使用selenium结合PhantomJS爬取淘宝美食并存储到MongoDB

Posted 2020-10-17 来呀来呀

PhantomJS是一种没有界面的浏览器，便于爬虫

1、PhantomJS下载

2、phantomjs无须安装driver，还有具体的api参考：

http://phantomjs.org/api/command-line.html

 

3、配置config.py

 

1 MONGO_URL = \'localhost:27017\'
2 MONGO_DB = \'taobao\'
3 MONGO_TABLE = \'iphonex\'
4 
5 SEACH_KEYS=\'iPhoneX\'
6 
7 SERVICE_ARGS=[\'--disk-cache=true\',\'--load-images=false\'] #开启缓存，不加载图片
8 EXECUTABLE_PATH=r\'C:\\test\\phantomjs-2.1.1-windows\\bin\\phantomjs.exe\'

 

　　

4、爬取如下spider.py

 1 import re
 2 
 3 from selenium import webdriver
 4 from selenium.common.exceptions import TimeoutException
 5 from selenium.webdriver.common.by import By
 6 from selenium.webdriver.support.ui import WebDriverWait
 7 from selenium.webdriver.support import expected_conditions as EC
 8 from pyquery import PyQuery as pq
 9 from config import *
10 import pymongo
11 
12 client=pymongo.MongoClient(MONGO_URL)
13 db=client[MONGO_DB]
14 
15 # browser = webdriver.Chrome()
16 browser=webdriver.PhantomJS(executable_path=EXECUTABLE_PATH,service_args=SERVICE_ARGS)
17 
18 wait=WebDriverWait(browser,20)
19 browser.maximize_window() #窗口最大化避免出问题
20 def save_to_mongo(result):
21     try:
22         if db[MONGO_TABLE].insert(result):
23             print(\'存储到MongoDB成功\',result)
24     except Exception:
25         print(\'存储到MongoDB失败\',result)
26 
27 def search(search_key):
28     try:
29         browser.get("http://www.taobao.com")
30         input = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, "#q")))#直到定位到这个元素
31         submit= wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR, "#J_TSearchForm > div.search-button > button")))  #等到元素可点击
32         input.send_keys(search_key)
33         submit.click()
34         total_pages=wait.until(EC.presence_of_element_located((By.CSS_SELECTOR,\'#mainsrp-pager > div > div > div > div.total\')))
35         return total_pages.text
36     except  TimeoutException:
37         return search() #超时重试
38 
39 def next_page(page_number):
40     try:
41         input = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, "#mainsrp-pager > div > div > div > div.form > input")))
42         submit = wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR, "#mainsrp-pager > div > div > div > div.form > span.btn.J_Submit")))
43         input.clear()
44         input.send_keys(page_number)
45         submit.click()
46         wait.until(EC.text_to_be_present_in_element((By.CSS_SELECTOR,\'#mainsrp-pager > div > div > div > ul > li.item.active > span\'),str(page_number)))#判断元素中的值是否和指定内容一致
47         get_product()
48         print(page_number)
49     except  TimeoutException:
50         print(\'超时\')
51         return next_page(page_number) #超时重试
52 
53 def get_product():
54     wait.until(EC.presence_of_all_elements_located((By.CSS_SELECTOR,\'#mainsrp-itemlist .items .item\')))
55     html=browser.page_source
56     doc=pq(html)
57     items=doc(\'#mainsrp-itemlist .items .item\').items()
58     for item in items:
59         product={
60             \'image\':item.find(\'.pic img\').attr(\'src\'),
61             \'price\':item.find(\'.price\').text(),
62             \'deal\':item.find(\'.deal-cnt\').text()[:-3],
63             \'title\':item.find(\'.title\').text(),
64             \'shop\':item.find(\'.location\').text()
65         }
66         save_to_mongo(product)
67 
68 def main():
69     try:
70         total=search(search_key=SEACH_KEYS)
71         total=int(re.compile(\'(\\d+)\').search(total).group(1))
72         for i in range(2, total+1):
73             next_page(i)
74     except Exception:
75         print(\'出错啦\')
76     finally:
77         browser.close()
78 
79 
80 if __name__==\'__main__\':
81     main()