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| author | Georg Brandl <georg@python.org> | 2013-04-14 08:59:04 (GMT) |
|---|---|---|
| committer | Georg Brandl <georg@python.org> | 2013-04-14 08:59:04 (GMT) |
| commit | a204636b9190b8e69fe39b86291c2ba69913e310 (patch) | |
| tree | 8dbde6f2cb57b63784423afe5ec5ba97787ac4a1 | |
| parent | 5f4b4ac73e172f486c0a50c1e78e20da9b727784 (diff) | |
| download | cpython-a204636b9190b8e69fe39b86291c2ba69913e310.zip cpython-a204636b9190b8e69fe39b86291c2ba69913e310.tar.gz cpython-a204636b9190b8e69fe39b86291c2ba69913e310.tar.bz2 | |
bind('') does not do the same as bind('localhost')
| -rw-r--r-- | Doc/howto/sockets.rst | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/Doc/howto/sockets.rst b/Doc/howto/sockets.rst index ca6528b..151e2c8 100644 --- a/Doc/howto/sockets.rst +++ b/Doc/howto/sockets.rst @@ -84,9 +84,11 @@ creates a "server socket":: serversocket.listen(5) A couple things to notice: we used ``socket.gethostname()`` so that the socket -would be visible to the outside world. If we had used ``s.bind(('', 80))`` or -``s.bind(('localhost', 80))`` or ``s.bind(('127.0.0.1', 80))`` we would still -have a "server" socket, but one that was only visible within the same machine. +would be visible to the outside world. If we had used ``s.bind(('localhost', +80))`` or ``s.bind(('127.0.0.1', 80))`` we would still have a "server" socket, +but one that was only visible within the same machine. ``s.bind(('', 80))`` +specifies that the socket is reachable by any address the machine happens to +have. A second thing to note: low number ports are usually reserved for "well known" services (HTTP, SNMP etc). If you're playing around, use a nice high number (4 |