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Requests超时重试测试
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‎test/test_request.py‎

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#!/usr/bin/env python
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# encoding: utf-8
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"""
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@author: zhanghe
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@software: PyCharm
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@file: test_request.py
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@time: 2017/4/26 上午9:55
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"""
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import requests
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import time
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def test_01():
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"""
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测试请求延时
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request start : 2017-04-26 10:05:56
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request response: 2017-04-26 10:06:06
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<Response [200]>
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process start:10:05:56
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process end :10:06:06
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:return:
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"""
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print 'request start :', time.strftime("%Y-%m-%d %H:%M:%S")
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res = requests.get('http://0:8899')
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print 'request response:', time.strftime("%Y-%m-%d %H:%M:%S")
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print res
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print res.text
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def test_02():
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"""
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测试响应超时
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request start : 2017-04-26 10:11:16
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HTTPConnectionPool(host='0', port=8899): Read timed out. (read timeout=2)
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request response: 2017-04-26 10:11:18
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:return:
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"""
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print 'request start :', time.strftime("%Y-%m-%d %H:%M:%S")
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try:
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res = requests.get('http://0:8899', timeout=2)
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print res
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print res.text
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except requests.exceptions.ReadTimeout as e:
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print u'响应超时', e.message
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print 'request response:', time.strftime("%Y-%m-%d %H:%M:%S")
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def test_03():
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"""
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测试连接失败
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request start : 2017-04-26 10:14:18
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HTTPConnectionPool(host='0', port=9999): Max retries exceeded with url: / (Caused by NewConnectionError('<requests.packages.urllib3.connection.HTTPConnection object at 0x103e6f510>: Failed to establish a new connection: [Errno 61] Connection refused',))
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request response: 2017-04-26 10:14:18
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:return:
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"""
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print 'request start :', time.strftime("%Y-%m-%d %H:%M:%S")
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try:
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res = requests.get('http://0:9999')
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print res
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print res.text
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# 连接错误
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except requests.exceptions.ConnectionError as e:
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print u'连接错误', e.message
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# 响应超时
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except requests.exceptions.ReadTimeout as e:
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print u'响应超时', e.message
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print 'request response:', time.strftime("%Y-%m-%d %H:%M:%S")
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def test_04():
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"""
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测试连接成功，无响应
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测试过程：
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开启监听：nc -l 9900
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测试请求
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断开监听
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测试结果：
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request start : 2017-04-26 11:24:12
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连接错误 ('Connection aborted.', error(54, 'Connection reset by peer'))
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request response: 2017-04-26 11:24:18
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:return:
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"""
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print 'request start :', time.strftime("%Y-%m-%d %H:%M:%S")
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try:
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res = requests.get('http://0:9900')
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print res
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print res.text
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# 连接错误
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except requests.exceptions.ConnectionError as e:
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print u'连接错误', e.message
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# 响应超时
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except requests.exceptions.ReadTimeout as e:
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print u'响应超时', e.message
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print 'request response:', time.strftime("%Y-%m-%d %H:%M:%S")
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def test_05():
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"""
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测试连接超时
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request start : 2017-04-26 11:36:20
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连接错误 HTTPConnectionPool(host='www.x.com', port=80): Max retries exceeded with url: / (Caused by ConnectTimeoutError(<requests.packages.urllib3.connection.HTTPConnection object at 0x1086d8750>, 'Connection to www.x.com timed out. (connect timeout=3)'))
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request response: 2017-04-26 11:36:23
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:return:
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"""
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print 'request start :', time.strftime("%Y-%m-%d %H:%M:%S")
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try:
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res = requests.get('http://www.x.com', timeout=(3, 5))
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print res
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print res.text
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# 连接错误
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except requests.exceptions.ConnectionError as e:
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print u'连接错误', e.message
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# 响应超时
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except requests.exceptions.ReadTimeout as e:
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print u'响应超时', e.message
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print 'request response:', time.strftime("%Y-%m-%d %H:%M:%S")
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def test_06():
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"""
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测试重试
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测试结果：
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request start : 2017-04-26 11:53:18
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连接错误 HTTPConnectionPool(host='www.x.com', port=80): Max retries exceeded with url: / (Caused by ConnectTimeoutError(<requests.packages.urllib3.connection.HTTPConnection object at 0x107691ed0>, 'Connection to www.x.com timed out. (connect timeout=3)'))
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request response: 2017-04-26 11:53:40
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结果分析：
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backoff_factor： 超时补偿（默认值0）sleep seconds：{backoff factor} * (2 ^ ({number of total retries} - 1))
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1、backoff_factor = 0.1
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(5+1)*3 + (2**(1-1) + 2**(2-1) + 2**(3-1) + 2**(4-1) + 2**(5-1))*0.1
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= 18 + 3.1
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= 21.1
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2、backoff_factor = 0
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request start : 2017-04-26 12:51:44
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连接错误 HTTPConnectionPool(host='www.x.com', port=80): Max retries exceeded with url: / (Caused by ConnectTimeoutError(<requests.packages.urllib3.connection.HTTPConnection object at 0x10bae0ed0>, 'Connection to www.x.com timed out. (connect timeout=3)'))
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request response: 2017-04-26 12:52:02
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(5+1)*3
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= 18
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:return:
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"""
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from requests.packages.urllib3.util.retry import Retry
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from requests.adapters import HTTPAdapter
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s = requests.Session()
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retries = Retry(total=5,
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backoff_factor=0.1,
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status_forcelist=[500, 502, 503, 504])
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s.mount('http://', HTTPAdapter(max_retries=retries))
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s.mount('https://', HTTPAdapter(max_retries=retries))
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print 'request start :', time.strftime("%Y-%m-%d %H:%M:%S")
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try:
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res = s.get('http://www.x.com', timeout=(3, 5))
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print res
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print res.text
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# 连接错误
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except requests.exceptions.ConnectionError as e:
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print u'连接错误', e.message
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# 响应超时
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except requests.exceptions.ReadTimeout as e:
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print u'响应超时', e.message
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print 'request response:', time.strftime("%Y-%m-%d %H:%M:%S")
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if __name__ == '__main__':
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# test_01()
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# test_02()
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# test_03()
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# test_04()
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# test_05()
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test_06()
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"""
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测试页面
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index.php
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<?php
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ini_set('date.timezone','Asia/Shanghai');
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//打印时间
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echo "process start:".date('h:i:s')."\n";
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//暂停 10 秒
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sleep(10);
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//打印时间
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echo "process end :".date('h:i:s');
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"""
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"""
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开启临时服务
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php -S 0:8899
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"""

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