Source Code for Module buildbot.util.netstrings

 1  # This file is part of Buildbot.  Buildbot is free software: you can 
 2  # redistribute it and/or modify it under the terms of the GNU General Public 
 3  # License as published by the Free Software Foundation, version 2. 
 4  # 
 5  # This program is distributed in the hope that it will be useful, but WITHOUT 
 6  # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 
 7  # FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more 
 8  # details. 
 9  # 
10  # You should have received a copy of the GNU General Public License along with 
11  # this program; if not, write to the Free Software Foundation, Inc., 51 
12  # Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 
13  # 
14  # Copyright Buildbot Team Members 
15   
16  from twisted.protocols import basic 
17  from zope.interface import implements 
18  from twisted.internet.interfaces import IAddress, ITransport 
19   
20 -class NullAddress(object): 
21      "an address for NullTransport" 
22      implements(IAddress) 
23   
24 -class NullTransport(object): 
25      "a do-nothing transport to make NetstringReceiver happy" 
26      implements(ITransport) 
27 -    def write(self, data): raise NotImplementedError 
28 -    def writeSequence(self, data): raise NotImplementedError 
29 -    def loseConnection(self): pass 
30 -    def getPeer(self): 
31          return NullAddress 
32 -    def getHost(self): 
33          return NullAddress 
34   
35 -class NetstringParser(basic.NetstringReceiver): 
36      """ 
37      Adapts the Twisted netstring support (which assumes it is on a socket) to 
38      work on simple strings, too.  Call the C{feed} method with arbitrary blocks 
39      of data, and override the C{stringReceived} method to get called for each 
40      embedded netstring.  The default implementation collects the netstrings in 
41      the list C{self.strings}. 
42      """ 
43   
44 -    def __init__(self): 
45          # most of the complexity here is stubbing out the transport code so 
46          # that Twisted-10.2.0 and higher believes that this is a valid protocol 
47          self.makeConnection(NullTransport()) 
48          self.strings = [] 
49   
50 -    def feed(self, data): 
51          """ 
52          """ 
53          self.dataReceived(data) 
54          # dataReceived handles errors unusually quietly! 
55          if self.brokenPeer: 
56              raise basic.NetstringParseError 
57   
58 -    def stringReceived(self, string): 
59          self.strings.append(string) 
60