revlog: support writing generaldelta revlogs
With generaldelta switched on, deltas are always computed against the first
parent when adding revisions. This is done regardless of what revision the
incoming bundle, if any, is deltaed against.
The exact delta building strategy is subject to change, but this will not
affect compatibility.
Generaldelta is switched off by default.
# url.py - HTTP handling for mercurial
#
# 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>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
import urllib, urllib2, httplib, os, socket, cStringIO
from i18n import _
import keepalive, util, sslutil
import httpconnection as httpconnectionmod
class passwordmgr(urllib2.HTTPPasswordMgrWithDefaultRealm):
def __init__(self, ui):
urllib2.HTTPPasswordMgrWithDefaultRealm.__init__(self)
self.ui = ui
def find_user_password(self, realm, authuri):
authinfo = urllib2.HTTPPasswordMgrWithDefaultRealm.find_user_password(
self, realm, authuri)
user, passwd = authinfo
if user and passwd:
self._writedebug(user, passwd)
return (user, passwd)
if not user:
res = httpconnectionmod.readauthforuri(self.ui, authuri)
if res:
group, auth = res
user, passwd = auth.get('username'), auth.get('password')
self.ui.debug("using auth.%s.* for authentication\n" % group)
if not user or not passwd:
if not self.ui.interactive():
raise util.Abort(_('http authorization required'))
self.ui.write(_("http authorization required\n"))
self.ui.write(_("realm: %s\n") % realm)
if user:
self.ui.write(_("user: %s\n") % user)
else:
user = self.ui.prompt(_("user:"), default=None)
if not passwd:
passwd = self.ui.getpass()
self.add_password(realm, authuri, user, passwd)
self._writedebug(user, passwd)
return (user, passwd)
def _writedebug(self, user, passwd):
msg = _('http auth: user %s, password %s\n')
self.ui.debug(msg % (user, passwd and '*' * len(passwd) or 'not set'))
class proxyhandler(urllib2.ProxyHandler):
def __init__(self, ui):
proxyurl = ui.config("http_proxy", "host") or os.getenv('http_proxy')
# XXX proxyauthinfo = None
if proxyurl:
# proxy can be proper url or host[:port]
if not (proxyurl.startswith('http:') or
proxyurl.startswith('https:')):
proxyurl = 'http://' + proxyurl + '/'
proxy = util.url(proxyurl)
if not proxy.user:
proxy.user = ui.config("http_proxy", "user")
proxy.passwd = ui.config("http_proxy", "passwd")
# see if we should use a proxy for this url
no_list = ["localhost", "127.0.0.1"]
no_list.extend([p.lower() for
p in ui.configlist("http_proxy", "no")])
no_list.extend([p.strip().lower() for
p in os.getenv("no_proxy", '').split(',')
if p.strip()])
# "http_proxy.always" config is for running tests on localhost
if ui.configbool("http_proxy", "always"):
self.no_list = []
else:
self.no_list = no_list
proxyurl = str(proxy)
proxies = {'http': proxyurl, 'https': proxyurl}
ui.debug('proxying through http://%s:%s\n' %
(proxy.host, proxy.port))
else:
proxies = {}
# urllib2 takes proxy values from the environment and those
# will take precedence if found, so drop them
for env in ["HTTP_PROXY", "http_proxy", "no_proxy"]:
try:
if env in os.environ:
del os.environ[env]
except OSError:
pass
urllib2.ProxyHandler.__init__(self, proxies)
self.ui = ui
def proxy_open(self, req, proxy, type_):
host = req.get_host().split(':')[0]
if host in self.no_list:
return None
# work around a bug in Python < 2.4.2
# (it leaves a "\n" at the end of Proxy-authorization headers)
baseclass = req.__class__
class _request(baseclass):
def add_header(self, key, val):
if key.lower() == 'proxy-authorization':
val = val.strip()
return baseclass.add_header(self, key, val)
req.__class__ = _request
return urllib2.ProxyHandler.proxy_open(self, req, proxy, type_)
def _gen_sendfile(orgsend):
def _sendfile(self, data):
# send a file
if isinstance(data, httpconnectionmod.httpsendfile):
# if auth required, some data sent twice, so rewind here
data.seek(0)
for chunk in util.filechunkiter(data):
orgsend(self, chunk)
else:
orgsend(self, data)
return _sendfile
has_https = hasattr(urllib2, 'HTTPSHandler')
if has_https:
try:
_create_connection = socket.create_connection
except AttributeError:
_GLOBAL_DEFAULT_TIMEOUT = object()
def _create_connection(address, timeout=_GLOBAL_DEFAULT_TIMEOUT,
source_address=None):
# lifted from Python 2.6
msg = "getaddrinfo returns an empty list"
host, port = address
for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
af, socktype, proto, canonname, sa = res
sock = None
try:
sock = socket.socket(af, socktype, proto)
if timeout is not _GLOBAL_DEFAULT_TIMEOUT:
sock.settimeout(timeout)
if source_address:
sock.bind(source_address)
sock.connect(sa)
return sock
except socket.error, msg:
if sock is not None:
sock.close()
raise socket.error, msg
class httpconnection(keepalive.HTTPConnection):
# must be able to send big bundle as stream.
send = _gen_sendfile(keepalive.HTTPConnection.send)
def connect(self):
if has_https and self.realhostport: # use CONNECT proxy
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.sock.connect((self.host, self.port))
if _generic_proxytunnel(self):
# we do not support client x509 certificates
self.sock = sslutil.ssl_wrap_socket(self.sock, None, None)
else:
keepalive.HTTPConnection.connect(self)
def getresponse(self):
proxyres = getattr(self, 'proxyres', None)
if proxyres:
if proxyres.will_close:
self.close()
self.proxyres = None
return proxyres
return keepalive.HTTPConnection.getresponse(self)
# general transaction handler to support different ways to handle
# HTTPS proxying before and after Python 2.6.3.
def _generic_start_transaction(handler, h, req):
if hasattr(req, '_tunnel_host') and req._tunnel_host:
tunnel_host = req._tunnel_host
if tunnel_host[:7] not in ['http://', 'https:/']:
tunnel_host = 'https://' + tunnel_host
new_tunnel = True
else:
tunnel_host = req.get_selector()
new_tunnel = False
if new_tunnel or tunnel_host == req.get_full_url(): # has proxy
u = util.url(tunnel_host)
if new_tunnel or u.scheme == 'https': # only use CONNECT for HTTPS
h.realhostport = ':'.join([u.host, (u.port or '443')])
h.headers = req.headers.copy()
h.headers.update(handler.parent.addheaders)
return
h.realhostport = None
h.headers = None
def _generic_proxytunnel(self):
proxyheaders = dict(
[(x, self.headers[x]) for x in self.headers
if x.lower().startswith('proxy-')])
self._set_hostport(self.host, self.port)
self.send('CONNECT %s HTTP/1.0\r\n' % self.realhostport)
for header in proxyheaders.iteritems():
self.send('%s: %s\r\n' % header)
self.send('\r\n')
# majority of the following code is duplicated from
# httplib.HTTPConnection as there are no adequate places to
# override functions to provide the needed functionality
res = self.response_class(self.sock,
strict=self.strict,
method=self._method)
while True:
version, status, reason = res._read_status()
if status != httplib.CONTINUE:
break
while True:
skip = res.fp.readline().strip()
if not skip:
break
res.status = status
res.reason = reason.strip()
if res.status == 200:
while True:
line = res.fp.readline()
if line == '\r\n':
break
return True
if version == 'HTTP/1.0':
res.version = 10
elif version.startswith('HTTP/1.'):
res.version = 11
elif version == 'HTTP/0.9':
res.version = 9
else:
raise httplib.UnknownProtocol(version)
if res.version == 9:
res.length = None
res.chunked = 0
res.will_close = 1
res.msg = httplib.HTTPMessage(cStringIO.StringIO())
return False
res.msg = httplib.HTTPMessage(res.fp)
res.msg.fp = None
# are we using the chunked-style of transfer encoding?
trenc = res.msg.getheader('transfer-encoding')
if trenc and trenc.lower() == "chunked":
res.chunked = 1
res.chunk_left = None
else:
res.chunked = 0
# will the connection close at the end of the response?
res.will_close = res._check_close()
# do we have a Content-Length?
# NOTE: RFC 2616, S4.4, #3 says we ignore this if tr_enc is "chunked"
length = res.msg.getheader('content-length')
if length and not res.chunked:
try:
res.length = int(length)
except ValueError:
res.length = None
else:
if res.length < 0: # ignore nonsensical negative lengths
res.length = None
else:
res.length = None
# does the body have a fixed length? (of zero)
if (status == httplib.NO_CONTENT or status == httplib.NOT_MODIFIED or
100 <= status < 200 or # 1xx codes
res._method == 'HEAD'):
res.length = 0
# if the connection remains open, and we aren't using chunked, and
# a content-length was not provided, then assume that the connection
# WILL close.
if (not res.will_close and
not res.chunked and
res.length is None):
res.will_close = 1
self.proxyres = res
return False
class httphandler(keepalive.HTTPHandler):
def http_open(self, req):
return self.do_open(httpconnection, req)
def _start_transaction(self, h, req):
_generic_start_transaction(self, h, req)
return keepalive.HTTPHandler._start_transaction(self, h, req)
if has_https:
class httpsconnection(httplib.HTTPSConnection):
response_class = keepalive.HTTPResponse
# must be able to send big bundle as stream.
send = _gen_sendfile(keepalive.safesend)
getresponse = keepalive.wrapgetresponse(httplib.HTTPSConnection)
def connect(self):
self.sock = _create_connection((self.host, self.port))
host = self.host
if self.realhostport: # use CONNECT proxy
_generic_proxytunnel(self)
host = self.realhostport.rsplit(':', 1)[0]
self.sock = sslutil.ssl_wrap_socket(
self.sock, self.key_file, self.cert_file,
**sslutil.sslkwargs(self.ui, host))
sslutil.validator(self.ui, host)(self.sock)
class httpshandler(keepalive.KeepAliveHandler, urllib2.HTTPSHandler):
def __init__(self, ui):
keepalive.KeepAliveHandler.__init__(self)
urllib2.HTTPSHandler.__init__(self)
self.ui = ui
self.pwmgr = passwordmgr(self.ui)
def _start_transaction(self, h, req):
_generic_start_transaction(self, h, req)
return keepalive.KeepAliveHandler._start_transaction(self, h, req)
def https_open(self, req):
res = httpconnectionmod.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._makeconnection, req)
def _makeconnection(self, host, port=None, *args, **kwargs):
keyfile = None
certfile = None
if len(args) >= 1: # key_file
keyfile = args[0]
if len(args) >= 2: # cert_file
certfile = args[1]
args = args[2:]
# 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']
conn = httpsconnection(host, port, keyfile, certfile, *args, **kwargs)
conn.ui = self.ui
return conn
class httpdigestauthhandler(urllib2.HTTPDigestAuthHandler):
def __init__(self, *args, **kwargs):
urllib2.HTTPDigestAuthHandler.__init__(self, *args, **kwargs)
self.retried_req = None
def reset_retry_count(self):
# Python 2.6.5 will call this on 401 or 407 errors and thus loop
# forever. We disable reset_retry_count completely and reset in
# http_error_auth_reqed instead.
pass
def http_error_auth_reqed(self, auth_header, host, req, headers):
# Reset the retry counter once for each request.
if req is not self.retried_req:
self.retried_req = req
self.retried = 0
# In python < 2.5 AbstractDigestAuthHandler raises a ValueError if
# it doesn't know about the auth type requested. This can happen if
# somebody is using BasicAuth and types a bad password.
try:
return urllib2.HTTPDigestAuthHandler.http_error_auth_reqed(
self, auth_header, host, req, headers)
except ValueError, inst:
arg = inst.args[0]
if arg.startswith("AbstractDigestAuthHandler doesn't know "):
return
raise
class httpbasicauthhandler(urllib2.HTTPBasicAuthHandler):
def __init__(self, *args, **kwargs):
urllib2.HTTPBasicAuthHandler.__init__(self, *args, **kwargs)
self.retried_req = None
def reset_retry_count(self):
# Python 2.6.5 will call this on 401 or 407 errors and thus loop
# forever. We disable reset_retry_count completely and reset in
# http_error_auth_reqed instead.
pass
def http_error_auth_reqed(self, auth_header, host, req, headers):
# Reset the retry counter once for each request.
if req is not self.retried_req:
self.retried_req = req
self.retried = 0
return urllib2.HTTPBasicAuthHandler.http_error_auth_reqed(
self, auth_header, host, req, headers)
handlerfuncs = []
def opener(ui, authinfo=None):
'''
construct an opener suitable for urllib2
authinfo will be added to the password manager
'''
if ui.configbool('ui', 'usehttp2', False):
handlers = [httpconnectionmod.http2handler(ui, passwordmgr(ui))]
else:
handlers = [httphandler()]
if has_https:
handlers.append(httpshandler(ui))
handlers.append(proxyhandler(ui))
passmgr = passwordmgr(ui)
if authinfo is not None:
passmgr.add_password(*authinfo)
user, passwd = authinfo[2:4]
ui.debug('http auth: user %s, password %s\n' %
(user, passwd and '*' * len(passwd) or 'not set'))
handlers.extend((httpbasicauthhandler(passmgr),
httpdigestauthhandler(passmgr)))
handlers.extend([h(ui, passmgr) for h in handlerfuncs])
opener = urllib2.build_opener(*handlers)
# 1.0 here is the _protocol_ version
opener.addheaders = [('User-agent', 'mercurial/proto-1.0')]
opener.addheaders.append(('Accept', 'application/mercurial-0.1'))
return opener
def open(ui, url_, data=None):
u = util.url(url_)
if u.scheme:
u.scheme = u.scheme.lower()
url_, authinfo = u.authinfo()
else:
path = util.normpath(os.path.abspath(url_))
url_ = 'file://' + urllib.pathname2url(path)
authinfo = None
return opener(ui, authinfo).open(url_, data)