Current File : //usr/lib/calibre/calibre/srv/books.py
#!/usr/bin/env python3
# License: GPLv3 Copyright: 2016, Kovid Goyal <kovid at kovidgoyal.net>
import errno
import json as jsonlib
import os
import tempfile
import time
from functools import partial
from hashlib import sha1
from threading import Lock, RLock
from calibre.constants import cache_dir, iswindows
from calibre.customize.ui import plugin_for_input_format
from calibre.srv.errors import BookNotFound, HTTPNotFound
from calibre.srv.metadata import book_as_json
from calibre.srv.render_book import RENDER_VERSION
from calibre.srv.routes import endpoint, json
from calibre.srv.utils import get_db, get_library_data
from calibre.utils.filenames import rmtree
from calibre.utils.serialize import json_dumps
from polyglot.builtins import as_unicode, itervalues
cache_lock = RLock()
queued_jobs = {}
failed_jobs = {}
def abspath(x):
x = os.path.abspath(x)
if iswindows and not x.startswith('\\\\?\\'):
x = '\\\\?\\' + os.path.abspath(x)
return x
_books_cache_dir = None
def books_cache_dir():
global _books_cache_dir
if _books_cache_dir:
return _books_cache_dir
base = abspath(os.path.join(cache_dir(), 'srvb'))
for d in 'sf':
try:
os.makedirs(os.path.join(base, d))
except OSError as e:
if e.errno != errno.EEXIST:
raise
_books_cache_dir = base
return base
def book_hash(library_uuid, book_id, fmt, size, mtime):
raw = json_dumps((library_uuid, book_id, fmt.upper(), size, mtime, RENDER_VERSION))
return as_unicode(sha1(raw).hexdigest())
staging_cleaned = False
def safe_remove(x, is_file=None):
if is_file is None:
is_file = os.path.isfile(x)
try:
os.remove(x) if is_file else rmtree(x, ignore_errors=True)
except OSError:
pass
def queue_job(ctx, copy_format_to, bhash, fmt, book_id, size, mtime):
global staging_cleaned
tdir = os.path.join(books_cache_dir(), 's')
if not staging_cleaned:
staging_cleaned = True
for x in os.listdir(tdir):
safe_remove(os.path.join(tdir, x))
fd, pathtoebook = tempfile.mkstemp(prefix='', suffix=('.' + fmt.lower()), dir=tdir)
with os.fdopen(fd, 'wb') as f:
copy_format_to(f)
tdir = tempfile.mkdtemp('', '', tdir)
job_id = ctx.start_job(f'Render book {book_id} ({fmt})', 'calibre.srv.render_book', 'render', args=(
pathtoebook, tdir, {'size':size, 'mtime':mtime, 'hash':bhash}),
job_done_callback=job_done, job_data=(bhash, pathtoebook, tdir))
queued_jobs[bhash] = job_id
return job_id
last_final_clean_time = 0
def clean_final(interval=24 * 60 * 60):
global last_final_clean_time
now = time.time()
if now - last_final_clean_time < interval:
return
last_final_clean_time = now
fdir = os.path.join(books_cache_dir(), 'f')
for x in os.listdir(fdir):
try:
tm = os.path.getmtime(os.path.join(fdir, x, 'calibre-book-manifest.json'))
except OSError:
continue
if now - tm >= interval:
# This book has not been accessed for a long time, delete it
safe_remove(x)
def job_done(job):
with cache_lock:
bhash, pathtoebook, tdir = job.data
queued_jobs.pop(bhash, None)
safe_remove(pathtoebook)
if job.failed:
failed_jobs[bhash] = (job.was_aborted, job.traceback)
safe_remove(tdir, False)
else:
try:
clean_final()
dest = os.path.join(books_cache_dir(), 'f', bhash)
safe_remove(dest, False)
os.rename(tdir, dest)
except Exception:
import traceback
failed_jobs[bhash] = (False, traceback.format_exc())
@endpoint('/book-manifest/{book_id}/{fmt}', postprocess=json, types={'book_id':int})
def book_manifest(ctx, rd, book_id, fmt):
db, library_id = get_library_data(ctx, rd)[:2]
force_reload = rd.query.get('force_reload') == '1'
if plugin_for_input_format(fmt) is None:
raise HTTPNotFound('The format %s cannot be viewed' % fmt.upper())
if not ctx.has_id(rd, db, book_id):
raise BookNotFound(book_id, db)
with db.safe_read_lock:
fm = db.format_metadata(book_id, fmt, allow_cache=False)
if not fm:
raise HTTPNotFound(f'No {fmt} format for the book (id:{book_id}) in the library: {library_id}')
size, mtime = map(int, (fm['size'], time.mktime(fm['mtime'].utctimetuple())*10))
bhash = book_hash(db.library_id, book_id, fmt, size, mtime)
with cache_lock:
mpath = abspath(os.path.join(books_cache_dir(), 'f', bhash, 'calibre-book-manifest.json'))
if force_reload:
safe_remove(mpath, True)
try:
os.utime(mpath, None)
with lopen(mpath, 'rb') as f:
ans = jsonlib.load(f)
ans['metadata'] = book_as_json(db, book_id)
user = rd.username or None
ans['last_read_positions'] = db.get_last_read_positions(book_id, fmt, user) if user else []
ans['annotations_map'] = db.annotations_map_for_book(book_id, fmt, user_type='web', user=user or '*')
return ans
except OSError as e:
if e.errno != errno.ENOENT:
raise
x = failed_jobs.pop(bhash, None)
if x is not None:
return {'aborted':x[0], 'traceback':x[1], 'job_status':'finished'}
job_id = queued_jobs.get(bhash)
if job_id is None:
job_id = queue_job(ctx, partial(db.copy_format_to, book_id, fmt), bhash, fmt, book_id, size, mtime)
status, result, tb, aborted = ctx.job_status(job_id)
return {'aborted': aborted, 'traceback':tb, 'job_status':status, 'job_id':job_id}
@endpoint('/book-file/{book_id}/{fmt}/{size}/{mtime}/{+name}', types={'book_id':int, 'size':int, 'mtime':int})
def book_file(ctx, rd, book_id, fmt, size, mtime, name):
db, library_id = get_library_data(ctx, rd)[:2]
if not ctx.has_id(rd, db, book_id):
raise BookNotFound(book_id, db)
bhash = book_hash(db.library_id, book_id, fmt, size, mtime)
base = abspath(os.path.join(books_cache_dir(), 'f'))
mpath = abspath(os.path.join(base, bhash, name))
if not mpath.startswith(base):
raise HTTPNotFound(f'No book file with hash: {bhash} and name: {name}')
try:
return rd.filesystem_file_with_custom_etag(lopen(mpath, 'rb'), bhash, name)
except OSError as e:
if e.errno != errno.ENOENT:
raise
raise HTTPNotFound(f'No book file with hash: {bhash} and name: {name}')
@endpoint('/book-get-last-read-position/{library_id}/{+which}', postprocess=json)
def get_last_read_position(ctx, rd, library_id, which):
'''
Get last read position data for the specified books, where which is of the form:
book_id1-fmt1_book_id2-fmt2,...
'''
db = get_db(ctx, rd, library_id)
user = rd.username or None
if not user:
raise HTTPNotFound('login required for sync')
ans = {}
allowed_book_ids = ctx.allowed_book_ids(rd, db)
for item in which.split('_'):
book_id, fmt = item.partition('-')[::2]
try:
book_id = int(book_id)
except Exception:
continue
if book_id not in allowed_book_ids:
continue
key = f'{book_id}:{fmt}'
ans[key] = db.get_last_read_positions(book_id, fmt, user)
return ans
@endpoint('/book-set-last-read-position/{library_id}/{book_id}/{+fmt}', types={'book_id': int}, methods=('POST',))
def set_last_read_position(ctx, rd, library_id, book_id, fmt):
db = get_db(ctx, rd, library_id)
user = rd.username or None
if not ctx.has_id(rd, db, book_id):
raise BookNotFound(book_id, db)
try:
data = jsonlib.load(rd.request_body_file)
device, cfi, pos_frac = data['device'], data['cfi'], data['pos_frac']
except Exception:
raise HTTPNotFound('Invalid data')
db.set_last_read_position(
book_id, fmt, user=user, device=device, cfi=cfi or None, pos_frac=pos_frac)
rd.outheaders['Content-type'] = 'text/plain'
return b''
@endpoint('/book-get-annotations/{library_id}/{+which}', postprocess=json)
def get_annotations(ctx, rd, library_id, which):
'''
Get annotations and last read position data for the specified books, where which is of the form:
book_id1-fmt1_book_id2-fmt2,...
'''
db = get_db(ctx, rd, library_id)
user = rd.username or '*'
ans = {}
allowed_book_ids = ctx.allowed_book_ids(rd, db)
for item in which.split('_'):
book_id, fmt = item.partition('-')[::2]
try:
book_id = int(book_id)
except Exception:
continue
if book_id not in allowed_book_ids:
continue
key = f'{book_id}:{fmt}'
ans[key] = {
'last_read_positions': db.get_last_read_positions(book_id, fmt, user),
'annotations_map': db.annotations_map_for_book(book_id, fmt, user_type='web', user=user) if user else {}
}
return ans
@endpoint('/book-update-annotations/{library_id}/{book_id}/{+fmt}', types={'book_id': int}, methods=('POST',))
def update_annotations(ctx, rd, library_id, book_id, fmt):
db = get_db(ctx, rd, library_id)
user = rd.username or '*'
if not ctx.has_id(rd, db, book_id):
raise BookNotFound(book_id, db)
try:
amap = jsonlib.load(rd.request_body_file)
except Exception:
raise HTTPNotFound('Invalid data')
alist = []
for val in itervalues(amap):
if val:
alist.extend(val)
db.merge_annotations_for_book(book_id, fmt, alist, user_type='web', user=user)
return b''
mathjax_lock = Lock()
mathjax_manifest = None
def manifest_as_json():
return P('mathjax/manifest.json', data=True, allow_user_override=False)
def get_mathjax_manifest():
global mathjax_manifest
with mathjax_lock:
if mathjax_manifest is None:
mathjax_manifest = jsonlib.loads(manifest_as_json())
return mathjax_manifest
@endpoint('/mathjax/{+which=""}', auth_required=False)
def mathjax(ctx, rd, which):
manifest = get_mathjax_manifest()
if not which:
return rd.etagged_dynamic_response(manifest['etag'], manifest_as_json, content_type='application/json; charset=UTF-8')
if which not in manifest['files']:
raise HTTPNotFound('No MathJax file named: %s' % which)
path = os.path.abspath(P('mathjax/' + which, allow_user_override=False))
if not path.startswith(P('mathjax', allow_user_override=False)):
raise HTTPNotFound('No MathJax file named: %s' % which)
return rd.filesystem_file_with_constant_etag(lopen(path, 'rb'), manifest['etag'])
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