Selenium爬取淘宝实战练习

发表于：2017-5-04 11:34

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作者：蒋蜀黍来源：天善智能

软件测试工具

Selenium

自动化测试工具

　　1、项目流程

　　2、中心调度

# 中心调度

def main():

try:

total = search()

total = int(re.compile('.*?(\d+).*?').search(total).group(1))

for i in range(2,total+1):

next_page(i)

except Exception as e:

print('异常')

finally:

browser.close()

　　3、模拟查询

# 根据关键字查询

def search():

try:

browser.get('https://www.taobao.com/')

# 直到搜索框加载出

input_search = wait.until(EC.presence_of_element_located((By.ID,'q')))

# 直到搜索按钮可以点击

submit_button = wait.until(EC.element_to_be_clickable((By.CLASS_NAME,'btn-search')))

input_search.send_keys(KEYWORDS)

submit_button.click()

total = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR,'div.wraper div.total')))

get_products()

return total.text

except TimeoutException as e:

print('响应超时')

　　4、下一页的操作

# 下一页爬取

def next_page(index):

try:

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(index)

submit.click()

wait.until(EC.text_to_be_present_in_element((By.CSS_SELECTOR,'#mainsrp-pager > div > div > div > ul > li.item.active > span'),str(index)))

get_products()

except NoSuchElementException as e:

print('元素未加载')

return next_page(index)

　　5、商品信息的解析

# 获取一页上所有的商品

def get_products():

wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, "#mainsrp-itemlist .items .item")))

html = browser.page_source

doc = PyQuery(html)

items = doc('.m-itemlist .items .item').items()

for item in items:

product = {

'image':item.find('.pic-link .img').attr('data-src'),

'price':float(item.find('.price').text()[2:]),

'deal':item.find('.deal-cnt').text()[:-3],

'title':item.find('.title').text(),

'shop':item.find('.shop').text(),

'location':item.find('.location').text(),

'keywords':KEYWORDS

}

save_to_mongo(product=product)

　　6、完整代码

#!/usr/bin/python

# -*- coding: utf-8 -*-

import pymongo

import re

from pyquery import PyQuery

from selenium import webdriver

from selenium.webdriver.common.by import By

from selenium.webdriver.support.ui import WebDriverWait

from selenium.webdriver.support import expected_conditions as EC

from selenium.common.exceptions import TimeoutException,NoSuchElementException

from setting import *

client = pymongo.MongoClient(MONGO_HOST)

db = client[MONGO_DB]

browser = webdriver.Chrome()

wait = WebDriverWait(browser,10)

# 根据关键字查询

def search():

try:

browser.get('https://www.taobao.com/')

# 直到搜索框加载出

input_search = wait.until(EC.presence_of_element_located((By.ID,'q')))

# 直到搜索按钮可以点击

submit_button = wait.until(EC.element_to_be_clickable((By.CLASS_NAME,'btn-search')))

input_search.send_keys(KEYWORDS)

submit_button.click()

total = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR,'div.wraper div.total')))

get_products()

return total.text

except TimeoutException as e:

print('响应超时')

# 下一页爬取

def next_page(index):

try:

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(index)

submit.click()

wait.until(EC.text_to_be_present_in_element((By.CSS_SELECTOR,'#mainsrp-pager > div > div > div > ul > li.item.active > span'),str(index)))

get_products()

except NoSuchElementException as e:

print('元素未加载')

return next_page(index)

# 获取一页上所有的商品

def get_products():

wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, "#mainsrp-itemlist .items .item")))

html = browser.page_source

doc = PyQuery(html)

items = doc('.m-itemlist .items .item').items()

for item in items:

product = {

'image':item.find('.pic-link .img').attr('data-src'),

'price':float(item.find('.price').text()[2:]),

'deal':item.find('.deal-cnt').text()[:-3],

'title':item.find('.title').text(),

'shop':item.find('.shop').text(),

'location':item.find('.location').text(),

'keywords':KEYWORDS

}

save_to_mongo(product=product)

# 保存至mongoDB

def save_to_mongo(product):

try:

if db[MONGO_TABLE].insert(product):

print('保存成功', product)

except Exception:

print('保存失败')

# 中心调度

def main():

try:

total = search()

total = int(re.compile('.*?(\d+).*?').search(total).group(1))

for i in range(2,total+1):

next_page(i)

except Exception as e:

print('异常')

finally:

browser.close()

if __name__=='__main__':

main()

　　7、运行结果

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