~bzr-pqm/bzr/bzr.dev

3408.6.1 by Eric Holmberg
Fix for Bug #215426 in which bzr can cause a MemoryError in socket.recv while
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# Copyright (C) 2008 Canonical Ltd
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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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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from cStringIO import StringIO
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class FakeReadFile(object):
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    """A file-like object that can be given predefined content and read
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    like a file.  The maximum size and number of the reads is recorded."""
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    def __init__(self, data):
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        """Initialize the mock file object with the provided data."""
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        self.data = StringIO(data)
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        self.max_read_size = None
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        self.read_count = 0
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    def read(self, size=-1):
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        """Reads size characters from the input (or the rest of the string if
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        size is -1)."""
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        data = self.data.read(size)
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        self.max_read_size = max(self.max_read_size, len(data))
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        self.read_count += 1
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        return data
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    def get_max_read_size(self):
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        """Returns the maximum read size or None if no reads have occured."""
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        return self.max_read_size
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    def get_read_count(self):
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        """Returns the number of calls to read."""
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        return self.read_count
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    def reset_read_count(self):
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        """Clears the read count."""
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        self.read_count = 0