PhantomJS是一種沒有界面的瀏覽器，便於爬蟲

1、PhantomJS下載

2、phantomjs無須安裝driver，還有具體的api參考：

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‘] #
 
開啟緩存，不加載圖片
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() #窗口最大化避免出問題
20 def save_to_mongo(result):
21     try:
22         if db[MONGO_TABLE].insert(result):
23             print(‘存儲到MongoDB成功‘,result)
24     except Exception:
25         print(‘存儲到MongoDB失敗‘,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")))#直到定位到這個元素
31         submit= wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR, "#J_TSearchForm > div.search-button > button")))  #等到元素可點擊
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() #超時重試
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)))#判斷元素中的值是否和指定內容一致
47         get_product()
48         print(page_number)
49     except  TimeoutException:
50         print(‘超時‘)
51         return next_page(page_number) #超時重試
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(‘出錯啦‘)
76     finally:
77         browser.close()
78 
79 
80 if __name__==‘__main__‘:
81     main()

使用selenium結合PhantomJS爬取淘寶美食並存儲到MongoDB