Mercurial > public > mercurial-scm > hg-stable

annotate hgext/inotify/common.py @ 8553:e387ecd7a6ed

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
inotify: change protocol so that different query types can be supported.
author Nicolas Dumazet <nicdumz.commits@gmail.com>
date Fri, 17 Apr 2009 20:10:47 +0900
parents 4aad982111b6
children 3e09bc5fee12
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
6239
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
1 # server.py - inotify common protocol code
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
2 #
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
3 # Copyright 2006, 2007, 2008 Bryan O'Sullivan <bos@serpentine.com>
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
4 # Copyright 2007, 2008 Brendan Cully <brendan@kublai.com>
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
5 #
8225
46293a0c7e9f updated license to be explicit about GPL version 2
Martin Geisler <mg@lazybytes.net>
parents: 6239
diff changeset
6 # This software may be used and distributed according to the terms of the
46293a0c7e9f updated license to be explicit about GPL version 2
Martin Geisler <mg@lazybytes.net>
parents: 6239
diff changeset
7 # GNU General Public License version 2, incorporated herein by reference.
6239
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
8
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
9 import cStringIO, socket, struct
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
10
8553
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
11 """
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
12 Protocol between inotify clients and server:
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
13
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
14 Client sending query:
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
15 1) send protocol version number
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
16 2) send query type (string, 4 letters long)
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
17 3) send query parameters:
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
18 - For STAT, N+1 \0-separated strings:
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
19 1) N different names that need checking
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
20 2) 1 string containing all the status types to match
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
21
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
22 Server sending query answer:
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
23 1) send protocol version number
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
24 2) send query type
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
25 3) send struct.pack'ed headers describing the length of the content:
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
26 e.g. for STAT, receive 8 integers describing the length of the
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
27 8 \0-separated string lists ( one list for each lmar!?ic status type )
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
28
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
29 """
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
30
e387ecd7a6ed inotify: change protocol so that different query types can be supported.
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8386
diff changeset
31 version = 2
6239
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
32
8386
4aad982111b6 inotify: Abstract the layer format and sizes to a inotify.common dictionary
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8225
diff changeset
33 resphdrfmts = {
4aad982111b6 inotify: Abstract the layer format and sizes to a inotify.common dictionary
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8225
diff changeset
34 'STAT': '>llllllll' # status requests
4aad982111b6 inotify: Abstract the layer format and sizes to a inotify.common dictionary
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8225
diff changeset
35 }
4aad982111b6 inotify: Abstract the layer format and sizes to a inotify.common dictionary
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8225
diff changeset
36 resphdrsizes = dict((k, struct.calcsize(v))
4aad982111b6 inotify: Abstract the layer format and sizes to a inotify.common dictionary
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 8225
diff changeset
37 for k, v in resphdrfmts.iteritems())
6239
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
38
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
39 def recvcs(sock):
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
40 cs = cStringIO.StringIO()
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
41 s = True
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
42 try:
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
43 while s:
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
44 s = sock.recv(65536)
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
45 cs.write(s)
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
46 finally:
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
47 sock.shutdown(socket.SHUT_RD)
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
48 cs.seek(0)
39cfcef4f463 Add inotify extension
Bryan O'Sullivan <bos@serpentine.com>
parents:
diff changeset
49 return cs