1、项目流程
# 中心调度
defmain():
try:
total = search()
total = int(re.compile('.*?(d+).*?').search(total).group(1))
fori inrange(2,total+1):
next_page(i)
exceptException ase:
print('异常')
finally:
browser.close()# 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()
returntotal.text
exceptTimeoutException ase:
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()
exceptNoSuchElementException ase:
print('元素未加载')
returnnext_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()
foritem initems:
product = {
'image':item.find('.pic-link .img').attr('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)#!/usr/bin/python
# -*- coding: utf-8 -*-
importpymongo
importre
frompyquery importPyQuery
fromselenium importwebdriver
fromselenium.webdriver.common.by importBy
fromselenium.webdriver.support.ui importWebDriverWait
fromselenium.webdriver.support importexpected_conditions asEC
fromselenium.common.exceptions importTimeoutException,NoSuchElementException
fromsetting 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()
returntotal.text
exceptTimeoutException ase:
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()
exceptNoSuchElementException ase:
print('元素未加载')
returnnext_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()
foritem initems:
product = {
'image':item.find('.pic-link .img').attr('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:
ifdb[MONGO_TABLE].insert(product):
print('保存成功', product)
exceptException:
print('保存失败')
# 中心调度
def main():
try:
total = search()
total = int(re.compile('.*?(d+).*?').search(total).group(1))
fori inrange(2,total+1):
next_page(i)
exceptException ase:
print('异常')
finally:
browser.close()
if__name__=='__main__':
main()