通过爬取西刺代理的免费ip以及端口号构建一个属于我们自己的ip代理池 具体代码如下:
import requests
from scrapy.selector import Selector
import MySQLdb
conn = MySQLdb.connect(host="127.0.0.1",user="root",passwd="123456",db="article_spider",charset="utf8")
cursor = conn.cursor()
def crawl_ips():
headers = {"User-Agent":"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3573.0 Safari/537.36"}
for i in range(3620):
re = requests.get("https://www.xicidaili.com/nn/{0}".format(i),headers=headers)
selector = Selector(text=re.text)
all_trs = selector.css('#ip_list tr')
ip_list = []
for tr in all_trs[1:]:
speed_str = tr.css(".bar::attr(title)").extract()[0]
if speed_str:
speed = float(speed_str.split("秒")[0])
all_text = tr.css("td::text").extract()
ip = all_text[0]
port = all_text[1]
proxy_type = all_text[5]
ip_list.append((ip,port,proxy_type,speed))
for ip_info in ip_list:
cursor.execute(
"insert proxy_ip(ip,port,speed,proxy_type) VALUES('{0}','{1}','{2}','HTTP')".format
(
ip_info[0],ip_info[1],ip_info[3]
)
)
conn.commit()
class GetIP(object):
def delete_ip(self,ip):
delete_sql ="""
delete from proxy_ip where ip = '{0}'
""" .format(ip)
cursor.execute(delete_sql)
conn.commit()
return True
def judge_ip(self, ip, port):
http_url = "http://www.baidu.com"
proxy_url = "https://{0}:{1}".format(ip, port)
try:
proxy_dict = {
"https": proxy_url,
}
response = requests.get(http_url, proxies=proxy_dict)
except Exception as e:
print("invalid ip and port")
self.delete_ip(ip)
return False
else:
code = response.status_code
if code >= 200 and code < 300:
print("effective ip")
return True
else:
print("invalid ip and port")
self.delete_ip(ip)
return False
def get_random_ip(self):
random_sql = """
SELECT ip,port FROM proxy_ip
ORDER BY RAND()
LIMIT 1
"""
result = cursor.execute(random_sql)
for ip_info in cursor.fetchall():
ip = ip_info[0]
port = ip_info[1]
judge_re = self.judge_ip(ip,port)
if judge_re:
return "http://{0}:{1}".format(ip, port)
else:
return self.get_random_ip()
if __name__ == "__main__":
get_ip = GetIP()
get_ip.get_random_ip()