Rev 3309: Move smart protocol version query logic into the medium, in file:///home/pqm/archives/thelove/bzr/%2Btrunk/

Canonical.com Patch Queue Manager pqm at pqm.ubuntu.com
Thu Mar 27 02:21:47 GMT 2008


At file:///home/pqm/archives/thelove/bzr/%2Btrunk/

------------------------------------------------------------
revno: 3309
revision-id:pqm at pqm.ubuntu.com-20080327022136-3r7xq97mm5j5s1x6
parent: pqm at pqm.ubuntu.com-20080326124829-ggl5f8711x321ahw
parent: andrew.bennetts at canonical.com-20080326221509-ggzura2egh8msa3z
committer: Canonical.com Patch Queue Manager <pqm at pqm.ubuntu.com>
branch nick: +trunk
timestamp: Thu 2008-03-27 02:21:36 +0000
message:
  Move smart protocol version query logic into the medium,
  	so that we no longer make redundant version queries. (Andrew Bennetts)
modified:
  NEWS                           NEWS-20050323055033-4e00b5db738777ff
  bzrlib/bzrdir.py               bzrdir.py-20060131065624-156dfea39c4387cb
  bzrlib/errors.py               errors.py-20050309040759-20512168c4e14fbd
  bzrlib/smart/medium.py         medium.py-20061103051856-rgu2huy59fkz902q-1
  bzrlib/tests/test_fetch.py     testfetch.py-20050825090644-f73e07e7dfb1765a
  bzrlib/tests/test_remote.py    test_remote.py-20060720103555-yeeg2x51vn0rbtdp-2
  bzrlib/tests/test_transport_implementations.py test_transport_implementations.py-20051227111451-f97c5c7d5c49fce7
  bzrlib/transport/__init__.py   transport.py-20050711165921-4978aa7ce1285ad5
  bzrlib/transport/http/__init__.py http_transport.py-20050711212304-506c5fd1059ace96
    ------------------------------------------------------------
    revno: 3241.1.8
    revision-id:andrew.bennetts at canonical.com-20080326221509-ggzura2egh8msa3z
    parent: andrew.bennetts at canonical.com-20080326220305-4cur6a0c9kmyyn6c
    committer: Andrew Bennetts <andrew.bennetts at canonical.com>
    branch nick: protocol-versioning-logic-into-medium
    timestamp: Thu 2008-03-27 09:15:09 +1100
    message:
      Add NEWS entry.
    modified:
      NEWS                           NEWS-20050323055033-4e00b5db738777ff
    ------------------------------------------------------------
    revno: 3241.1.7
    revision-id:andrew.bennetts at canonical.com-20080326220305-4cur6a0c9kmyyn6c
    parent: andrew.bennetts at canonical.com-20080326220030-91y3ze0721oix2bz
    committer: Andrew Bennetts <andrew.bennetts at canonical.com>
    branch nick: protocol-versioning-logic-into-medium
    timestamp: Thu 2008-03-27 09:03:05 +1100
    message:
      Remove unused imports from bzrlib/transport/__init__.py.
    modified:
      bzrlib/transport/__init__.py   transport.py-20050711165921-4978aa7ce1285ad5
    ------------------------------------------------------------
    revno: 3241.1.6
    revision-id:andrew.bennetts at canonical.com-20080326220030-91y3ze0721oix2bz
    parent: andrew.bennetts at canonical.com-20080326214402-cpdwd79w1uu2c8un
    committer: Andrew Bennetts <andrew.bennetts at canonical.com>
    branch nick: protocol-versioning-logic-into-medium
    timestamp: Thu 2008-03-27 09:00:30 +1100
    message:
      Deprecate Transport.get_smart_client and errors.NoSmartServer, as these are now unused.
    modified:
      bzrlib/errors.py               errors.py-20050309040759-20512168c4e14fbd
      bzrlib/tests/test_remote.py    test_remote.py-20060720103555-yeeg2x51vn0rbtdp-2
      bzrlib/tests/test_transport_implementations.py test_transport_implementations.py-20051227111451-f97c5c7d5c49fce7
      bzrlib/transport/__init__.py   transport.py-20050711165921-4978aa7ce1285ad5
    ------------------------------------------------------------
    revno: 3241.1.5
    revision-id:andrew.bennetts at canonical.com-20080326214402-cpdwd79w1uu2c8un
    parent: andrew.bennetts at canonical.com-20080326095048-8eo3qp3w4rhamtt4
    committer: Andrew Bennetts <andrew.bennetts at canonical.com>
    branch nick: protocol-versioning-logic-into-medium
    timestamp: Thu 2008-03-27 08:44:02 +1100
    message:
      Add comment suggested by Robert.
    modified:
      bzrlib/tests/test_fetch.py     testfetch.py-20050825090644-f73e07e7dfb1765a
    ------------------------------------------------------------
    revno: 3241.1.4
    revision-id:andrew.bennetts at canonical.com-20080326095048-8eo3qp3w4rhamtt4
    parent: andrew.bennetts at canonical.com-20080326064904-3ja75n1zbggmgx5w
    committer: Andrew Bennetts <andrew.bennetts at canonical.com>
    branch nick: protocol-versioning-logic-into-medium
    timestamp: Wed 2008-03-26 20:50:48 +1100
    message:
      Use get_smart_medium as suggested by Robert, and deal with the fallout.
    modified:
      bzrlib/bzrdir.py               bzrdir.py-20060131065624-156dfea39c4387cb
      bzrlib/smart/medium.py         medium.py-20061103051856-rgu2huy59fkz902q-1
      bzrlib/tests/test_fetch.py     testfetch.py-20050825090644-f73e07e7dfb1765a
      bzrlib/transport/http/__init__.py http_transport.py-20050711212304-506c5fd1059ace96
    ------------------------------------------------------------
    revno: 3241.1.3
    revision-id:andrew.bennetts at canonical.com-20080326064904-3ja75n1zbggmgx5w
    parent: andrew.bennetts at canonical.com-20080228142120-0kxund2mhm7ne5sh
    parent: pqm at pqm.ubuntu.com-20080326030652-vgwdkwda9mi8s200
    committer: Andrew Bennetts <andrew.bennetts at canonical.com>
    branch nick: protocol-versioning-logic-into-medium
    timestamp: Wed 2008-03-26 17:49:04 +1100
    message:
      Merge bzr.dev.
    added:
      bzrlib/directory_service.py    directory_service.py-20080305221044-vr2mkvlsk8jypa2y-1
      bzrlib/tests/blackbox/test_hooks.py test_hooks.py-20080308163236-xljgf9j41hik1x21-1
      bzrlib/tests/test_directory_service.py test_directory_servi-20080305221044-vr2mkvlsk8jypa2y-2
      bzrlib/tests/test_uncommit.py  test_uncommit.py-20080316104338-y3gxu67g5m2qih10-1
      bzrlib/tests/tree_implementations/test_annotate_iter.py test_annotate_iter.p-20080315092519-h4dc43rntmfmq16d-1
      doc/en/admin-guide/            docenadminguide-20080305135054-y7y2c986yf94zljn-1
      doc/en/admin-guide/index.txt   index.txt-20080305140741-ecw0lap8dxkxc05g-1
    renamed:
      bzrlib/plugins/launchpad/lp_indirect.py => bzrlib/plugins/launchpad/lp_directory.py lp_indirect.py-20070126012204-de5rugwlt22c7u7e-1
      bzrlib/plugins/launchpad/test_lp_indirect.py => bzrlib/plugins/launchpad/test_lp_directory.py test_lp_indirect.py-20070126002743-oyle362tzv9cd8mi-1
    modified:
      NEWS                           NEWS-20050323055033-4e00b5db738777ff
      README                         README-20050309040720-8f368abf9f346b9d
      bzr                            bzr.py-20050313053754-5485f144c7006fa6
      bzrlib/__init__.py             __init__.py-20050309040759-33e65acf91bbcd5d
      bzrlib/_knit_load_data_c.pyx   knit_c.pyx-20070509143944-u42gy8w387a10m0j-1
      bzrlib/_knit_load_data_py.py   _knit_load_data_py.p-20070629000948-9a0nh4s118bi5y8n-1
      bzrlib/annotate.py             annotate.py-20050922133147-7c60541d2614f022
      bzrlib/branch.py               branch.py-20050309040759-e4baf4e0d046576e
      bzrlib/builtins.py             builtins.py-20050830033751-fc01482b9ca23183
      bzrlib/bundle/__init__.py      changeset.py-20050513021216-b02ab57fb9738913
      bzrlib/bundle/serializer/v4.py v10.py-20070611062757-5ggj7k18s9dej0fr-1
      bzrlib/bzrdir.py               bzrdir.py-20060131065624-156dfea39c4387cb
      bzrlib/cmd_version_info.py     __init__.py-20051228204928-697d01fdca29c99b
      bzrlib/debug.py                debug.py-20061102062349-vdhrw9qdpck8cl35-1
      bzrlib/delta.py                delta.py-20050729221636-54cf14ef94783d0a
      bzrlib/deprecated_graph.py     graph.py-20050905070950-b47dce53236c5e48
      bzrlib/diff.py                 diff.py-20050309040759-26944fbbf2ebbf36
      bzrlib/dirstate.py             dirstate.py-20060728012006-d6mvoihjb3je9peu-1
      bzrlib/errors.py               errors.py-20050309040759-20512168c4e14fbd
      bzrlib/fetch.py                fetch.py-20050818234941-26fea6105696365d
      bzrlib/graph.py                graph_walker.py-20070525030359-y852guab65d4wtn0-1
      bzrlib/help_topics/__init__.py help_topics.py-20060920210027-rnim90q9e0bwxvy4-1
      bzrlib/knit.py                 knit.py-20051212171256-f056ac8f0fbe1bd9
      bzrlib/log.py                  log.py-20050505065812-c40ce11702fe5fb1
      bzrlib/mail_client.py          mail_client.py-20070809192806-vuxt3t19srtpjpdn-1
      bzrlib/merge.py                merge.py-20050513021216-953b65a438527106
      bzrlib/merge3.py               merge3.py-20050704130834-bf0597094828a2e1
      bzrlib/merge_directive.py      merge_directive.py-20070228184838-ja62280spt1g7f4x-1
      bzrlib/missing.py              missing.py-20050812153334-097f7097e2a8bcd1
      bzrlib/multiparent.py          __init__.py-20070410133617-n1jdhcc1n1mibarp-1
      bzrlib/option.py               option.py-20051014052914-661fb36e76e7362f
      bzrlib/plugin.py               plugin.py-20050622060424-829b654519533d69
      bzrlib/plugins/launchpad/__init__.py __init__.py-20060315182712-2d5feebd2a1032dc
      bzrlib/plugins/launchpad/lp_registration.py lp_registration.py-20060315190948-daa617eafe3a8d48
      bzrlib/reconcile.py            reweave_inventory.py-20051108164726-1e5e0934febac06e
      bzrlib/registry.py             lazy_factory.py-20060809213415-2gfvqadtvdn0phtg-1
      bzrlib/remote.py               remote.py-20060720103555-yeeg2x51vn0rbtdp-1
      bzrlib/repofmt/knitrepo.py     knitrepo.py-20070206081537-pyy4a00xdas0j4pf-1
      bzrlib/repofmt/pack_repo.py    pack_repo.py-20070813041115-gjv5ma7ktfqwsjgn-1
      bzrlib/repofmt/weaverepo.py    presplitout.py-20070125045333-wfav3tsh73oxu3zk-1
      bzrlib/repository.py           rev_storage.py-20051111201905-119e9401e46257e3
      bzrlib/revision.py             revision.py-20050309040759-e77802c08f3999d5
      bzrlib/revisionspec.py         revisionspec.py-20050907152633-17567659fd5c0ddb
      bzrlib/smart/client.py         client.py-20061116014825-2k6ada6xgulslami-1
      bzrlib/smart/repository.py     repository.py-20061128022038-vr5wy5bubyb8xttk-1
      bzrlib/status.py               status.py-20050505062338-431bfa63ec9b19e6
      bzrlib/symbol_versioning.py    symbol_versioning.py-20060105104851-9ecf8af605d15a80
      bzrlib/tests/__init__.py       selftest.py-20050531073622-8d0e3c8845c97a64
      bzrlib/tests/blackbox/__init__.py __init__.py-20051128053524-eba30d8255e08dc3
      bzrlib/tests/blackbox/test_merge.py test_merge.py-20060323225809-9bc0459c19917f41
      bzrlib/tests/blackbox/test_mv.py test_mv.py-20060705114902-33tkxz0o9cdshemo-1
      bzrlib/tests/blackbox/test_pull.py test_pull.py-20051201144907-64959364f629947f
      bzrlib/tests/blackbox/test_push.py test_push.py-20060329002750-929af230d5d22663
      bzrlib/tests/blackbox/test_send.py test_bundle.py-20060616222707-c21c8b7ea5ef57b1
      bzrlib/tests/blackbox/test_uncommit.py test_uncommit.py-20051027212835-84944b63adae51be
      bzrlib/tests/blackbox/test_upgrade.py test_upgrade.py-20060120060132-b41e5ed2f886ad28
      bzrlib/tests/blackbox/test_version_info.py test_bb_version_info.py-20051228204928-91711c6559d952f7
      bzrlib/tests/branch_implementations/test_branch.py testbranch.py-20050711070244-121d632bc37d7253
      bzrlib/tests/branch_implementations/test_commit.py test_commit.py-20070206022134-117z1i5b644p63r0-1
      bzrlib/tests/branch_implementations/test_revision_history.py test_revision_histor-20070326062311-v7co92liyuchb80w-1
      bzrlib/tests/bzrdir_implementations/test_bzrdir.py test_bzrdir.py-20060131065642-0ebeca5e30e30866
      bzrlib/tests/intertree_implementations/test_compare.py test_compare.py-20060724101752-09ysswo1a92uqyoz-2
      bzrlib/tests/interversionedfile_implementations/test_join.py test_join.py-20060302012326-9b5e9b0f0a03fedc
      bzrlib/tests/repository_implementations/test_check_reconcile.py test_broken.py-20070928125406-62236394w0jpbpd6-2
      bzrlib/tests/repository_implementations/test_iter_reverse_revision_history.py test_iter_reverse_re-20070217015036-spu7j5ggch7pbpyd-1
      bzrlib/tests/repository_implementations/test_repository.py test_repository.py-20060131092128-ad07f494f5c9d26c
      bzrlib/tests/test_annotate.py  test_annotate.py-20061213215015-sttc9agsxomls7q0-1
      bzrlib/tests/test_bundle.py    test.py-20050630184834-092aa401ab9f039c
      bzrlib/tests/test_commit.py    test_commit.py-20050914060732-279f057f8c295434
      bzrlib/tests/test_diff.py      testdiff.py-20050727164403-d1a3496ebb12e339
      bzrlib/tests/test_errors.py    test_errors.py-20060210110251-41aba2deddf936a8
      bzrlib/tests/test_graph.py     test_graph_walker.py-20070525030405-enq4r60hhi9xrujc-1
      bzrlib/tests/test_knit.py      test_knit.py-20051212171302-95d4c00dd5f11f2b
      bzrlib/tests/test_mail_client.py test_mail_client.py-20070809192806-vuxt3t19srtpjpdn-2
      bzrlib/tests/test_merge.py     testmerge.py-20050905070950-c1b5aa49ff911024
      bzrlib/tests/test_merge3.py    merge3.py-20050704130834-556689114c89e6f2
      bzrlib/tests/test_merge_directive.py test_merge_directive-20070228184838-ja62280spt1g7f4x-2
      bzrlib/tests/test_osutils.py   test_osutils.py-20051201224856-e48ee24c12182989
      bzrlib/tests/test_plugins.py   plugins.py-20050622075746-32002b55e5e943e9
      bzrlib/tests/test_read_bundle.py test_read_bundle.py-20060615211421-ud8cwr1ulgd914zf-1
      bzrlib/tests/test_registry.py  test_lazy_factory.py-20060809213415-2gfvqadtvdn0phtg-2
      bzrlib/tests/test_revision.py  testrevision.py-20050804210559-46f5e1eb67b01289
      bzrlib/tests/test_smart.py     test_smart.py-20061122024551-ol0l0o0oofsu9b3t-2
      bzrlib/tests/test_transform.py test_transaction.py-20060105172520-b3ffb3946550e6c4
      bzrlib/tests/test_tsort.py     testtsort.py-20051025073946-27da871c394d5be4
      bzrlib/tests/test_upgrade.py   test_upgrade.py-20051004040251-555fe1d2bae1bc71
      bzrlib/tests/test_urlutils.py  test_urlutils.py-20060502192900-46b1f9579987cf9c
      bzrlib/tests/test_versionedfile.py test_versionedfile.py-20060222045249-db45c9ed14a1c2e5
      bzrlib/tests/test_workingtree_4.py test_workingtree_4.p-20070223025758-531n3tznl3zacv2o-1
      bzrlib/tests/tree_implementations/__init__.py __init__.py-20060717075546-420s7b0bj9hzeowi-2
      bzrlib/tests/workingtree_implementations/test_locking.py test_locking.py-20060707151933-tav3o2hpibwi53u4-3
      bzrlib/tests/workingtree_implementations/test_merge_from_branch.py test_merge_from_bran-20060904034200-12jxyk2zlhpufxe1-1
      bzrlib/tests/workingtree_implementations/test_parents.py test_set_parents.py-20060807231740-yicmnlci1mj8smu1-1
      bzrlib/trace.py                trace.py-20050309040759-c8ed824bdcd4748a
      bzrlib/transform.py            transform.py-20060105172343-dd99e54394d91687
      bzrlib/transport/__init__.py   transport.py-20050711165921-4978aa7ce1285ad5
      bzrlib/transport/http/_urllib.py _urlgrabber.py-20060113083826-0bbf7d992fbf090c
      bzrlib/transport/http/_urllib2_wrappers.py _urllib2_wrappers.py-20060913231729-ha9ugi48ktx481ao-1
      bzrlib/tree.py                 tree.py-20050309040759-9d5f2496be663e77
      bzrlib/tsort.py                tsort.py-20051025073946-7808f6aaf7d07208
      bzrlib/ui/__init__.py          ui.py-20050824083933-8cf663c763ba53a9
      bzrlib/uncommit.py             uncommit.py-20050626215513-5ec509fa425b305c
      bzrlib/upgrade.py              history2weaves.py-20050818063535-e7d319791c19a8b2
      bzrlib/urlutils.py             urlutils.py-20060502195429-e8a161ecf8fac004
      bzrlib/util/configobj/configobj.py configobj.py-20051018184548-06992a2246425e3e
      bzrlib/util/configobj/docs/configobj.txt configobj.txt-20051018184548-4949b5f17e6a19c7
      bzrlib/util/configobj/docs/validate.txt validate.txt-20051018184548-9e0e5ad913e258f5
      bzrlib/version.py              version.py-20060816024207-ves6ult9a11taj9t-1
      bzrlib/version_info_formats/__init__.py generate_version_info.py-20051228204928-8358edabcddcd97e
      bzrlib/versionedfile.py        versionedfile.py-20060222045106-5039c71ee3b65490
      bzrlib/weave.py                knit.py-20050627021749-759c29984154256b
      bzrlib/workingtree.py          workingtree.py-20050511021032-29b6ec0a681e02e3
      bzrlib/workingtree_4.py        workingtree_4.py-20070208044105-5fgpc5j3ljlh5q6c-1
      doc/developers/lca-merge.txt   lcamerge.txt-20080103061803-9isydn4ivgwrvorw-1
      doc/en/mini-tutorial/index.txt index.txt-20070813141352-2u64ooqzo0or4hss-2
      doc/en/user-guide/hooks.txt    hooks.txt-20070829200551-7nr6e5a1io6x78uf-1
      doc/en/user-guide/resolving_conflicts.txt resolving_conflicts.-20071122141511-0knao2lklsdsvb1q-5
      doc/en/user-guide/version_info.txt version_info.txt-20060921215543-gju6o5xdic8w25np-1
      setup.py                       setup.py-20050314065409-02f8a0a6e3f9bc70
      bzrlib/plugins/launchpad/lp_directory.py lp_indirect.py-20070126012204-de5rugwlt22c7u7e-1
      bzrlib/plugins/launchpad/test_lp_directory.py test_lp_indirect.py-20070126002743-oyle362tzv9cd8mi-1
    ------------------------------------------------------------
    revno: 3241.1.2
    revision-id:andrew.bennetts at canonical.com-20080228142120-0kxund2mhm7ne5sh
    parent: andrew.bennetts at canonical.com-20080228140605-kj7oeq417cxk2l9b
    committer: Andrew Bennetts <andrew.bennetts at canonical.com>
    branch nick: protocol-versioning-api
    timestamp: Fri 2008-02-29 01:21:20 +1100
    message:
      Tidy comments.
    modified:
      bzrlib/bzrdir.py               bzrdir.py-20060131065624-156dfea39c4387cb
      bzrlib/smart/medium.py         medium.py-20061103051856-rgu2huy59fkz902q-1
    ------------------------------------------------------------
    revno: 3241.1.1
    revision-id:andrew.bennetts at canonical.com-20080228140605-kj7oeq417cxk2l9b
    parent: pqm at pqm.ubuntu.com-20080228032258-4mdmqlx603ak6x2w
    committer: Andrew Bennetts <andrew.bennetts at canonical.com>
    branch nick: protocol-versioning-api
    timestamp: Fri 2008-02-29 01:06:05 +1100
    message:
      Shift protocol version querying from RemoteBzrDirFormat into SmartClientMedium.
    modified:
      bzrlib/bzrdir.py               bzrdir.py-20060131065624-156dfea39c4387cb
      bzrlib/smart/medium.py         medium.py-20061103051856-rgu2huy59fkz902q-1
      bzrlib/tests/test_remote.py    test_remote.py-20060720103555-yeeg2x51vn0rbtdp-2
=== modified file 'NEWS'
--- a/NEWS	2008-03-26 10:12:45 +0000
+++ b/NEWS	2008-03-27 02:21:36 +0000
@@ -37,6 +37,11 @@
     * Merge is faster.  We no longer check a file's existence unnecessarily
       when merging the execute bit.  (Aaron Bentley)
 
+    * The smart protocol client is slightly faster, because it now only queries
+      the server for the protocol version once per connection.  Also, the HTTP
+      transport will now automatically use a smart server if one is present.
+      (Andrew Bennetts)
+
   BUGFIXES:
 
     * ``bzr mv a b`` can be now used also to rename previously renamed

=== modified file 'bzrlib/bzrdir.py'
--- a/bzrlib/bzrdir.py	2008-03-12 01:06:03 +0000
+++ b/bzrlib/bzrdir.py	2008-03-26 09:50:48 +0000
@@ -2394,18 +2394,20 @@
     def probe_transport(klass, transport):
         """Return a RemoteBzrDirFormat object if it looks possible."""
         try:
-            client = transport.get_smart_client()
+            medium = transport.get_smart_medium()
         except (NotImplementedError, AttributeError,
-                errors.TransportNotPossible):
+                errors.TransportNotPossible, errors.NoSmartMedium):
             # no smart server, so not a branch for this format type.
             raise errors.NotBranchError(path=transport.base)
         else:
-            # Send a 'hello' request in protocol version one, and decline to
-            # open it if the server doesn't support our required version (2) so
-            # that the VFS-based transport will do it.
-            request = client.get_request()
-            smart_protocol = protocol.SmartClientRequestProtocolOne(request)
-            server_version = smart_protocol.query_version()
+            # Decline to open it if the server doesn't support our required
+            # version (2) so that the VFS-based transport will do it.
+            try:
+                server_version = medium.protocol_version()
+            except errors.SmartProtocolError:
+                # Apparently there's no usable smart server there, even though
+                # the medium supports the smart protocol.
+                raise errors.NotBranchError(path=transport.base)
             if server_version != 2:
                 raise errors.NotBranchError(path=transport.base)
             return klass()

=== modified file 'bzrlib/errors.py'
--- a/bzrlib/errors.py	2008-03-17 22:16:52 +0000
+++ b/bzrlib/errors.py	2008-03-26 22:00:30 +0000
@@ -2182,6 +2182,7 @@
 
     _fmt = "No smart server available at %(url)s"
 
+    @symbol_versioning.deprecated_method(symbol_versioning.one_four)
     def __init__(self, url):
         self.url = url
 

=== modified file 'bzrlib/smart/medium.py'
--- a/bzrlib/smart/medium.py	2008-02-06 03:52:25 +0000
+++ b/bzrlib/smart/medium.py	2008-03-26 09:50:48 +0000
@@ -35,6 +35,7 @@
     )
 from bzrlib.smart.protocol import (
     REQUEST_VERSION_TWO,
+    SmartClientRequestProtocolOne,
     SmartServerRequestProtocolOne,
     SmartServerRequestProtocolTwo,
     )
@@ -368,6 +369,29 @@
 class SmartClientMedium(object):
     """Smart client is a medium for sending smart protocol requests over."""
 
+    def __init__(self):
+        super(SmartClientMedium, self).__init__()
+        self._protocol_version_error = None
+        self._protocol_version = None
+
+    def protocol_version(self):
+        """Find out the best protocol version to use."""
+        if self._protocol_version_error is not None:
+            raise self._protocol_version_error
+        if self._protocol_version is None:
+            try:
+                medium_request = self.get_request()
+                # Send a 'hello' request in protocol version one, for maximum
+                # backwards compatibility.
+                client_protocol = SmartClientRequestProtocolOne(medium_request)
+                self._protocol_version = client_protocol.query_version()
+            except errors.SmartProtocolError, e:
+                # Cache the error, just like we would cache a successful
+                # result.
+                self._protocol_version_error = e
+                raise
+        return self._protocol_version
+
     def disconnect(self):
         """If this medium maintains a persistent connection, close it.
         
@@ -385,6 +409,7 @@
     """
 
     def __init__(self):
+        SmartClientMedium.__init__(self)
         self._current_request = None
         # Be optimistic: we assume the remote end can accept new remote
         # requests until we get an error saying otherwise.  (1.2 adds some

=== modified file 'bzrlib/tests/test_fetch.py'
--- a/bzrlib/tests/test_fetch.py	2007-12-11 14:26:18 +0000
+++ b/bzrlib/tests/test_fetch.py	2008-03-26 21:44:02 +0000
@@ -296,8 +296,14 @@
                                                      http_logs))
         # FIXME naughty poking in there.
         self.get_readonly_server().logs = []
-        # check there is nothing more to fetch
-        source = Branch.open(self.get_readonly_url("source/"))
+        # check there is nothing more to fetch.  We take care to re-use the
+        # existing transport so that the request logs we're about to examine
+        # aren't cluttered with redundant probes for a smart server.
+        # XXX: Perhaps this further parameterisation: test http with smart
+        # server, and test http without smart server?
+        source = Branch.open(
+            self.get_readonly_url("source/"),
+            possible_transports=[source.bzrdir.root_transport])
         self.assertEqual(target.fetch(source), (0, []))
         # should make just two requests
         http_logs = self.get_readonly_server().logs

=== modified file 'bzrlib/tests/test_remote.py'
--- a/bzrlib/tests/test_remote.py	2008-02-12 05:17:25 +0000
+++ b/bzrlib/tests/test_remote.py	2008-03-26 22:00:30 +0000
@@ -55,7 +55,6 @@
         self.transport_server = server.SmartTCPServer_for_testing
         super(BasicRemoteObjectTests, self).setUp()
         self.transport = self.get_transport()
-        self.client = self.transport.get_smart_client()
         # make a branch that can be opened over the smart transport
         self.local_wt = BzrDir.create_standalone_workingtree('.')
 
@@ -301,6 +300,9 @@
             input_file, output_file)
         return medium.SmartClientStreamMediumRequest(client_medium)
 
+    def protocol_version(self):
+        return 1
+
 
 class OldServerTransport(object):
     """A fake transport for test_old_server that reports it's smart server

=== modified file 'bzrlib/tests/test_transport_implementations.py'
--- a/bzrlib/tests/test_transport_implementations.py	2008-02-25 07:28:29 +0000
+++ b/bzrlib/tests/test_transport_implementations.py	2008-03-26 22:00:30 +0000
@@ -38,7 +38,6 @@
                            FileExists,
                            InvalidURL,
                            LockError,
-                           NoSmartServer,
                            NoSuchFile,
                            NotLocalUrl,
                            PathError,

=== modified file 'bzrlib/transport/__init__.py'
--- a/bzrlib/transport/__init__.py	2008-03-06 14:12:45 +0000
+++ b/bzrlib/transport/__init__.py	2008-03-26 22:03:05 +0000
@@ -33,14 +33,10 @@
 from bzrlib.lazy_import import lazy_import
 lazy_import(globals(), """
 import errno
-from collections import deque
 from stat import S_ISDIR
-import unittest
 import urllib
 import urlparse
-import warnings
 
-import bzrlib
 from bzrlib import (
     errors,
     osutils,
@@ -50,18 +46,14 @@
 """)
 
 from bzrlib.symbol_versioning import (
-        deprecated_passed,
         deprecated_method,
         deprecated_function,
         DEPRECATED_PARAMETER,
-        zero_eight,
-        zero_eleven,
+        one_four,
         zero_ninety,
         )
 from bzrlib.trace import (
-    note,
     mutter,
-    warning,
     )
 from bzrlib import registry
 
@@ -613,6 +605,7 @@
         """
         return self.get(relpath).read()
 
+    @deprecated_method(one_four)
     def get_smart_client(self):
         """Return a smart client for this transport if possible.
 

=== modified file 'bzrlib/transport/http/__init__.py'
--- a/bzrlib/transport/http/__init__.py	2008-01-02 14:13:55 +0000
+++ b/bzrlib/transport/http/__init__.py	2008-03-26 09:50:48 +0000
@@ -514,8 +514,14 @@
         return ','.join(strings)
 
     def send_http_smart_request(self, bytes):
-        code, body_filelike = self._post(bytes)
-        assert code == 200, 'unexpected HTTP response code %r' % (code,)
+        try:
+            code, body_filelike = self._post(bytes)
+            if code != 200:
+                raise InvalidHttpResponse(
+                    self._remote_path('.bzr/smart'),
+                    'Expected 200 response code, got %r' % (code,))
+        except errors.InvalidHttpResponse, e:
+            raise errors.SmartProtocolError(str(e))
         return body_filelike
 
 




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