爬蟲：使用 MySQL 維護(hù) IP 代理池
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來(lái)源：?夏悠然然
https://blog.csdn.net/qq_42730750/article/details/108026476
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【導(dǎo)語(yǔ)】：做爬蟲的時(shí)候，難免會(huì)快速多次地訪問(wèn)某個(gè)網(wǎng)站，觸發(fā)網(wǎng)站的反爬蟲機(jī)制，就會(huì)“封IP”。解決方法之一就是用代理池，本文就向大家介紹使用Mysql維護(hù)一個(gè)代理池的方法。
1. 配置PyCharm
??為了方便寫SQL代碼及實(shí)時(shí)關(guān)注數(shù)據(jù)庫(kù)的信息，我們先配置一下PyCharm。
??找到PyCharm右邊欄的Database，點(diǎn)擊它，然后它的界面會(huì)彈出來(lái)，點(diǎn)擊+號(hào)，選擇數(shù)據(jù)庫(kù)。
如圖示操作，找到我們的小鯨魚MySQL，點(diǎn)擊進(jìn)入。
通過(guò)這個(gè)界面就可以配置MySQL了，這里有幾個(gè)填寫的我已經(jīng)作了標(biāo)注，簡(jiǎn)單介紹一下：
Name: 本次的配置的名字，這里我填的是spider，也可以使用默認(rèn)名@localhost。
Host:?數(shù)據(jù)庫(kù)的IP地址，因?yàn)槲业腗ySQL在本地，所以這里我填的就是localhost。
User:?數(shù)據(jù)庫(kù)的用戶名。
Password:?數(shù)據(jù)庫(kù)的密碼。
Database:?數(shù)據(jù)庫(kù)的名字，我這里提前建了一個(gè)名為spider的數(shù)據(jù)庫(kù)。
URL: 這里我們?cè)诤竺婕由?serverTimezone=UTC,否則的話等會(huì)兒我們連接時(shí)會(huì)出現(xiàn)Server returns invalid timezone. Go to ‘Advanced’ tab and set‘serverTimezone’ property manually.錯(cuò)誤，或者按照錯(cuò)誤提示，去Advanced選項(xiàng)配置一下Advanced。
配置完后就點(diǎn)擊Test Connection按鈕，如果提示缺少驅(qū)動(dòng)文件，直接在彈出的對(duì)話框點(diǎn)擊下載即可，不出意外的話，就會(huì)在下面出現(xiàn)連接成功的信息。
插入數(shù)據(jù)后，按圖示操作刷新一下，然后雙擊數(shù)據(jù)表，就可以看到數(shù)據(jù)表中的信息了，美滋滋ヾ(@▽@)ノ。
2. 函數(shù)介紹
??這里我們通過(guò)pymysql庫(kù)來(lái)操作MySQL數(shù)據(jù)庫(kù)，我的數(shù)據(jù)庫(kù)版本是8.0.16，還是去年安裝的，這里不再敘述其安裝步驟了，問(wèn)問(wèn)度娘。
??維護(hù)我們代理IP池的大致流程就是：先建立一個(gè)數(shù)據(jù)表ipproxy，包含有ip字段、score字段，因?yàn)橛行㊣P有時(shí)候可以用，有時(shí)候不可以，所以這里對(duì)每個(gè)要存入數(shù)據(jù)庫(kù)的IP設(shè)置一個(gè)分?jǐn)?shù)，我這里設(shè)置的最高分是5，也就是質(zhì)量最高。如果我們?cè)谑褂眠^(guò)程中發(fā)現(xiàn)IP不能用了，就將其分?jǐn)?shù)減1；如果可以用，且分?jǐn)?shù)小于5，就加1，然后定期清理分?jǐn)?shù)為0的IP。
3. 代碼實(shí)現(xiàn)
這里只貼出了增加的數(shù)據(jù)庫(kù)操作代碼及修改后的IP測(cè)試代碼。
import pymysqlimport requestsfrom bs4 import BeautifulSoupimport pickleimport aiohttpimport asyncioimport timeimport randomasync def test_newip(ip_, url, ip_ok):headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) ''AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36'}conn = aiohttp.TCPConnector(verify_ssl=False)async with aiohttp.ClientSession(connector=conn) as session:print('正在測(cè)試ip: ' + ip_)try:proxy_ip = 'http://' + ip_async with session.get(url=url, headers=headers, proxy=proxy_ip, timeout=15) as response:if response.status == 200:print('代理可用: ' + ip_)ip_ok.append((ip_, 5))else:print('請(qǐng)求響應(yīng)碼不合法 ' + ip_)except:ip_ok.append((ip_, 4))print('代理請(qǐng)求失敗', ip_)async def test_mysqlip(ip_, url, ip_ok):headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) ''AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36'}conn = aiohttp.TCPConnector(verify_ssl=False)async with aiohttp.ClientSession(connector=conn) as session:print('正在測(cè)試ip: ' + ip_[0])try:proxy_ip = 'http://' + ip_[0]async with session.get(url=url, headers=headers, proxy=proxy_ip, timeout=15) as response:if response.status == 200:print('ip可用: ' + ip_[0])new_score = 5 if ip_[1] == 5 else ip_[1] + 1ip_ok.append((ip_[0], new_score))else:print('請(qǐng)求響應(yīng)碼不合法 ' + ip_[0])except:new_score = 0 if ip_[1] == 0 else ip_[1] - 1ip_ok.append((ip_[0], new_score))print('代理請(qǐng)求失敗', ip_[0])def get_mysqlip():db = pymysql.connect(host='localhost', port=3306, user='用戶名', password='密碼',database='數(shù)據(jù)庫(kù)名', charset='utf8')cursor = db.cursor()sql = 'select ip, score from ipproxy'try:cursor.execute(sql)mysql_ip = list(cursor.fetchall())return mysql_ipexcept Exception as err:print('查詢錯(cuò)誤!!!')print(err)def update_ipscore(ip_list):db = pymysql.connect(host='localhost', port=3306, user='用戶名', password='密碼',database='數(shù)據(jù)庫(kù)名', charset='utf8')cursor = db.cursor()for ip_ in ip_list:sql = 'update ipproxy set score=%s where ip=%s'cursor.execute(sql, (ip_[1], ip_[0]))db.commit()cursor.close()db.close()def delete_ip():db = pymysql.connect(host='localhost', port=3306, user='用戶名', password='密碼',database='數(shù)據(jù)庫(kù)名', charset='utf8')cursor = db.cursor()sql = 'delete from ipproxy where score=0'try:cursor.execute(sql)except Exception as err:print('刪除錯(cuò)誤!!!')print(err)db.commit()cursor.close()db.close()def delete_ideticalip():db = pymysql.connect(host='localhost', port=3306, user='用戶名', password='密碼',database='數(shù)據(jù)庫(kù)名', charset='utf8')cursor = db.cursor()sql = 'delete from ipproxy where ip in (select ip from (select ip from ipproxy group by ip having count(*)>1) s1)' \'and id not in (select id from (select id from ipproxy group by ip having count(*)>1) s2)'try:cursor.execute(sql)except Exception as err:print('刪除錯(cuò)誤!!!')print(err)db.commit()cursor.close()db.close()def insert_ip(ip_list):# 新爬取的ip直接插入數(shù)據(jù)庫(kù)db = pymysql.connect(host='localhost', port=3306, user='用戶名', password='密碼',database='數(shù)據(jù)庫(kù)名', charset='utf8')cursor = db.cursor()sql = 'create table if not exists ipproxy(' \'id int not null primary key auto_increment, ' \'ip char(21) not null , ' \'score int not null ) default charset utf8'cursor.execute(sql)try:sql = 'insert into ipproxy (ip, score) values (%s, %s)'cursor.executemany(sql, ip_list)# cursor.execute('drop table ipproxy')except Exception as err:print('插入錯(cuò)誤!!!')print(err)db.commit()cursor.close()db.close()def insret_mysqlip(urls):ip_list1 = get_66ip()ip_list2 = get_kaixinip()ip_list3 = get_goubanjiaip()ip_list = list(set(ip_list1 + ip_list2 + ip_list3))print('已做去重處理!')ip_ok = []print('開始測(cè)試新爬取的ip: ')try:loop = asyncio.get_event_loop()for i in range(0, len(ip_list), 10):proxies_ip = ip_list[i: i + 10]tasks = [test_newip(proxy_ip, random.choice(urls), ip_ok) for proxy_ip in proxies_ip]loop.run_until_complete(asyncio.wait(tasks))time.sleep(3)except Exception as err:print('發(fā)生錯(cuò)誤:', err.args)insert_ip(ip_ok)print('數(shù)據(jù)保存完畢!')def update_mysqlip(urls):ip_list = get_mysqlip()ip_ok = []print('開始測(cè)試新爬取的ip: ')try:loop = asyncio.get_event_loop()for i in range(0, len(ip_list), 10):proxies_ip = ip_list[i: i + 10]tasks = [test_mysqlip(proxy_ip, random.choice(urls), ip_ok) for proxy_ip in proxies_ip]loop.run_until_complete(asyncio.wait(tasks))time.sleep(3)except Exception as err:print('發(fā)生錯(cuò)誤:', err.args)update_ipscore(ip_ok)print('數(shù)據(jù)更新完畢!')delete_ip()print('已刪除score為0的ip!')delete_ideticalip()print('已做去重處理!')if __name__ == '__main__':urls = ['https://blog.csdn.net/qq_42730750/article/details/107868879','https://blog.csdn.net/qq_42730750/article/details/107931738','https://blog.csdn.net/qq_42730750/article/details/107869022','https://blog.csdn.net/qq_42730750/article/details/108016855','https://blog.csdn.net/qq_42730750/article/details/107703589','https://blog.csdn.net/qq_42730750/article/details/107869233','https://blog.csdn.net/qq_42730750/article/details/107869944','https://blog.csdn.net/qq_42730750/article/details/107919690']insret_mysqlip(urls)update_mysqlip(urls)
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