yafu.py

#!/usr/bin/env python3

# yafu - command line client for YaFU
# Copyright (C) 2016 Benjamin Abendroth
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import argparse, requests, re, os, pickle
from lxml import html
from time import time
from datetime import datetime, timedelta
from os.path import expanduser, isfile, basename, devnull
from urllib.parse import urlencode
from string import Template

DEFAULT_FORMAT = '''=== $basename $expired_str===
File: $file
Date: $date
Expires: $expire_date [$expires]
Type: $type
URL: $direct_url
Info: $info_url
Delete: $deletion_url
'''

RECORD_SHORTCUTS = {
   'b': 'basename',     'f': 'file',            'h': 'hidden',
   'i': 'info_url',     'd': 'deletion_url',    'u': 'direct_url',
   'D': 'date',         'e': 'expire_date',     'x': 'expired',
   'E': 'expires'
}

parser = argparse.ArgumentParser(prog='YaFU', description='Commandline client for YaFU')

# FILE OPTIONS
fileopts = parser.add_argument_group(title='File Options')
fileopts.add_argument('--db',    help='Database file', type=expanduser)
fileopts.add_argument('--no-db', help='Disable database', dest='db', action='store_const', const=devnull)

# ACTIONS
actions = parser.add_argument_group(title='Actions')
actions = actions.add_mutually_exclusive_group(required=True)
actions.add_argument('-d', '--delete',  help='Delete the given links', metavar='URL', nargs='+')
actions.add_argument('-u', '--upload',  help='Files to upload', metavar='FILE', nargs='+')
actions.add_argument('-l', '--list',    help='List the records in database', action='store_true')
actions.add_argument('-L', '--list-remote', help='List files on server', action='store_true')

# UPLOAD ACTION
ulcmd = parser.add_argument_group('Upload Options')
ulcmd.add_argument('-b', '--base-url',  help='Specify base-url')
ulcmd.add_argument('-e', '--email',     help='Specify email for file upload')
ulcmd.add_argument('-p', '--password',  help='Specify password for file upload')
ulcmd.add_argument('-c', '--comment',   help='Specify comment for file upload')
ulcmd.add_argument('-x', '--expires',   help='Specify expire time',
   choices=['30m', '1h', '6h', '1d', '3d', '1w', 'max'])

hide_group = ulcmd.add_mutually_exclusive_group()
hide_group.add_argument('--private', help='Hide file in public list [DEFAULT]', dest='hide', action='store_true')
hide_group.add_argument('--public',  help='Show file in public list', dest='hide', action='store_false')

# LIST ACTION
listcmd = parser.add_argument_group('List Options')
listcmd.add_argument('--show-expired',   help='List also expired records', action='store_true')
listcmd.add_argument('--date-format',    help='Specify date format')
listcmd.add_argument('-n', '--number',   help='Only list the last N records', type=int)
listcmd.add_argument('-f', '--format',   help='Specify output format', type=Template)

# REMOTE LIST ACTION
rlistcmd = parser.add_argument_group('List Remote Options')
#rlistcmd.add_argument('-d', '--download', help='Download files')
#rlistcmd.add_argument('-p', '--password', help='Download files')

parser.set_defaults(
   db =           '~/.config/yafu.db', 
   base_url =     'http://pixelbanane.de/yafu',
   format =       DEFAULT_FORMAT,
   date_format =  '%Y-%m-%d %H:%M:%S',
   hide =         True,
   expires =      '1w'
)

class RecordExpander(dict):

   def __init__(self, record, args):
      self._record = record
      self._cache = {}
      self._args = args

   def __getitem__(self, var):

      if len(var) == 1:
         try:
            var = RECORD_SHORTCUTS[var]
         except:
            raise Exception('Record shortcut not found: ' + var)

      if var in self._record:
         return self._record[var]

      if var not in self._cache:
         self._cache[var] = self.getVar(var)

      return self._cache[var]

   def getVar(self, var):

      if var == 'expired':
         return (self._record['expires'] != 'max' and
                 time() > self._record['expire_ts'])

      if var == 'expired_str':
         return 'EXPIRED ' if self['expired'] else ''

      if var == 'type':
         return 'Private' if self._record['hide'] else 'Public'

      if var == 'date':
         return datetime.fromtimestamp(self._record['date_ts']).strftime(self._args.date_format)

      if var == 'expire_date':
         if self._record['expire_ts'] == 0:
            return 'NEVER'

         return datetime.fromtimestamp(self._record['expire_ts']).strftime(self._args.date_format)
         
      if var == 'direct_url':
         return '%s/%s/%s' % (
                 self['base_url'], self['id'], self['basename_escaped'] )

      if var == 'info_url':
         return '%s/info/%s/%s' % (
                 self['base_url'], self['id'], self['basename_escaped'] )

      if var == 'deletion_url':
         return '%s/delete/%s' % (self['base_url'], self['delete_id'])

      if var == 'basename':
         return basename(self._record['file'])

      if var == 'basename_escaped':
         return urlencode({'': self['basename']})[1:]

      raise KeyError


def yafu_list(db, args):

   offset = args.number - len(db) if args.number else 0

   for record in db:
      offset += 1
      if offset < 0:
         continue

      record = RecordExpander(record, args)

      if args.show_expired or not record['expired']:
         print(args.format.safe_substitute(record))


def yafu_delete(url):

   params = { 'confirm': 'do it!' }
   response = requests.post(url, data=params)

def yafu_upload(file, args):
   if os.path.getsize(file) > 95000000:
      raise Exception("File too big")

   ul_files = { 'upload': open(file, 'rb').read() }
   # https://stackoverflow.com/questions/33717690/python-requests-post-with-unicode-filenames

   ul_parameters = {
      'filename':    basename(file),
      'expires':     args.expires,
      'email':       args.email,
      'password':    args.password,
      'comment':     args.comment
   }

   if args.hide:
      ul_parameters['hide'] = 'true'

   response = requests.post(args.base_url + '/index.php', files=ul_files, data=ul_parameters)

   try:
      match = re.search('href="[^"]*/info/([0-9]+)/[^"]+', response.text)
      ul_id = match.group(1)
   except:
      ul_id = 'NOT_AVAILABLE'
      print('Could not extract file id')

   try:
      match = re.search('http://.+/delete/([^"]+)', response.text)
      delete_id = match.group(1)
   except:
      delete_id = 'NOT_AVAILABLE'
      print('Could not extract delete id')

   record = {
      'file':        file,
      'base_url':    args.base_url,
      'id':          ul_id,
      'delete_id':   delete_id,
      'expires':     args.expires,
      'email':       args.email,
      'date_ts':     int( time() ),
      'hide':        args.hide,
      'expire_ts':   0
   }

   if record['expires'] != 'max':
      n = int(record['expires'][:-1])
      t = { 'm':'minutes', 'h':'hours', 'd':'days', 'w':'weeks' }[ record['expires'][-1] ]

      td = timedelta(**{t:n})

      record['expire_ts'] = int( ( datetime.now() + td ).timestamp() )

   return record

def yafu_list_remote(base_url):
    r = requests.get(base_url + '/?action=listfiles')
    t = html.fromstring(r.content)

    for tr in t.xpath('//tbody/tr'):
        tds = tr.xpath('.//td')

        a = tds[1].xpath('.//a')[0]
        url = '%s%s' % ('http://pixelbanane.de', a.attrib['href'])
        name = a.text_content()
        pw = True if tds[2].xpath('.//img') else False
        size = tds[3].text_content()
        expires = tds[4].xpath('text()')[0]
        #print(name, url, pw, size, expires)
        print(url)

args = parser.parse_args()

try:
   record_storage = pickle.load(open(args.db, 'rb'))
except:   
   record_storage = []

if args.upload:
   for file in args.upload:
      try:
        record = yafu_upload(file, args)

        fmt_record = RecordExpander(record, args)
        print(args.format.safe_substitute(fmt_record))

        record_storage.append(record)
      except Exception as e:
        print(file + ':', e)

elif args.delete:
   for url in args.delete:
      yafu_delete(url)

elif args.list:
   yafu_list(record_storage, args) 

elif args.list_remote:
    yafu_list_remote(args.base_url)

pickle.dump(record_storage, open(args.db, 'wb'))