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Editorial Team
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Asked: 2026-05-28T00:19:50+00:00

This is really a follow-up to my post about a Python oauth2 BaseHTTPServer conflicting

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This is really a follow-up to my post about a Python oauth2 BaseHTTPServer conflicting with SABNzbd+.

Basically, I have the following little script (which is used to create a local server listening for Google API oauth2 credentials):

import socket
import BaseHTTPServer
from oauth2client.tools import ClientRedirectServer, ClientRedirectHandler

port_number = 0
host_name = 'localhost'
for port_number in range(8080,10000):
    try:
        httpd = ClientRedirectServer((host_name, port_number),
                                   ClientRedirectHandler)
    except socket.error, e:
        print "socket error: " + str(e)
        pass
    else:
        print "The server is running on: port " + str(port_number)
        print "and host_name " + host_name
        httpd.serve_forever()
        break

On OS X, if I run this script twice, I get the expected results:

socket error: [Errno 48] Address already in use
The server is running on: port 8081
and host_name localhost

However, running the same script from different cmd windows in Win7, I can happily run 3 or 4 servers on the same port (8080) without throwing a socket error:

C:\>netstat -abn | Findstr 8080
TCP    127.0.0.1:8080    0.0.0.0:0    LISTENING
TCP    127.0.0.1:8080    0.0.0.0:0    LISTENING
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1 Answer

  1. Editorial Team

    Per Ned Deily’s comment, Windows doesn’t treat multiple sockets the same way other OS’s may.

    I think that the correct way to do this in windows (and the way that worked for me, and thus the answer I’ll choose) is to bind the port to 0 and let Windows handle it by itself. You can then get the used port number back with sock.getsockname()[1].

    For anyone else trying to do this with the Google oauth2client.tools, see the code I went with below:

    import socket
import BaseHTTPServer
from oauth2client.tools import ClientRedirectServer, ClientRedirectHandler

port_number = 0
host_name = 'localhost'
try:
    httpd = ClientRedirectServer((host_name, port_number), ClientRedirectHandler)
except socket.error, e:
    print "socket error: " + str(e)
else:
    print "The server is running on: port " + str(httpd.socket.getsockname()[1])
    print "and host_name " + host_name
    httpd.serve_forever()
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