDLEWARES = {
'csdn_hot_words.middlewares.CsdnHotWordsSpiderMiddleware': 543,
}
 
# Enable or disable downloader middlewares
# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
DOWNLOADER_MIDDLEWARES = {
'csdn_hot_words.middlewares.CsdnHotWordsDownloaderMiddleware': 543,
}
 
# Enable or disable extensions
# See https://docs.scrapy.org/en/latest/topics/extensions.html
# EXTENSIONS = {
# 'scrapy.extensions.telnet.TelnetConsole': None,
# }
 
# Configure item pipelines
# See https://docs.scrapy.org/en/latest/topics/item-pipeline.html
ITEM_PIPELINES = {
 'csdn_hot_words.pipelines.CsdnHotWordsPipeline': 300,
}
 
# Enable and configure the AutoThrottle extension (disabled by default)
# See https://docs.scrapy.org/en/latest/topics/autothrottle.html
# AUTOTHROTTLE_ENABLED = True
# The initial download delay
# AUTOTHROTTLE_START_DELAY = 5
# The maximum download delay to be set in case of high latencies
# AUTOTHROTTLE_MAX_DELAY = 60
# The average number of requests Scrapy should be sending in parallel to
# each remote server
# AUTOTHROTTLE_TARGET_CONCURRENCY = 1.0
# Enable showing throttling stats for every response received:
# AUTOTHROTTLE_DEBUG = False
 
# Enable and configure HTTP caching (disabled by default)
# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings
# HTTPCACHE_ENABLED = True
# HTTPCACHE_EXPIRATION_SECS = 0
# HTTPCACHE_DIR = 'httpcache'
# HTTPCACHE_IGNORE_HTTP_CODES = []
# HTTPCACHE_STORAGE = 'scrapy.extensions.httpcache.FilesystemCacheStorage'

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time : 2021/11/5 22:41
# @Author  : 至尊寶
# @Site : 
# @File : main.py
from scrapy import cmdline
 
cmdline.execute('scrapy crawl csdn'.split())