responding to PR comments

crawler/src/main/resources/bin/RetrieveAVRISNGData.py

@@ -0,0 +1,73 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+
+from ftplib import FTP
+import os, sys, os.path
+
+def handleDownload(block):
+    file.write(block)
+    print ".",
+
+ddir='/Users/alexahuerta/Documents' # set to local path where you want files downloaded to
+os.chdir(ddir)
+ftp = FTP('avng.jpl.nasa.gov')
+
+print 'Logging in.'
+ftp.login()
+directory = '/'
+
+flight_line = raw_input("Enter name of flight line you wish to download: ")
+data2014 = '/AVNG_2014_data_distribution/L2/'
+data2015 = '/AVNG_2015_data_distribution/L2/'
+
+ftp.cwd(data2015)
+dirnames2015 = ftp.nlst()
+for dirname in dirnames2015:
+    if dirname == flight_line:
+        print 'Changing to ' + dirname
+        ftp.cwd(dirname)
+        filenames = ftp.nlst() # get list of filenames in directory
+        print filenames
+        localpath = ddir + '/' + dirname
+        print localpath
+        os.mkdir(localpath) # create this directory locally
+        #download each file to the newly created local directory
+        for filename in filenames:
+            local_filename = os.path.join(localpath, filename)
+            file = open(local_filename, 'wb')
+            ftp.retrbinary('RETR '+ filename, file.write)
+            file.close()
+        ftp.cwd('../..')
+
+ftp.cwd(data2014)
+dirnames2014 = ftp.nlst()
+for dirname in dirnames2014:
+    if dirname == flight_line:
+        print 'Changing to ' + dirname
+        ftp.cwd(dirname)
+        filenames = ftp.nlst() # get list of filenames in directory
+        print filenames
+        localpath = ddir + '/' + dirname
+        print localpath
+        os.mkdir(localpath) # create this directory locally
+        #download each file to the newly created local directory
+        for filename in filenames:
+            local_filename = os.path.join(localpath, filename)
+            file = open(local_filename, 'wb')
+            ftp.retrbinary('RETR '+ filename, file.write)
+            file.close()
+        ftp.cwd('../..')
+
+ftp.quit()