爬虫.requests.exceptions.ConnectionErro

requests.exceptions.ConnectionError: HTTPConnectionPool(host='jy-qj.com.cn', port=80): Max retries exceeded with url: / (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x00000000032ED358>: Failed to establish a new connection: [Errno 11004] getaddrinfo failed',))

今天爬例58二手大概30万的二手url，到下午打时候，突然发现报错了，谷歌了一下，需要在requests的时候，加上timeout，尝试例一下，依然在报错。

进入debug模式，代码如下

from bs4 import BeautifulSoup
import requests

# 拿到58同城二手市场的列表页
start_url='http://cd.58.com/sale.shtml'
url_host='http://cd.58.com'

def get_index_url(url):
    try:
            wb_data = requests.get(url)
            print(wb_data)
            soup = BeautifulSoup(wb_data.text, 'lxml')
            links = soup.select('#ymenu-side > ul > li > span.dlb > a')
            for link in links:
                page_url = url_host + link.get('href','')
                print(page_url)
    except requests.exceptions.ConnectionError as e :
        None

get_index_url(start_url)

channel_list='''
    http://cd.58.com/shouji/
    http://cd.58.com/tongxunyw/
    http://cd.58.com/danche/
    http://cd.58.com/diandongche/
    http://cd.58.com/diannao/
    http://cd.58.com/shuma/
    http://cd.58.com/jiadian/
    http://cd.58.com/ershoujiaju/
    http://cd.58.com/yingyou/
    http://cd.58.com/fushi/
    http://cd.58.com/meirong/
    http://cd.58.com/yishu/
    http://cd.58.com/tushu/
    http://cd.58.com/wenti/
    http://cd.58.com/bangong/
    http://cd.58.com/shebei.shtml
    http://cd.58.com/chengren/

'''

发现域名都没解析，使用try，except 判断，直接输出None

感觉有点想端口被占用，然后再重开一个 ceshi.py python文件

from bs4 import BeautifulSoup
import requests


url='http://www.baidu.com'
a=requests.get(url)
print(a)

输出依然是requests.exceptions.ConnectionErro，，

这个时候打开终端，查看80端口，，，，命令行调试　　　　netstat -an|grep 80

显示

root@kk-HP-450-Notebook-PC:/home/kk# netstat -an |grep :80

• tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
• tcp 0 0 0.0.0.0:8099 0.0.0.0:* LISTEN
• tcp 0 0 192.168.0.116:46340 203.208.39.218:80 ESTABLISHED
• tcp 0 0 192.168.0.116:55916 203.208.51.80:80 ESTABLISHED
• tcp 0 0 192.168.0.116:60568 203.208.39.242:80 ESTABLISHED
• tcp 1 1 192.168.0.116:49790 117.174.144.48:80 LAST_ACK
• tcp 0 0 192.168.0.116:56002 203.208.51.89:80 ESTABLISHED
• tcp 1 1 192.168.0.116:36678 183.232.231.117:80 LAST_ACK
• tcp 0 0 192.168.0.116:51214 42.159.236.181:80 TIME_WAIT
• tcp 0 0 192.168.0.116:36000 203.208.39.252:80 ESTABLISHED
• tcp 0 0 192.168.0.116:60844 203.208.51.82:80 ESTABLISHED
• tcp 0 0 192.168.0.116:56086 203.208.51.89:80 ESTABLISHED
• tcp 1 1 192.168.0.116:53838 111.13.101.191:80 LAST_ACK
• tcp 0 0 192.168.0.116:56090 203.208.51.89:80 ESTABLISHED
• tcp 0 0 192.168.0.116:60846 203.208.51.82:80 ESTABLISHED
• tcp 0 0 192.168.0.116:46276 203.208.39.218:80 ESTABLISHED
• tcp 0 0 192.168.0.116:54686 203.208.51.58:80 ESTABLISHED
• tcp 0 0 192.168.0.116:39776 203.208.43.109:80 ESTABLISHED
• tcp 0 0 192.168.0.116:46334 203.208.39.218:80 ESTABLISHED
• tcp 1 1 192.168.0.116:49796 117.174.144.48:80 LAST_ACK
• tcp 1 1 192.168.0.116:53258 180.97.104.146:80 LAST_ACK
• tcp 0 0 192.168.0.116:38318 203.208.39.225:80 ESTABLISHED
• tcp 0 0 192.168.0.116:46232 203.208.43.91:80 ESTABLISHED
• tcp 0 0 192.168.0.116:56088 203.208.51.89:80 ESTABLISHED
• tcp 0 0 192.168.0.116:46302 203.208.39.218:80 ESTABLISHED
• tcp 0 0 192.168.0.116:39772 203.208.43.109:80 ESTABLISHED
• tcp 0 0 192.168.0.116:43920 203.208.51.45:80 ESTABLISHED
• tcp 0 0 192.168.0.116:43922 203.208.51.45:80 ESTABLISHED
• tcp 0 1 192.168.0.116:44452 111.202.114.35:80 FIN_WAIT1
• tcp 0 0 192.168.0.116:58922 203.208.51.81:80 ESTABLISHED
• tcp 0 0 192.168.0.116:55918 203.208.51.80:80 ESTABLISHED
• tcp6 0 0 :::80 :::* LISTEN

　　

》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》》在通过　

lsof -i:80

kill pid

然后重启pycharm  重启一下网络的连接

运行 ceshi.py

返回　　<Response [200]>