Python-Requests close http connection

问题:

I was wondering, how do you close a connection with Requests (python-requests.org)?

With httplib it's HTTPConnection.close(), but how do I do the same with Requests?

Code is below:

    r = requests.post("https://stream.twitter.com/1/statuses/filter.json", data={'track':toTrack}, auth=('username', 'passwd'))

    for line in r.iter_lines():
        if line:
            self.mongo['db'].tweets.insert(json.loads(line))

Thanks in advance.

回答1:

As discussed here, there really isn't such a thing as an HTTP connection and what httplib refers to as the HTTPConnection is really the underlying TCP connection which doesn't really know much about your requests at all. Requests abstracts that away and you won't ever see it.

The newest version of Requests does in fact keep the TCP connection alive after your request.. If you do want your TCP connections to close, you can just configure the requests to not use keep-alive.

s = requests.session()
s.config['keep_alive'] = False

回答2:

I think a more reliable way of closing a connection is to tell the sever explicitly to close it in a way compliant with HTTP specification:

HTTP/1.1 defines the "close" connection option for the sender to signal that the connection will be closed after completion of the response. For example,

   Connection: close

in either the request or the response header fields indicates that the connection SHOULD NOT be considered `persistent' (section 8.1) after the current request/response is complete.

The Connection: close header is added to the actual request:

r = requests.post(url=url, data=body, headers={'Connection':'close'})

回答3:

On Requests 1.X, the connection is available on the response object:

r = requests.post("https://stream.twitter.com/1/statuses/filter.json",
                  data={'track': toTrack}, auth=('username', 'passwd'))

r.connection.close()

回答4:

I came to this question looking to solve the "too many open files" error, but I am using requests.session() in my code. A few searches later and I came up with an answer on the Python Requests Documentation which suggests to use the with block so that the session is closed even if there are unhandled exceptions:

with requests.Session() as s:
    s.get('http://google.com')

If you're not using Session you can actually do the same thing: http://docs.python-requests.org/en/master/api/#requests.Response.close

with requests.get('http://httpbin.org/get', stream=True) as r:
    # Do something

回答5:

please use response.close() to close to avoid "too many open files" error

for example:

r = requests.post("https://stream.twitter.com/1/statuses/filter.json", data={'track':toTrack}, auth=('username', 'passwd'))
....
r.close()

回答6:

this works for me:

res = requests.get(<url>, timeout=10).content
requests.session().close()