Add 'requests' library to third_party.

third_party/requests/packages/charade/escprober.py

+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from . import constants
+from .escsm import (HZSMModel, ISO2022CNSMModel, ISO2022JPSMModel,
+                    ISO2022KRSMModel)
+from .charsetprober import CharSetProber
+from .codingstatemachine import CodingStateMachine
+from .compat import wrap_ord
+
+
+class EscCharSetProber(CharSetProber):
+    def __init__(self):
+        CharSetProber.__init__(self)
+        self._mCodingSM = [
+            CodingStateMachine(HZSMModel),
+            CodingStateMachine(ISO2022CNSMModel),
+            CodingStateMachine(ISO2022JPSMModel),
+            CodingStateMachine(ISO2022KRSMModel)
+        ]
+        self.reset()
+
+    def reset(self):
+        CharSetProber.reset(self)
+        for codingSM in self._mCodingSM:
+            if not codingSM:
+                continue
+            codingSM.active = True
+            codingSM.reset()
+        self._mActiveSM = len(self._mCodingSM)
+        self._mDetectedCharset = None
+
+    def get_charset_name(self):
+        return self._mDetectedCharset
+
+    def get_confidence(self):
+        if self._mDetectedCharset:
+            return 0.99
+        else:
+            return 0.00
+
+    def feed(self, aBuf):
+        for c in aBuf:
+            # PY3K: aBuf is a byte array, so c is an int, not a byte
+            for codingSM in self._mCodingSM:
+                if not codingSM:
+                    continue
+                if not codingSM.active:
+                    continue
+                codingState = codingSM.next_state(wrap_ord(c))
+                if codingState == constants.eError:
+                    codingSM.active = False
+                    self._mActiveSM -= 1
+                    if self._mActiveSM <= 0:
+                        self._mState = constants.eNotMe
+                        return self.get_state()
+                elif codingState == constants.eItsMe:
+                    self._mState = constants.eFoundIt
+                    self._mDetectedCharset = codingSM.get_coding_state_machine()  # nopep8
+                    return self.get_state()
+
+        return self.get_state()