python爬虫之——爬取煎蛋网图片

种花家的奋斗兔 2020-11-13 15:08:15
Python 爬虫 图片 煎蛋


事先声明:本人之前并没有听说过什么煎蛋网,代码学习来自其他网站,仅供学习使用。

import requests
import os
import time
from bs4 import BeautifulSoup
# 发出请求获得HTML源码
def get_html(url):
# 指定一个浏览器头
headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36'}
# 代理,免费的代理只能维持一会可能就没用了,自行更换
proxies = {'http': '111.23.10.27:8080'}
try:
# Requests库的get请求
resp = requests.get(url, headers=headers)
except:
# 如果请求被阻,就使用代理
resp = requests.get(url, headers=headers, proxies=proxies)
return resp
# 创建文件夹的函数,保存到D盘
def mkdir(path):
# os.path.exists(name)判断是否存在路径
# os.path.join(path, name)连接目录与文件名
isExists = os.path.exists(os.path.join("D:\jiandan", path))
# 如果不存在
if not isExists:
print('makedir', path)
# 创建文件夹
os.makedirs(os.path.join("D:\jiandan", path))
# 切换到创建的文件夹
os.chdir(os.path.join("D:\jiandan", path))
return True
# 如果存在了就返回False
else:
print(path, 'already exists')
return False
# 获得图片地址调用download函数进行下载
def get_imges():
# 调用函数获得所有页面
for url in all_page():
path = url.split('-')[-1]
# 创建文件夹的函数
mkdir(path)
# 调用请求函数获得HTML源码
html = get_html(url).text
# 使用lxml解析器,也可以使用html.parser
soup = BeautifulSoup(html, 'lxml')
# css选择器
allimgs = soup.select('div.text > p > img')
# 调用download函数下载保存
download(allimgs)
# 执行完毕打出ok
print('ok')
# 获得所有页面
def all_page():
base_url = 'http://jandan.net/ooxx/'
# BeautifulSoup解析页面得到最高页码数
soup = BeautifulSoup(get_html(base_url).text, 'lxml')
# 获得最高页码数
allpage = soup.find('span', class_="current-comment-page").get_text()[1:-1]
urllist = []
# for循环迭代出所有页面,得到url
for page in range(1, int(allpage) + 1):
allurl = base_url + 'page-' + str(page)
urllist.append(allurl)
return urllist
# 保存图片函数,传入的参数是一页所有图片url集合
def download(list):
for img in list:
urls = img['src']
# 判断url是否完整
if urls[0:5] == 'http:':
img_url = urls
else:
img_url = 'http:' + urls
filename = img_url.split('/')[-1]
# 保存图片
with open(filename, 'wb') as f:
# 直接过滤掉保存失败的图片,不终止程序
try:
f.write(get_html(img_url).content)
print('Sucessful image:', filename)
except:
print('Failed:', filename)
if __name__ == '__main__':
# 计时
t1 = time.time()
# 调用函数
get_imges()
print(time.time() - t1)

通过如代码,我们可以在D盘创建目录并保存相关图片。

亲测,代码无误。

(不过,煎蛋网对图片进行了加密,所以,以上代码并不能下载到太多的图片)

参考:https://www.jqhtml.com/13393.html

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本文为[种花家的奋斗兔]所创,转载请带上原文链接,感谢
https://cloud.tencent.com/developer/article/1747752

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