# httprepo.py - HTTP repository proxy classes for mercurial
#
# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
# 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, incorporated herein by reference.
from node import bin, hex
from remoterepo import remoterepository
from i18n import _
import repo, os, urllib, urllib2, urlparse, zlib, util, httplib
import errno, keepalive, socket, changegroup
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:
return (user, passwd)
if not self.ui.interactive:
raise util.Abort(_('http authorization required'))
self.ui.write(_("http authorization required\n"))
self.ui.status(_("realm: %s\n") % realm)
if user:
self.ui.status(_("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)
return (user, passwd)
def netlocsplit(netloc):
'''split [user[:passwd]@]host[:port] into 4-tuple.'''
a = netloc.find('@')
if a == -1:
user, passwd = None, None
else:
userpass, netloc = netloc[:a], netloc[a+1:]
c = userpass.find(':')
if c == -1:
user, passwd = urllib.unquote(userpass), None
else:
user = urllib.unquote(userpass[:c])
passwd = urllib.unquote(userpass[c+1:])
c = netloc.find(':')
if c == -1:
host, port = netloc, None
else:
host, port = netloc[:c], netloc[c+1:]
return host, port, user, passwd
def netlocunsplit(host, port, user=None, passwd=None):
'''turn host, port, user, passwd into [user[:passwd]@]host[:port].'''
if port:
hostport = host + ':' + port
else:
hostport = host
if user:
if passwd:
userpass = urllib.quote(user) + ':' + urllib.quote(passwd)
else:
userpass = urllib.quote(user)
return userpass + '@' + hostport
return hostport
# work around a bug in Python < 2.4.2
# (it leaves a "\n" at the end of Proxy-authorization headers)
class request(urllib2.Request):
def add_header(self, key, val):
if key.lower() == 'proxy-authorization':
val = val.strip()
return urllib2.Request.add_header(self, key, val)
class httpsendfile(file):
def __len__(self):
return os.fstat(self.fileno()).st_size
def _gen_sendfile(connection):
def _sendfile(self, data):
# send a file
if isinstance(data, httpsendfile):
# if auth required, some data sent twice, so rewind here
data.seek(0)
for chunk in util.filechunkiter(data):
connection.send(self, chunk)
else:
connection.send(self, data)
return _sendfile
class httpconnection(keepalive.HTTPConnection):
# must be able to send big bundle as stream.
send = _gen_sendfile(keepalive.HTTPConnection)
class httphandler(keepalive.HTTPHandler):
def http_open(self, req):
return self.do_open(httpconnection, req)
def __del__(self):
self.close_all()
has_https = hasattr(urllib2, 'HTTPSHandler')
if has_https:
class httpsconnection(httplib.HTTPSConnection):
response_class = keepalive.HTTPResponse
# must be able to send big bundle as stream.
send = _gen_sendfile(httplib.HTTPSConnection)
class httpshandler(keepalive.KeepAliveHandler, urllib2.HTTPSHandler):
def https_open(self, req):
return self.do_open(httpsconnection, req)
# 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.
class httpdigestauthhandler(urllib2.HTTPDigestAuthHandler):
def http_error_auth_reqed(self, auth_header, host, req, headers):
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
def zgenerator(f):
zd = zlib.decompressobj()
try:
for chunk in util.filechunkiter(f):
yield zd.decompress(chunk)
except httplib.HTTPException, inst:
raise IOError(None, _('connection ended unexpectedly'))
yield zd.flush()
_safe = ('abcdefghijklmnopqrstuvwxyz'
'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
'0123456789' '_.-/')
_safeset = None
_hex = None
def quotepath(path):
'''quote the path part of a URL
This is similar to urllib.quote, but it also tries to avoid
quoting things twice (inspired by wget):
>>> quotepath('abc def')
'abc%20def'
>>> quotepath('abc%20def')
'abc%20def'
>>> quotepath('abc%20 def')
'abc%20%20def'
>>> quotepath('abc def%20')
'abc%20def%20'
>>> quotepath('abc def%2')
'abc%20def%252'
>>> quotepath('abc def%')
'abc%20def%25'
'''
global _safeset, _hex
if _safeset is None:
_safeset = util.set(_safe)
_hex = util.set('abcdefABCDEF0123456789')
l = list(path)
for i in xrange(len(l)):
c = l[i]
if c == '%' and i + 2 < len(l) and (l[i+1] in _hex and l[i+2] in _hex):
pass
elif c not in _safeset:
l[i] = '%%%02X' % ord(c)
return ''.join(l)
class httprepository(remoterepository):
def __init__(self, ui, path):
self.path = path
self.caps = None
self.handler = None
scheme, netloc, urlpath, query, frag = urlparse.urlsplit(path)
if query or frag:
raise util.Abort(_('unsupported URL component: "%s"') %
(query or frag))
if not urlpath:
urlpath = '/'
urlpath = quotepath(urlpath)
host, port, user, passwd = netlocsplit(netloc)
# urllib cannot handle URLs with embedded user or passwd
self._url = urlparse.urlunsplit((scheme, netlocunsplit(host, port),
urlpath, '', ''))
self.ui = ui
self.ui.debug(_('using %s\n') % self._url)
proxyurl = ui.config("http_proxy", "host") or os.getenv('http_proxy')
# XXX proxyauthinfo = None
handlers = [httphandler()]
if has_https:
handlers.append(httpshandler())
if proxyurl:
# proxy can be proper url or host[:port]
if not (proxyurl.startswith('http:') or
proxyurl.startswith('https:')):
proxyurl = 'http://' + proxyurl + '/'
snpqf = urlparse.urlsplit(proxyurl)
proxyscheme, proxynetloc, proxypath, proxyquery, proxyfrag = snpqf
hpup = netlocsplit(proxynetloc)
proxyhost, proxyport, proxyuser, proxypasswd = hpup
if not proxyuser:
proxyuser = ui.config("http_proxy", "user")
proxypasswd = 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 (not ui.configbool("http_proxy", "always") and
host.lower() in no_list):
# avoid auto-detection of proxy settings by appending
# a ProxyHandler with no proxies defined.
handlers.append(urllib2.ProxyHandler({}))
ui.debug(_('disabling proxy for %s\n') % host)
else:
proxyurl = urlparse.urlunsplit((
proxyscheme, netlocunsplit(proxyhost, proxyport,
proxyuser, proxypasswd or ''),
proxypath, proxyquery, proxyfrag))
handlers.append(urllib2.ProxyHandler({scheme: proxyurl}))
ui.debug(_('proxying through http://%s:%s\n') %
(proxyhost, proxyport))
# 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
passmgr = passwordmgr(ui)
if user:
ui.debug(_('http auth: user %s, password %s\n') %
(user, passwd and '*' * len(passwd) or 'not set'))
netloc = host
if port:
netloc += ':' + port
# Python < 2.4.3 uses only the netloc to search for a password
passmgr.add_password(None, (self._url, netloc), user, passwd or '')
handlers.extend((urllib2.HTTPBasicAuthHandler(passmgr),
httpdigestauthhandler(passmgr)))
opener = urllib2.build_opener(*handlers)
# 1.0 here is the _protocol_ version
opener.addheaders = [('User-agent', 'mercurial/proto-1.0')]
urllib2.install_opener(opener)
def url(self):
return self.path
# look up capabilities only when needed
def get_caps(self):
if self.caps is None:
try:
self.caps = util.set(self.do_read('capabilities').split())
except repo.RepoError:
self.caps = util.set()
self.ui.debug(_('capabilities: %s\n') %
(' '.join(self.caps or ['none'])))
return self.caps
capabilities = property(get_caps)
def lock(self):
raise util.Abort(_('operation not supported over http'))
def do_cmd(self, cmd, **args):
data = args.pop('data', None)
headers = args.pop('headers', {})
self.ui.debug(_("sending %s command\n") % cmd)
q = {"cmd": cmd}
q.update(args)
qs = '?%s' % urllib.urlencode(q)
cu = "%s%s" % (self._url, qs)
try:
if data:
self.ui.debug(_("sending %s bytes\n") % len(data))
resp = urllib2.urlopen(request(cu, data, headers))
except urllib2.HTTPError, inst:
if inst.code == 401:
raise util.Abort(_('authorization failed'))
raise
except httplib.HTTPException, inst:
self.ui.debug(_('http error while sending %s command\n') % cmd)
self.ui.print_exc()
raise IOError(None, inst)
except IndexError:
# this only happens with Python 2.3, later versions raise URLError
raise util.Abort(_('http error, possibly caused by proxy setting'))
# record the url we got redirected to
resp_url = resp.geturl()
if resp_url.endswith(qs):
resp_url = resp_url[:-len(qs)]
if self._url != resp_url:
self.ui.status(_('real URL is %s\n') % resp_url)
self._url = resp_url
try:
proto = resp.getheader('content-type')
except AttributeError:
proto = resp.headers['content-type']
# accept old "text/plain" and "application/hg-changegroup" for now
if not (proto.startswith('application/mercurial-') or
proto.startswith('text/plain') or
proto.startswith('application/hg-changegroup')):
self.ui.debug(_("Requested URL: '%s'\n") % cu)
raise repo.RepoError(_("'%s' does not appear to be an hg repository")
% self._url)
if proto.startswith('application/mercurial-'):
try:
version = proto.split('-', 1)[1]
version_info = tuple([int(n) for n in version.split('.')])
except ValueError:
raise repo.RepoError(_("'%s' sent a broken Content-Type "
"header (%s)") % (self._url, proto))
if version_info > (0, 1):
raise repo.RepoError(_("'%s' uses newer protocol %s") %
(self._url, version))
return resp
def do_read(self, cmd, **args):
fp = self.do_cmd(cmd, **args)
try:
return fp.read()
finally:
# if using keepalive, allow connection to be reused
fp.close()
def lookup(self, key):
self.requirecap('lookup', _('look up remote revision'))
d = self.do_cmd("lookup", key = key).read()
success, data = d[:-1].split(' ', 1)
if int(success):
return bin(data)
raise repo.RepoError(data)
def heads(self):
d = self.do_read("heads")
try:
return map(bin, d[:-1].split(" "))
except:
raise util.UnexpectedOutput(_("unexpected response:"), d)
def branches(self, nodes):
n = " ".join(map(hex, nodes))
d = self.do_read("branches", nodes=n)
try:
br = [ tuple(map(bin, b.split(" "))) for b in d.splitlines() ]
return br
except:
raise util.UnexpectedOutput(_("unexpected response:"), d)
def between(self, pairs):
n = "\n".join(["-".join(map(hex, p)) for p in pairs])
d = self.do_read("between", pairs=n)
try:
p = [ l and map(bin, l.split(" ")) or [] for l in d.splitlines() ]
return p
except:
raise util.UnexpectedOutput(_("unexpected response:"), d)
def changegroup(self, nodes, kind):
n = " ".join(map(hex, nodes))
f = self.do_cmd("changegroup", roots=n)
return util.chunkbuffer(zgenerator(f))
def changegroupsubset(self, bases, heads, source):
self.requirecap('changegroupsubset', _('look up remote changes'))
baselst = " ".join([hex(n) for n in bases])
headlst = " ".join([hex(n) for n in heads])
f = self.do_cmd("changegroupsubset", bases=baselst, heads=headlst)
return util.chunkbuffer(zgenerator(f))
def unbundle(self, cg, heads, source):
# have to stream bundle to a temp file because we do not have
# http 1.1 chunked transfer.
type = ""
types = self.capable('unbundle')
# servers older than d1b16a746db6 will send 'unbundle' as a
# boolean capability
try:
types = types.split(',')
except AttributeError:
types = [""]
if types:
for x in types:
if x in changegroup.bundletypes:
type = x
break
tempname = changegroup.writebundle(cg, None, type)
fp = httpsendfile(tempname, "rb")
try:
try:
rfp = self.do_cmd(
'unbundle', data=fp,
headers={'Content-Type': 'application/octet-stream'},
heads=' '.join(map(hex, heads)))
try:
ret = int(rfp.readline())
self.ui.write(rfp.read())
return ret
finally:
rfp.close()
except socket.error, err:
if err[0] in (errno.ECONNRESET, errno.EPIPE):
raise util.Abort(_('push failed: %s') % err[1])
raise util.Abort(err[1])
finally:
fp.close()
os.unlink(tempname)
def stream_out(self):
return self.do_cmd('stream_out')
class httpsrepository(httprepository):
def __init__(self, ui, path):
if not has_https:
raise util.Abort(_('Python support for SSL and HTTPS '
'is not installed'))
httprepository.__init__(self, ui, path)
def instance(ui, path, create):
if create:
raise util.Abort(_('cannot create new http repository'))
if path.startswith('https:'):
return httpsrepository(ui, path)
return httprepository(ui, path)