用selenium爬取淘宝美食

‘‘‘利用selenium爬取淘宝美食网页内容‘‘‘

import re
from selenium import webdriver
from selenium.common.exceptions import TimeoutException
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from pyquery import PyQuery as pq
from config import *

driver = webdriver.PhantomJS(service_args=SERVICE_ARGS)
# driver = webdriver.Chrome()
wait = WebDriverWait(driver, 10)

driver.set_window_size(1400,900)            #有这这句话就是可以爬取到网页的内容，没有的话就出现TimeOut错误

def search():
    print(‘正在搜索‘)
    try:
        driver.get(‘http://www.taobao.com‘)
        s_input = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR,‘#q‘)))
        sumbit = wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR,‘#J_TSearchForm > div.search-button > button‘)))
        s_input.send_keys(KEYWORD)
        sumbit.click()
        totle = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR,‘#mainsrp-pager > div > div > div > div.total‘)))
        get_products()
        return totle.text
    except TimeoutException:
        print(‘TimeOut‘)
        return search()

def next_page(page_number):
    print(‘正在翻页‘, page_number)
    try:
        s_input = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, ‘#mainsrp-pager > div > div > div > div.form > input‘)))
        sumbit = wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR, ‘#mainsrp-pager > div > div > div > div.form > span.btn.J_Submit‘)))
        s_input.clear()
        s_input.send_keys(page_number)
        sumbit.click()
        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)))
        get_products()
    except TimeoutException:
        print(‘TimeOut‘)
        next_page(page_number)

def get_products():
    wait.until(EC.presence_of_element_located((By.CSS_SELECTOR,‘#mainsrp-itemlist .items .item‘)))
    html = driver.page_source
    doc = pq(html)
    items = doc(‘#mainsrp-itemlist .items .item‘).items()
    for item in items:
        product = {
            ‘image‘: item.find(‘.pic .img‘).attr(‘src‘),
            ‘price‘:item.find(‘.price‘).text(),
            ‘deal‘: item.find(‘.deal-cnt‘).text()[:-3],
            ‘title‘: item.find(‘.title‘).text(),
            ‘shop‘: item.find(‘.shop‘).text(),
            ‘location‘: item.find(‘.location‘).text()
        }
        print(product)


def main():
    try:
        totle = search()
        totle = int(re.compile(‘(\d+)‘).search(totle).group(1))
        for num in range(2,totle + 1):
            next_page(num)
    except Exception as e:
        print(e)
    finally:        #最后执行的操作
        driver.close()

if __name__  == ‘__main__‘:
    main()

SERVICE_ARGS = [‘--load-images=false‘, ‘--disk-cache=true‘]
KEYWORD = ‘美食‘