python 爬取网站图片

 爬取图片方法一: requests

#!/usr/bin/python2.7 
# -*- coding: utf-8 -*-
import re
import requests
import os
import shutil

suyan_url= 'http://www.xiaohuar.com/s-1-2069.html'

response  = requests.get(suyan_url)
# print(response.content)

lists = re.findall(r'href="(?:.*?)".*?class="(?:.*?)"',response.text,re.S)  #re.S 把文本信息转换成1行匹配

folder = 'aabb'
if os.path.exists(folder):
        shutil.rmtree(folder)
os.mkdir(folder);
os.chdir(folder);

for each in lists:
    imgurl = each.split(' ')[0][6:-1]
    if imgurl[-4:] == '.jpg':
        filename = imgurl.split('/')[-1]
        img  = requests.get(imgurl)
        with open(filename,'wb') as f:
            f.write(img.content)

爬取图片方法二：urllib.request

import urllib.request
import os
import random
import shutil

def url_open(url):
    req = urllib.request.Request(url)
    #模拟浏览器登陆 获取
    req.add_header('User-Agent', 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36')
    
    proxies = ['124.207.82.166:8008', '218.89.14.142:8060', '49.64.86.43:8080', '101.231.104.82:80']
    proexy = random.choice(proxies)
    # 使用代理ip访问
    proxy_support = urllib.request.ProxyHandler({'http':proexy})
    opener = urllib.request.build_opener(proxy_support)
    urllib.request.install_opener(opener)

    response = urllib.request.urlopen(req)
    html = response.read()

    return html

def get_page(url):
    html = url_open(url).decode('utf-8')
    a = html.find('current-comment-page') + 23
    b = html.find(']', a)
    # print(html[a:b])
    print(url)
    return html[a:b]

def find_imgs(url):
    html = url_open(url).decode('utf-8')
    img_addrs = [];
    a = html.find('img src=')
    while a != -1:
        b = html.find('.jpg', a, a+255)    
        if  b != -1:
            img_addrs.append('http:' + html[a+9:b+4])
        else:
            b = a + 9
        a = html.find('img src=', b)
    for each in img_addrs:
        print(each)
    return img_addrs

def save_imgs(folder, img_addrs):
    idx = 0
    for each in img_addrs:
        filename = each.split('/')[-1]
        idx += 1
        with open(filename, 'wb') as f:
            print('-------' + str(idx))
            img = url_open(each)
            f.write(img)

def download_mm(folder='HHAA', pages=10):
    if os.path.exists(folder):
        shutil.rmtree(folder) #如果存在这个文件夹，则删除文件夹 并 删除里面的文件
    os.mkdir(folder) #创建一个文件夹
    os.chdir(folder)  #将工作目录定位到当前的文件夹
    print(os.path)

    url = 'http://jandan.net/ooxx/'
    page_num = int(get_page(url))

    for i in range(pages):
        page_num -= i
        page_url = url + 'page-' + str(page_num) + '#comments'
        print(page_url)
        img_addrs = find_imgs(page_url)
        save_imgs(folder, img_addrs)


if __name__ == '__main__':
    download_mm()