changegroup: cg3 has two empty groups *after* manifests
changegroup.getchunks() determines the end of the stream by looking
for an empty chunk group (two consecutive empty chunks). It ignores
empty groups in the first two groups. Changegroup 3 introduced an
empty chunk between the manifests and the files, which confuses
getchunks(). Since it comes after the first two, getchunks() will stop
there.
Fix by rewriting getchunks so it first counts two groups (empty or
not) and then keeps antostarts counting empty groups. With this counting,
changegroup 1 and 2 have exactly one empty group after the first two
groups, while changegroup 3 has two (one for directories and one for
files).
It's a little hard to test this at this point, but I have verified
that this patch fixes narrowhg (which was broken before this
patch). Also, future patches will fix "hg strip" with treemanifests,
and once that's done, getchunks() will be tested through tests of "hg
strip".
# httppeer.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 version 2 or any later version.
from __future__ import absolute_import
import errno
import httplib
import os
import socket
import tempfile
import urllib
import urllib2
import zlib
from .i18n import _
from .node import nullid
from . import (
changegroup,
error,
httpconnection,
statichttprepo,
url,
util,
wireproto,
)
def zgenerator(f):
zd = zlib.decompressobj()
try:
for chunk in util.filechunkiter(f):
while chunk:
yield zd.decompress(chunk, 2**18)
chunk = zd.unconsumed_tail
except httplib.HTTPException:
raise IOError(None, _('connection ended unexpectedly'))
yield zd.flush()
class httppeer(wireproto.wirepeer):
def __init__(self, ui, path):
self.path = path
self.caps = None
self.handler = None
self.urlopener = None
self.requestbuilder = None
u = util.url(path)
if u.query or u.fragment:
raise error.Abort(_('unsupported URL component: "%s"') %
(u.query or u.fragment))
# urllib cannot handle URLs with embedded user or passwd
self._url, authinfo = u.authinfo()
self.ui = ui
self.ui.debug('using %s\n' % self._url)
self.urlopener = url.opener(ui, authinfo)
self.requestbuilder = urllib2.Request
def __del__(self):
if self.urlopener:
for h in self.urlopener.handlers:
h.close()
getattr(h, "close_all", lambda : None)()
def url(self):
return self.path
# look up capabilities only when needed
def _fetchcaps(self):
self.caps = set(self._call('capabilities').split())
def _capabilities(self):
if self.caps is None:
try:
self._fetchcaps()
except error.RepoError:
self.caps = set()
self.ui.debug('capabilities: %s\n' %
(' '.join(self.caps or ['none'])))
return self.caps
def lock(self):
raise error.Abort(_('operation not supported over http'))
def _callstream(self, cmd, **args):
if cmd == 'pushkey':
args['data'] = ''
data = args.pop('data', None)
size = 0
if util.safehasattr(data, 'length'):
size = data.length
elif data is not None:
size = len(data)
headers = args.pop('headers', {})
if data is not None and 'Content-Type' not in headers:
headers['Content-Type'] = 'application/mercurial-0.1'
if size and self.ui.configbool('ui', 'usehttp2', False):
headers['Expect'] = '100-Continue'
headers['X-HgHttp2'] = '1'
self.ui.debug("sending %s command\n" % cmd)
q = [('cmd', cmd)]
headersize = 0
if len(args) > 0:
httpheader = self.capable('httpheader')
if httpheader:
headersize = int(httpheader.split(',')[0])
if headersize > 0:
# The headers can typically carry more data than the URL.
encargs = urllib.urlencode(sorted(args.items()))
headerfmt = 'X-HgArg-%s'
contentlen = headersize - len(headerfmt % '000' + ': \r\n')
headernum = 0
for i in xrange(0, len(encargs), contentlen):
headernum += 1
header = headerfmt % str(headernum)
headers[header] = encargs[i:i + contentlen]
varyheaders = [headerfmt % str(h) for h in range(1, headernum + 1)]
headers['Vary'] = ','.join(varyheaders)
else:
q += sorted(args.items())
qs = '?%s' % urllib.urlencode(q)
cu = "%s%s" % (self._url, qs)
req = self.requestbuilder(cu, data, headers)
if data is not None:
self.ui.debug("sending %s bytes\n" % size)
req.add_unredirected_header('Content-Length', '%d' % size)
try:
resp = self.urlopener.open(req)
except urllib2.HTTPError as inst:
if inst.code == 401:
raise error.Abort(_('authorization failed'))
raise
except httplib.HTTPException as inst:
self.ui.debug('http error while sending %s command\n' % cmd)
self.ui.traceback()
raise IOError(None, inst)
except IndexError:
# this only happens with Python 2.3, later versions raise URLError
raise error.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.rstrip('/') != resp_url.rstrip('/'):
if not self.ui.quiet:
self.ui.warn(_('real URL is %s\n') % resp_url)
self._url = resp_url
try:
proto = resp.getheader('content-type')
except AttributeError:
proto = resp.headers.get('content-type', '')
safeurl = util.hidepassword(self._url)
if proto.startswith('application/hg-error'):
raise error.OutOfBandError(resp.read())
# accept old "text/plain" and "application/hg-changegroup" for now
if not (proto.startswith('application/mercurial-') or
(proto.startswith('text/plain')
and not resp.headers.get('content-length')) or
proto.startswith('application/hg-changegroup')):
self.ui.debug("requested URL: '%s'\n" % util.hidepassword(cu))
raise error.RepoError(
_("'%s' does not appear to be an hg repository:\n"
"---%%<--- (%s)\n%s\n---%%<---\n")
% (safeurl, proto or 'no content-type', resp.read(1024)))
if proto.startswith('application/mercurial-'):
try:
version = proto.split('-', 1)[1]
version_info = tuple([int(n) for n in version.split('.')])
except ValueError:
raise error.RepoError(_("'%s' sent a broken Content-Type "
"header (%s)") % (safeurl, proto))
if version_info > (0, 1):
raise error.RepoError(_("'%s' uses newer protocol %s") %
(safeurl, version))
return resp
def _call(self, cmd, **args):
fp = self._callstream(cmd, **args)
try:
return fp.read()
finally:
# if using keepalive, allow connection to be reused
fp.close()
def _callpush(self, cmd, cg, **args):
# have to stream bundle to a temp file because we do not have
# http 1.1 chunked transfer.
types = self.capable('unbundle')
try:
types = types.split(',')
except AttributeError:
# servers older than d1b16a746db6 will send 'unbundle' as a
# boolean capability. They only support headerless/uncompressed
# bundles.
types = [""]
for x in types:
if x in changegroup.bundletypes:
type = x
break
tempname = changegroup.writebundle(self.ui, cg, None, type)
fp = httpconnection.httpsendfile(self.ui, tempname, "rb")
headers = {'Content-Type': 'application/mercurial-0.1'}
try:
r = self._call(cmd, data=fp, headers=headers, **args)
vals = r.split('\n', 1)
if len(vals) < 2:
raise error.ResponseError(_("unexpected response:"), r)
return vals
except socket.error as err:
if err.args[0] in (errno.ECONNRESET, errno.EPIPE):
raise error.Abort(_('push failed: %s') % err.args[1])
raise error.Abort(err.args[1])
finally:
fp.close()
os.unlink(tempname)
def _calltwowaystream(self, cmd, fp, **args):
fh = None
fp_ = None
filename = None
try:
# dump bundle to disk
fd, filename = tempfile.mkstemp(prefix="hg-bundle-", suffix=".hg")
fh = os.fdopen(fd, "wb")
d = fp.read(4096)
while d:
fh.write(d)
d = fp.read(4096)
fh.close()
# start http push
fp_ = httpconnection.httpsendfile(self.ui, filename, "rb")
headers = {'Content-Type': 'application/mercurial-0.1'}
return self._callstream(cmd, data=fp_, headers=headers, **args)
finally:
if fp_ is not None:
fp_.close()
if fh is not None:
fh.close()
os.unlink(filename)
def _callcompressable(self, cmd, **args):
stream = self._callstream(cmd, **args)
return util.chunkbuffer(zgenerator(stream))
def _abort(self, exception):
raise exception
class httpspeer(httppeer):
def __init__(self, ui, path):
if not url.has_https:
raise error.Abort(_('Python support for SSL and HTTPS '
'is not installed'))
httppeer.__init__(self, ui, path)
def instance(ui, path, create):
if create:
raise error.Abort(_('cannot create new http repository'))
try:
if path.startswith('https:'):
inst = httpspeer(ui, path)
else:
inst = httppeer(ui, path)
try:
# Try to do useful work when checking compatibility.
# Usually saves a roundtrip since we want the caps anyway.
inst._fetchcaps()
except error.RepoError:
# No luck, try older compatibility check.
inst.between([(nullid, nullid)])
return inst
except error.RepoError as httpexception:
try:
r = statichttprepo.instance(ui, "static-" + path, create)
ui.note('(falling back to static-http)\n')
return r
except error.RepoError:
raise httpexception # use the original http RepoError instead