Current File : //usr/lib/calibre/calibre/srv/cdb.py
#!/usr/bin/env python3
# License: GPLv3 Copyright: 2017, Kovid Goyal <kovid at kovidgoyal.net>
import os
from functools import partial
from io import BytesIO
from calibre import as_unicode, sanitize_file_name
from calibre.db.cli import module_for_cmd
from calibre.ebooks.metadata.meta import get_metadata
from calibre.srv.changes import books_added, books_deleted, metadata
from calibre.srv.errors import HTTPBadRequest, HTTPForbidden, HTTPNotFound
from calibre.srv.metadata import book_as_json
from calibre.srv.routes import endpoint, json, msgpack_or_json
from calibre.srv.utils import get_db, get_library_data
from calibre.utils.imghdr import what
from calibre.utils.serialize import MSGPACK_MIME, json_loads, msgpack_loads
from calibre.utils.speedups import ReadOnlyFileBuffer
from polyglot.binary import from_base64_bytes
from polyglot.builtins import iteritems
receive_data_methods = {'GET', 'POST'}
@endpoint('/cdb/cmd/{which}/{version=0}', postprocess=msgpack_or_json, methods=receive_data_methods, cache_control='no-cache')
def cdb_run(ctx, rd, which, version):
try:
m = module_for_cmd(which)
except ImportError:
raise HTTPNotFound(f'No module named: {which}')
if not getattr(m, 'readonly', False):
ctx.check_for_write_access(rd)
if getattr(m, 'version', 0) != int(version):
raise HTTPNotFound(('The module {} is not available in version: {}.'
'Make sure the version of calibre used for the'
' server and calibredb match').format(which, version))
db = get_library_data(ctx, rd, strict_library_id=True)[0]
if ctx.restriction_for(rd, db):
raise HTTPForbidden('Cannot use the command-line db interface with a user who has per library restrictions')
raw = rd.read()
ct = rd.inheaders.get('Content-Type', all=True)
ct = {x.lower().partition(';')[0] for x in ct}
try:
if MSGPACK_MIME in ct:
args = msgpack_loads(raw)
elif 'application/json' in ct:
args = json_loads(raw)
else:
raise HTTPBadRequest('Only JSON or msgpack requests are supported')
except Exception:
raise HTTPBadRequest('args are not valid encoded data')
if getattr(m, 'needs_srv_ctx', False):
args = [ctx] + list(args)
try:
result = m.implementation(db, partial(ctx.notify_changes, db.backend.library_path), *args)
except Exception as err:
tb = ''
if not getattr(err, 'suppress_traceback', False):
import traceback
tb = traceback.format_exc()
return {'err': as_unicode(err), 'tb': tb}
return {'result': result}
@endpoint('/cdb/add-book/{job_id}/{add_duplicates}/{filename}/{library_id=None}',
needs_db_write=True, postprocess=json, methods=receive_data_methods, cache_control='no-cache')
def cdb_add_book(ctx, rd, job_id, add_duplicates, filename, library_id):
'''
Add a file as a new book. The file contents must be in the body of the request.
The response will also have the title/authors/languages read from the
metadata of the file/filename. It will contain a `book_id` field specifying
the id of the newly added book, or if add_duplicates is not specified and a
duplicate was found, no book_id will be present, instead there will be a
`duplicates` field specifying the title and authors for all duplicate
matches. It will also return the value of `job_id` as the `id` field and
`filename` as the `filename` field.
'''
db = get_db(ctx, rd, library_id)
if ctx.restriction_for(rd, db):
raise HTTPForbidden('Cannot use the add book interface with a user who has per library restrictions')
if not filename:
raise HTTPBadRequest('An empty filename is not allowed')
sfilename = sanitize_file_name(filename)
fmt = os.path.splitext(sfilename)[1]
fmt = fmt[1:] if fmt else None
if not fmt:
raise HTTPBadRequest('An filename with no extension is not allowed')
if isinstance(rd.request_body_file, BytesIO):
raise HTTPBadRequest('A request body containing the file data must be specified')
add_duplicates = add_duplicates in ('y', '1')
path = os.path.join(rd.tdir, sfilename)
rd.request_body_file.name = path
rd.request_body_file.seek(0)
mi = get_metadata(rd.request_body_file, stream_type=fmt, use_libprs_metadata=True)
rd.request_body_file.seek(0)
ids, duplicates = db.add_books([(mi, {fmt: rd.request_body_file})], add_duplicates=add_duplicates)
ans = {'title': mi.title, 'authors': mi.authors, 'languages': mi.languages, 'filename': filename, 'id': job_id}
if ids:
ans['book_id'] = ids[0]
ctx.notify_changes(db.backend.library_path, books_added(ids))
else:
ans['duplicates'] = [{'title': m.title, 'authors': m.authors} for m, _ in duplicates]
return ans
@endpoint('/cdb/delete-books/{book_ids}/{library_id=None}',
needs_db_write=True, postprocess=json, methods=receive_data_methods, cache_control='no-cache')
def cdb_delete_book(ctx, rd, book_ids, library_id):
db = get_db(ctx, rd, library_id)
if ctx.restriction_for(rd, db):
raise HTTPForbidden('Cannot use the delete book interface with a user who has per library restrictions')
try:
ids = {int(x) for x in book_ids.split(',')}
except Exception:
raise HTTPBadRequest(f'invalid book_ids: {book_ids}')
db.remove_books(ids)
ctx.notify_changes(db.backend.library_path, books_deleted(ids))
return {}
@endpoint('/cdb/set-cover/{book_id}/{library_id=None}', types={'book_id': int},
needs_db_write=True, postprocess=json, methods=receive_data_methods, cache_control='no-cache')
def cdb_set_cover(ctx, rd, book_id, library_id):
db = get_db(ctx, rd, library_id)
if ctx.restriction_for(rd, db):
raise HTTPForbidden('Cannot use the add book interface with a user who has per library restrictions')
rd.request_body_file.seek(0)
dirtied = db.set_cover({book_id: rd.request_body_file})
ctx.notify_changes(db.backend.library_path, metadata(dirtied))
return tuple(dirtied)
def load_payload_data(rd):
raw = rd.read()
ct = rd.inheaders.get('Content-Type', all=True)
ct = {x.lower().partition(';')[0] for x in ct}
try:
if MSGPACK_MIME in ct:
return msgpack_loads(raw)
elif 'application/json' in ct:
return json_loads(raw)
else:
raise HTTPBadRequest('Only JSON or msgpack requests are supported')
except Exception:
raise HTTPBadRequest('Invalid encoded data')
@endpoint('/cdb/set-fields/{book_id}/{library_id=None}', types={'book_id': int},
needs_db_write=True, postprocess=msgpack_or_json, methods=receive_data_methods, cache_control='no-cache')
def cdb_set_fields(ctx, rd, book_id, library_id):
db = get_db(ctx, rd, library_id)
if ctx.restriction_for(rd, db):
raise HTTPForbidden('Cannot use the set fields interface with a user who has per library restrictions')
data = load_payload_data(rd)
try:
changes, loaded_book_ids = data['changes'], frozenset(map(int, data.get('loaded_book_ids', ())))
all_dirtied = bool(data.get('all_dirtied'))
if not isinstance(changes, dict):
raise TypeError('changes must be a dict')
except Exception:
raise HTTPBadRequest(
'''Data must be of the form {'changes': {'title': 'New Title', ...}, 'loaded_book_ids':[book_id1, book_id2, ...]'}''')
dirtied = set()
cdata = changes.pop('cover', False)
if cdata is not False:
if cdata is not None:
try:
cdata = from_base64_bytes(cdata.split(',', 1)[-1])
except Exception:
raise HTTPBadRequest('Cover data is not valid base64 encoded data')
try:
fmt = what(None, cdata)
except Exception:
fmt = None
if fmt not in ('jpeg', 'png'):
raise HTTPBadRequest('Cover data must be either JPEG or PNG')
dirtied |= db.set_cover({book_id: cdata})
added_formats = changes.pop('added_formats', False)
if added_formats:
for data in added_formats:
try:
fmt = data['ext'].upper()
except Exception:
raise HTTPBadRequest('Format has no extension')
if fmt:
try:
fmt_data = from_base64_bytes(data['data_url'].split(',', 1)[-1])
except Exception:
raise HTTPBadRequest('Format data is not valid base64 encoded data')
if db.add_format(book_id, fmt, ReadOnlyFileBuffer(fmt_data)):
dirtied.add(book_id)
removed_formats = changes.pop('removed_formats', False)
if removed_formats:
db.remove_formats({book_id: list(removed_formats)})
dirtied.add(book_id)
for field, value in iteritems(changes):
dirtied |= db.set_field(field, {book_id: value})
ctx.notify_changes(db.backend.library_path, metadata(dirtied))
all_ids = dirtied if all_dirtied else (dirtied & loaded_book_ids)
all_ids |= {book_id}
return {bid: book_as_json(db, bid) for bid in all_ids}
@endpoint('/cdb/copy-to-library/{target_library_id}/{library_id=None}', needs_db_write=True,
postprocess=msgpack_or_json, methods=receive_data_methods, cache_control='no-cache')
def cdb_copy_to_library(ctx, rd, target_library_id, library_id):
db_src = get_db(ctx, rd, library_id)
db_dest = get_db(ctx, rd, target_library_id)
if ctx.restriction_for(rd, db_src) or ctx.restriction_for(rd, db_dest):
raise HTTPForbidden('Cannot use the copy to library interface with a user who has per library restrictions')
data = load_payload_data(rd)
try:
book_ids = {int(x) for x in data['book_ids']}
move_books = bool(data.get('move', False))
preserve_date = bool(data.get('preserve_date', True))
duplicate_action = data.get('duplicate_action') or 'add'
automerge_action = data.get('automerge_action') or 'overwrite'
except Exception:
raise HTTPBadRequest('Invalid encoded data, must be of the form: {book_ids: [id1, id2, ..]}')
if duplicate_action not in ('add', 'add_formats_to_existing', 'ignore'):
raise HTTPBadRequest('duplicate_action must be one of: add, add_formats_to_existing, ignore')
if automerge_action not in ('overwrite', 'ignore', 'new record'):
raise HTTPBadRequest('automerge_action must be one of: overwrite, ignore, new record')
response = {}
identical_books_data = None
if duplicate_action != 'add':
identical_books_data = db_dest.data_for_find_identical_books()
to_remove = set()
from calibre.db.copy_to_library import copy_one_book
for book_id in book_ids:
try:
rdata = copy_one_book(
book_id, db_src, db_dest, duplicate_action=duplicate_action, automerge_action=automerge_action,
preserve_uuid=move_books, preserve_date=preserve_date, identical_books_data=identical_books_data)
if move_books:
to_remove.add(book_id)
response[book_id] = {'ok': True, 'payload': rdata}
except Exception:
import traceback
response[book_id] = {'ok': False, 'payload': traceback.format_exc()}
if to_remove:
db_src.remove_books(to_remove, permanent=True)
return response
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