httpconnection: correctly handle redirects from http to https
Previously the connection cache for keepalives didn't keep track of
ssl. This meant that when we connected to an https server after that
same server via http, both on the default port, we'd incorrectly reuse
the non-https connection as the default port meant the connection
cache key was the same.
# httpconnection.py - urllib2 handler for new http support
#
# Copyright 2005, 2006, 2007, 2008 Matt Mackall <mpm@selenic.com>
# Copyright 2006, 2007 Alexis S. L. Carvalho <alexis@cecm.usp.br>
# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
# Copyright 2011 Google, Inc.
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
import logging
import socket
import urllib
import urllib2
import os
from mercurial import httpclient
from mercurial import sslutil
from mercurial import util
from mercurial.i18n import _
# moved here from url.py to avoid a cycle
class httpsendfile(object):
"""This is a wrapper around the objects returned by python's "open".
Its purpose is to send file-like objects via HTTP and, to do so, it
defines a __len__ attribute to feed the Content-Length header.
"""
def __init__(self, ui, *args, **kwargs):
# We can't just "self._data = open(*args, **kwargs)" here because there
# is an "open" function defined in this module that shadows the global
# one
self.ui = ui
self._data = open(*args, **kwargs)
self.seek = self._data.seek
self.close = self._data.close
self.write = self._data.write
self._len = os.fstat(self._data.fileno()).st_size
self._pos = 0
self._total = len(self) / 1024 * 2
def read(self, *args, **kwargs):
try:
ret = self._data.read(*args, **kwargs)
except EOFError:
self.ui.progress(_('sending'), None)
self._pos += len(ret)
# We pass double the max for total because we currently have
# to send the bundle twice in the case of a server that
# requires authentication. Since we can't know until we try
# once whether authentication will be required, just lie to
# the user and maybe the push succeeds suddenly at 50%.
self.ui.progress(_('sending'), self._pos / 1024,
unit=_('kb'), total=self._total)
return ret
def __len__(self):
return self._len
# moved here from url.py to avoid a cycle
def readauthforuri(ui, uri):
# Read configuration
config = dict()
for key, val in ui.configitems('auth'):
if '.' not in key:
ui.warn(_("ignoring invalid [auth] key '%s'\n") % key)
continue
group, setting = key.rsplit('.', 1)
gdict = config.setdefault(group, dict())
if setting in ('username', 'cert', 'key'):
val = util.expandpath(val)
gdict[setting] = val
# Find the best match
scheme, hostpath = uri.split('://', 1)
bestlen = 0
bestauth = None
for group, auth in config.iteritems():
prefix = auth.get('prefix')
if not prefix:
continue
p = prefix.split('://', 1)
if len(p) > 1:
schemes, prefix = [p[0]], p[1]
else:
schemes = (auth.get('schemes') or 'https').split()
if (prefix == '*' or hostpath.startswith(prefix)) and \
len(prefix) > bestlen and scheme in schemes:
bestlen = len(prefix)
bestauth = group, auth
return bestauth
# Mercurial (at least until we can remove the old codepath) requires
# that the http response object be sufficiently file-like, so we
# provide a close() method here.
class HTTPResponse(httpclient.HTTPResponse):
def close(self):
pass
class HTTPConnection(httpclient.HTTPConnection):
response_class = HTTPResponse
def request(self, method, uri, body=None, headers={}):
if isinstance(body, httpsendfile):
body.seek(0)
httpclient.HTTPConnection.request(self, method, uri, body=body,
headers=headers)
_configuredlogging = False
# Subclass BOTH of these because otherwise urllib2 "helpfully"
# reinserts them since it notices we don't include any subclasses of
# them.
class http2handler(urllib2.HTTPHandler, urllib2.HTTPSHandler):
def __init__(self, ui, pwmgr):
global _configuredlogging
urllib2.AbstractHTTPHandler.__init__(self)
self.ui = ui
self.pwmgr = pwmgr
self._connections = {}
loglevel = ui.config('ui', 'http2debuglevel', default=None)
if loglevel and not _configuredlogging:
_configuredlogging = True
logger = logging.getLogger('mercurial.httpclient')
logger.setLevel(getattr(logging, loglevel.upper()))
logger.addHandler(logging.StreamHandler())
def close_all(self):
"""Close and remove all connection objects being kept for reuse."""
for openconns in self._connections.values():
for conn in openconns:
conn.close()
self._connections = {}
# shamelessly borrowed from urllib2.AbstractHTTPHandler
def do_open(self, http_class, req, use_ssl):
"""Return an addinfourl object for the request, using http_class.
http_class must implement the HTTPConnection API from httplib.
The addinfourl return value is a file-like object. It also
has methods and attributes including:
- info(): return a mimetools.Message object for the headers
- geturl(): return the original request URL
- code: HTTP status code
"""
# If using a proxy, the host returned by get_host() is
# actually the proxy. On Python 2.6.1, the real destination
# hostname is encoded in the URI in the urllib2 request
# object. On Python 2.6.5, it's stored in the _tunnel_host
# attribute which has no accessor.
tunhost = getattr(req, '_tunnel_host', None)
host = req.get_host()
if tunhost:
proxyhost = host
host = tunhost
elif req.has_proxy():
proxyhost = req.get_host()
host = req.get_selector().split('://', 1)[1].split('/', 1)[0]
else:
proxyhost = None
if proxyhost:
if ':' in proxyhost:
# Note: this means we'll explode if we try and use an
# IPv6 http proxy. This isn't a regression, so we
# won't worry about it for now.
proxyhost, proxyport = proxyhost.rsplit(':', 1)
else:
proxyport = 3128 # squid default
proxy = (proxyhost, proxyport)
else:
proxy = None
if not host:
raise urllib2.URLError('no host given')
connkey = use_ssl, host, proxy
allconns = self._connections.get(connkey, [])
conns = [c for c in allconns if not c.busy()]
if conns:
h = conns[0]
else:
if allconns:
self.ui.debug('all connections for %s busy, making a new '
'one\n' % host)
timeout = None
if req.timeout is not socket._GLOBAL_DEFAULT_TIMEOUT:
timeout = req.timeout
h = http_class(host, timeout=timeout, proxy_hostport=proxy)
self._connections.setdefault(connkey, []).append(h)
headers = dict(req.headers)
headers.update(req.unredirected_hdrs)
headers = dict(
(name.title(), val) for name, val in headers.items())
try:
path = req.get_selector()
if '://' in path:
path = path.split('://', 1)[1].split('/', 1)[1]
if path[0] != '/':
path = '/' + path
h.request(req.get_method(), path, req.data, headers)
r = h.getresponse()
except socket.error, err: # XXX what error?
raise urllib2.URLError(err)
# Pick apart the HTTPResponse object to get the addinfourl
# object initialized properly.
r.recv = r.read
resp = urllib.addinfourl(r, r.headers, req.get_full_url())
resp.code = r.status
resp.msg = r.reason
return resp
# httplib always uses the given host/port as the socket connect
# target, and then allows full URIs in the request path, which it
# then observes and treats as a signal to do proxying instead.
def http_open(self, req):
if req.get_full_url().startswith('https'):
return self.https_open(req)
return self.do_open(HTTPConnection, req, False)
def https_open(self, req):
res = readauthforuri(self.ui, req.get_full_url())
if res:
group, auth = res
self.auth = auth
self.ui.debug("using auth.%s.* for authentication\n" % group)
else:
self.auth = None
return self.do_open(self._makesslconnection, req, True)
def _makesslconnection(self, host, port=443, *args, **kwargs):
keyfile = None
certfile = None
if args: # key_file
keyfile = args.pop(0)
if args: # cert_file
certfile = args.pop(0)
# if the user has specified different key/cert files in
# hgrc, we prefer these
if self.auth and 'key' in self.auth and 'cert' in self.auth:
keyfile = self.auth['key']
certfile = self.auth['cert']
# let host port take precedence
if ':' in host and '[' not in host or ']:' in host:
host, port = host.rsplit(':', 1)
port = int(port)
if '[' in host:
host = host[1:-1]
if keyfile:
kwargs['keyfile'] = keyfile
if certfile:
kwargs['certfile'] = certfile
kwargs.update(sslutil.sslkwargs(self.ui, host))
con = HTTPConnection(host, port, use_ssl=True,
ssl_validator=sslutil.validator(self.ui, host),
**kwargs)
return con