328 lines
12 KiB
Python
Executable File
328 lines
12 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
|
|
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
|
|
|
|
|
|
|
|
|
|
import isce
|
|
import zipfile
|
|
import os
|
|
import sys
|
|
from isce import logging
|
|
from iscesys.Component.Component import Component
|
|
import shutil
|
|
from urllib import request
|
|
from urllib.parse import urlparse
|
|
import time
|
|
#Parameters definitions
|
|
URL = Component.Parameter('_url',
|
|
public_name = 'URL',default = '',
|
|
type = str,
|
|
mandatory = False,
|
|
doc = "URL where to get the data from")
|
|
USERNAME = Component.Parameter('_un',
|
|
public_name='username',
|
|
default = None,
|
|
type = str,
|
|
mandatory = False,
|
|
doc = "Username in case the url is password protected")
|
|
PASSWORD = Component.Parameter('_pw',
|
|
public_name='password',
|
|
default = None,
|
|
type = str,
|
|
mandatory = False,
|
|
doc = "Password in case the url is password protected")
|
|
DIRECTORY = Component.Parameter('_downloadDir',
|
|
public_name='directory',
|
|
default = './',
|
|
type = str,
|
|
mandatory = False,
|
|
doc = "Location where the file are downloaded")
|
|
WAIT = Component.Parameter('_wait',
|
|
public_name='wait',
|
|
default = 5,
|
|
type = float,
|
|
mandatory = False,
|
|
doc = "Wait time between trials when server is down")
|
|
NUM_TRIALS = Component.Parameter('_numTrials',
|
|
public_name='number of trials',
|
|
default = 3,
|
|
type = int,
|
|
mandatory = False,
|
|
doc = "Number of times it tries to download the file when server is down")
|
|
PROCEED_IF_NO_SERVER = Component.Parameter(
|
|
'_proceedIfNoServer',
|
|
public_name='proceed if no server',
|
|
default=False,
|
|
type=bool,
|
|
mandatory=False,
|
|
doc='Flag to continue even if server is down.'
|
|
)
|
|
## This class provides a set of convenience method to retrieve and possibly combine different DEMs from the USGS server.
|
|
# \c NOTE: the latitudes and the longitudes that describe the DEMs refer to the bottom left corner of the image.
|
|
class DataRetriever(Component):
|
|
|
|
def serverUp(self,url,needCredentials=False):
|
|
urlp = urlparse(url)
|
|
server = urlp.scheme + "://" + urlp.netloc
|
|
ret = False
|
|
if needCredentials:
|
|
try:
|
|
request.urlopen(server)
|
|
ret = True
|
|
except Exception as e:
|
|
try:
|
|
#when server needs credentials trying the url open fails
|
|
#with one of the below messages
|
|
if e.reason.reason.count('CERTIFICATE_VERIFY_FAILED'):
|
|
ret = True
|
|
except:
|
|
try:
|
|
if ''.join(e.reason.split()).lower() == 'authorizationrequired':
|
|
ret = True
|
|
except:
|
|
#then assume that the exception was due to the server down
|
|
ret = False
|
|
else:
|
|
try:
|
|
request.urlopen(server)
|
|
ret = True
|
|
except Exception:
|
|
#in this case assume directly server down
|
|
ret = False
|
|
|
|
return ret
|
|
|
|
##
|
|
# Fetches the files in listFiles from URL
|
|
# @param listFile \c list of the filenames to be retrieved.
|
|
|
|
def getFiles(self,listFile):
|
|
try:
|
|
os.makedirs(self._downloadDir)
|
|
except:
|
|
#dir already exists
|
|
pass
|
|
#curl with -O downloads in working dir, so save cwd
|
|
cwd = os.getcwd()
|
|
#move to _downloadDir
|
|
os.chdir(self._downloadDir)
|
|
for fileNow in listFile:
|
|
reason = 'file'
|
|
for i in range(self._numTrials):
|
|
try:
|
|
if not os.path.exists(fileNow):
|
|
if(self._un is None or self._pw is None):
|
|
if not self.serverUp(self._url):
|
|
reason = 'server'
|
|
raise Exception
|
|
if os.path.exists(os.path.join(os.environ['HOME'],'.netrc')):
|
|
command = 'curl -n -L -c $HOME/.earthdatacookie -b $HOME/.earthdatacookie -k -f -O ' + os.path.join(self._url,fileNow)
|
|
print("command = {}".format(command))
|
|
else:
|
|
self.logger.error('Please create a .netrc file in your home directory containing\nmachine urs.earthdata.nasa.gov\n\tlogin yourusername\n\tpassword yourpassword')
|
|
sys.exit(1)
|
|
|
|
else:
|
|
if not self.serverUp(self._url,True):
|
|
reason = 'server'
|
|
raise Exception
|
|
command = 'curl -k -f -u ' + self._un + ':' + self._pw + ' -O ' + os.path.join(self._url,fileNow)
|
|
if os.system(command):
|
|
raise Exception
|
|
self._downloadReport[fileNow] = self._succeded
|
|
break
|
|
except Exception as e:
|
|
if reason == 'file':
|
|
self.logger.warning('There was a problem in retrieving the file %s. Requested file seems not present on server.'%(os.path.join(self._url,fileNow)))
|
|
#if the problem is file missing break the loop that tries when the server is down
|
|
self._downloadReport[fileNow] = self._failed
|
|
break
|
|
elif reason == 'server':
|
|
if i == self._numTrials - 1 and not self._proceedIfNoServer:
|
|
self.logger.error('There was a problem in retrieving the file %s. Check the name of the server or try again later in case the server is momentarily down.'%(os.path.join(self._url,fileNow)))
|
|
sys.exit(1)
|
|
if i == self._numTrials - 1 and self._proceedIfNoServer:
|
|
self._downloadReport[fileNow] = self._failed
|
|
else:
|
|
time.sleep(self._wait)
|
|
#move back to original directory
|
|
self.decompressFiles(listFile,self._downloadReport,os.getcwd())
|
|
self.clean(listFile,self._downloadReport)
|
|
os.chdir(cwd)
|
|
|
|
|
|
def decompressFiles(self,listFile,report,cwd='./'):
|
|
import tempfile as tf
|
|
for file in listFile:
|
|
if report[file] == self._succeded:
|
|
td = tf.TemporaryDirectory()
|
|
self.decompress(file,td.name)
|
|
self._namesMapping[file] = os.listdir(td.name)
|
|
for name in self._namesMapping[file]:
|
|
try:
|
|
shutil.move(os.path.join(td.name,name),cwd)
|
|
except Exception:
|
|
#probably file already exists. Remove it and try again
|
|
try:
|
|
os.remove(os.path.join(cwd,name))
|
|
shutil.move(os.path.join(td.name,name),cwd)
|
|
except Exception:
|
|
print('Cannot decompress file',name)
|
|
raise Exception
|
|
|
|
|
|
|
|
def clean(self,listFile,report):
|
|
for file in listFile:
|
|
if report[file] == self._succeded:
|
|
os.remove(file)
|
|
##
|
|
#After retrieving the files this function prints the status of the download for each file,
|
|
#which could be 'succeeded' or 'failed'
|
|
|
|
def printDownloadReport(self):
|
|
for k,v in self._downloadReport.items():
|
|
print('Download of file',k,v,'.')
|
|
##
|
|
# This function returns a dictionary whose keys are the attempted downloaded files and
|
|
# the values are the status of the download, 'succeed' or 'failed'.
|
|
# @return \c dictionary whose keys are the attempted downloaded files and the values are
|
|
# the status of teh download, 'succeed' or 'failed'.
|
|
|
|
def getDownloadReport(self):
|
|
return self._downloadReport
|
|
|
|
|
|
|
|
##
|
|
# Function that decompresses the file.
|
|
# @param filename \c string the name of the file to decompress.
|
|
def decompress(self,filename,ddir):
|
|
ex = self.getExtractor(filename)
|
|
ex.extractall(ddir)
|
|
|
|
##
|
|
#Inspecting the file determine the right extractor. If it cannot be determined then assume
|
|
#no compression was used
|
|
|
|
def getExtractor(self,filename):
|
|
import tarfile
|
|
import zipfile
|
|
from . import gzipfile
|
|
|
|
ret = None
|
|
if(tarfile.is_tarfile(filename)):
|
|
ret = tarfile.TarFile(filename)
|
|
elif(zipfile.is_zipfile(filename)):
|
|
ret = zipfile.ZipFile(filename)
|
|
elif(gzipfile.is_gzipfile(filename)):
|
|
ret = gzipfile.GZipFile(filename)
|
|
else:
|
|
print('Unrecognized archive type')
|
|
raise Exception
|
|
return ret
|
|
|
|
@property
|
|
def proceedIfNoServer(self):
|
|
return self._proceedIfNoServer
|
|
@proceedIfNoServer.setter
|
|
def proceedIfNoServer(self,proceedIfNoServer):
|
|
self._proceedIfNoServer = proceedIfNoServer
|
|
@property
|
|
def url(self):
|
|
return self._url
|
|
@url.setter
|
|
def url(self,url):
|
|
self._url = url
|
|
@property
|
|
def un(self):
|
|
return self._un
|
|
@un.setter
|
|
def un(self,un):
|
|
self._un = un
|
|
@property
|
|
def pw(self):
|
|
return self._pw
|
|
@pw.setter
|
|
def pw(self,pw):
|
|
self._pw = pw
|
|
##
|
|
# Setter function for the download directory.
|
|
# @param ddir \c string directory where the data are downloaded.
|
|
@property
|
|
def downloadDir(self):
|
|
return self._downloadDir
|
|
@downloadDir.setter
|
|
def downloadDir(self,ddir):
|
|
self._downloadDir = ddir
|
|
|
|
def __getstate__(self):
|
|
d = dict(self.__dict__)
|
|
del d['logger']
|
|
return d
|
|
|
|
def __setstate__(self,d):
|
|
self.__dict__.update(d)
|
|
self.logger = logging.getLogger('isce.iscesys.DataRetriever')
|
|
return
|
|
|
|
|
|
|
|
|
|
|
|
family = 'dataretriever'
|
|
parameter_list = (
|
|
URL,
|
|
USERNAME,
|
|
PASSWORD,
|
|
DIRECTORY,
|
|
WAIT,
|
|
NUM_TRIALS,
|
|
PROCEED_IF_NO_SERVER
|
|
)
|
|
def __init__(self,family = '', name = ''):
|
|
|
|
#map of the names before and after decompression
|
|
self._namesMapping = {}
|
|
self._downloadReport = {}
|
|
# Note if _useLocalDirectory is True then the donwloadDir is the local directory
|
|
##self._downloadDir = os.getcwd()#default to the cwd
|
|
|
|
self._failed = 'failed'
|
|
self._succeded = 'succeeded'
|
|
super(DataRetriever, self).__init__(family if family else self.__class__.family, name=name)
|
|
# logger not defined until baseclass is called
|
|
|
|
if not self.logger:
|
|
self.logger = logging.getLogger('isce.iscesys.DataRetriever')
|