533 lines
19 KiB
Python
533 lines
19 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, incorporated herein by reference.
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import urllib, urllib2, urlparse, httplib, os, re, socket, cStringIO
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from i18n import _
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import keepalive, util
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def hidepassword(url):
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'''hide user credential in a url string'''
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scheme, netloc, path, params, query, fragment = urlparse.urlparse(url)
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netloc = re.sub('([^:]*):([^@]*)@(.*)', r'\1:***@\3', netloc)
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return urlparse.urlunparse((scheme, netloc, path, params, query, fragment))
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def removeauth(url):
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'''remove all authentication information from a url string'''
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scheme, netloc, path, params, query, fragment = urlparse.urlparse(url)
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netloc = netloc[netloc.find('@')+1:]
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return urlparse.urlunparse((scheme, netloc, path, params, query, fragment))
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def netlocsplit(netloc):
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'''split [user[:passwd]@]host[:port] into 4-tuple.'''
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a = netloc.find('@')
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if a == -1:
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user, passwd = None, None
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else:
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userpass, netloc = netloc[:a], netloc[a+1:]
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c = userpass.find(':')
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if c == -1:
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user, passwd = urllib.unquote(userpass), None
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else:
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user = urllib.unquote(userpass[:c])
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passwd = urllib.unquote(userpass[c+1:])
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c = netloc.find(':')
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if c == -1:
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host, port = netloc, None
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else:
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host, port = netloc[:c], netloc[c+1:]
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return host, port, user, passwd
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def netlocunsplit(host, port, user=None, passwd=None):
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'''turn host, port, user, passwd into [user[:passwd]@]host[:port].'''
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if port:
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hostport = host + ':' + port
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else:
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hostport = host
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if user:
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if passwd:
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userpass = urllib.quote(user) + ':' + urllib.quote(passwd)
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else:
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userpass = urllib.quote(user)
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return userpass + '@' + hostport
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return hostport
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_safe = ('abcdefghijklmnopqrstuvwxyz'
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'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
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'0123456789' '_.-/')
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_safeset = None
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_hex = None
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def quotepath(path):
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'''quote the path part of a URL
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This is similar to urllib.quote, but it also tries to avoid
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quoting things twice (inspired by wget):
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>>> quotepath('abc def')
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'abc%20def'
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>>> quotepath('abc%20def')
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'abc%20def'
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>>> quotepath('abc%20 def')
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'abc%20%20def'
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>>> quotepath('abc def%20')
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'abc%20def%20'
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>>> quotepath('abc def%2')
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'abc%20def%252'
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>>> quotepath('abc def%')
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'abc%20def%25'
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'''
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global _safeset, _hex
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if _safeset is None:
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_safeset = set(_safe)
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_hex = set('abcdefABCDEF0123456789')
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l = list(path)
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for i in xrange(len(l)):
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c = l[i]
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if c == '%' and i + 2 < len(l) and (l[i+1] in _hex and l[i+2] in _hex):
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pass
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elif c not in _safeset:
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l[i] = '%%%02X' % ord(c)
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return ''.join(l)
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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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auth = self.readauthtoken(authuri)
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if auth:
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user, passwd = auth.get('username'), auth.get('password')
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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.status(_("realm: %s\n") % realm)
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if user:
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self.ui.status(_("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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def readauthtoken(self, uri):
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# Read configuration
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config = dict()
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for key, val in self.ui.configitems('auth'):
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group, setting = key.split('.', 1)
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gdict = config.setdefault(group, dict())
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gdict[setting] = val
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# Find the best match
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scheme, hostpath = uri.split('://', 1)
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bestlen = 0
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bestauth = None
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for auth in config.itervalues():
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prefix = auth.get('prefix')
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if not prefix: continue
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p = prefix.split('://', 1)
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if len(p) > 1:
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schemes, prefix = [p[0]], p[1]
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else:
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schemes = (auth.get('schemes') or 'https').split()
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if (prefix == '*' or hostpath.startswith(prefix)) and \
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len(prefix) > bestlen and scheme in schemes:
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bestlen = len(prefix)
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bestauth = auth
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return bestauth
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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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snpqf = urlparse.urlsplit(proxyurl)
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proxyscheme, proxynetloc, proxypath, proxyquery, proxyfrag = snpqf
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hpup = netlocsplit(proxynetloc)
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proxyhost, proxyport, proxyuser, proxypasswd = hpup
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if not proxyuser:
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proxyuser = ui.config("http_proxy", "user")
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proxypasswd = 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 = urlparse.urlunsplit((
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proxyscheme, netlocunsplit(proxyhost, proxyport,
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proxyuser, proxypasswd or ''),
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proxypath, proxyquery, proxyfrag))
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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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(proxyhost, proxyport))
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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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class httpsendfile(file):
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def __len__(self):
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return os.fstat(self.fileno()).st_size
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def _gen_sendfile(connection):
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def _sendfile(self, data):
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# send a file
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if isinstance(data, 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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connection.send(self, chunk)
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else:
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connection.send(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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# avoid using deprecated/broken FakeSocket in python 2.6
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import ssl
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_ssl_wrap_socket = ssl.wrap_socket
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except ImportError:
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def _ssl_wrap_socket(sock, key_file, cert_file):
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ssl = socket.ssl(sock, key_file, cert_file)
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return httplib.FakeSocket(sock, ssl)
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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)
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def _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:%d HTTP/1.0\r\n' % (self.realhost, self.realport))
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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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def connect(self):
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if has_https and self.realhost: # 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 self._proxytunnel():
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# we do not support client x509 certificates
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self.sock = _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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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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if req.get_selector() == req.get_full_url(): # has proxy
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urlparts = urlparse.urlparse(req.get_selector())
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if urlparts[0] == 'https': # only use CONNECT for HTTPS
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if ':' in urlparts[1]:
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realhost, realport = urlparts[1].split(':')
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realport = int(realport)
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else:
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realhost = urlparts[1]
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realport = 443
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h.realhost = realhost
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h.realport = realport
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h.headers = req.headers.copy()
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h.headers.update(self.parent.addheaders)
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return keepalive.HTTPHandler._start_transaction(self, h, req)
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h.realhost = None
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h.realport = None
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h.headers = None
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return keepalive.HTTPHandler._start_transaction(self, h, req)
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def __del__(self):
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self.close_all()
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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(httplib.HTTPSConnection)
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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 https_open(self, req):
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self.auth = self.pwmgr.readauthtoken(req.get_full_url())
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return self.do_open(self._makeconnection, req)
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def _makeconnection(self, host, port=443, *args, **kwargs):
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keyfile = None
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certfile = None
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if args: # key_file
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keyfile = args.pop(0)
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if args: # cert_file
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certfile = args.pop(0)
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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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# let host port take precedence
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if ':' in host and '[' not in host or ']:' in host:
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host, port = host.rsplit(':', 1)
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port = int(port)
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if '[' in host:
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host = host[1:-1]
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return httpsconnection(host, port, keyfile, certfile, *args, **kwargs)
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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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class httpdigestauthhandler(urllib2.HTTPDigestAuthHandler):
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def http_error_auth_reqed(self, auth_header, host, req, headers):
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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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def getauthinfo(path):
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scheme, netloc, urlpath, query, frag = urlparse.urlsplit(path)
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if not urlpath:
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urlpath = '/'
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if scheme != 'file':
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# XXX: why are we quoting the path again with some smart
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# heuristic here? Anyway, it cannot be done with file://
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# urls since path encoding is os/fs dependent (see
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# urllib.pathname2url() for details).
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urlpath = quotepath(urlpath)
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host, port, user, passwd = netlocsplit(netloc)
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# urllib cannot handle URLs with embedded user or passwd
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url = urlparse.urlunsplit((scheme, netlocunsplit(host, port),
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urlpath, query, frag))
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if user:
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netloc = host
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if port:
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netloc += ':' + port
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# Python < 2.4.3 uses only the netloc to search for a password
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authinfo = (None, (url, netloc), user, passwd or '')
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else:
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authinfo = None
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return url, authinfo
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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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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((urllib2.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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scheme_re = re.compile(r'^([a-zA-Z0-9+-.]+)://')
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def open(ui, url, data=None):
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scheme = None
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m = scheme_re.search(url)
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if m:
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scheme = m.group(1).lower()
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if not scheme:
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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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else:
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url, authinfo = getauthinfo(url)
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return opener(ui, authinfo).open(url, data)
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