最近决定冲击一下python的爬虫，爬取的目标是https://book.douban.com/top250，非常简单，但是呢？因为频繁的请求导致被网站制裁了，我的ip被封了。=-=。。。。，怎么办呢？换个ip就行了呀？因为俺是面向百度编程，通过一顿搜索之后，解决ip被封的答案就是建立一个ip代理池，通过获取网上的白嫖ip来访问要爬取的页面，但由于能力不够，加上有点懒，我找到了一个github开源项目！GitHub - Python3WebSpider/ProxyPool: An Efficient ProxyPool with Getter, Tester and Serverhttps://github.com/Python3WebSpider/ProxyPool       这是地址！

下面分享爬虫源码用的数据库是sqlite3

import time
# import urllib.request,urllib.error 
import requests
# tips 这里我之前用的是urllib.request,但后来发现requests好用点
from bs4 import BeautifulSoup
import sqlite3
import re
def main():
    Url = 'https://book.douban.com/top250?start='
    data = getText(Url)
    savepath = 'book.sql'
    save(data,savepath)
text = re.compile(r'<a .*title="(.*?)">.*?</a>',re.S)
img = re.compile(r'<img src="(.*?)" .*>.*',re.S)
details = re.compile(r'<p class="pl">(.*?)</p>',re.S)
def getText(Url):
    data = []
    for i in range(0,10):
        url = Url+ str(i*25)
        html = askURL(url)
        soup = BeautifulSoup(html,'html.parser')
        for item in soup.find_all('tr',class_="item"):
            d = []
            item = str(item)
            txt = re.findall(text,item)
            imgs = re.findall(img,item)
            detail = re.findall(details,item)
            d.append(''.join(txt))
            d.append(''.join(imgs))
            d.append(''.join(detail))
            data.append(d)
    return data
def askURL(Url):
    head = {
        'User-Agent':'Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.6) Gecko/20091201 Firefox/3.5.6'
    }
    proxies = {'http': 'ip:端口'} #这里是代理ip
    req = requests.get(Url,headers=head,proxies=proxies,timeout=10)
    html = req.text
    return html
def save(data,savepath):
    init_db(savepath)
    conn = sqlite3.connect(savepath)
    cur = conn.cursor()
    for data in data:
        for index in range(len(data)):
            if index == 4 or index ==5:
                continue
            data[index] = '"' + data[index]+'"'
        sql = '''
            insert into bookTop(
            book_name,pic_link,detail
            )values(%s)
        '''%",".join(data)
        cur.execute(sql)
        conn.commit()
    cur.close()
    conn.close()
def init_db(savepath):
    createSql = '''
        create table bookTop
        (
        id integer primary key autoincrement,
        book_name varchar,
        pic_link text,
        detail text 
        ) '''
    con = sqlite3.connect(savepath)
    cur = con.cursor()
    cur.execute(createSql)
    con.commit()
    con.close()
if __name__ == '__main__':
    print('hh')
    main()
    print('ok')

然后将它封装成接口用的是flask框架

import sqlite3
from flask import Flask,jsonify,request
from gevent import pywsgi
app = Flask(__name__)
@app.route('/getData', methods=['post']) #这里是请求路径和方法
def getData():
 con = sqlite3.connect('book.sql')
 cur = con.cursor()
 sql = 'select book_name,pic_link,detail from bookTop'
 data = []
 try:
    cur.execute(sql)
    book_all = cur.fetchall()
    for i in book_all:
        data.append(i)
 except Exception as e:
    print(e)
    print('查询失败')
 finally:
    cur.close()
    con.close()
 return jsonify(data)

if __name__ == '__main__':
    print('服务启动')
    server = pywsgi.WSGIServer(('0.0.0.0', 50), app)
    server.serve_forever()

前端我用electron创建了vue-cli，有兴趣可以马梓东/Vue electron - Gitee.com