File size: 4,783 Bytes
ae4627d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | #GENERAL HELPER CLASSES: FileManager, Switch
import cherrypy, os, threading, subprocess
#=======MANAGE FILES==========================================================#
class FileManager:
# initialise the object
def __init__(self):
self.lock = threading.Lock()
# Generate the filepath to the datadir when given an fid or uuid
def grab_datapath(self, theid, whichpath='fidpath'):
# Check if theid is a uuid
if len(theid) > 20:
fid = 'we need to discover the fid'
else:
fid = theid
# Now lets build the path
datadir = os.path.join(os.path.dirname(__file__), cherrypy.config['datadir'])
fidpath = os.path.join(datadir, fid)
# And finally return the full path
if whichpath is 'fidpath':
return fidpath
elif whichpath is 'original':
return os.path.join(fidpath, 'original')
# Grab the full path to a file uploaded the the 'original' dir in 'data/fid/original'
def grab_originalfilepath(self, theid, filename):
originalpath = self.grab_datapath(theid, 'original')
fullfilepath = os.path.join(originalpath, filename)
if not os.path.exists(fullfilepath):
return False
else:
return fullfilepath
# Grab the full filwpath when given two segments
def grab_joinedpath(self, left, right):
return os.path.join(left, right)
# Save a string to a file
def saveStringToFile(self, string, filepath):
with open(filepath, "w") as text_file:
print(string, file=text_file)
# Save a downloaded file in chunks
def saveAsChunks(self, myFile, basePath):
filepath = os.path.join(basePath, myFile.filename)
out = "length: %s Name: %s Mimetype: %s"
size = 0
while True:
data = myFile.file.read(8192)
if not data:
break
with open(filepath, "ba") as mynewfile:
mynewfile.write(data)
mynewfile.close()
size += len(data)
return out % (size, myFile.filename, myFile.content_type)
# Check if the file has one of a collection of filetypes
def fileisoneof(self, filename, allowedfiletypes):
msg = ''
allowed = allowedfiletypes.split()
dotpos = filename.rfind('.')
suffix = filename[ dotpos+1 : filename.__len__() ]
if dotpos > -1 and suffix in allowed:
return True
else :
return False
# Create a directory at the specified path
def createDirAt(self, fullpath) :
# Check the new name doesn't already exist
if not os.path.exists(fullpath):
os.makedirs(fullpath)
return fullpath
else :
return "Error: No Directory Created"
# Create a new unique directory in the style of "0000001"
def createUniqueDirAt(self, parentdir):
# Make sure this can only be run once at a time
self.lock.acquire()
# Grab the most recently modified directory
try:
recent = max([os.path.join(parentdir,d) for d in os.listdir(parentdir)], key=os.path.getmtime)
except:
recent = "0"
recent = recent.replace(parentdir+'/', '')
# Convert directory name to an int
recentint = int(recent)
# Generate a new directory name and filepath incremended by one
newdir=str(recentint+1)
newdir=newdir.zfill(9)
newfullpath = parentdir+'/'+newdir
# Check the new name doesn't already exist
success = self.createDirAt(newfullpath)
# We done what we've needed so lets release the lock
self.lock.release()
return newdir
# Grab the first line of a file
def grabheader(self, fullfilepath):
if os.path.exists(fullfilepath):
thebytes = subprocess.check_output("head -n1 "+fullfilepath, shell=True)
# Output is returned as bytes so we need to convert it to a string
return thebytes.decode("utf-8").strip()
else:
return 'no file found at: '+fullfilepath
# Nice switch statement object
class Switch(object):
def __init__(self, value):
self.value = value
self.fall = False
def __iter__(self):
"""Return the match method once, then stop"""
yield self.match
raise StopIteration
def match(self, *args):
"""Indicate whether or not to enter a case suite"""
if self.fall or not args:
return True
elif self.value in args: # changed for v1.5, see below
self.fall = True
return True
else:
return False
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