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Viewing changes to bzrlib/smart/protocol.py

  • Committer: Canonical.com Patch Queue Manager
  • Date: 2009-04-09 20:23:07 UTC
  • mfrom: (4265.1.4 bbc-merge)
  • Revision ID: pqm@pqm.ubuntu.com-20090409202307-n0depb16qepoe21o
(jam) Change _fetch_uses_deltas = False for CHK repos until we can
        write a better fix.

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bzrlib/smart/protocol.py
1
 
# Copyright (C) 2006-2010 Canonical Ltd
 
1
# Copyright (C) 2006, 2007 Canonical Ltd
2
2
#
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3
# This program is free software; you can redistribute it and/or modify
4
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# it under the terms of the GNU General Public License as published by
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from cStringIO import StringIO
23
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import struct
24
24
import sys
25
 
import thread
26
 
import threading
27
25
import time
28
26
 
29
27
import bzrlib
30
 
from bzrlib import (
31
 
    debug,
32
 
    errors,
33
 
    osutils,
34
 
    )
 
28
from bzrlib import debug
 
29
from bzrlib import errors
35
30
from bzrlib.smart import message, request
36
31
from bzrlib.trace import log_exception_quietly, mutter
37
 
from bzrlib.bencode import bdecode_as_tuple, bencode
 
32
from bzrlib.util.bencode import bdecode_as_tuple, bencode
38
33
 
39
34
 
40
35
# Protocol version strings.  These are sent as prefixes of bzr requests and
62
57
 
63
58
def _encode_tuple(args):
64
59
    """Encode the tuple args to a bytestream."""
65
 
    joined = '\x01'.join(args) + '\n'
66
 
    if type(joined) is unicode:
67
 
        # XXX: We should fix things so this never happens!  -AJB, 20100304
68
 
        mutter('response args contain unicode, should be only bytes: %r',
69
 
               joined)
70
 
        joined = joined.encode('ascii')
71
 
    return joined
 
60
    return '\x01'.join(args) + '\n'
72
61
 
73
62
 
74
63
class Requester(object):
125
114
class SmartServerRequestProtocolOne(SmartProtocolBase):
126
115
    """Server-side encoding and decoding logic for smart version 1."""
127
116
 
128
 
    def __init__(self, backing_transport, write_func, root_client_path='/',
129
 
            jail_root=None):
 
117
    def __init__(self, backing_transport, write_func, root_client_path='/'):
130
118
        self._backing_transport = backing_transport
131
119
        self._root_client_path = root_client_path
132
 
        self._jail_root = jail_root
133
120
        self.unused_data = ''
134
121
        self._finished = False
135
122
        self.in_buffer = ''
157
144
                req_args = _decode_tuple(first_line)
158
145
                self.request = request.SmartServerRequestHandler(
159
146
                    self._backing_transport, commands=request.request_handlers,
160
 
                    root_client_path=self._root_client_path,
161
 
                    jail_root=self._jail_root)
162
 
                self.request.args_received(req_args)
 
147
                    root_client_path=self._root_client_path)
 
148
                self.request.dispatch_command(req_args[0], req_args[1:])
163
149
                if self.request.finished_reading:
164
150
                    # trivial request
165
151
                    self.unused_data = self.in_buffer
626
612
            mutter('hpss call:   %s', repr(args)[1:-1])
627
613
            if getattr(self._request._medium, 'base', None) is not None:
628
614
                mutter('             (to %s)', self._request._medium.base)
629
 
            self._request_start_time = osutils.timer_func()
 
615
            self._request_start_time = time.time()
630
616
        self._write_args(args)
631
617
        self._request.finished_writing()
632
618
        self._last_verb = args[0]
641
627
            if getattr(self._request._medium, '_path', None) is not None:
642
628
                mutter('                  (to %s)', self._request._medium._path)
643
629
            mutter('              %d bytes', len(body))
644
 
            self._request_start_time = osutils.timer_func()
 
630
            self._request_start_time = time.time()
645
631
            if 'hpssdetail' in debug.debug_flags:
646
632
                mutter('hpss body content: %s', body)
647
633
        self._write_args(args)
660
646
            mutter('hpss call w/readv: %s', repr(args)[1:-1])
661
647
            if getattr(self._request._medium, '_path', None) is not None:
662
648
                mutter('                  (to %s)', self._request._medium._path)
663
 
            self._request_start_time = osutils.timer_func()
 
649
            self._request_start_time = time.time()
664
650
        self._write_args(args)
665
651
        readv_bytes = self._serialise_offsets(body)
666
652
        bytes = self._encode_bulk_data(readv_bytes)
692
678
        if 'hpss' in debug.debug_flags:
693
679
            if self._request_start_time is not None:
694
680
                mutter('   result:   %6.3fs  %s',
695
 
                       osutils.timer_func() - self._request_start_time,
 
681
                       time.time() - self._request_start_time,
696
682
                       repr(result)[1:-1])
697
683
                self._request_start_time = None
698
684
            else:
872
858
 
873
859
 
874
860
def build_server_protocol_three(backing_transport, write_func,
875
 
                                root_client_path, jail_root=None):
 
861
                                root_client_path):
876
862
    request_handler = request.SmartServerRequestHandler(
877
863
        backing_transport, commands=request.request_handlers,
878
 
        root_client_path=root_client_path, jail_root=jail_root)
 
864
        root_client_path=root_client_path)
879
865
    responder = ProtocolThreeResponder(write_func)
880
866
    message_handler = message.ConventionalRequestHandler(request_handler, responder)
881
867
    return ProtocolThreeDecoder(message_handler)
911
897
            # We do *not* set self.decoding_failed here.  The message handler
912
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            # has raised an error, but the decoder is still able to parse bytes
913
899
            # and determine when this message ends.
914
 
            if not isinstance(exception.exc_value, errors.UnknownSmartMethod):
915
 
                log_exception_quietly()
 
900
            log_exception_quietly()
916
901
            self.message_handler.protocol_error(exception.exc_value)
917
902
            # The state machine is ready to continue decoding, but the
918
903
            # exception has interrupted the loop that runs the state machine.
1051
1036
            raise errors.SmartMessageHandlerError(sys.exc_info())
1052
1037
 
1053
1038
    def _state_accept_reading_unused(self):
1054
 
        self.unused_data += self._get_in_buffer()
 
1039
        self.unused_data = self._get_in_buffer()
1055
1040
        self._set_in_buffer(None)
1056
1041
 
1057
1042
    def next_read_size(self):
1073
1058
class _ProtocolThreeEncoder(object):
1074
1059
 
1075
1060
    response_marker = request_marker = MESSAGE_VERSION_THREE
1076
 
    BUFFER_SIZE = 1024*1024 # 1 MiB buffer before flushing
1077
1061
 
1078
1062
    def __init__(self, write_func):
1079
1063
        self._buf = []
1080
 
        self._buf_len = 0
1081
1064
        self._real_write_func = write_func
1082
1065
 
1083
1066
    def _write_func(self, bytes):
1084
 
        # TODO: It is probably more appropriate to use sum(map(len, _buf))
1085
 
        #       for total number of bytes to write, rather than buffer based on
1086
 
        #       the number of write() calls
1087
 
        # TODO: Another possibility would be to turn this into an async model.
1088
 
        #       Where we let another thread know that we have some bytes if
1089
 
        #       they want it, but we don't actually block for it
1090
 
        #       Note that osutils.send_all always sends 64kB chunks anyway, so
1091
 
        #       we might just push out smaller bits at a time?
1092
1067
        self._buf.append(bytes)
1093
 
        self._buf_len += len(bytes)
1094
 
        if self._buf_len > self.BUFFER_SIZE:
 
1068
        if len(self._buf) > 100:
1095
1069
            self.flush()
1096
1070
 
1097
1071
    def flush(self):
1098
1072
        if self._buf:
1099
1073
            self._real_write_func(''.join(self._buf))
1100
1074
            del self._buf[:]
1101
 
            self._buf_len = 0
1102
1075
 
1103
1076
    def _serialise_offsets(self, offsets):
1104
1077
        """Serialise a readv offset list."""
1153
1126
        _ProtocolThreeEncoder.__init__(self, write_func)
1154
1127
        self.response_sent = False
1155
1128
        self._headers = {'Software version': bzrlib.__version__}
1156
 
        if 'hpss' in debug.debug_flags:
1157
 
            self._thread_id = thread.get_ident()
1158
 
            self._response_start_time = None
1159
 
 
1160
 
    def _trace(self, action, message, extra_bytes=None, include_time=False):
1161
 
        if self._response_start_time is None:
1162
 
            self._response_start_time = osutils.timer_func()
1163
 
        if include_time:
1164
 
            t = '%5.3fs ' % (time.clock() - self._response_start_time)
1165
 
        else:
1166
 
            t = ''
1167
 
        if extra_bytes is None:
1168
 
            extra = ''
1169
 
        else:
1170
 
            extra = ' ' + repr(extra_bytes[:40])
1171
 
            if len(extra) > 33:
1172
 
                extra = extra[:29] + extra[-1] + '...'
1173
 
        mutter('%12s: [%s] %s%s%s'
1174
 
               % (action, self._thread_id, t, message, extra))
1175
1129
 
1176
1130
    def send_error(self, exception):
1177
1131
        if self.response_sent:
1183
1137
                ('UnknownMethod', exception.verb))
1184
1138
            self.send_response(failure)
1185
1139
            return
1186
 
        if 'hpss' in debug.debug_flags:
1187
 
            self._trace('error', str(exception))
1188
1140
        self.response_sent = True
1189
1141
        self._write_protocol_version()
1190
1142
        self._write_headers(self._headers)
1204
1156
            self._write_success_status()
1205
1157
        else:
1206
1158
            self._write_error_status()
1207
 
        if 'hpss' in debug.debug_flags:
1208
 
            self._trace('response', repr(response.args))
1209
1159
        self._write_structure(response.args)
1210
1160
        if response.body is not None:
1211
1161
            self._write_prefixed_body(response.body)
1212
 
            if 'hpss' in debug.debug_flags:
1213
 
                self._trace('body', '%d bytes' % (len(response.body),),
1214
 
                            response.body, include_time=True)
1215
1162
        elif response.body_stream is not None:
1216
 
            count = num_bytes = 0
1217
 
            first_chunk = None
1218
1163
            for exc_info, chunk in _iter_with_errors(response.body_stream):
1219
 
                count += 1
1220
1164
                if exc_info is not None:
1221
1165
                    self._write_error_status()
1222
1166
                    error_struct = request._translate_error(exc_info[1])
1227
1171
                        self._write_error_status()
1228
1172
                        self._write_structure(chunk.args)
1229
1173
                        break
1230
 
                    num_bytes += len(chunk)
1231
 
                    if first_chunk is None:
1232
 
                        first_chunk = chunk
1233
1174
                    self._write_prefixed_body(chunk)
1234
 
                    if 'hpssdetail' in debug.debug_flags:
1235
 
                        # Not worth timing separately, as _write_func is
1236
 
                        # actually buffered
1237
 
                        self._trace('body chunk',
1238
 
                                    '%d bytes' % (len(chunk),),
1239
 
                                    chunk, suppress_time=True)
1240
 
            if 'hpss' in debug.debug_flags:
1241
 
                self._trace('body stream',
1242
 
                            '%d bytes %d chunks' % (num_bytes, count),
1243
 
                            first_chunk)
1244
1175
        self._write_end()
1245
 
        if 'hpss' in debug.debug_flags:
1246
 
            self._trace('response end', '', include_time=True)
1247
1176
 
1248
1177
 
1249
1178
def _iter_with_errors(iterable):
1279
1208
        except (KeyboardInterrupt, SystemExit):
1280
1209
            raise
1281
1210
        except Exception:
1282
 
            mutter('_iter_with_errors caught error')
1283
 
            log_exception_quietly()
1284
1211
            yield sys.exc_info(), None
1285
1212
            return
1286
1213
 
1301
1228
            base = getattr(self._medium_request._medium, 'base', None)
1302
1229
            if base is not None:
1303
1230
                mutter('             (to %s)', base)
1304
 
            self._request_start_time = osutils.timer_func()
 
1231
            self._request_start_time = time.time()
1305
1232
        self._write_protocol_version()
1306
1233
        self._write_headers(self._headers)
1307
1234
        self._write_structure(args)
1319
1246
            if path is not None:
1320
1247
                mutter('                  (to %s)', path)
1321
1248
            mutter('              %d bytes', len(body))
1322
 
            self._request_start_time = osutils.timer_func()
 
1249
            self._request_start_time = time.time()
1323
1250
        self._write_protocol_version()
1324
1251
        self._write_headers(self._headers)
1325
1252
        self._write_structure(args)
1338
1265
            path = getattr(self._medium_request._medium, '_path', None)
1339
1266
            if path is not None:
1340
1267
                mutter('                  (to %s)', path)
1341
 
            self._request_start_time = osutils.timer_func()
 
1268
            self._request_start_time = time.time()
1342
1269
        self._write_protocol_version()
1343
1270
        self._write_headers(self._headers)
1344
1271
        self._write_structure(args)
1355
1282
            path = getattr(self._medium_request._medium, '_path', None)
1356
1283
            if path is not None:
1357
1284
                mutter('                  (to %s)', path)
1358
 
            self._request_start_time = osutils.timer_func()
 
1285
            self._request_start_time = time.time()
1359
1286
        self._write_protocol_version()
1360
1287
        self._write_headers(self._headers)
1361
1288
        self._write_structure(args)