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import six
import requests.adapters
import socket
from six.moves import http_client as httplib
from docker.transport.basehttpadapter import BaseHTTPAdapter
from .. import constants
try:
import requests.packages.urllib3 as urllib3
except ImportError:
import urllib3
RecentlyUsedContainer = urllib3._collections.RecentlyUsedContainer
class UnixHTTPResponse(httplib.HTTPResponse, object):
def __init__(self, sock, *args, **kwargs):
disable_buffering = kwargs.pop('disable_buffering', False)
if six.PY2:
# FIXME: We may need to disable buffering on Py3 as well,
# but there's no clear way to do it at the moment. See:
# https://github.com/docker/docker-py/issues/1799
kwargs['buffering'] = not disable_buffering
super(UnixHTTPResponse, self).__init__(sock, *args, **kwargs)
class UnixHTTPConnection(httplib.HTTPConnection, object):
def __init__(self, base_url, unix_socket, timeout=60):
super(UnixHTTPConnection, self).__init__(
'localhost', timeout=timeout
)
self.base_url = base_url
self.unix_socket = unix_socket
self.timeout = timeout
self.disable_buffering = False
def connect(self):
sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
sock.settimeout(self.timeout)
sock.connect(self.unix_socket)
self.sock = sock
def putheader(self, header, *values):
super(UnixHTTPConnection, self).putheader(header, *values)
if header == 'Connection' and 'Upgrade' in values:
self.disable_buffering = True
def response_class(self, sock, *args, **kwargs):
if self.disable_buffering:
kwargs['disable_buffering'] = True
return UnixHTTPResponse(sock, *args, **kwargs)
class UnixHTTPConnectionPool(urllib3.connectionpool.HTTPConnectionPool):
def __init__(self, base_url, socket_path, timeout=60, maxsize=10):
super(UnixHTTPConnectionPool, self).__init__(
'localhost', timeout=timeout, maxsize=maxsize
)
self.base_url = base_url
self.socket_path = socket_path
self.timeout = timeout
def _new_conn(self):
return UnixHTTPConnection(
self.base_url, self.socket_path, self.timeout
)
class UnixHTTPAdapter(BaseHTTPAdapter):
__attrs__ = requests.adapters.HTTPAdapter.__attrs__ + ['pools',
'socket_path',
'timeout']
def __init__(self, socket_url, timeout=60,
pool_connections=constants.DEFAULT_NUM_POOLS):
socket_path = socket_url.replace('http+unix://', '')
if not socket_path.startswith('/'):
socket_path = '/' + socket_path
self.socket_path = socket_path
self.timeout = timeout
self.pools = RecentlyUsedContainer(
pool_connections, dispose_func=lambda p: p.close()
)
super(UnixHTTPAdapter, self).__init__()
def get_connection(self, url, proxies=None):
with self.pools.lock:
pool = self.pools.get(url)
if pool:
return pool
pool = UnixHTTPConnectionPool(
url, self.socket_path, self.timeout
)
self.pools[url] = pool
return pool
def request_url(self, request, proxies):
# The select_proxy utility in requests errors out when the provided URL
# doesn't have a hostname, like is the case when using a UNIX socket.
# Since proxies are an irrelevant notion in the case of UNIX sockets
# anyway, we simply return the path URL directly.
# See also: https://github.com/docker/docker-py/issues/811
return request.path_url
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