以下是request.exceptions下的各种异常错误:
RequestException:
HTTPError(RequestException)
UnrewindableBodyError(RequestException)
RetryError(RequestException)
ConnectionError(RequestException) ProxyError(ConnectionError)
SSLError(ConnectionError)
ConnectTimeout(ConnectionError, Timeout)
Timeout(RequestException) ReadTimeout
URLRequired(RequestException)
TooManyRedirects(RequestException)
MissingSchema(RequestException, ValueError)
InvalidSchema(RequestException,ValueError)
InvalidURL(RequestException,ValueError)
InvalidHeader(RequestException,ValueError)
ChunkedEncodingError(RequestException)
StreamConsumedError(RequestException,TypeError)
ContentDecodingError(RequestException,BaseHTTPError)
在实际应用的过程中,我们可以把请求放在try下,把可能发生的异常用except获取:
while True: #一直循环,知道访问站点成功
try:
#以下except都是用来捕获当requests请求出现异常时,
# 通过捕获然后等待网络情况的变化,以此来保护程序的不间断运行
req = requests.get(company_url, headers = headers, timeout = 20)
break
except requests.exceptions.ConnectionError:
print('ConnectionError -- please wait 3 seconds')
time.sleep(3)
except requests.exceptions.ChunkedEncodingError:
print('ChunkedEncodingError -- please wait 3 seconds')
time.sleep(3)
except:
print('Unfortunitely -- An Unknow Error Happened, Please wait 3 seconds')
time.sleep(3)