forked from jarun/buku
-
Notifications
You must be signed in to change notification settings - Fork 0
/
buku
executable file
·5441 lines (4530 loc) · 168 KB
/
buku
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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#!/usr/bin/env python3
#
# Bookmark management utility
#
# Copyright © 2015-2019 Arun Prakash Jana <[email protected]>
#
# 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 Buku. If not, see <http://www.gnu.org/licenses/>.
from enum import Enum
from itertools import chain
import argparse
import calendar
import cgi
import collections
import json
import logging
import os
import re
import shutil
import signal
import sqlite3
import struct
import subprocess
from subprocess import Popen, PIPE, DEVNULL
import sys
import tempfile
import threading
import time
from typing import Any, Dict, List, Optional, Tuple, Union
import webbrowser
try:
import readline
except ImportError:
import pyreadline as readline
from bs4 import BeautifulSoup
import certifi
import urllib3
from urllib3.exceptions import LocationParseError
from urllib3.util import parse_url, make_headers
try:
from mypy_extensions import TypedDict
except ImportError:
TypedDict = None # type: ignore
__version__ = '4.2.2'
__author__ = 'Arun Prakash Jana <[email protected]>'
__license__ = 'GPLv3'
# Global variables
INTERRUPTED = False # Received SIGINT
DELIM = ',' # Delimiter used to store tags in DB
SKIP_MIMES = {'.pdf', '.txt'}
PROMPTMSG = 'buku (? for help): ' # Prompt message string
# Default format specifiers to print records
ID_STR = '%d. %s [%s]\n'
ID_DB_STR = '%d. %s'
MUTE_STR = '%s (L)\n'
URL_STR = ' > %s\n'
DESC_STR = ' + %s\n'
TAG_STR = ' # %s\n'
# Colormap for color output from "googler" project
COLORMAP = {k: '\x1b[%sm' % v for k, v in {
'a': '30', 'b': '31', 'c': '32', 'd': '33',
'e': '34', 'f': '35', 'g': '36', 'h': '37',
'i': '90', 'j': '91', 'k': '92', 'l': '93',
'm': '94', 'n': '95', 'o': '96', 'p': '97',
'A': '30;1', 'B': '31;1', 'C': '32;1', 'D': '33;1',
'E': '34;1', 'F': '35;1', 'G': '36;1', 'H': '37;1',
'I': '90;1', 'J': '91;1', 'K': '92;1', 'L': '93;1',
'M': '94;1', 'N': '95;1', 'O': '96;1', 'P': '97;1',
'x': '0', 'X': '1', 'y': '7', 'Y': '7;1', 'z': '2',
}.items()}
USER_AGENT = 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0'
MYHEADERS = None # Default dictionary of headers
MYPROXY = None # Default proxy
TEXT_BROWSERS = ['elinks', 'links', 'links2', 'lynx', 'w3m', 'www-browser']
IGNORE_FF_BOOKMARK_FOLDERS = frozenset(["placesRoot", "bookmarksMenuFolder"])
# Set up logging
LOGGER = logging.getLogger()
LOGDBG = LOGGER.debug
LOGERR = LOGGER.error
class BukuCrypt:
"""Class to handle encryption and decryption of
the database file. Functionally a separate entity.
Involves late imports in the static functions but it
saves ~100ms each time. Given that encrypt/decrypt are
not done automatically and any one should be called at
a time, this doesn't seem to be an outrageous approach.
"""
# Crypto constants
BLOCKSIZE = 0x10000 # 64 KB blocks
SALT_SIZE = 0x20
CHUNKSIZE = 0x80000 # Read/write 512 KB chunks
@staticmethod
def get_filehash(filepath):
"""Get the SHA256 hash of a file.
Parameters
----------
filepath : str
Path to the file.
Returns
-------
hash : bytes
Hash digest of file.
"""
from hashlib import sha256
with open(filepath, 'rb') as fp:
hasher = sha256()
buf = fp.read(BukuCrypt.BLOCKSIZE)
while len(buf) > 0:
hasher.update(buf)
buf = fp.read(BukuCrypt.BLOCKSIZE)
return hasher.digest()
@staticmethod
def encrypt_file(iterations, dbfile=None):
"""Encrypt the bookmarks database file.
Parameters
----------
iterations : int
Number of iterations for key generation.
dbfile : str, optional
Custom database file path (including filename).
"""
try:
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives.ciphers import (Cipher, modes, algorithms)
from getpass import getpass
from hashlib import sha256
except ImportError:
LOGERR('cryptography lib(s) missing')
sys.exit(1)
if iterations < 1:
LOGERR('Iterations must be >= 1')
sys.exit(1)
if not dbfile:
dbfile = os.path.join(BukuDb.get_default_dbdir(), 'bookmarks.db')
encfile = dbfile + '.enc'
db_exists = os.path.exists(dbfile)
enc_exists = os.path.exists(encfile)
if db_exists and not enc_exists:
pass
elif not db_exists:
LOGERR('%s missing. Already encrypted?', dbfile)
sys.exit(1)
else:
# db_exists and enc_exists
LOGERR('Both encrypted and flat DB files exist!')
sys.exit(1)
password = getpass()
passconfirm = getpass()
if not password or not passconfirm:
LOGERR('Empty password')
sys.exit(1)
if password != passconfirm:
LOGERR('Passwords do not match')
sys.exit(1)
try:
# Get SHA256 hash of DB file
dbhash = BukuCrypt.get_filehash(dbfile)
except Exception as e:
LOGERR(e)
sys.exit(1)
# Generate random 256-bit salt and key
salt = os.urandom(BukuCrypt.SALT_SIZE)
key = ('%s%s' % (password, salt.decode('utf-8', 'replace'))).encode('utf-8')
for _ in range(iterations):
key = sha256(key).digest()
iv = os.urandom(16)
encryptor = Cipher(
algorithms.AES(key),
modes.CBC(iv),
backend=default_backend()
).encryptor()
filesize = os.path.getsize(dbfile)
try:
with open(dbfile, 'rb') as infp, open(encfile, 'wb') as outfp:
outfp.write(struct.pack('<Q', filesize))
outfp.write(salt)
outfp.write(iv)
# Embed DB file hash in encrypted file
outfp.write(dbhash)
while True:
chunk = infp.read(BukuCrypt.CHUNKSIZE)
if len(chunk) == 0:
break
if len(chunk) % 16 != 0:
chunk = '%s%s' % (chunk, ' ' * (16 - len(chunk) % 16))
outfp.write(encryptor.update(chunk) + encryptor.finalize())
os.remove(dbfile)
print('File encrypted')
sys.exit(0)
except Exception as e:
LOGERR(e)
sys.exit(1)
@staticmethod
def decrypt_file(iterations, dbfile=None):
"""Decrypt the bookmarks database file.
Parameters
----------
iterations : int
Number of iterations for key generation.
dbfile : str, optional
Custom database file path (including filename).
The '.enc' suffix must be omitted.
"""
try:
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives.ciphers import (Cipher, modes, algorithms)
from getpass import getpass
from hashlib import sha256
except ImportError:
LOGERR('cryptography lib(s) missing')
sys.exit(1)
if iterations < 1:
LOGERR('Decryption failed')
sys.exit(1)
if not dbfile:
dbfile = os.path.join(BukuDb.get_default_dbdir(), 'bookmarks.db')
else:
dbfile = os.path.abspath(dbfile)
dbpath, filename = os.path.split(dbfile)
encfile = dbfile + '.enc'
enc_exists = os.path.exists(encfile)
db_exists = os.path.exists(dbfile)
if enc_exists and not db_exists:
pass
elif not enc_exists:
LOGERR('%s missing', encfile)
sys.exit(1)
else:
# db_exists and enc_exists
LOGERR('Both encrypted and flat DB files exist!')
sys.exit(1)
password = getpass()
if not password:
LOGERR('Decryption failed')
sys.exit(1)
try:
with open(encfile, 'rb') as infp:
size = struct.unpack('<Q', infp.read(struct.calcsize('Q')))[0]
# Read 256-bit salt and generate key
salt = infp.read(32)
key = ('%s%s' % (password, salt.decode('utf-8', 'replace'))).encode('utf-8')
for _ in range(iterations):
key = sha256(key).digest()
iv = infp.read(16)
decryptor = Cipher(
algorithms.AES(key),
modes.CBC(iv),
backend=default_backend(),
).decryptor()
# Get original DB file's SHA256 hash from encrypted file
enchash = infp.read(32)
with open(dbfile, 'wb') as outfp:
while True:
chunk = infp.read(BukuCrypt.CHUNKSIZE)
if len(chunk) == 0:
break
outfp.write(decryptor.update(chunk) + decryptor.finalize())
outfp.truncate(size)
# Match hash of generated file with that of original DB file
dbhash = BukuCrypt.get_filehash(dbfile)
if dbhash != enchash:
os.remove(dbfile)
LOGERR('Decryption failed')
sys.exit(1)
else:
os.remove(encfile)
print('File decrypted')
except struct.error:
LOGERR('Tainted file')
sys.exit(1)
except Exception as e:
LOGERR(e)
sys.exit(1)
BookmarkVar = Tuple[int, str, Union[str, None], str, str, int]
class BukuDb:
"""Abstracts all database operations.
Attributes
----------
conn : sqlite database connection.
cur : sqlite database cursor.
json : bool
True if results should be printed in JSON format else False.
field_filter : int
Indicates format for displaying bookmarks. Default is 0.
chatty : bool
Sets the verbosity of the APIs. Default is False.
"""
def __init__(
self, json: Optional[bool] = False, field_filter: Optional[int] = 0, chatty: Optional[bool] = False,
dbfile: Optional[str] = None, colorize: Optional[bool] = True) -> None:
"""Database initialization API.
Parameters
----------
json : bool, optional
True if results should be printed in JSON format else False.
field_filter : int, optional
Indicates format for displaying bookmarks. Default is 0.
chatty : bool, optional
Sets the verbosity of the APIs. Default is False.
colorize : bool, optional
Indicates whether color should be used in output. Default is True.
"""
self.json = json
self.field_filter = field_filter
self.chatty = chatty
self.colorize = colorize
self.conn, self.cur = BukuDb.initdb(dbfile, self.chatty)
@staticmethod
def get_default_dbdir():
"""Determine the directory path where dbfile will be stored.
If the platform is Windows, use %APPDATA%
else if $XDG_DATA_HOME is defined, use it
else if $HOME exists, use it
else use the current directory.
Returns
-------
str
Path to database file.
"""
data_home = os.environ.get('XDG_DATA_HOME')
if data_home is None:
if os.environ.get('HOME') is None:
if sys.platform == 'win32':
data_home = os.environ.get('APPDATA')
if data_home is None:
return os.path.abspath('.')
else:
return os.path.abspath('.')
else:
data_home = os.path.join(os.environ.get('HOME'), '.local', 'share')
return os.path.join(data_home, 'buku')
@staticmethod
def initdb(dbfile: Optional[str] = None, chatty: Optional[bool] = False) -> Tuple[sqlite3.Connection, sqlite3.Cursor]:
"""Initialize the database connection.
Create DB file and/or bookmarks table if they don't exist.
Alert on encryption options on first execution.
Parameters
----------
dbfile : str, optional
Custom database file path (including filename).
chatty : bool
If True, shows informative message on DB creation.
Returns
-------
tuple
(connection, cursor).
"""
if not dbfile:
dbpath = BukuDb.get_default_dbdir()
filename = 'bookmarks.db'
dbfile = os.path.join(dbpath, filename)
else:
dbfile = os.path.abspath(dbfile)
dbpath, filename = os.path.split(dbfile)
try:
if not os.path.exists(dbpath):
os.makedirs(dbpath)
except Exception as e:
LOGERR(e)
os._exit(1)
db_exists = os.path.exists(dbfile)
enc_exists = os.path.exists(dbfile + '.enc')
if db_exists and not enc_exists:
pass
elif enc_exists and not db_exists:
LOGERR('Unlock database first')
sys.exit(1)
elif db_exists and enc_exists:
LOGERR('Both encrypted and flat DB files exist!')
sys.exit(1)
elif chatty:
# not db_exists and not enc_exists
print('DB file is being created at %s.\nYou should encrypt it.' % dbfile)
try:
# Create a connection
conn = sqlite3.connect(dbfile, check_same_thread=False)
conn.create_function('REGEXP', 2, regexp)
cur = conn.cursor()
# Create table if it doesn't exist
# flags: designed to be extended in future using bitwise masks
# Masks:
# 0b00000001: set title immutable
cur.execute('CREATE TABLE if not exists bookmarks ('
'id integer PRIMARY KEY, '
'URL text NOT NULL UNIQUE, '
'metadata text default \'\', '
'tags text default \',\', '
'desc text default \'\', '
'flags integer default 0)')
conn.commit()
except Exception as e:
LOGERR('initdb(): %s', e)
sys.exit(1)
return (conn, cur)
def get_rec_all(self):
"""Get all the bookmarks in the database.
Returns
-------
list
A list of tuples representing bookmark records.
"""
self.cur.execute('SELECT * FROM bookmarks')
return self.cur.fetchall()
def get_rec_by_id(self, index: int) -> Union[BookmarkVar, None]:
"""Get a bookmark from database by its ID.
Parameters
----------
index : int
DB index of bookmark record.
Returns
-------
tuple or None
Bookmark data, or None if index is not found.
"""
self.cur.execute('SELECT * FROM bookmarks WHERE id = ? LIMIT 1', (index,))
resultset = self.cur.fetchall()
return resultset[0] if resultset else None
def get_rec_id(self, url):
"""Check if URL already exists in DB.
Parameters
----------
url : str
A URL to search for in the DB.
Returns
-------
int
DB index, or -1 if URL not found in DB.
"""
self.cur.execute('SELECT id FROM bookmarks WHERE URL = ? LIMIT 1', (url,))
resultset = self.cur.fetchall()
return resultset[0][0] if resultset else -1
def get_max_id(self) -> int:
"""Fetch the ID of the last record.
Returns
-------
int
ID of the record if any record exists, else -1.
"""
self.cur.execute('SELECT MAX(id) from bookmarks')
resultset = self.cur.fetchall()
return -1 if resultset[0][0] is None else resultset[0][0]
def add_rec(
self,
url: str,
title_in: Optional[str] = None,
tags_in: Optional[str] = None,
desc: Optional[str] = None,
immutable: Optional[int] = 0,
delay_commit: Optional[bool] = False,
fetch: Optional[bool] = True) -> int:
"""Add a new bookmark.
Parameters
----------
url : str
URL to bookmark.
title_in :str, optional
Title to add manually. Default is None.
tags_in : str, optional
Comma-separated tags to add manually.
Must start and end with comma. Default is None.
desc : str, optional
Description of the bookmark. Default is None.
immutable : int, optional
Indicates whether to disable title fetch from web.
Default is 0.
delay_commit : bool, optional
True if record should not be committed to the DB,
leaving commit responsibility to caller. Default is False.
fetch : bool, optional
Fetch page from web and parse for data
Returns
-------
int
DB index of new bookmark on success, -1 on failure.
"""
# Return error for empty URL
if not url or url == '':
LOGERR('Invalid URL')
return -1
# Ensure that the URL does not exist in DB already
id = self.get_rec_id(url)
if id != -1:
LOGERR('URL [%s] already exists at index %d', url, id)
return -1
if fetch:
# Fetch data
ptitle, pdesc, ptags, mime, bad = network_handler(url)
if bad:
print('Malformed URL\n')
elif mime:
LOGDBG('HTTP HEAD requested')
elif ptitle == '' and title_in is None:
print('No title\n')
else:
LOGDBG('Title: [%s]', ptitle)
else:
ptitle = pdesc = ptags = ''
LOGDBG('ptags: [%s]', ptags)
if title_in is not None:
ptitle = title_in
# Fix up tags, if broken
tags_in = delim_wrap(tags_in)
# Process description
if desc is None:
desc = '' if pdesc is None else pdesc
try:
flagset = 0
if immutable == 1:
flagset |= immutable
qry = 'INSERT INTO bookmarks(URL, metadata, tags, desc, flags) VALUES (?, ?, ?, ?, ?)'
self.cur.execute(qry, (url, ptitle, tags_in, desc, flagset))
if not delay_commit:
self.conn.commit()
if self.chatty:
self.print_rec(self.cur.lastrowid)
return self.cur.lastrowid
except Exception as e:
LOGERR('add_rec(): %s', e)
return -1
def append_tag_at_index(self, index, tags_in, delay_commit=False):
"""Append tags to bookmark tagset at index.
Parameters
----------
index : int
DB index of the record. 0 indicates all records.
tags_in : str
Comma-separated tags to add manually.
delay_commit : bool, optional
True if record should not be committed to the DB,
leaving commit responsibility to caller. Default is False.
Returns
-------
bool
True on success, False on failure.
"""
if tags_in is None or tags_in == DELIM:
return True
if index == 0:
resp = read_in('Append the tags to ALL bookmarks? (y/n): ')
if resp != 'y':
return False
self.cur.execute('SELECT id, tags FROM bookmarks ORDER BY id ASC')
else:
self.cur.execute('SELECT id, tags FROM bookmarks WHERE id = ? LIMIT 1', (index,))
resultset = self.cur.fetchall()
if resultset:
query = 'UPDATE bookmarks SET tags = ? WHERE id = ?'
for row in resultset:
tags = row[1] + tags_in[1:]
tags = parse_tags([tags])
self.cur.execute(query, (tags, row[0],))
if self.chatty and not delay_commit:
self.print_rec(row[0])
else:
return False
if not delay_commit:
self.conn.commit()
return True
def delete_tag_at_index(self, index, tags_in, delay_commit=False, chatty=True):
"""Delete tags from bookmark tagset at index.
Parameters
----------
index : int
DB index of bookmark record. 0 indicates all records.
tags_in : str
Comma-separated tags to delete manually.
delay_commit : bool, optional
True if record should not be committed to the DB,
leaving commit responsibility to caller. Default is False.
chatty: bool, optional
Skip confirmation when set to False.
Returns
-------
bool
True on success, False on failure.
"""
if tags_in is None or tags_in == DELIM:
return True
tags_to_delete = tags_in.strip(DELIM).split(DELIM)
if index == 0:
if chatty:
resp = read_in('Delete the tag(s) from ALL bookmarks? (y/n): ')
if resp != 'y':
return False
count = 0
match = "'%' || ? || '%'"
for tag in tags_to_delete:
tag = delim_wrap(tag)
q = ("UPDATE bookmarks SET tags = replace(tags, '%s', '%s') "
"WHERE tags LIKE %s" % (tag, DELIM, match))
self.cur.execute(q, (tag,))
count += self.cur.rowcount
if count and not delay_commit:
self.conn.commit()
if self.chatty:
print('%d record(s) updated' % count)
return True
# Process a single index
# Use SELECT and UPDATE to handle multiple tags at once
query = 'SELECT id, tags FROM bookmarks WHERE id = ? LIMIT 1'
self.cur.execute(query, (index,))
resultset = self.cur.fetchall()
if resultset:
query = 'UPDATE bookmarks SET tags = ? WHERE id = ?'
for row in resultset:
tags = row[1]
for tag in tags_to_delete:
tags = tags.replace(delim_wrap(tag), DELIM)
self.cur.execute(query, (parse_tags([tags]), row[0],))
if self.chatty and not delay_commit:
self.print_rec(row[0])
if not delay_commit:
self.conn.commit()
else:
return False
return True
def update_rec(
self,
index: int,
url: Optional[str] = None,
title_in: Optional[str] = None,
tags_in: Optional[str] = None,
desc: Optional[str] = None,
immutable: Optional[int] = -1,
threads: Optional[int] = 4) -> bool:
"""Update an existing record at index.
Update all records if index is 0 and url is not specified.
URL is an exception because URLs are unique in DB.
Parameters
----------
index : int
DB index of record. 0 indicates all records.
url : str, optional
Bookmark address.
title_in : str, optional
Title to add manually.
tags_in : str, optional
Comma-separated tags to add manually. Must start and end with comma.
Prefix with '+,' to append to current tags.
Prefix with '-,' to delete from current tags.
desc : str, optional
Description of bookmark.
immutable : int, optional
Disable title fetch from web if 1. Default is -1.
threads : int, optional
Number of threads to use to refresh full DB. Default is 4.
Returns
-------
bool
True on success, False on Failure.
"""
arguments = [] # type: List[Any]
query = 'UPDATE bookmarks SET'
to_update = False
tag_modified = False
ret = False
# Update URL if passed as argument
if url is not None and url != '':
if index == 0:
LOGERR('All URLs cannot be same')
return False
query += ' URL = ?,'
arguments += (url,)
to_update = True
# Update tags if passed as argument
if tags_in is not None:
if tags_in in ('+,', '-,'):
LOGERR('Please specify a tag')
return False
if tags_in.startswith('+,'):
chatty = self.chatty
self.chatty = False
ret = self.append_tag_at_index(index, tags_in[1:])
self.chatty = chatty
tag_modified = True
elif tags_in.startswith('-,'):
chatty = self.chatty
self.chatty = False
ret = self.delete_tag_at_index(index, tags_in[1:])
self.chatty = chatty
tag_modified = True
else:
tags_in = delim_wrap(tags_in)
query += ' tags = ?,'
arguments += (tags_in,)
to_update = True
# Update description if passed as an argument
if desc is not None:
query += ' desc = ?,'
arguments += (desc,)
to_update = True
# Update immutable flag if passed as argument
if immutable != -1:
flagset = 1
if immutable == 1:
query += ' flags = flags | ?,'
elif immutable == 0:
query += ' flags = flags & ?,'
flagset = ~flagset
arguments += (flagset,)
to_update = True
# Update title
#
# 1. If --title has no arguments, delete existing title
# 2. If --title has arguments, update existing title
# 3. If --title option is omitted at cmdline:
# If URL is passed, update the title from web using the URL
# 4. If no other argument (url, tag, comment, immutable) passed,
# update title from web using DB URL (if title is mutable)
title_to_insert = None
pdesc = None
ptags = None
if title_in is not None:
title_to_insert = title_in
elif url is not None and url != '':
title_to_insert, pdesc, ptags, mime, bad = network_handler(url)
if bad:
print('Malformed URL')
elif mime:
LOGDBG('HTTP HEAD requested')
elif title_to_insert == '':
print('No title')
else:
LOGDBG('Title: [%s]', title_to_insert)
if not desc:
if not pdesc:
pdesc = ''
query += ' desc = ?,'
arguments += (pdesc,)
to_update = True
elif not to_update and not tag_modified:
ret = self.refreshdb(index, threads)
if ret and index and self.chatty:
self.print_rec(index)
return ret
if title_to_insert is not None:
query += ' metadata = ?,'
arguments += (title_to_insert,)
to_update = True
if not to_update: # Nothing to update
# Show bookmark if tags were appended to deleted
if tag_modified and self.chatty:
self.print_rec(index)
return ret
if index == 0: # Update all records
resp = read_in('Update ALL bookmarks? (y/n): ')
if resp != 'y':
return False
query = query[:-1]
else:
query = query[:-1] + ' WHERE id = ?'
arguments += (index,)
LOGDBG('update_rec query: "%s", args: %s', query, arguments)
try:
self.cur.execute(query, arguments)
self.conn.commit()
if self.cur.rowcount and self.chatty:
self.print_rec(index)
if self.cur.rowcount == 0:
LOGERR('No matching index %d', index)
return False
except sqlite3.IntegrityError:
LOGERR('URL already exists')
return False
except sqlite3.OperationalError as e:
LOGERR(e)
return False
return True
def refreshdb(self, index: int, threads: int) -> bool:
"""Refresh ALL records in the database.
Fetch title for each bookmark from the web and update the records.
Doesn't update the record if fetched title is empty.
Notes
-----
This API doesn't change DB index, URL or tags of a bookmark.
This API is verbose.
Parameters
----------
index : int
DB index of record to update. 0 indicates all records.
threads: int
Number of threads to use to refresh full DB. Default is 4.
"""
if index == 0:
self.cur.execute('SELECT id, url, flags FROM bookmarks ORDER BY id ASC')
else:
self.cur.execute('SELECT id, url, flags FROM bookmarks WHERE id = ? LIMIT 1', (index,))
resultset = self.cur.fetchall()
recs = len(resultset)
if not recs:
LOGERR('No matching index or title immutable or empty DB')
return False
# Set up strings to be printed
if self.colorize:
bad_url_str = '\x1b[1mIndex %d: Malformed URL\x1b[0m\n'
mime_str = '\x1b[1mIndex %d: HTTP HEAD requested\x1b[0m\n'
blank_url_str = '\x1b[1mIndex %d: No title\x1b[0m\n'
success_str = 'Title: [%s]\n\x1b[92mIndex %d: updated\x1b[0m\n'
else:
bad_url_str = 'Index %d: Malformed URL\n'
mime_str = 'Index %d: HTTP HEAD requested\n'
blank_url_str = 'Index %d: No title\n'
success_str = 'Title: [%s]\nIndex %d: updated\n'
done = {'value': 0} # count threads completed
processed = {'value': 0} # count number of records processed
# An additional call to generate default headers
# gen_headers() is called within network_handler()
# However, this initial call to setup headers
# ensures there is no race condition among the
# initial threads to setup headers
if not MYHEADERS:
gen_headers()
cond = threading.Condition()
cond.acquire()
def refresh(count, cond):
"""Inner function to fetch titles and update records.
Parameters
----------
count : int
Dummy input to adhere to convention.
cond : threading condition object.
"""
count = 0
while True:
query = 'UPDATE bookmarks SET'
arguments = []
cond.acquire()
if resultset:
row = resultset.pop()
else:
cond.release()