1
# Copyright (C) 2005 Canonical Ltd
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16
"""Implementation of Transport over http.
19
from bzrlib.transport import Transport, register_transport
20
from bzrlib.errors import (TransportNotPossible, NoSuchFile,
21
NonRelativePath, TransportError)
23
from cStringIO import StringIO
27
from bzrlib.errors import BzrError, BzrCheckError
28
from bzrlib.branch import Branch
29
from bzrlib.trace import mutter
34
mutter("get_url %s" % url)
35
url_f = urllib2.urlopen(url)
38
class HttpTransportError(TransportError):
41
class HttpTransport(Transport):
42
"""This is the transport agent for http:// access.
44
TODO: Implement pipelined versions of all of the *_multi() functions.
47
def __init__(self, base):
48
"""Set the base path where files will be stored."""
49
assert base.startswith('http://') or base.startswith('https://')
50
super(HttpTransport, self).__init__(base)
51
# In the future we might actually connect to the remote host
52
# rather than using get_url
53
# self._connection = None
54
(self._proto, self._host,
55
self._path, self._parameters,
56
self._query, self._fragment) = urlparse.urlparse(self.base)
58
def should_cache(self):
59
"""Return True if the data pulled across should be cached locally.
63
def clone(self, offset=None):
64
"""Return a new HttpTransport with root at self.base + offset
65
For now HttpTransport does not actually connect, so just return
66
a new HttpTransport object.
69
return HttpTransport(self.base)
71
return HttpTransport(self.abspath(offset))
73
def abspath(self, relpath):
74
"""Return the full url to the given relative path.
75
This can be supplied with a string or a list
77
assert isinstance(relpath, basestring)
78
if isinstance(relpath, basestring):
79
relpath_parts = relpath.split('/')
81
# TODO: Don't call this with an array - no magic interfaces
82
relpath_parts = relpath[:]
83
if len(relpath_parts) > 1:
84
if relpath_parts[0] == '':
85
raise ValueError("path %r within branch %r seems to be absolute"
86
% (relpath, self._path))
87
if relpath_parts[-1] == '':
88
raise ValueError("path %r within branch %r seems to be a directory"
89
% (relpath, self._path))
90
basepath = self._path.split('/')
91
if len(basepath) > 0 and basepath[-1] == '':
92
basepath = basepath[:-1]
93
for p in relpath_parts:
95
if len(basepath) == 0:
96
# In most filesystems, a request for the parent
97
# of root, just returns root.
100
elif p == '.' or p == '':
104
# Possibly, we could use urlparse.urljoin() here, but
105
# I'm concerned about when it chooses to strip the last
106
# portion of the path, and when it doesn't.
107
path = '/'.join(basepath)
108
return urlparse.urlunparse((self._proto,
109
self._host, path, '', '', ''))
111
def has(self, relpath):
112
"""Does the target location exist?
114
TODO: HttpTransport.has() should use a HEAD request,
115
not a full GET request.
117
TODO: This should be changed so that we don't use
118
urllib2 and get an exception, the code path would be
119
cleaner if we just do an http HEAD request, and parse
123
f = get_url(self.abspath(relpath))
124
# Without the read and then close()
125
# we tend to have busy sockets.
129
except urllib2.URLError, e:
134
if e.errno == errno.ENOENT:
136
raise HttpTransportError(orig_error=e)
138
def get(self, relpath, decode=False):
139
"""Get the file at the given relative path.
141
:param relpath: The relative path to the file
144
return get_url(self.abspath(relpath))
145
except urllib2.URLError, e:
147
raise NoSuchFile(msg = "Error retrieving %s: %s"
148
% (self.abspath(relpath), str(e)),
151
except (BzrError, IOError), e:
152
raise NoSuchFile(msg = "Error retrieving %s: %s"
153
% (self.abspath(relpath), str(e)),
156
def put(self, relpath, f):
157
"""Copy the file-like or string object into the location.
159
:param relpath: Location to put the contents, relative to base.
160
:param f: File-like or string object.
162
raise TransportNotPossible('http PUT not supported')
164
def mkdir(self, relpath):
165
"""Create a directory at the given path."""
166
raise TransportNotPossible('http does not support mkdir()')
168
def append(self, relpath, f):
169
"""Append the text in the file-like object into the final
172
raise TransportNotPossible('http does not support append()')
174
def copy(self, rel_from, rel_to):
175
"""Copy the item at rel_from to the location at rel_to"""
176
raise TransportNotPossible('http does not support copy()')
178
def copy_to(self, relpaths, other, pb=None):
179
"""Copy a set of entries from self into another Transport.
181
:param relpaths: A list/generator of entries to be copied.
183
TODO: if other is LocalTransport, is it possible to
184
do better than put(get())?
186
# At this point HttpTransport might be able to check and see if
187
# the remote location is the same, and rather than download, and
188
# then upload, it could just issue a remote copy_this command.
189
if isinstance(other, HttpTransport):
190
raise TransportNotPossible('http cannot be the target of copy_to()')
192
return super(HttpTransport, self).copy_to(relpaths, other, pb=pb)
194
def move(self, rel_from, rel_to):
195
"""Move the item at rel_from to the location at rel_to"""
196
raise TransportNotPossible('http does not support move()')
198
def delete(self, relpath):
199
"""Delete the item at relpath"""
200
raise TransportNotPossible('http does not support delete()')
203
"""See Transport.listable."""
206
def stat(self, relpath):
207
"""Return the stat information for a file.
209
raise TransportNotPossible('http does not support stat()')
211
def lock_read(self, relpath):
212
"""Lock the given file for shared (read) access.
213
:return: A lock object, which should be passed to Transport.unlock()
215
# The old RemoteBranch ignore lock for reading, so we will
216
# continue that tradition and return a bogus lock object.
217
class BogusLock(object):
218
def __init__(self, path):
222
return BogusLock(relpath)
224
def lock_write(self, relpath):
225
"""Lock the given file for exclusive (write) access.
226
WARNING: many transports do not support this, so trying avoid using it
228
:return: A lock object, which should be passed to Transport.unlock()
230
raise TransportNotPossible('http does not support lock_write()')
added
removed
bzrlib/transport/http.py
