Hi, i try to do an HTTP POST request but I have an error with this line :

sock = socket.create_connection((conn.host, conn.port), conn.timeout, conn.source_address)

Error:

  File "/usr/local/lib/python2.7/dist-packages/odoo-9.0c-py2.7.egg/openerp/addons/Copa/purchase.py", line 191, in sendOrder
sock = socket.create_connection((conn.host, conn.port), conn.timeout, conn.source_address)
  File "/usr/lib/python2.7/socket.py", line 553, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
gaierror: [Errno -2] Name or service not known

I have no idea what is the problem, in advance, thanks for help.