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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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import urllib, urllib2
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import bzrlib # for the version
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from bzrlib.errors import BzrError
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from bzrlib.trace import mutter
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from bzrlib.transport import register_urlparse_netloc_protocol
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from bzrlib.transport.http import HttpTransportBase, extract_auth, HttpServer
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from bzrlib.errors import (TransportNotPossible, NoSuchFile,
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TransportError, ConnectionError)
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register_urlparse_netloc_protocol('http+urllib')
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class Request(urllib2.Request):
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"""Request object for urllib2 that allows the method to be overridden."""
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if self.method is not None:
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return urllib2.Request.get_method(self)
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class HttpTransport_urllib(HttpTransportBase):
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"""Python urllib transport for http and https.
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# TODO: Implement pipelined versions of all of the *_multi() functions.
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def __init__(self, base):
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"""Set the base path where files will be stored."""
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super(HttpTransport_urllib, self).__init__(base)
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def _get(self, relpath, ranges):
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path = self._real_abspath(relpath)
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response = self._get_url_impl(path, method='GET', ranges=ranges)
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return response.code, response
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except urllib2.HTTPError, e:
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mutter('url error code: %s for has url: %r', e.code, path)
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raise NoSuchFile(path, extra=e)
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except (BzrError, IOError), e:
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if hasattr(e, 'errno'):
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mutter('io error: %s %s for has url: %r',
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e.errno, errno.errorcode.get(e.errno), path)
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if e.errno == errno.ENOENT:
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raise NoSuchFile(path, extra=e)
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raise ConnectionError(msg = "Error retrieving %s: %s"
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% (self.abspath(relpath), str(e)),
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def _get_url_impl(self, url, method, ranges):
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"""Actually pass get request into urllib
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:returns: urllib Response object
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mutter("get_url %s [%s]" % (url, range_string))
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manager = urllib2.HTTPPasswordMgrWithDefaultRealm()
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url = extract_auth(url, manager)
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auth_handler = urllib2.HTTPBasicAuthHandler(manager)
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opener = urllib2.build_opener(auth_handler)
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request = Request(url)
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request.method = method
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request.add_header('Pragma', 'no-cache')
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request.add_header('Cache-control', 'max-age=0')
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request.add_header('User-Agent', 'bzr/%s (urllib)' % bzrlib.__version__)
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assert len(ranges) == 1
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request.add_header('Range', 'bytes=%d-%d' % ranges[0])
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response = opener.open(request)
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def should_cache(self):
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"""Return True if the data pulled across should be cached locally.
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from cStringIO import StringIO
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from bzrlib.transport import http
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# TODO: handle_response should be integrated into the http/__init__.py
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from bzrlib.transport.http.response import handle_response
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from bzrlib.transport.http._urllib2_wrappers import (
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class HttpTransport_urllib(http.HttpTransportBase):
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"""Python urllib transport for http and https."""
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# In order to debug we have to issue our traces in sync with
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# httplib, which use print :(
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_opener_class = Opener
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def __init__(self, base, _from_transport=None):
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super(HttpTransport_urllib, self).__init__(
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base, _from_transport=_from_transport)
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if _from_transport is not None:
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self._opener = _from_transport._opener
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self._opener = self._opener_class()
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def _perform(self, request):
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"""Send the request to the server and handles common errors.
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:returns: urllib2 Response object
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connection = self._get_connection()
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if connection is not None:
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# Give back shared info
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request.connection = connection
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(auth, proxy_auth) = self._get_credentials()
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# Clean the httplib.HTTPConnection pipeline in case the previous
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# request couldn't do it
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connection.cleanup_pipe()
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# First request, initialize credentials.
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# scheme and realm will be set by the _urllib2_wrappers.AuthHandler
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auth = self._create_auth()
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# Proxy initialization will be done by the first proxied request
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# Ensure authentication info is provided
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request.proxy_auth = proxy_auth
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if self._debuglevel > 0:
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print 'perform: %s base: %s, url: %s' % (request.method, self.base,
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request.get_full_url())
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response = self._opener.open(request)
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if self._get_connection() is not request.connection:
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# First connection or reconnection
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self._set_connection(request.connection,
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(request.auth, request.proxy_auth))
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# http may change the credentials while keeping the
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self._update_credentials((request.auth, request.proxy_auth))
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if request.follow_redirections is False \
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and code in (301, 302, 303, 307):
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raise errors.RedirectRequested(request.get_full_url(),
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request.redirected_to,
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is_permanent=(code == 301),
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qual_proto=self._scheme)
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if request.redirected_to is not None:
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trace.mutter('redirected from: %s to: %s' % (request.get_full_url(),
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request.redirected_to))
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def _get(self, relpath, offsets, tail_amount=0):
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"""See HttpTransport._get"""
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abspath = self._remote_path(relpath)
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accepted_errors = [200, 404]
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if offsets or tail_amount:
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range_header = self._attempted_range_header(offsets, tail_amount)
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if range_header is not None:
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accepted_errors.append(206)
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accepted_errors.append(400)
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accepted_errors.append(416)
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bytes = 'bytes=' + range_header
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headers = {'Range': bytes}
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request = Request('GET', abspath, None, headers,
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accepted_errors=accepted_errors)
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response = self._perform(request)
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if code == 404: # not found
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raise errors.NoSuchFile(abspath)
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elif code in (400, 416):
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# We don't know which, but one of the ranges we specified was
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raise errors.InvalidHttpRange(abspath, range_header,
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'Server return code %d' % code)
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data = handle_response(abspath, code, response.info(), response)
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def _post(self, body_bytes):
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abspath = self._remote_path('.bzr/smart')
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# We include 403 in accepted_errors so that send_http_smart_request can
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# handle a 403. Otherwise a 403 causes an unhandled TransportError.
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response = self._perform(Request('POST', abspath, body_bytes,
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accepted_errors=[200, 403]))
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data = handle_response(abspath, code, response.info(), response)
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def _head(self, relpath):
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"""Request the HEAD of a file.
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Performs the request and leaves callers handle the results.
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abspath = self._remote_path(relpath)
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request = Request('HEAD', abspath,
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accepted_errors=[200, 404])
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response = self._perform(request)
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def has(self, relpath):
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"""Does the target location exist?
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abspath = self._real_abspath(relpath)
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f = self._get_url_impl(abspath, 'HEAD', [])
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# Without the read and then close()
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# we tend to have busy sockets.
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response = self._head(relpath)
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if code == 200: # "ok",
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except urllib2.URLError, e:
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mutter('url error code: %s for has url: %r', e.code, abspath)
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mutter('io error: %s %s for has url: %r',
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e.errno, errno.errorcode.get(e.errno), abspath)
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if e.errno == errno.ENOENT:
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raise TransportError(orig_error=e)
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def copy_to(self, relpaths, other, mode=None, pb=None):
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"""Copy a set of entries from self into another Transport.
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:param relpaths: A list/generator of entries to be copied.
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TODO: if other is LocalTransport, is it possible to
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do better than put(get())?
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# At this point HttpTransport_urllib might be able to check and see if
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# the remote location is the same, and rather than download, and
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# then upload, it could just issue a remote copy_this command.
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if isinstance(other, HttpTransport_urllib):
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raise TransportNotPossible('http cannot be the target of copy_to()')
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return super(HttpTransport_urllib, self).copy_to(relpaths, other, mode=mode, pb=pb)
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def move(self, rel_from, rel_to):
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"""Move the item at rel_from to the location at rel_to"""
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raise TransportNotPossible('http does not support move()')
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def delete(self, relpath):
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"""Delete the item at relpath"""
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raise TransportNotPossible('http does not support delete()')
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class HttpServer_urllib(HttpServer):
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"""Subclass of HttpServer that gives http+urllib urls.
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This is for use in testing: connections to this server will always go
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through urllib where possible.
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# urls returned by this server should require the urllib client impl
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_url_protocol = 'http+urllib'
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def get_test_permutations():
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"""Return the permutations to be used in testing."""
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from bzrlib.tests.http_server import HttpServer_urllib
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return [(HttpTransport_urllib, HttpServer_urllib),
added
removed
bzrlib/transport/http/_urllib.py
