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https://github.com/Tygs/0bin.git
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281 lines
8.2 KiB
Python
281 lines
8.2 KiB
Python
# -*- coding: utf-8 -*-
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import os
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import hashlib
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import locale
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from datetime import datetime, timedelta
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from utils import settings
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class Paste(object):
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"""
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A paste objet to deal with the file opening/parsing/saving and the
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calculation of the expiration date.
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"""
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DIR_CACHE = set()
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DURATIONS = {
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u'10_mins': 10 * 60,
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u'30_mins': 30 * 60,
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u'1_hour': 1 * 3600,
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u'3_hours': 3 * 3600,
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u'6_hours': 6 * 3600,
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u'12_hours': 12 * 3600,
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u'1_day': 24 * 3600,
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u'2_days': 2 * 24 * 3600,
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u'5_days': 5 * 24 * 3600,
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u'10_days': 10 * 24 * 3600,
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u'15_days': 15 * 24 * 3600,
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u'20_days': 20 * 24 * 3600,
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u'1_month': 30 * 24 * 3600,
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u'2_months': 2 * 30 * 24 * 3600,
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u'6_months': 6 * 30 * 24 * 3600,
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u'1_year': 12 * 30 * 24 * 3600,
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u'never': 365 * 24 * 3600 * 100,
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}
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def __init__(self, uuid=None, uuid_length=None,
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content=None, expiration=None):
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self.content = content
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self.expiration = expiration
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if isinstance(self.content, unicode):
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self.content = self.content.encode('utf8')
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self.expiration = self.get_expiration(expiration)
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if not uuid:
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uuid = hashlib.sha1(self.content)\
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.digest().encode('base64').rstrip('=\n').replace('/', '-')
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if uuid_length: uuid = uuid[:uuid_length]
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self.uuid = uuid
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def get_expiration(self, expiration):
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"""
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Return a tuple with the date at which the Paste will expire
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or if it should be destroyed after first reading.
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Do not modify the value if it's already a date object or
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if it's burn_after_reading
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"""
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if (isinstance(expiration, datetime) or
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'burn_after_reading' in str(expiration)):
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return expiration
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try:
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return datetime.now() + timedelta(seconds=self.DURATIONS[expiration])
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except KeyError:
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return u'burn_after_reading'
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@classmethod
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def build_path(cls, *dirs):
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"""
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Generic static content path builder. Return a path to
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a location in the static content file dir.
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"""
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return os.path.join(settings.PASTE_FILES_ROOT, *dirs)
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@classmethod
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def get_path(cls, uuid):
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"""
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Return the file path of a paste given uuid
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"""
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return cls.build_path(uuid[:2], uuid[2:4], uuid)
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@property
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def path(self):
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"""
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Return the file path for this path. Use get_path().
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"""
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return self.get_path(self.uuid)
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@classmethod
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def load_from_file(cls, path):
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"""
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Return an instance of the paste object with the content of the
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given file.
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"""
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try:
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paste = open(path)
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uuid = os.path.basename(path)
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expiration = paste.next().strip()
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content = paste.next().strip()
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if "burn_after_reading" not in str(expiration):
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expiration = datetime.strptime(expiration, '%Y-%m-%d %H:%M:%S.%f')
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except StopIteration:
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raise TypeError(u'File %s is malformed' % path)
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except (IOError, OSError):
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raise ValueError(u'Can not open paste from file %s' % path)
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return Paste(uuid=uuid, expiration=expiration, content=content)
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@classmethod
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def load(cls, uuid):
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"""
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Return an instance of the paste object with the content of the
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file matching this uuid. Use load_from_file() and get_path()
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"""
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return cls.load_from_file(cls.get_path(uuid))
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def increment_counter(self):
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"""
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Increment pastes counter
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"""
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# simple counter incrementation
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# using lock file to prevent multi access to the file
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# could be improved.
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path = settings.PASTE_FILES_ROOT
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counter_file = os.path.join(path, 'counter')
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lock_file = os.path.join(path, 'counter.lock')
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if not os.path.isfile(lock_file):
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try:
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#make lock file
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flock = open(lock_file, "w")
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flock.write('lock')
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flock.close()
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# init counter (first time)
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if not os.path.isfile(counter_file):
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fcounter = open(counter_file, "w")
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fcounter.write('1')
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fcounter.close()
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# get counter value
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fcounter = open(counter_file, "r")
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counter_value = fcounter.read(50)
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fcounter.close()
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try:
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counter_value = long(counter_value) + 1
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except ValueError:
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counter_value = 1
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# write new value to counter
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fcounter = open(counter_file, "w")
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fcounter.write(str(counter_value))
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fcounter.close()
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#remove lock file
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os.remove(lock_file)
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finally:
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if os.path.isfile(lock_file):
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#remove lock file
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os.remove(lock_file)
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def save(self):
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"""
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Save the content of this paste to a file.
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"""
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head, tail = self.uuid[:2], self.uuid[2:4]
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# the static files are saved in project_dir/static/xx/yy/uuid
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# xx and yy are generated from the uuid (see get_path())
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# we need to check if they are created before writting
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# but since we want to prevent to many writes, we create
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# an in memory cache that will hold the result of this check fo
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# each worker. If the dir is not in cache, we check the FS, and
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# if the dir is not in there, we create the dir
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if head not in self.DIR_CACHE:
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self.DIR_CACHE.add(head)
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if not os.path.isdir(self.build_path(head)):
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os.makedirs(self.build_path(head, tail))
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self.DIR_CACHE.add((head, tail))
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if (head, tail) not in self.DIR_CACHE:
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path = self.build_path(head, tail)
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self.DIR_CACHE.add((head, tail))
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if not os.path.isdir(path):
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os.mkdir(path)
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# add a timestamp to burn after reading to allow
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# a quick period of time where you can redirect to the page without
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# deleting the paste
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if self.expiration == "burn_after_reading":
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self.expiration = self.expiration + '#%s' % datetime.now()
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# write the paste
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with open(self.path, 'w') as f:
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f.write(unicode(self.expiration) + '\n')
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f.write(self.content + '\n')
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return self
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@classmethod
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def get_pastes_count(cls):
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"""
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Return the number of created pastes.
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(must have option DISPLAY_COUNTER enabled for the pastes to be
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be counted)
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"""
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try:
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locale.setlocale(locale.LC_ALL, 'en_US')
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except:
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pass
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counter_file = os.path.join(settings.PASTE_FILES_ROOT, 'counter')
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try:
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count = long(open(counter_file).read(50))
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except (IOError, OSError):
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count = 0
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return locale.format("%d", long(count), grouping=True)
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@property
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def humanized_expiration(self):
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"""
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Return the expiration date in a human friendly format.
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In 3 minutes, or in 3 days or the 23/01/2102
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"""
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try:
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expiration = self.expiration - datetime.now()
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# in_seconds doesn't exist in python 2.6
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expiration = expiration.days * 24 * 60 * 60 + expiration.seconds
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except TypeError:
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return None
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if expiration < 60:
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return 'in %s s' % expiration
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if expiration < 60 * 60:
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return 'in %s m' % int(expiration / 60)
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if expiration < 60 * 60 * 24:
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return 'in %s h' % int(expiration / (60 * 60))
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if expiration < 60 * 60 * 24 * 10:
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return 'in %s days(s)' % int(expiration / (60 * 60 * 24))
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return 'the %s' % self.expiration.strftime('%m/%d/%Y')
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def delete(self):
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"""
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Delete the paste file.
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"""
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os.remove(self.path)
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