def gethostbyname(hostname):
""":func:`socket.gethostbyname` implemented using :mod:`gevent.dns`.
Differs in the following ways:
* raises :class:`DNSError` (a subclass of :class:`socket.gaierror`) with dns error
codes instead of standard socket error codes
* does not support ``/etc/hosts`` but calls the original :func:`socket.gethostbyname`
if *hostname* has no dots
* does not iterate through all addresses, instead picks a random one each time
"""
# TODO: this is supposed to iterate through all the addresses
# could use a global dict(hostname, iter)
# - fix these nasty hacks for localhost, ips, etc.
if not isinstance(hostname, str) or '.' not in hostname:
return _socket.gethostbyname(hostname)
if _ip4_re.match(hostname):
return hostname
if hostname == _socket.gethostname():
return _socket.gethostbyname(hostname)
addrs = None
try:
_ttl, addrs = resolve_ipv4(hostname)
except:
_ttl, addrs = resolve_ipv6(hostname)
return inet_ntop(AF_INET6, random.choice(addrs))
else:
return inet_ntop(AF_INET, random.choice(addrs))
def gethostbyname(hostname):
""":func:`socket.gethostbyname` implemented using :mod:`gevent.dns`.
Differs in the following ways:
* raises :class:`DNSError` (a subclass of :class:`socket.gaierror`) with dns error
codes instead of standard socket error codes
* does not support ``/etc/hosts`` but calls the original :func:`socket.gethostbyname`
if *hostname* has no dots
* does not iterate through all addresses, instead picks a random one each time
"""
# TODO: this is supposed to iterate through all the addresses
# could use a global dict(hostname, iter)
# - fix these nasty hacks for localhost, ips, etc.
if not isinstance(hostname, str) or '.' not in hostname:
return _socket.gethostbyname(hostname)
if _ip4_re.match(hostname):
return hostname
if hostname == _socket.gethostname():
return _socket.gethostbyname(hostname)
addrs = None
try:
_ttl, addrs = resolve_ipv4(hostname)
except:
_ttl, addrs = resolve_ipv6(hostname)
return inet_ntop(AF_INET6, random.choice(addrs))
else:
return inet_ntop(AF_INET, random.choice(addrs))
def getaddrinfo(host, port, *args, **kwargs):
"""*Some* approximation of :func:`socket.getaddrinfo` implemented using :mod:`gevent.dns`.
If *host* is not a string, does not has any dots or is a numeric IP address, then
the standard :func:`socket.getaddrinfo` is called.
Otherwise, calls either :func:`resolve_ipv4` or :func:`resolve_ipv6` and
formats the result the way :func:`socket.getaddrinfo` does it.
Differs in the following ways:
* raises :class:`DNSError` (a subclass of :class:`gaierror`) with libevent-dns error
codes instead of standard socket error codes
* IPv6 support is untested.
* AF_UNSPEC only tries IPv4
* only supports TCP, UDP, IP protocols
* port must be numeric, does not support string service names. see socket.getservbyname
* *flags* argument is ignored
Additionally, supports *evdns_flags* keyword arguments (default ``0``) that is passed
to :mod:`dns` functions.
"""
family, socktype, proto, _flags = args + (None, ) * (4 - len(args))
if not isinstance(host, str) or '.' not in host or _ip4_re.match(host):
return _socket.getaddrinfo(host, port, *args)
evdns_flags = kwargs.pop('evdns_flags', 0)
if kwargs:
raise TypeError('Unsupported keyword arguments: %s' %
(kwargs.keys(), ))
if family in (None, AF_INET, AF_UNSPEC):
family = AF_INET
# TODO: AF_UNSPEC means try both AF_INET and AF_INET6
_ttl, addrs = resolve_ipv4(host, evdns_flags)
elif family == AF_INET6:
_ttl, addrs = resolve_ipv6(host, evdns_flags)
else:
raise NotImplementedError(
'family is not among AF_UNSPEC/AF_INET/AF_INET6: %r' %
(family, ))
socktype_proto = [(SOCK_STREAM, 6), (SOCK_DGRAM, 17), (SOCK_RAW, 0)]
if socktype is not None:
socktype_proto = [(x, y) for (x, y) in socktype_proto
if socktype == x]
if proto is not None:
socktype_proto = [(x, y) for (x, y) in socktype_proto
if proto == y]
result = []
for addr in addrs:
for socktype, proto in socktype_proto:
result.append(
(family, socktype, proto, '', (inet_ntop(family,
addr), port)))
return result
def getaddrinfo(host, port, *args, **kwargs):
"""*Some* approximation of :func:`socket.getaddrinfo` implemented using :mod:`gevent.dns`.
If *host* is not a string, does not has any dots or is a numeric IP address, then
the standard :func:`socket.getaddrinfo` is called.
Otherwise, calls either :func:`resolve_ipv4` or :func:`resolve_ipv6` and
formats the result the way :func:`socket.getaddrinfo` does it.
Differs in the following ways:
* raises :class:`DNSError` (a subclass of :class:`gaierror`) with libevent-dns error
codes instead of standard socket error codes
* IPv6 support is untested.
* AF_UNSPEC only tries IPv4
* only supports TCP, UDP, IP protocols
* port must be numeric, does not support string service names. see socket.getservbyname
* *flags* argument is ignored
Additionally, supports *evdns_flags* keyword arguments (default ``0``) that is passed
to :mod:`dns` functions.
"""
family, socktype, proto, _flags = args + (None, ) * (4 - len(args))
if isinstance(host, unicode):
host = host.encode('idna')
if not isinstance(host, str) or '.' not in host or _ip4_re.match(host):
return _socket.getaddrinfo(host, port, *args)
evdns_flags = kwargs.pop('evdns_flags', 0)
if kwargs:
raise TypeError('Unsupported keyword arguments: %s' % (kwargs.keys(), ))
if family in (None, AF_INET, AF_UNSPEC):
family = AF_INET
# TODO: AF_UNSPEC means try both AF_INET and AF_INET6
_ttl, addrs = resolve_ipv4(host, evdns_flags)
elif family == AF_INET6:
_ttl, addrs = resolve_ipv6(host, evdns_flags)
else:
raise NotImplementedError('family is not among AF_UNSPEC/AF_INET/AF_INET6: %r' % (family, ))
socktype_proto = [(SOCK_STREAM, 6), (SOCK_DGRAM, 17), (SOCK_RAW, 0)]
if socktype:
socktype_proto = [(x, y) for (x, y) in socktype_proto if socktype == x]
if proto:
socktype_proto = [(x, y) for (x, y) in socktype_proto if proto == y]
result = []
for addr in addrs:
for socktype, proto in socktype_proto:
result.append((family, socktype, proto, '', (inet_ntop(family, addr), port)))
return result
if socktype:
socktype_proto = [(x, y) for (x, y) in socktype_proto
if socktype == x]
if proto:
socktype_proto = [(x, y) for (x, y) in socktype_proto
if proto == y]
result = []
if family == AF_INET:
for res in resolve_ipv4(host, evdns_flags)[1]:
sockaddr = (inet_ntop(family, res), port)
for socktype, proto in socktype_proto:
result.append((family, socktype, proto, '', sockaddr))
elif family == AF_INET6:
for res in resolve_ipv6(host, evdns_flags)[1]:
sockaddr = (inet_ntop(family, res), port, 0, 0)
for socktype, proto in socktype_proto:
result.append((family, socktype, proto, '', sockaddr))
else:
ipv4_res = None
ipv6_res = None
try:
ipv4_res = resolve_ipv4(host, evdns_flags)[1]
except:
pass
if not ipv4_res:
ipv4_res = None
ipv6_res = resolve_ipv6(host, evdns_flags)[1]
socktype_proto = [(SOCK_STREAM, 6), (SOCK_DGRAM, 17), (SOCK_RAW, 0)]
if socktype:
socktype_proto = [(x, y) for (x, y) in socktype_proto if socktype == x]
if proto:
socktype_proto = [(x, y) for (x, y) in socktype_proto if proto == y]
result = []
if family == AF_INET:
for res in resolve_ipv4(host, evdns_flags)[1]:
sockaddr = (inet_ntop(family, res), port)
for socktype, proto in socktype_proto:
result.append((family, socktype, proto, '', sockaddr))
elif family == AF_INET6:
for res in resolve_ipv6(host, evdns_flags)[1]:
sockaddr = (inet_ntop(family, res), port, 0, 0)
for socktype, proto in socktype_proto:
result.append((family, socktype, proto, '', sockaddr))
else:
failure = None
job = spawn(wrap_errors(gaierror, resolve_ipv6), host, evdns_flags)
try:
try:
ipv4_res = resolve_ipv4(host, evdns_flags)[1]
except gaierror, failure:
ipv4_res = None
ipv6_res = job.get()
if isinstance(ipv6_res, gaierror):
ipv6_res = None
if failure is not None:
