selenium爬取煎蛋网

selenium爬取煎蛋网

直接上代码

from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as ES
import requests
import urllib.request
import os
from lxml import etree
t = 0
class Custer(object):
driver_path = r"D:\Program Files (x86)\Google\Chrome\Application\chromedriver.exe"
def __init__(self):
self.driver = webdriver.Chrome(executable_path=self.driver_path)
self.url = "http://jandan.net/ooxx"
def run(self):
self.driver.get(self.url)
while True:
all_source = self.driver.page_source
html = etree.HTML(all_source)
self.xqy(html)
WebDriverWait(self.driver,10).until(
ES.presence_of_element_located((By.XPATH,"//div[@class='cp-pagenavi']/a[last()]"))
)
try:
Btn = self.driver.find_element_by_xpath("//div[@class='cp-pagenavi']/a[last()]")
if "Older Comments" in Btn.get_attribute("title"):
Btn.click()
else:
break
except:
print("出现异常") def xqy(self,html):
all_content = html.xpath("//div[@class='row']//div")
all_author = all_content[0].xpath("//div[@class='author']/strong/text()") #作者列表 #*****************给自己的重点**********************
#给列表重复元素加工 如果不加工进入字典会少很多元素
for index,item in enumerate(all_author):
global t
if item in all_author[0:index]: #判断当前元素是否与之前元素重复 如果重复,则重命名
t=t+1
all_author[index] = item+str(t) #如多个重命名使作者加上字符1 依次类推
#*************************************************** WebDriverWait(self.driver, 10).until(
ES.presence_of_element_located((By.XPATH, "//div[@class='text']//img"))
)
all_img = all_content[1].xpath("//div[@class='text']//img//@src") #图片列表
#解决有个张图片没有http:协议
for index,item in enumerate(all_img):
if 'http:' not in item:
all_img[index] = 'http:'+item dic = dict(zip(all_author,all_img)) #多个列表生产字典
#遍历字典保存图片
for key in dic:
hz = os.path.splitext(dic[key])[1] #取出后缀名.jpg/.png
filename = key+hz #文件名(标题+后缀名)
urllib.request.urlretrieve(dic[key],'images/'+filename) def main():
rea = Custer()
rea.run() if __name__ == '__main__':
main()

爬取的图片

selenium爬取煎蛋网

进阶

个人用了个多线程   但不知道是不是多线程爬取 感觉爬取速度快多了

from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as ES
import requests
import threading
import urllib.request
import os
from lxml import etree
t = 0
gCondition = threading.Condition()
class Custer(threading.Thread):
driver_path = r"D:\Program Files (x86)\Google\Chrome\Application\chromedriver.exe"
driver = webdriver.Chrome(executable_path=driver_path)
url = "http://jandan.net/ooxx"
def run(self):
self.driver.get(self.url)
while True:
all_source = self.driver.page_source
html = etree.HTML(all_source)
self.xqy(html)
WebDriverWait(self.driver,10).until(
ES.presence_of_element_located((By.XPATH,"//div[@class='cp-pagenavi']/a[last()]"))
)
gCondition.acquire() #加上锁(如果不加锁那么多个线程可能同时请求一个或多个图片)
try:
Btn = self.driver.find_element_by_xpath("//div[@class='cp-pagenavi']/a[last()]")
if "Older Comments" in Btn.get_attribute("title"):
gCondition.release() #解锁
Btn.click()
else:
break except:
print("出现异常") def xqy(self,html):
all_content = html.xpath("//div[@class='row']//div")
all_author = all_content[0].xpath("//div[@class='author']/strong/text()") #作者列表 #*****************给自己的重点**********************
#给列表重复元素加工 如果不加工进入字典会少很多元素
for index,item in enumerate(all_author):
global t
if item in all_author[0:index]: #判断当前元素是否与之前元素重复 如果重复,则重命名
t=t+1
all_author[index] = item+str(t) #如多个重命名使作者加上字符 依次类推
#*************************************************** WebDriverWait(self.driver, 10).until(
ES.presence_of_element_located((By.XPATH, "//div[@class='text']//img"))
)
all_img = all_content[1].xpath("//div[@class='text']//img//@src") #图片列表
#解决有个张图片没有http:协议
for index,item in enumerate(all_img):
if 'http:' not in item:
all_img[index] = 'http:'+item dic = dict(zip(all_author,all_img)) #多个列表生产字典
#遍历字典保存图片
for key in dic:
hz = os.path.splitext(dic[key])[1] #取出后缀名.jpg/.png
filename = key+hz #文件名(标题+后缀名)
urllib.request.urlretrieve(dic[key],'images/'+filename) def main():
for i in range(9):
rea = Custer()
rea.start() if __name__ == '__main__':
main()

 

上一篇:Luogu 1349 广义斐波那契数列(递推,矩阵,快速幂)


下一篇:js中函数参数基本类型和引用类型的区别