ISCE_INSAR/components/iscesys/DataRetriever/gzipfile.py

70 lines
2.5 KiB
Python
Executable File

#!/usr/bin/env python3
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# Copyright 2012 California Institute of Technology. ALL RIGHTS RESERVED.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# United States Government Sponsorship acknowledged. This software is subject to
# U.S. export control laws and regulations and has been classified as 'EAR99 NLR'
# (No [Export] License Required except when exporting to an embargoed country,
# end user, or in support of a prohibited end use). By downloading this software,
# the user agrees to comply with all applicable U.S. export laws and regulations.
# The user has the responsibility to obtain export licenses, or other export
# authority as may be required before exporting this software to any 'EAR99'
# embargoed foreign country or citizen of those countries.
#
# Author: Giangi Sacco
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#!/usr/bin/env python3
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#
# Author: Giangi Sacco
# Copyright 2012, 2015 by the California Institute of Technology.
# ALL RIGHTS RESERVED.
# United States Government Sponsorship acknowledged. Any commercial use must be
# negotiated with the Office of Technology Transfer at the
# California Institute of Technology.
#
import gzip
import os
def is_gzipfile(filename):
fp = gzip.GzipFile(filename)
#since it fails for non gz file just try and catch
try:
s = fp.read()
ret = True
except OSError:
ret = False
return ret
class GZipFile:
def __init__(self,filename):
self._filename = filename
def extractall(self,path):
try:
os.mkdir(path)
except Exception:
pass
fp = gzip.GzipFile(self._filename)
s = fp.read()
fp.close()
#remove last extension
fp = open(os.path.join(path,'.'.join(os.path.basename(self._filename).split('.')[:-1])),'wb')
fp.write(s)
fp.close()