Python请求:连接到代理服务器时忽略异常和错误
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我用Python编写了第一个程序.
#This program casts votes in online poll using different proxy servers for each request.
#It works, but some proxy servers cause errors crashing the whole thing.
#To avoid that, I would like it to skip those servers and ignore the errors.
import requests
import time
#Votes to be cast
votes = 5
#Makes proxy list
f=open('proxy2.txt')
lines=f.read().splitlines()
f.close()
#Vote counter
i = 1
#Proxy list counter
j = 0
while (i<=votes):
#Tests and moves to next proxy if there was a problem.
try:
r = requests.get('http://www.google.com')
except requests.exceptions.RequestException:
j = j + 1
#Headers copied from my browser. Some of them cause errors. Could you tell me why?
headers = {
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
#'Accept-Encoding': 'gzip, deflate',
#'Accept-Language': 'pl-PL,pl;q=0.8,en-US;q=0.6,en;q=0.4',
#'Cache-Control': 'max-age=0',
#'Connection': 'keep-alive',
#'Content-Length': '101',
'Content-Type': 'application/x-www-form-urlencoded',
#'Host': 'www.mylomza.pl',
#'Origin': 'http://www.mylomza.pl',
#'Referer': 'http://www.mylomza.pl/home/lomza/item/11780-wybierz-miss-%C5%82ks-i-portalu-mylomzapl-video-i-foto.html',
#'Upgrade-Insecure-Requests': '1',
#'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36'
}
proxies = {
'http': 'http://'+lines[j] #31.207.0.99:3128
}
r = requests.get('http://www.mylomza.pl/home/lomza/item/11780-wybierz-miss-%C5%82ks-i-portalu-mylomzapl-video-i-foto.html', headers=headers, proxies=proxies, timeout=10)
#The funny part - form, that I have to post, requires some kind of ID and this is my way of getting it :P Feel free to suggest an alternative way.
userid = r.text[(22222-32):22222]
print('Voter', userid, 'registered.')
data = {
'voteid': '141',
'task_button': 'G?osuj',
'option': 'com_poll',
'task': 'vote',
'id': '25',
userid: '1'
}
r = requests.post('http://www.mylomza.pl/home/lomza/item/index.php', headers=headers, cookies=r.cookies, data=data, proxies=proxies, timeout=10)
print('Vote nr', i, 'cast from', lines[i])
i = i + 1
j = j + 1
time.sleep(1)
我需要使它处理异常和错误.
#Tests and moves to next proxy if there was a problem.
try:
r = requests.get('http://www.google.com')
except requests.exceptions.RequestException:
j = j + 1
除此之外,我可以使用另一种方式来实现这一目标:
#The funny part - form, that I have to post, requires some kind of ID and this is my way of getting it :P Feel free to suggest an alternative way.
userid = r.text[(22222-32):22222]
有时我的方法不起作用(下面的示例).第一次投票通过了,第二次投票没有通过,然后全都崩溃了.
Voter 53bf55490ebd07d9c190787c5c6ca44c registered.
Vote nr 1 cast from 111.23.6.161:80
Voter registered.
Vote nr 2 cast from 94.141.102.203:8080
Traceback (most recent call last):
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\site-packages\requests\packages\urllib3\connection.py", line 142, in _new_conn
(self.host, self.port), self.timeout, **extra_kw)
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\site-packages\requests\packages\urllib3\util\connection.py", line 91, in create_connection
raise err
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\site-packages\requests\packages\urllib3\util\connection.py", line 81, in create_connection
sock.connect(sa)
socket.timeout: timed out
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\site-packages\requests\packages\urllib3\connectionpool.py", line 578, in urlopen
chunked=chunked)
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\site-packages\requests\packages\urllib3\connectionpool.py", line 362, in _make_request
conn.request(method, url, **httplib_request_kw)
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\http\client.py", line 1083, in request
self._send_request(method, url, body, headers)
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\http\client.py", line 1128, in _send_request
self.endheaders(body)
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\http\client.py", line 1079, in endheaders
self._send_output(message_body)
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\http\client.py", line 911, in _send_output
self.send(msg)
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\http\client.py", line 854, in send
self.connect()
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\site-packages\requests\packages\urllib3\connection.py", line 167, in connect
conn = self._new_conn()
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\site-packages\requests\packages\urllib3\connection.py", line 147, in _new_conn
(self.host, self.timeout))
requests.packages.urllib3.exceptions.ConnectTimeoutError: (<requests.packages.urllib3.connection.HTTPConnection object at 0x03612730>, 'Connection to 94.141.102.203 timed out. (connect timeout=10)')
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\site-packages\requests\adapters.py", line 403, in send
timeout=timeout
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\site-packages\requests\packages\urllib3\connectionpool.py", line 623, in urlopen
_stacktrace=sys.exc_info()[2])
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\site-packages\requests\packages\urllib3\util\retry.py", line 281, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
requests.packages.urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='94.141.102.203', port=8080): Max retries exceeded with url: http://www.mylomza.pl/home/lomza/item/11780-wybierz-miss-%C5%82ks-i-portalu-mylomzapl-video-i-foto.html (Caused by ConnectTimeoutError(<requests.packages.urllib3.connection.HTTPConnection object at 0x03612730>, 'Connection to 94.141.102.203 timed out. (connect timeout=10)'))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\PollVoter.py", line 50, in <module>
r = requests.get('http://www.mylomza.pl/home/lomza/item/11780-wybierz-miss-%C5%82ks-i-portalu-mylomzapl-video-i-foto.html', headers=headers, proxies=proxies, timeout=10)
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\site-packages\requests\api.py", line 71, in get
return request('get', url, params=params, **kwargs)
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\site-packages\requests\api.py", line 57, in request
return session.request(method=method, url=url, **kwargs)
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\site-packages\requests\sessions.py", line 475, in request
resp = self.send(prep, **send_kwargs)
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\site-packages\requests\sessions.py", line 585, in send
r = adapter.send(request, **kwargs)
File "C:\Users\Adrian\AppData\Local\Programs\Python\Python35-32\lib\site-packages\requests\adapters.py", line 459, in send
raise ConnectTimeout(e, request=request)
requests.exceptions.ConnectTimeout: HTTPConnectionPool(host='94.141.102.203', port=8080): Max retries exceeded with url: http://www.mylomza.pl/home/lomza/item/11780-wybierz-miss-%C5%82ks-i-portalu-mylomzapl-video-i-foto.html (Caused by ConnectTimeoutError(<requests.packages.urllib3.connection.HTTPConnection object at 0x03612730>, 'Connection to 94.141.102.203 timed out. (connect timeout=10)'))
解决方法:
似乎您向服务器发送了太多请求,这就是为什么会收到其他错误(例如request.packages.urllib3.exceptions.MaxRetryError)的原因,因为服务器可能会限制给定数量的连接数时间.您可以尝试处理输出中列出的所有异常,也可以尝试减少对您请求的url的尝试.
[编辑]或者,如果您要蛮力处理所有错误和异常,请尝试以下方法
except:
j = j + 1
[编辑:]您可以尝试https:以及http:
[编辑]找到了:
If the remote server is very slow, you can tell Requests to wait forever for a response, by passing None as a timeout value and then retrieving a cup of coffee.
r = requests.get('https://github.com', timeout=None)
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