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Code Issues Projects Releases Packages Wiki Activity Actions 11

Issue #19623: Fixed writing to unseekable files in the aifc module.

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Serhiy Storchaka 2013-12-14 20:35:04 +02:00
parent 5da107ac72
commit 84d28b4ee5
6 changed files with 103 additions and 62 deletions
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11
Lib/aifc.py
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@ -771,7 +771,10 @@ class Aifc_write:
self._datalength = (self._datalength + 3) // 4
if self._datalength & 1:
self._datalength = self._datalength + 1
self._form_length_pos = self._file.tell()
try:
self._form_length_pos = self._file.tell()
except (AttributeError, OSError):
self._form_length_pos = None
commlength = self._write_form_length(self._datalength)
if self._aifc:
self._file.write(b'AIFC')
@ -783,7 +786,8 @@ class Aifc_write:
self._file.write(b'COMM')
_write_ulong(self._file, commlength)
_write_short(self._file, self._nchannels)
self._nframes_pos = self._file.tell()
if self._form_length_pos is not None:
self._nframes_pos = self._file.tell()
_write_ulong(self._file, self._nframes)
if self._comptype in (b'ULAW', b'ulaw', b'ALAW', b'alaw', b'G722'):
_write_short(self._file, 8)
@ -794,7 +798,8 @@ class Aifc_write:
self._file.write(self._comptype)
_write_string(self._file, self._compname)
self._file.write(b'SSND')
self._ssnd_length_pos = self._file.tell()
if self._form_length_pos is not None:
self._ssnd_length_pos = self._file.tell()
_write_ulong(self._file, self._datalength + 8)
_write_ulong(self._file, 0)
_write_ulong(self._file, 0)