summaryrefslogtreecommitdiffstats
path: root/testing/mochitest/pywebsocket/mod_pywebsocket/memorizingfile.py
diff options
context:
space:
mode:
Diffstat (limited to 'testing/mochitest/pywebsocket/mod_pywebsocket/memorizingfile.py')
-rw-r--r--testing/mochitest/pywebsocket/mod_pywebsocket/memorizingfile.py99
1 files changed, 99 insertions, 0 deletions
diff --git a/testing/mochitest/pywebsocket/mod_pywebsocket/memorizingfile.py b/testing/mochitest/pywebsocket/mod_pywebsocket/memorizingfile.py
new file mode 100644
index 000000000..4d4cd9585
--- /dev/null
+++ b/testing/mochitest/pywebsocket/mod_pywebsocket/memorizingfile.py
@@ -0,0 +1,99 @@
+#!/usr/bin/env python
+#
+# Copyright 2011, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+# * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+"""Memorizing file.
+
+A memorizing file wraps a file and memorizes lines read by readline.
+"""
+
+
+import sys
+
+
+class MemorizingFile(object):
+ """MemorizingFile wraps a file and memorizes lines read by readline.
+
+ Note that data read by other methods are not memorized. This behavior
+ is good enough for memorizing lines SimpleHTTPServer reads before
+ the control reaches WebSocketRequestHandler.
+ """
+
+ def __init__(self, file_, max_memorized_lines=sys.maxint):
+ """Construct an instance.
+
+ Args:
+ file_: the file object to wrap.
+ max_memorized_lines: the maximum number of lines to memorize.
+ Only the first max_memorized_lines are memorized.
+ Default: sys.maxint.
+ """
+
+ self._file = file_
+ self._memorized_lines = []
+ self._max_memorized_lines = max_memorized_lines
+ self._buffered = False
+ self._buffered_line = None
+
+ def __getattribute__(self, name):
+ if name in ('_file', '_memorized_lines', '_max_memorized_lines',
+ '_buffered', '_buffered_line', 'readline',
+ 'get_memorized_lines'):
+ return object.__getattribute__(self, name)
+ return self._file.__getattribute__(name)
+
+ def readline(self, size=-1):
+ """Override file.readline and memorize the line read.
+
+ Note that even if size is specified and smaller than actual size,
+ the whole line will be read out from underlying file object by
+ subsequent readline calls.
+ """
+
+ if self._buffered:
+ line = self._buffered_line
+ self._buffered = False
+ else:
+ line = self._file.readline()
+ if line and len(self._memorized_lines) < self._max_memorized_lines:
+ self._memorized_lines.append(line)
+ if size >= 0 and size < len(line):
+ self._buffered = True
+ self._buffered_line = line[size:]
+ return line[:size]
+ return line
+
+ def get_memorized_lines(self):
+ """Get lines memorized so far."""
+ return self._memorized_lines
+
+
+# vi:sts=4 sw=4 et