wireproto: add test for new optional arg missing on server
New argument is silently ignored by both HTTP and SSH servers.
This means we can, for instance, add new flags to getbundle()
to request advanced features (like lightweight-copy-aware bundles),
and older servers will silently ignore this request and send back
a plain bundle.
# wireproto.py - generic wire protocol support functions
#
# Copyright 2005-2010 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
import urllib, tempfile, os, sys
from i18n import _
from node import bin, hex
import changegroup as changegroupmod
import repo, error, encoding, util, store
import pushkey as pushkeymod
# list of nodes encoding / decoding
def decodelist(l, sep=' '):
if l:
return map(bin, l.split(sep))
return []
def encodelist(l, sep=' '):
return sep.join(map(hex, l))
# client side
class wirerepository(repo.repository):
def lookup(self, key):
self.requirecap('lookup', _('look up remote revision'))
d = self._call("lookup", key=encoding.fromlocal(key))
success, data = d[:-1].split(" ", 1)
if int(success):
return bin(data)
self._abort(error.RepoError(data))
def heads(self):
d = self._call("heads")
try:
return decodelist(d[:-1])
except ValueError:
self._abort(error.ResponseError(_("unexpected response:"), d))
def known(self, nodes):
n = encodelist(nodes)
d = self._call("known", nodes=n)
try:
return [bool(int(f)) for f in d]
except ValueError:
self._abort(error.ResponseError(_("unexpected response:"), d))
def branchmap(self):
d = self._call("branchmap")
try:
branchmap = {}
for branchpart in d.splitlines():
branchname, branchheads = branchpart.split(' ', 1)
branchname = encoding.tolocal(urllib.unquote(branchname))
branchheads = decodelist(branchheads)
branchmap[branchname] = branchheads
return branchmap
except TypeError:
self._abort(error.ResponseError(_("unexpected response:"), d))
def branches(self, nodes):
n = encodelist(nodes)
d = self._call("branches", nodes=n)
try:
br = [tuple(decodelist(b)) for b in d.splitlines()]
return br
except ValueError:
self._abort(error.ResponseError(_("unexpected response:"), d))
def between(self, pairs):
batch = 8 # avoid giant requests
r = []
for i in xrange(0, len(pairs), batch):
n = " ".join([encodelist(p, '-') for p in pairs[i:i + batch]])
d = self._call("between", pairs=n)
try:
r.extend(l and decodelist(l) or [] for l in d.splitlines())
except ValueError:
self._abort(error.ResponseError(_("unexpected response:"), d))
return r
def pushkey(self, namespace, key, old, new):
if not self.capable('pushkey'):
return False
d = self._call("pushkey",
namespace=encoding.fromlocal(namespace),
key=encoding.fromlocal(key),
old=encoding.fromlocal(old),
new=encoding.fromlocal(new))
try:
d = bool(int(d))
except ValueError:
raise error.ResponseError(
_('push failed (unexpected response):'), d)
return d
def listkeys(self, namespace):
if not self.capable('pushkey'):
return {}
d = self._call("listkeys", namespace=encoding.fromlocal(namespace))
r = {}
for l in d.splitlines():
k, v = l.split('\t')
r[encoding.tolocal(k)] = encoding.tolocal(v)
return r
def stream_out(self):
return self._callstream('stream_out')
def changegroup(self, nodes, kind):
n = encodelist(nodes)
f = self._callstream("changegroup", roots=n)
return changegroupmod.unbundle10(self._decompress(f), 'UN')
def changegroupsubset(self, bases, heads, kind):
self.requirecap('changegroupsubset', _('look up remote changes'))
bases = encodelist(bases)
heads = encodelist(heads)
f = self._callstream("changegroupsubset",
bases=bases, heads=heads)
return changegroupmod.unbundle10(self._decompress(f), 'UN')
def getbundle(self, source, heads=None, common=None):
self.requirecap('getbundle', _('look up remote changes'))
opts = {}
if heads is not None:
opts['heads'] = encodelist(heads)
if common is not None:
opts['common'] = encodelist(common)
f = self._callstream("getbundle", **opts)
return changegroupmod.unbundle10(self._decompress(f), 'UN')
def unbundle(self, cg, heads, source):
'''Send cg (a readable file-like object representing the
changegroup to push, typically a chunkbuffer object) to the
remote server as a bundle. Return an integer indicating the
result of the push (see localrepository.addchangegroup()).'''
if self.capable('unbundlehash'):
heads = encodelist(['hashed',
util.sha1(''.join(sorted(heads))).digest()])
else:
heads = encodelist(heads)
ret, output = self._callpush("unbundle", cg, heads=heads)
if ret == "":
raise error.ResponseError(
_('push failed:'), output)
try:
ret = int(ret)
except ValueError:
raise error.ResponseError(
_('push failed (unexpected response):'), ret)
for l in output.splitlines(True):
self.ui.status(_('remote: '), l)
return ret
def debugwireargs(self, one, two, three=None, four=None, five=None):
# don't pass optional arguments left at their default value
opts = {}
if three is not None:
opts['three'] = three
if four is not None:
opts['four'] = four
return self._call('debugwireargs', one=one, two=two, **opts)
# server side
class streamres(object):
def __init__(self, gen):
self.gen = gen
class pushres(object):
def __init__(self, res):
self.res = res
class pusherr(object):
def __init__(self, res):
self.res = res
def dispatch(repo, proto, command):
func, spec = commands[command]
args = proto.getargs(spec)
return func(repo, proto, *args)
def options(cmd, keys, others):
opts = {}
for k in keys:
if k in others:
opts[k] = others[k]
del others[k]
if others:
sys.stderr.write("abort: %s got unexpected arguments %s\n"
% (cmd, ",".join(others)))
return opts
def between(repo, proto, pairs):
pairs = [decodelist(p, '-') for p in pairs.split(" ")]
r = []
for b in repo.between(pairs):
r.append(encodelist(b) + "\n")
return "".join(r)
def branchmap(repo, proto):
branchmap = repo.branchmap()
heads = []
for branch, nodes in branchmap.iteritems():
branchname = urllib.quote(encoding.fromlocal(branch))
branchnodes = encodelist(nodes)
heads.append('%s %s' % (branchname, branchnodes))
return '\n'.join(heads)
def branches(repo, proto, nodes):
nodes = decodelist(nodes)
r = []
for b in repo.branches(nodes):
r.append(encodelist(b) + "\n")
return "".join(r)
def capabilities(repo, proto):
caps = ('lookup changegroupsubset branchmap pushkey known getbundle '
'unbundlehash').split()
if _allowstream(repo.ui):
requiredformats = repo.requirements & repo.supportedformats
# if our local revlogs are just revlogv1, add 'stream' cap
if not requiredformats - set(('revlogv1',)):
caps.append('stream')
# otherwise, add 'streamreqs' detailing our local revlog format
else:
caps.append('streamreqs=%s' % ','.join(requiredformats))
caps.append('unbundle=%s' % ','.join(changegroupmod.bundlepriority))
return ' '.join(caps)
def changegroup(repo, proto, roots):
nodes = decodelist(roots)
cg = repo.changegroup(nodes, 'serve')
return streamres(proto.groupchunks(cg))
def changegroupsubset(repo, proto, bases, heads):
bases = decodelist(bases)
heads = decodelist(heads)
cg = repo.changegroupsubset(bases, heads, 'serve')
return streamres(proto.groupchunks(cg))
def debugwireargs(repo, proto, one, two, others):
# only accept optional args from the known set
opts = options('debugwireargs', ['three', 'four'], others)
return repo.debugwireargs(one, two, **opts)
def getbundle(repo, proto, others):
opts = options('getbundle', ['heads', 'common'], others)
for k, v in opts.iteritems():
opts[k] = decodelist(v)
cg = repo.getbundle('serve', **opts)
return streamres(proto.groupchunks(cg))
def heads(repo, proto):
h = repo.heads()
return encodelist(h) + "\n"
def hello(repo, proto):
'''the hello command returns a set of lines describing various
interesting things about the server, in an RFC822-like format.
Currently the only one defined is "capabilities", which
consists of a line in the form:
capabilities: space separated list of tokens
'''
return "capabilities: %s\n" % (capabilities(repo, proto))
def listkeys(repo, proto, namespace):
d = pushkeymod.list(repo, encoding.tolocal(namespace)).items()
t = '\n'.join(['%s\t%s' % (encoding.fromlocal(k), encoding.fromlocal(v))
for k, v in d])
return t
def lookup(repo, proto, key):
try:
r = hex(repo.lookup(encoding.tolocal(key)))
success = 1
except Exception, inst:
r = str(inst)
success = 0
return "%s %s\n" % (success, r)
def known(repo, proto, nodes):
return ''.join(b and "1" or "0" for b in repo.known(decodelist(nodes)))
def pushkey(repo, proto, namespace, key, old, new):
# compatibility with pre-1.8 clients which were accidentally
# sending raw binary nodes rather than utf-8-encoded hex
if len(new) == 20 and new.encode('string-escape') != new:
# looks like it could be a binary node
try:
u = new.decode('utf-8')
new = encoding.tolocal(new) # but cleanly decodes as UTF-8
except UnicodeDecodeError:
pass # binary, leave unmodified
else:
new = encoding.tolocal(new) # normal path
r = pushkeymod.push(repo,
encoding.tolocal(namespace), encoding.tolocal(key),
encoding.tolocal(old), new)
return '%s\n' % int(r)
def _allowstream(ui):
return ui.configbool('server', 'uncompressed', True, untrusted=True)
def stream(repo, proto):
'''If the server supports streaming clone, it advertises the "stream"
capability with a value representing the version and flags of the repo
it is serving. Client checks to see if it understands the format.
The format is simple: the server writes out a line with the amount
of files, then the total amount of bytes to be transfered (separated
by a space). Then, for each file, the server first writes the filename
and filesize (separated by the null character), then the file contents.
'''
if not _allowstream(repo.ui):
return '1\n'
entries = []
total_bytes = 0
try:
# get consistent snapshot of repo, lock during scan
lock = repo.lock()
try:
repo.ui.debug('scanning\n')
for name, ename, size in repo.store.walk():
entries.append((name, size))
total_bytes += size
finally:
lock.release()
except error.LockError:
return '2\n' # error: 2
def streamer(repo, entries, total):
'''stream out all metadata files in repository.'''
yield '0\n' # success
repo.ui.debug('%d files, %d bytes to transfer\n' %
(len(entries), total_bytes))
yield '%d %d\n' % (len(entries), total_bytes)
for name, size in entries:
repo.ui.debug('sending %s (%d bytes)\n' % (name, size))
# partially encode name over the wire for backwards compat
yield '%s\0%d\n' % (store.encodedir(name), size)
for chunk in util.filechunkiter(repo.sopener(name), limit=size):
yield chunk
return streamres(streamer(repo, entries, total_bytes))
def unbundle(repo, proto, heads):
their_heads = decodelist(heads)
def check_heads():
heads = repo.heads()
heads_hash = util.sha1(''.join(sorted(heads))).digest()
return (their_heads == ['force'] or their_heads == heads or
their_heads == ['hashed', heads_hash])
proto.redirect()
# fail early if possible
if not check_heads():
return pusherr('unsynced changes')
# write bundle data to temporary file because it can be big
fd, tempname = tempfile.mkstemp(prefix='hg-unbundle-')
fp = os.fdopen(fd, 'wb+')
r = 0
try:
proto.getfile(fp)
lock = repo.lock()
try:
if not check_heads():
# someone else committed/pushed/unbundled while we
# were transferring data
return pusherr('unsynced changes')
# push can proceed
fp.seek(0)
gen = changegroupmod.readbundle(fp, None)
try:
r = repo.addchangegroup(gen, 'serve', proto._client(),
lock=lock)
except util.Abort, inst:
sys.stderr.write("abort: %s\n" % inst)
finally:
lock.release()
return pushres(r)
finally:
fp.close()
os.unlink(tempname)
commands = {
'between': (between, 'pairs'),
'branchmap': (branchmap, ''),
'branches': (branches, 'nodes'),
'capabilities': (capabilities, ''),
'changegroup': (changegroup, 'roots'),
'changegroupsubset': (changegroupsubset, 'bases heads'),
'debugwireargs': (debugwireargs, 'one two *'),
'getbundle': (getbundle, '*'),
'heads': (heads, ''),
'hello': (hello, ''),
'known': (known, 'nodes'),
'listkeys': (listkeys, 'namespace'),
'lookup': (lookup, 'key'),
'pushkey': (pushkey, 'namespace key old new'),
'stream_out': (stream, ''),
'unbundle': (unbundle, 'heads'),
}