Sync contrib/tools/python3 layout with upstream

* Move src/ subdir contents to the top of the layout
* Rename self-written lib -> lib2 to avoid CaseFolding warning from the VCS
* Regenerate contrib/libs/python proxy-headers accordingly
4ccc62ac1511abcf0fed14ccade38e984e088f1e

1 files changed, 100 insertions, 0 deletions

diff --git a/contrib/tools/python3/Lib/email/mime/audio.py b/contrib/tools/python3/Lib/email/mime/audio.py
new file mode 100644
index 0000000000..065819b2a2
--- /dev/null
+++ b/contrib/tools/python3/Lib/email/mime/audio.py
@@ -0,0 +1,100 @@
+# Copyright (C) 2001-2007 Python Software Foundation
+# Author: Anthony Baxter
+# Contact: email-sig@python.org
+
+"""Class representing audio/* type MIME documents."""
+
+__all__ = ['MIMEAudio']
+
+from io import BytesIO
+from email import encoders
+from email.mime.nonmultipart import MIMENonMultipart
+
+
+class MIMEAudio(MIMENonMultipart):
+    """Class for generating audio/* MIME documents."""
+
+    def __init__(self, _audiodata, _subtype=None,
+                 _encoder=encoders.encode_base64, *, policy=None, **_params):
+        """Create an audio/* type MIME document.
+
+        _audiodata contains the bytes for the raw audio data.  If this data
+        can be decoded as au, wav, aiff, or aifc, then the
+        subtype will be automatically included in the Content-Type header.
+        Otherwise, you can specify  the specific audio subtype via the
+        _subtype parameter.  If _subtype is not given, and no subtype can be
+        guessed, a TypeError is raised.
+
+        _encoder is a function which will perform the actual encoding for
+        transport of the image data.  It takes one argument, which is this
+        Image instance.  It should use get_payload() and set_payload() to
+        change the payload to the encoded form.  It should also add any
+        Content-Transfer-Encoding or other headers to the message as
+        necessary.  The default encoding is Base64.
+
+        Any additional keyword arguments are passed to the base class
+        constructor, which turns them into parameters on the Content-Type
+        header.
+        """
+        if _subtype is None:
+            _subtype = _what(_audiodata)
+        if _subtype is None:
+            raise TypeError('Could not find audio MIME subtype')
+        MIMENonMultipart.__init__(self, 'audio', _subtype, policy=policy,
+                                  **_params)
+        self.set_payload(_audiodata)
+        _encoder(self)
+
+
+_rules = []
+
+
+# Originally from the sndhdr module.
+#
+# There are others in sndhdr that don't have MIME types. :(
+# Additional ones to be added to sndhdr? midi, mp3, realaudio, wma??
+def _what(data):
+    # Try to identify a sound file type.
+    #
+    # sndhdr.what() had a pretty cruddy interface, unfortunately.  This is why
+    # we re-do it here.  It would be easier to reverse engineer the Unix 'file'
+    # command and use the standard 'magic' file, as shipped with a modern Unix.
+    hdr = data[:512]
+    fakefile = BytesIO(hdr)
+    for testfn in _rules:
+        if res := testfn(hdr, fakefile):
+            return res
+    else:
+        return None
+
+
+def rule(rulefunc):
+    _rules.append(rulefunc)
+    return rulefunc
+
+
+@rule
+def _aiff(h, f):
+    if not h.startswith(b'FORM'):
+        return None
+    if h[8:12] in {b'AIFC', b'AIFF'}:
+        return 'x-aiff'
+    else:
+        return None
+
+
+@rule
+def _au(h, f):
+    if h.startswith(b'.snd'):
+        return 'basic'
+    else:
+        return None
+
+
+@rule
+def _wav(h, f):
+    # 'RIFF' <len> 'WAVE' 'fmt ' <len>
+    if not h.startswith(b'RIFF') or h[8:12] != b'WAVE' or h[12:16] != b'fmt ':
+        return None
+    else:
+        return "x-wav"