mirror of
https://github.com/facebook/sapling.git
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33ebd50b83
The new http library is wired in via an extra module (httpconnection.py), as it requires similar but different plumbing to connect the library to Mercurial's internals and urllib2. Eventualy we should be able to remove all of keepalive.py and its associated tangle in url.py and replace it all with the code in httpconnection.py. To use the new library, set 'ui.usehttp2' to true. The underlying http library uses the logging module liberally, so if things break you can use 'ui.http2debuglevel' to set the log level to INFO or DEBUG to get that logging information (for example, ui.http2debuglevel=info.)
464 lines
16 KiB
Python
464 lines
16 KiB
Python
# url.py - HTTP handling for mercurial
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#
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# Copyright 2005, 2006, 2007, 2008 Matt Mackall <mpm@selenic.com>
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# Copyright 2006, 2007 Alexis S. L. Carvalho <alexis@cecm.usp.br>
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# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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import urllib, urllib2, httplib, os, socket, cStringIO
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from i18n import _
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import keepalive, util, sslutil
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import httpconnection as httpconnectionmod
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class passwordmgr(urllib2.HTTPPasswordMgrWithDefaultRealm):
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def __init__(self, ui):
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urllib2.HTTPPasswordMgrWithDefaultRealm.__init__(self)
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self.ui = ui
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def find_user_password(self, realm, authuri):
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authinfo = urllib2.HTTPPasswordMgrWithDefaultRealm.find_user_password(
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self, realm, authuri)
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user, passwd = authinfo
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if user and passwd:
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self._writedebug(user, passwd)
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return (user, passwd)
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if not user:
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res = httpconnectionmod.readauthforuri(self.ui, authuri)
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if res:
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group, auth = res
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user, passwd = auth.get('username'), auth.get('password')
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self.ui.debug("using auth.%s.* for authentication\n" % group)
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if not user or not passwd:
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if not self.ui.interactive():
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raise util.Abort(_('http authorization required'))
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self.ui.write(_("http authorization required\n"))
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self.ui.write(_("realm: %s\n") % realm)
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if user:
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self.ui.write(_("user: %s\n") % user)
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else:
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user = self.ui.prompt(_("user:"), default=None)
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if not passwd:
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passwd = self.ui.getpass()
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self.add_password(realm, authuri, user, passwd)
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self._writedebug(user, passwd)
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return (user, passwd)
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def _writedebug(self, user, passwd):
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msg = _('http auth: user %s, password %s\n')
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self.ui.debug(msg % (user, passwd and '*' * len(passwd) or 'not set'))
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class proxyhandler(urllib2.ProxyHandler):
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def __init__(self, ui):
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proxyurl = ui.config("http_proxy", "host") or os.getenv('http_proxy')
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# XXX proxyauthinfo = None
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if proxyurl:
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# proxy can be proper url or host[:port]
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if not (proxyurl.startswith('http:') or
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proxyurl.startswith('https:')):
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proxyurl = 'http://' + proxyurl + '/'
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proxy = util.url(proxyurl)
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if not proxy.user:
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proxy.user = ui.config("http_proxy", "user")
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proxy.passwd = ui.config("http_proxy", "passwd")
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# see if we should use a proxy for this url
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no_list = ["localhost", "127.0.0.1"]
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no_list.extend([p.lower() for
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p in ui.configlist("http_proxy", "no")])
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no_list.extend([p.strip().lower() for
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p in os.getenv("no_proxy", '').split(',')
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if p.strip()])
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# "http_proxy.always" config is for running tests on localhost
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if ui.configbool("http_proxy", "always"):
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self.no_list = []
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else:
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self.no_list = no_list
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proxyurl = str(proxy)
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proxies = {'http': proxyurl, 'https': proxyurl}
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ui.debug('proxying through http://%s:%s\n' %
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(proxy.host, proxy.port))
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else:
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proxies = {}
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# urllib2 takes proxy values from the environment and those
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# will take precedence if found, so drop them
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for env in ["HTTP_PROXY", "http_proxy", "no_proxy"]:
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try:
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if env in os.environ:
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del os.environ[env]
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except OSError:
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pass
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urllib2.ProxyHandler.__init__(self, proxies)
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self.ui = ui
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def proxy_open(self, req, proxy, type_):
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host = req.get_host().split(':')[0]
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if host in self.no_list:
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return None
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# work around a bug in Python < 2.4.2
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# (it leaves a "\n" at the end of Proxy-authorization headers)
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baseclass = req.__class__
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class _request(baseclass):
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def add_header(self, key, val):
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if key.lower() == 'proxy-authorization':
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val = val.strip()
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return baseclass.add_header(self, key, val)
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req.__class__ = _request
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return urllib2.ProxyHandler.proxy_open(self, req, proxy, type_)
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def _gen_sendfile(orgsend):
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def _sendfile(self, data):
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# send a file
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if isinstance(data, httpconnectionmod.httpsendfile):
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# if auth required, some data sent twice, so rewind here
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data.seek(0)
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for chunk in util.filechunkiter(data):
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orgsend(self, chunk)
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else:
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orgsend(self, data)
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return _sendfile
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has_https = hasattr(urllib2, 'HTTPSHandler')
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if has_https:
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try:
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_create_connection = socket.create_connection
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except AttributeError:
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_GLOBAL_DEFAULT_TIMEOUT = object()
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def _create_connection(address, timeout=_GLOBAL_DEFAULT_TIMEOUT,
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source_address=None):
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# lifted from Python 2.6
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msg = "getaddrinfo returns an empty list"
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host, port = address
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for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
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af, socktype, proto, canonname, sa = res
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sock = None
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try:
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sock = socket.socket(af, socktype, proto)
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if timeout is not _GLOBAL_DEFAULT_TIMEOUT:
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sock.settimeout(timeout)
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if source_address:
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sock.bind(source_address)
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sock.connect(sa)
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return sock
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except socket.error, msg:
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if sock is not None:
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sock.close()
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raise socket.error, msg
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class httpconnection(keepalive.HTTPConnection):
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# must be able to send big bundle as stream.
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send = _gen_sendfile(keepalive.HTTPConnection.send)
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def connect(self):
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if has_https and self.realhostport: # use CONNECT proxy
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self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.sock.connect((self.host, self.port))
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if _generic_proxytunnel(self):
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# we do not support client x509 certificates
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self.sock = sslutil.ssl_wrap_socket(self.sock, None, None)
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else:
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keepalive.HTTPConnection.connect(self)
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def getresponse(self):
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proxyres = getattr(self, 'proxyres', None)
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if proxyres:
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if proxyres.will_close:
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self.close()
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self.proxyres = None
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return proxyres
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return keepalive.HTTPConnection.getresponse(self)
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# general transaction handler to support different ways to handle
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# HTTPS proxying before and after Python 2.6.3.
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def _generic_start_transaction(handler, h, req):
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if hasattr(req, '_tunnel_host') and req._tunnel_host:
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tunnel_host = req._tunnel_host
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if tunnel_host[:7] not in ['http://', 'https:/']:
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tunnel_host = 'https://' + tunnel_host
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new_tunnel = True
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else:
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tunnel_host = req.get_selector()
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new_tunnel = False
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if new_tunnel or tunnel_host == req.get_full_url(): # has proxy
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u = util.url(tunnel_host)
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if new_tunnel or u.scheme == 'https': # only use CONNECT for HTTPS
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h.realhostport = ':'.join([u.host, (u.port or '443')])
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h.headers = req.headers.copy()
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h.headers.update(handler.parent.addheaders)
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return
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h.realhostport = None
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h.headers = None
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def _generic_proxytunnel(self):
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proxyheaders = dict(
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[(x, self.headers[x]) for x in self.headers
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if x.lower().startswith('proxy-')])
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self._set_hostport(self.host, self.port)
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self.send('CONNECT %s HTTP/1.0\r\n' % self.realhostport)
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for header in proxyheaders.iteritems():
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self.send('%s: %s\r\n' % header)
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self.send('\r\n')
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# majority of the following code is duplicated from
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# httplib.HTTPConnection as there are no adequate places to
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# override functions to provide the needed functionality
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res = self.response_class(self.sock,
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strict=self.strict,
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method=self._method)
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while True:
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version, status, reason = res._read_status()
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if status != httplib.CONTINUE:
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break
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while True:
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skip = res.fp.readline().strip()
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if not skip:
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break
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res.status = status
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res.reason = reason.strip()
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if res.status == 200:
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while True:
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line = res.fp.readline()
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if line == '\r\n':
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break
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return True
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if version == 'HTTP/1.0':
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res.version = 10
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elif version.startswith('HTTP/1.'):
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res.version = 11
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elif version == 'HTTP/0.9':
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res.version = 9
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else:
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raise httplib.UnknownProtocol(version)
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if res.version == 9:
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res.length = None
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res.chunked = 0
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res.will_close = 1
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res.msg = httplib.HTTPMessage(cStringIO.StringIO())
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return False
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res.msg = httplib.HTTPMessage(res.fp)
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res.msg.fp = None
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# are we using the chunked-style of transfer encoding?
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trenc = res.msg.getheader('transfer-encoding')
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if trenc and trenc.lower() == "chunked":
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res.chunked = 1
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res.chunk_left = None
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else:
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res.chunked = 0
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# will the connection close at the end of the response?
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res.will_close = res._check_close()
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# do we have a Content-Length?
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# NOTE: RFC 2616, S4.4, #3 says we ignore this if tr_enc is "chunked"
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length = res.msg.getheader('content-length')
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if length and not res.chunked:
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try:
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res.length = int(length)
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except ValueError:
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res.length = None
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else:
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if res.length < 0: # ignore nonsensical negative lengths
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res.length = None
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else:
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res.length = None
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# does the body have a fixed length? (of zero)
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if (status == httplib.NO_CONTENT or status == httplib.NOT_MODIFIED or
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100 <= status < 200 or # 1xx codes
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res._method == 'HEAD'):
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res.length = 0
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# if the connection remains open, and we aren't using chunked, and
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# a content-length was not provided, then assume that the connection
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# WILL close.
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if (not res.will_close and
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not res.chunked and
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res.length is None):
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res.will_close = 1
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self.proxyres = res
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return False
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class httphandler(keepalive.HTTPHandler):
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def http_open(self, req):
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return self.do_open(httpconnection, req)
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def _start_transaction(self, h, req):
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_generic_start_transaction(self, h, req)
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return keepalive.HTTPHandler._start_transaction(self, h, req)
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if has_https:
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class httpsconnection(httplib.HTTPSConnection):
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response_class = keepalive.HTTPResponse
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# must be able to send big bundle as stream.
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send = _gen_sendfile(keepalive.safesend)
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getresponse = keepalive.wrapgetresponse(httplib.HTTPSConnection)
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def connect(self):
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self.sock = _create_connection((self.host, self.port))
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host = self.host
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if self.realhostport: # use CONNECT proxy
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_generic_proxytunnel(self)
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host = self.realhostport.rsplit(':', 1)[0]
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self.sock = sslutil.ssl_wrap_socket(
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self.sock, self.key_file, self.cert_file,
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**sslutil.sslkwargs(self.ui, host))
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sslutil.validator(self.ui, host)(self.sock)
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class httpshandler(keepalive.KeepAliveHandler, urllib2.HTTPSHandler):
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def __init__(self, ui):
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keepalive.KeepAliveHandler.__init__(self)
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urllib2.HTTPSHandler.__init__(self)
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self.ui = ui
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self.pwmgr = passwordmgr(self.ui)
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def _start_transaction(self, h, req):
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_generic_start_transaction(self, h, req)
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return keepalive.KeepAliveHandler._start_transaction(self, h, req)
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def https_open(self, req):
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res = httpconnectionmod.readauthforuri(self.ui, req.get_full_url())
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if res:
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group, auth = res
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self.auth = auth
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self.ui.debug("using auth.%s.* for authentication\n" % group)
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else:
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self.auth = None
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return self.do_open(self._makeconnection, req)
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def _makeconnection(self, host, port=None, *args, **kwargs):
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keyfile = None
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certfile = None
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if len(args) >= 1: # key_file
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keyfile = args[0]
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if len(args) >= 2: # cert_file
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certfile = args[1]
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args = args[2:]
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# if the user has specified different key/cert files in
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# hgrc, we prefer these
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if self.auth and 'key' in self.auth and 'cert' in self.auth:
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keyfile = self.auth['key']
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certfile = self.auth['cert']
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conn = httpsconnection(host, port, keyfile, certfile, *args, **kwargs)
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conn.ui = self.ui
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return conn
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class httpdigestauthhandler(urllib2.HTTPDigestAuthHandler):
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def __init__(self, *args, **kwargs):
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urllib2.HTTPDigestAuthHandler.__init__(self, *args, **kwargs)
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self.retried_req = None
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def reset_retry_count(self):
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# Python 2.6.5 will call this on 401 or 407 errors and thus loop
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# forever. We disable reset_retry_count completely and reset in
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# http_error_auth_reqed instead.
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pass
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def http_error_auth_reqed(self, auth_header, host, req, headers):
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# Reset the retry counter once for each request.
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if req is not self.retried_req:
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self.retried_req = req
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self.retried = 0
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# In python < 2.5 AbstractDigestAuthHandler raises a ValueError if
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# it doesn't know about the auth type requested. This can happen if
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# somebody is using BasicAuth and types a bad password.
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try:
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return urllib2.HTTPDigestAuthHandler.http_error_auth_reqed(
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self, auth_header, host, req, headers)
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except ValueError, inst:
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arg = inst.args[0]
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if arg.startswith("AbstractDigestAuthHandler doesn't know "):
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return
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raise
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class httpbasicauthhandler(urllib2.HTTPBasicAuthHandler):
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def __init__(self, *args, **kwargs):
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urllib2.HTTPBasicAuthHandler.__init__(self, *args, **kwargs)
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self.retried_req = None
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def reset_retry_count(self):
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# Python 2.6.5 will call this on 401 or 407 errors and thus loop
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# forever. We disable reset_retry_count completely and reset in
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# http_error_auth_reqed instead.
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pass
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def http_error_auth_reqed(self, auth_header, host, req, headers):
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# Reset the retry counter once for each request.
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if req is not self.retried_req:
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self.retried_req = req
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self.retried = 0
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return urllib2.HTTPBasicAuthHandler.http_error_auth_reqed(
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self, auth_header, host, req, headers)
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handlerfuncs = []
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def opener(ui, authinfo=None):
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'''
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construct an opener suitable for urllib2
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authinfo will be added to the password manager
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'''
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if ui.configbool('ui', 'usehttp2', False):
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handlers = [httpconnectionmod.http2handler(ui, passwordmgr(ui))]
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else:
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handlers = [httphandler()]
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if has_https:
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handlers.append(httpshandler(ui))
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handlers.append(proxyhandler(ui))
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passmgr = passwordmgr(ui)
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if authinfo is not None:
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passmgr.add_password(*authinfo)
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user, passwd = authinfo[2:4]
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ui.debug('http auth: user %s, password %s\n' %
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(user, passwd and '*' * len(passwd) or 'not set'))
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handlers.extend((httpbasicauthhandler(passmgr),
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httpdigestauthhandler(passmgr)))
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handlers.extend([h(ui, passmgr) for h in handlerfuncs])
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opener = urllib2.build_opener(*handlers)
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# 1.0 here is the _protocol_ version
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opener.addheaders = [('User-agent', 'mercurial/proto-1.0')]
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opener.addheaders.append(('Accept', 'application/mercurial-0.1'))
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return opener
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def open(ui, url_, data=None):
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u = util.url(url_)
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if u.scheme:
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u.scheme = u.scheme.lower()
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url_, authinfo = u.authinfo()
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else:
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path = util.normpath(os.path.abspath(url_))
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url_ = 'file://' + urllib.pathname2url(path)
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authinfo = None
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return opener(ui, authinfo).open(url_, data)
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