10. Selenium爬取淘宝商品

① 案例要求

• 使用Selenium爬取淘宝商品，指定关键字和指定页码信息来进行爬取

② 案例分析：

• url地址：https://s.taobao.com/search?q=ipad

③ 具体代码实现

'''通过关键字爬取淘宝网站的信息数据'''
from selenium import webdriver
from selenium.common.exceptions import TimeoutException
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.support.wait import WebDriverWait
from pyquery import PyQuery as pq
from urllib.parse import quote

KEYWORD = "ipad"
MAX_PAGE = 10

# browser = webdriver.Chrome()
# browser = webdriver.PhantomJS()
#创建谷歌浏览器对象，启用Chrome的Headless无界面模式
chrome_options = webdriver.ChromeOptions()
chrome_options.add_argument('--headless')
browser = webdriver.Chrome(chrome_options=chrome_options)
#显式等待：
wait = WebDriverWait(browser, 10)

def index_page(page):
    '''抓取索引页 :param page: 页码'''
    print('正在爬取第', page, '页')
    try:
        url = 'https://s.taobao.com/search?q=' + quote(KEYWORD)
        browser.get(url)
        if page > 1:
            input = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, '#mainsrp-pager div.form > input')))
            submit = wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR, '#mainsrp-pager div.form > span.btn.J_Submit')))
            input.clear()
            input.send_keys(page)
            submit.click()
        #等待条件：显示当前页号，显式商品
        wait.until(EC.text_to_be_present_in_element((By.CSS_SELECTOR, '#mainsrp-pager li.item.active > span'), str(page)))
        wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, '.m-itemlist .items .item')))
        get_products()
    except TimeoutException:
        index_page(page)


def get_products():
    '''提取商品数据'''
    html = browser.page_source
    doc = pq(html)
    items = doc('#mainsrp-itemlist .items .item').items()
    for item in items:
        product = {
            'image': item.find('.pic .img').attr('data-src'),
            'price': item.find('.price').text(),
            'deal': item.find('.deal-cnt').text(),
            'title': item.find('.title').text(),
            'shop': item.find('.shop').text(),
            'location': item.find('.location').text()
        }
        print(product)
        save_data(product)


def save_data(result):
    '''保存数据'''
    pass

def main():
    '''遍历每一页'''
    for i in range(1, MAX_PAGE + 1):
        index_page(i)
    browser.close()


# 主程序入口
if __name__ == '__main__':
    main()