def _is_compress_filetype(self, inpath):
"""private method that performs magic number and size check on file to determine whether to compress the file"""
# check for common file type suffixes in order to avoid the need for file reads to check magic number for binary vs. text file
if self._is_common_binary(inpath):
return False
elif self._is_common_text(inpath):
return True
else:
# files > 10kB get checked for compression (arbitrary decision to skip compression on small files)
the_file_size = file_size(inpath)
if the_file_size > 10240:
if the_file_size > 512000: # seems to be a break point at ~ 500kb where file compression offset by additional file read, so limit tests to files > 500kB
try:
system_command = "file --mime-type -b " + quote(inpath)
response = muterun(system_command)
if response.stdout[0:5] == "text/": # check for a text file mime type
return True # appropriate size, appropriate file mime type
else:
return False # appropriate size, inappropriate file mime type
except Exception:
return False
else:
return True # if file size is < 500kB, skip the additional file read and just go with compression
else:
return False # below minimum size to consider compression, do not compress
def _is_compress_filetype(self, inpath):
"""private method that performs magic number and size check on file to determine whether to compress the file"""
# check for common file type suffixes in order to avoid the need for file reads to check magic number for binary vs. text file
if self._is_common_binary(inpath):
return False
elif self._is_common_text(inpath):
return True
else:
# files > 10kB get checked for compression (arbitrary decision to skip compression on small files)
the_file_size = file_size(inpath)
if the_file_size > 10240:
if the_file_size > 512000: # seems to be a break point at ~ 500kb where file compression offset by additional file read, so limit tests to files > 500kB
try:
system_command = "file --mime-type -b " + quote(inpath)
response = muterun(system_command)
if response.stdout[0:5] == "text/": # check for a text file mime type
return True # appropriate size, appropriate file mime type
else:
return False # appropriate size, inappropriate file mime type
except Exception:
return False
else:
return True # if file size is < 500kB, skip the additional file read and just go with compression
else:
return False # below minimum size to consider compression, do not compress
def test_sys_meta_file_size(self): """Test file size metadata read""" self.assertEqual(61, system.file_size(self.metafilepath))
def test_sys_meta_file_size(self):
"""Test file size metadata read"""
self.assertEqual(61, system.file_size(self.metafilepath))