def __init__(self, bindaddr, registry, dns_servers=None):
DatagramServer.__init__(self, bindaddr)
self._registry = registry
self._resolver = None
if dns_servers:
self._resolver = Resolver(servers=dns_servers,
timeout=DNS_RESOLVER_TIMEOUT,
tries=1)
def __init__(self, bindaddr, registry, dns_servers=None):
DatagramServer.__init__(self, bindaddr)
self._registry = registry
self._resolver = None
if dns_servers:
log.info("[namesrv] starting with failover resolver %s",
dns_servers)
self._resolver = Resolver(servers=dns_servers,
timeout=DNS_RESOLVER_TIMEOUT,
tries=1)
address = ('127.0.0.10', 53)
listener = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
try:
listener.bind(address)
except socket.error as ex:
if 'permission denied' in str(ex).lower():
sys.stderr.write(
'This test binds on port 53 and thus must be run as root.\n')
sys.exit(0)
raise
def reader():
while True:
print(listener.recvfrom(10000))
gevent.spawn(reader)
r = gevent.get_hub().resolver = Resolver(servers=['127.0.0.10'],
timeout=0.001,
tries=1)
try:
result = r.gethostbyname('www.google.com')
except socket.gaierror as ex:
if 'ARES_ETIMEOUT' not in str(ex):
raise
else:
raise AssertionError('Expected timeout, got %r' % (result, ))
text += ('\n%s failed with %s\n\n' % (
context,
getattr(type, '__name__', 'exception'),
))
try:
from UnityEngine import Debug
Debug.LogError(text)
except:
# f**k
pass
from gevent.resolver_ares import Resolver
hub = gevent.hub.get_hub()
hub.resolver = Resolver(hub=hub)
class UnityLogStream(object):
def write(self, data):
from UnityEngine import Debug
Debug.Log(data)
import logging
logging.basicConfig(stream=UnityLogStream())
logging.getLogger().setLevel(logging.ERROR)
class ExecutiveWrapper(object):
def __init__(self, executive, warpgate):
pool = get_hub().threadpool
pool.apply_async(f,(6,33),callback=g)
pool.apply_async(f,(2,22),callback=g)
gevent.sleep(10)
14.c-ares http://c-ares.haxx.se/docs.html
如何证明的确是异步呢:
#coding=utf8
import socket
import gevent
from gevent import get_hub
from gevent.resolver_ares import Resolver
r = get_hub().resolver = Resolver(servers=['8.8.8.8'])
def f(w):
print w,r.gethostbyname(w)
for w in ['www.google.com','www.baidu.com','www.apple.com']:
gevent.spawn(f,w)
gevent.sleep(6)
试着跑一遍你就知道了？
cares.ares_library_init(cares.ARES_LIB_INIT_ALL)
初始化ares库，其实只对windows平台做了处理，主要是为了加载iphlpapi.dll，在非windows平台可不调用。
如果调用一定要在c-ares任何函数之前调用。
cares.ares_library_cleanup()
sys.exit(0)
from gevent import socket
print(gevent.__file__)
address = ('', 7153)
listener = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
try:
listener.bind(address)
except socket.error as ex:
if ex.errno in (errno.EPERM, errno.EADDRNOTAVAIL) or 'permission denied' in str(ex).lower():
sys.stderr.write('This test binds on port a port that was already in use or not allowed.\n')
sys.exit(0)
raise
def reader():
while True:
print(listener.recvfrom(10000))
gevent.spawn(reader)
r = gevent.get_hub().resolver = Resolver(servers=['127.0.0.1'], timeout=0.001, tries=1, udp_port=address[-1])
try:
result = r.gethostbyname('www.google.com')
except socket.gaierror as ex:
if 'ARES_ETIMEOUT' not in str(ex):
raise
else:
raise AssertionError('Expected timeout, got %r' % (result, ))