I created a TCP server program (see server.py) to access the terminal of another computer (see client.py). When I use the client and server locally (only on my computer) everything is fine, however when the client is sending a request from a different computer, I receive this message on the client side :
Traceback (most recent call last):
File "client.py", line 11, in <module>
client.connect((serverIP, serverPort))
File "/usr/lib/python2.7/socket.py", line 228, in meth
return getattr(self._sock,name)(*args)
socket.error: [Errno 111] Connection refused
Note : the server is the computer which is being accessed by the client.
'Connection refused' means there was nothing listening at the IP:port you tried to connect to.
It comes from the target system, which means that the connection request got there and the refusal came back, so it isn't a firewall issue.
Solved it. I had to use the IP given to in when running ifconfig (192.168.1.***). I was binding to localhost, and thus I could not connect to the server remotely.
Related
I have flask/python app that I am running from my virtual desktop using flask run command. It used to run fine with below command.
flask run -h (ip address) -p 8000
But recently I am getting below error.
Traceback (most recent call last):
File "C:\ProgramData\Anaconda2\lib\SocketServer.py", line 431, in server_bind
self.socket.bind(self.server_address)
File "C:\ProgramData\Anaconda2\lib\socket.py", line 228, in meth
return getattr(self._sock,name)(*args)
socket.gaierror: [Errno 11001] getaddrinfo failed
I am able to connect to localhost - 127.0.0.1. But, I am getting above error when I connect to IP address.
I want everyone to be able to open this app on their own system. For this, app should be hosted on IP address. On localhost(127.0.0.1), only my system can open it.
I am running this on company laptop, hence there could also be a firewall involved in this.
Can someone please help me resolve this issue.
getaddrinfo failed means the hostname can't be resolved, maybe the -h (ip address) is wrong, please add the full command you use to start the application.
Generally in production the -h parameter is 0.0.0.0 (to allow all clients to communicate with your server), so your command should be:
flask run -h '0.0.0.0' -p 8000
I tried to run a demo of TensorFlow.The MNIST dataset has been download,but there exists one error. Who can tell me what's wrong? Thanks very much! The error detail as follows:
Extracting MNIST_data/train-images-idx3-ubyte.gz
Extracting MNIST_data/train-labels-idx1-ubyte.gz
Traceback (most recent call last):
File "/home/linbinghui/文档/pycode/my_tensorflow_code/test_mnist.py", line 7, in <module>
mnist = input_data.read_data_sets("MNIST_data/", one_hot=False)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/contrib/learn/python/learn/datasets/mnist.py", line 189, in read_data_sets
local_file = maybe_download(TEST_IMAGES, train_dir, SOURCE_URL + TEST_IMAGES)
File "/usr/local/lib/python2.7/dist-packages/tensorflow/contrib/learn/python/learn/datasets/base.py", line 81, in maybe_download
urllib.request.urlretrieve(source_url, temp_file_name)
File "/usr/lib/python2.7/urllib.py", line 98, in urlretrieve
return opener.retrieve(url, filename, reporthook, data)
File "/usr/lib/python2.7/urllib.py", line 245, in retrieve
fp = self.open(url, data)
return getattr(self, name)(url)
File "/usr/lib/python2.7/urllib.py", line 350, in open_http
h.endheaders(data)
File "/usr/lib/python2.7/httplib.py", line 1053, in endheaders
self._send_output(message_body)
File "/usr/lib/python2.7/httplib.py", line 897, in _send_output
self.send(msg)
File "/usr/lib/python2.7/httplib.py", line 859, in send
self.connect()
File "/usr/lib/python2.7/httplib.py", line 836, in connect
self.timeout, self.source_address)
File "/usr/lib/python2.7/socket.py", line 575, in create_connection
raise err
IOError: [Errno socket error] [Errno 111] Connection refused
This code is attempting to download https://storage.googleapis.com/cvdf-datasets/mnist/t10k-images-idx3-ubyte.gz and failing. It failed because of "Connection Refused" which generally indicates that the remote end is not running a server on the port you tried to contact it on.
This URL refers a Google storage service. I was able to successfully download this file. Either you encountered a transient failure of Google's service, or some intermediary between you and Google caused this problem.
Normally "connection refused" is not caused by anything other than the intended remote end being unavailable (there's a computer there but no specific service). However, in the face of modern HTTP and HTTPS proxies, DNS redirection and the like, you could very well have encountered some feature of your business/school/home/government internet interdiction. HTTPS urls can be troubling to the entity hosting your internet service because it represents a private communication channel through which you could download malware or upload secrets. This troubling nature makes it more likely to be intercepted or redirected or disabled entirely.
I recommend that you troubleshoot this problem with wget/curl or similar on your machine. If those work well, consider a small python script with the requests package. Consider also the impact of environment variables on these utilities/libraries. Try repeating this procedure at network endpoints other than the one you're using.
If you find that the results of repeated tests are unstable even in the same network endpoint, perhaps you're facing local load balancers/proxies or some other transient local failure. When in doubt, contact your local network support team.
I tried to run a simple code to extract data from Instagram using Python-Instagram module
The code is
from instagram.client import InstagramAPI
api = InstagramAPI(client_id='YOUR_CLIENT_ID',client_secret='YOUR_CLIENT_SECRET')
popular_media = api.media_popular(count=20)
I am getting a Connection refused error at the last lineline. Its because Python-Instagram module uses httplib2 module also. The error looks like this.
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/anaconda/lib/python2.7/site-packages/httplib2-0.9-py2.7.egg/httplib2/__init__.py", line 1060, in connect
raise socket.error, msg
socket.error: [Errno 111] Connection refused
How to resolve this? Do I have to provide any connection specifications for using this module?
I am a newbie to Docker and this is what I am trying out.
I have a Windows machine on which I have installed Docker using Virtual Box as per this link. I have built a base Ubuntu Image. Now in the Windows Machine I have a Rest Service running that has to be accessed by the docker container. I am accessing it via Python Requests module. What IP should I give to the requests module's get method?
I have tried following
r = requests.get('http://172.17.42.1:8090/app/rest/names');
and
r = requests.get('http://172.17.0.2:8090/app/rest/names');
172.17.0.2 is the IP of Docker Container and 172.17.42.1 is the Bridge IP.
In both cases the error is Connection Refused
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/dist-packages/requests/api.py", line 55, in get
return request('get', url, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/api.py", line 44, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 383, in reques
t
resp = self.send(prep, **send_kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/sessions.py", line 486, in send
r = adapter.send(request, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/requests/adapters.py", line 378, in send
raise ConnectionError(e)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='172.17.0.2', port=8090): Ma
x retries exceeded with url: /app/rest/names(Caused by <class 'socket.error'>:
[Errno 111] Connection refused)
However I can access a public URL available.
The bridge IP address should work. If it doesn't, it might be because the application on the Windows machine is not listening on all IP addresses, or maybe there is some kind of firewalling.
You can check that the application is listening on the right port (and on all addresses!) with netstat -a -n -o (on the Windows machine), as explained here.
Maybe the Windows machine is only listening on 127.0.0.1 …?
I am doing a simple server/client connection using multiprocessing in python 2.7.
When I run the client code in a seperate python shell, the connection is successful, but when I run the application as a whole, I get "socket.error: [Errno 111] Connection refused".
This is the Traceback:
Traceback (most recent call last):
File "./kaboom", line 276, in <module>
sequence.run(testEnv)
File "/e/m/amoreau/test_edit/kaboom/src/kbmSequence.py", line 271, in run
if testEnv.open() != SUCCESS:
File "/e/m/amoreau/test_edit/kaboom/src/kbmTestEnv.py", line 518, in open
queueManager = resultsClient.QueueServerClient()
File "/e/m/amoreau/test_edit/kaboom/resultsClient.py", line 15, in QueueServerClient
manager.connect()
File "/usr/lib64/python2.6/multiprocessing/managers.py", line 474, in connect
conn = Client(self._address, authkey=self._authkey)
File "/usr/lib64/python2.6/multiprocessing/connection.py", line 143, in Client
c = SocketClient(address)
File "/usr/lib64/python2.6/multiprocessing/connection.py", line 263, in SocketClient
s.connect(address)
File "<string>", line 1, in connect
socket.error: [Errno 111] Connection refused
Why does this happen? I have disabled all firewalls.
Howdie, I just had this problem. I know this is an old answer, but I found the answer in a related question. It's listed below. The issue is that the client is attempting to connect to the server before the server has created the socket.
Well, that's what it was in my case. Spawning the server off into another process takes a wee bit longer then the client attempting to connect. To test, I placed a sleep call in my client and sure enough, no more error.
Python Socket Error - Connection Refused