大体思路
使用redis作为队列,买了一份蘑菇代理,但是这个代理每5秒可以请求一次,我们将IP请求出来,从redis列表队列的左侧插入,要用的时候再从右侧取出,请求成功证明该IP是可用的,将该代理IP从左侧放回,三次都请求失败则认为该代理IP已经失效
代码如下:
import requests
import json
import redis
import time
r = redis.Redis(host='127.0.0.1', port=6379,db=3)
num = r.llen('the_ip')
print(num)
while True:
if num<5:
ip = requests.get('http://piping.mogumiao.com/proxy/api/get_ip_al?appKey=b9bfb84c7ca34fec9f51b3a9dca147e5&count=2&expiryDate=0&format=1').text
print(ip)
code = json.loads(ip)['code']
if code=='0':
msg = json.loads(ip)['msg']
for i in msg:
ip = i['ip']+':'+i['port']
print(ip)
r.lpush('the_ip',ip)
num = r.llen('the_ip')
elif code=='3001':
"提取频繁,5秒提取一次!"
time.sleep(5)
else:
print('调用IP接口错误,错误类型为'+code)
else:
print('IP池已经满了')
num = r.llen('the_ip')
time.sleep(3)
上面这些代码是保证redis代理IP池里始终有5个左右的代理IP
import requests
import json
import redis
import time
from lxml import etree
r = redis.Redis(host='127.0.0.1', port=6379,db=3)
def get_source(url,header,data=None):
ip = r.rpop('the_ip').decode('utf8')
print('提取ip',ip)
if data==None:
n = 0
while True:
try:
source = requests.get(url,headers=header,proxies={'http':ip},timeout=5).content
r.lpush('the_ip',ip)
print('请求成功返还IP',ip)
return source
except:
n+=1
print('请求失败'+str(n)+'次')
if n==3:
return get_source(url,header)
else:
source = requests.get(url, headers=header, proxies={'http': ip},data=data).content
return source
header = {'User-Agent': "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.117 Safari/537.36}"
}
while True:
source = get_source('http://www.ip111.cn/',header).decode('utf8')
show = etree.HTML(source).xpath('//tr[2]/td[2]/text()')
print(show)
上面的代理是循环请求查看当前IP的网址,从而看出代理IP的变化。每次请求都是轮着使用代理的,可以是代理用更长时间而不必担心老用一个代理IP被封了