def append_file_contents(file_path, contents):
"""
Append 'contents' to 'file_path'.
"""
bytes_to_write = encode_for_writing_to_file(contents)
try:
with open(file_path, "ab+") as F:
F.write(bytes_to_write)
except EnvironmentError as e:
logger.error_with_prefix(
'AppendFileContents',
'Appending to file ' + file_path + ' Exception is ' + str(e))
return None
return 0
def set_file_contents(file_path, contents):
"""
Write 'contents' to 'file_path'.
"""
if type(contents) == str:
contents = contents.encode('latin-1', 'ignore')
try:
with open(file_path, "wb+") as F:
F.write(contents)
except OSError as e:
logger.error_with_prefix(
'SetFileContents', 'Writing to file ' + file_path + ' Exception is ' + str(e))
return None
return 0
def replace_file_with_contents_atomic(filepath, contents):
"""
Write 'contents' to 'filepath' by creating a temp file, and replacing original.
"""
handle, temp = tempfile.mkstemp(dir=os.path.dirname(filepath))
if type(contents) == str:
contents = contents.encode('latin-1')
try:
os.write(handle, contents)
except OSError as e:
logger.error_with_prefix(
'ReplaceFileContentsAtomic', 'Writing to file ' + filepath + ' Exception is ' + str(e))
return None
finally:
os.close(handle)
try:
os.rename(temp, filepath)
return None
except OSError as e:
logger.error_with_prefix(
'ReplaceFileContentsAtomic', 'Renaming ' + temp + ' to ' + filepath + ' Exception is ' + str(e)
)
try:
os.remove(filepath)
except OSError as e:
logger.error_with_prefix(
'ReplaceFileContentsAtomic', 'Removing ' + filepath + ' Exception is ' + str(e))
try:
os.rename(temp, filepath)
except OSError as e:
logger.error_with_prefix(
'ReplaceFileContentsAtomic', 'Removing ' + filepath + ' Exception is ' + str(e))
return 1
return 0
def get_file_contents(file_path, as_bin=False):
"""
Read and return contents of 'file_path'.
"""
mode = 'r'
if as_bin:
mode += 'b'
try:
with open(file_path, mode) as F:
contents = F.read()
return contents
except OSError as e:
logger.error_with_prefix(
'GetFileContents', 'Reading from file ' + file_path + ' Exception is ' + str(e))
return None
def append_file_contents(file_path, contents):
"""
Append 'contents' to 'file_path'.
"""
if type(contents) == str:
if sys.version_info[0] == 3:
contents = contents.encode('latin-1').decode('latin-1')
elif sys.version_info[0] == 2:
contents = contents.encode('latin-1')
try:
with open(file_path, "a+") as F:
F.write(contents)
except OSError as e:
logger.error_with_prefix(
'AppendFileContents', 'Appending to file ' + file_path + ' Exception is ' + str(e))
return None
return 0
def replace_file_with_contents_atomic(filepath, contents):
"""
Write 'contents' to 'filepath' by creating a temp file, and replacing original.
"""
handle, temp = tempfile.mkstemp(dir=os.path.dirname(filepath))
bytes_to_write = encode_for_writing_to_file(contents)
try:
os.write(handle, bytes_to_write)
except EnvironmentError as e:
logger.error_with_prefix(
'ReplaceFileContentsAtomic',
'Writing to file ' + filepath + ' Exception is ' + str(e))
return None
finally:
os.close(handle)
try:
os.rename(temp, filepath)
return None
except EnvironmentError as e:
logger.error_with_prefix(
'ReplaceFileContentsAtomic',
'Renaming ' + temp + ' to ' + filepath + ' Exception is ' + str(e))
try:
os.remove(filepath)
except EnvironmentError as e:
logger.error_with_prefix(
'ReplaceFileContentsAtomic',
'Removing ' + filepath + ' Exception is ' + str(e))
try:
os.rename(temp, filepath)
except EnvironmentError as e:
logger.error_with_prefix(
'ReplaceFileContentsAtomic',
'Removing ' + filepath + ' Exception is ' + str(e))
return 1
return 0