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- Committer: John Arbash Meinel
- Date: 2005-09-29 20:34:25 UTC
- mfrom: (1185.11.24)
- mto: (1393.1.12)
- mto: This revision was merged to the branch mainline in revision 1396.
- Revision ID: john@arbash-meinel.com-20050929203425-7fc2ea87f449dfe8
Merged in split-storage-2 branch. Need to cleanup a little bit more still.
- files added:
- bzrlib/selftest/testtransport.py
- bzrlib/store
- bzrlib/transport
- files removed:
- bzrlib/remotebranch.py
- files renamed:
- bzrlib/store.py => bzrlib/store/__init__.py
- files modified:
- bzrlib/atomicfile.py
added
removed
bzrlib/remotebranch.py
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# Copyright (C) 2005 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""Proxy object for access to remote branches.
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At the moment remote branches are only for HTTP and only for read
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access.
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"""
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import gzip
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from cStringIO import StringIO
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import os
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import urllib2
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import urlparse
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from bzrlib.errors import BzrError, BzrCheckError
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from bzrlib.branch import Branch, LocalBranch, BZR_BRANCH_FORMAT_5
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from bzrlib.trace import mutter
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from bzrlib.weavestore import WeaveStore
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from bzrlib.xml5 import serializer_v5
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# velocitynet.com.au transparently proxies connections and thereby
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# breaks keep-alive -- sucks!
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ENABLE_URLGRABBER = False
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from bzrlib.errors import BzrError, NoSuchRevision
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class GetFailed(BzrError):
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def __init__(self, url, status):
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BzrError.__init__(self, "Get %s failed with status %s" % (url, status))
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self.url = url
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self.status = status
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if ENABLE_URLGRABBER:
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import util.urlgrabber
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import util.urlgrabber.keepalive
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util.urlgrabber.keepalive.DEBUG = 0
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def get_url(path, compressed=False):
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try:
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url = path
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if compressed:
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url += '.gz'
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mutter("grab url %s" % url)
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url_f = util.urlgrabber.urlopen(url, keepalive=1, close_connection=0)
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if url_f.status != 200:
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raise GetFailed(url, url_f.status)
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if not compressed:
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return url_f
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else:
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return gzip.GzipFile(fileobj=StringIO(url_f.read()))
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except urllib2.URLError, e:
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raise BzrError("remote fetch failed: %r: %s" % (url, e))
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else:
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def get_url(url, compressed=False):
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import urllib2
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if compressed:
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url += '.gz'
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mutter("get_url %s" % url)
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url_f = urllib2.urlopen(url)
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if compressed:
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return gzip.GzipFile(fileobj=StringIO(url_f.read()))
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else:
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return url_f
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def _find_remote_root(url):
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"""Return the prefix URL that corresponds to the branch root."""
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orig_url = url
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while True:
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try:
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fmt_url = url + '/.bzr/branch-format'
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ff = get_url(fmt_url)
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fmt = ff.read()
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ff.close()
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if fmt != BZR_BRANCH_FORMAT_5:
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raise BzrError("sorry, branch format %r not supported at url %s"
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% (fmt, url))
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return url
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except urllib2.URLError:
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pass
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scheme, host, path = list(urlparse.urlparse(url))[:3]
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# discard params, query, fragment
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# strip off one component of the path component
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idx = path.rfind('/')
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if idx == -1 or path == '/':
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raise BzrError('no branch root found for URL %s'
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' or enclosing directories'
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% orig_url)
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path = path[:idx]
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url = urlparse.urlunparse((scheme, host, path, '', '', ''))
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class RemoteBranch(LocalBranch):
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def __init__(self, baseurl, find_root=True):
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"""Create new proxy for a remote branch."""
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if find_root:
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self.base = _find_remote_root(baseurl)
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else:
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self.base = baseurl
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self._check_format(False)
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# is guaranteed to be a v5 store
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cfn = self.controlfilename
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assert self._branch_format == 5
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self.control_weaves = WeaveStore(cfn([]), get_url)
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self.weave_store = WeaveStore(cfn('weaves'), get_url)
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self.revision_store = RemoteStore(cfn('revision-store'))
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def __str__(self):
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b = getattr(self, 'baseurl', 'undefined')
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return '%s(%r)' % (self.__class__.__name__, b)
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__repr__ = __str__
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def setup_caching(self, cache_root):
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"""Set up cached stores located under cache_root"""
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from bzrlib.meta_store import CachedStore
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for store_name in ('inventory_store', 'text_store', 'revision_store'):
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if not isinstance(getattr(self, store_name), CachedStore):
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cache_path = os.path.join(cache_root, store_name)
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os.mkdir(cache_path)
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new_store = CachedStore(getattr(self, store_name), cache_path)
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setattr(self, store_name, new_store)
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def controlfile(self, filename, mode):
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if mode not in ('rb', 'rt', 'r'):
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raise BzrError("file mode %r not supported for remote branches" % mode)
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return get_url(self.base + '/.bzr/' + filename, False)
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def lock_read(self):
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# no locking for remote branches yet
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pass
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def lock_write(self):
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from errors import LockError
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raise LockError("write lock not supported for remote branch %s"
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% self.base)
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def unlock(self):
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pass
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def relpath(self, path):
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if not path.startswith(self.base):
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raise BzrError('path %r is not under base URL %r'
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% (path, self.base))
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pl = len(self.base)
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return path[pl:].lstrip('/')
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def get_revision(self, revision_id):
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try:
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revf = self.revision_store[revision_id]
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except KeyError:
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raise NoSuchRevision(self, revision_id)
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r = serializer_v5.read_revision(revf)
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if r.revision_id != revision_id:
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raise BzrCheckError('revision stored as {%s} actually contains {%s}'
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% (revision_id, r.revision_id))
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return r
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class RemoteStore(object):
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def __init__(self, baseurl):
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self._baseurl = baseurl
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def _path(self, name):
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if '/' in name:
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raise ValueError('invalid store id', name)
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return self._baseurl + '/' + name
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def __contains__(self, fileid):
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try:
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self[fileid]
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return True
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except KeyError:
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return False
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def __getitem__(self, fileid):
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p = self._path(fileid)
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try:
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return get_url(p, compressed=True)
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except urllib2.URLError:
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pass
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try:
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return get_url(p, compressed=False)
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except urllib2.URLError:
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raise KeyError(fileid)
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