174 lines
4.5 KiB
Python
174 lines
4.5 KiB
Python
# -*- coding: utf-8 -*-
|
|
# vi:si:et:sw=4:sts=4:ts=4
|
|
|
|
|
|
from io import BytesIO
|
|
from PIL import Image
|
|
import sqlite3
|
|
|
|
import tornado.concurrent
|
|
import tornado.gen
|
|
import tornado.ioloop
|
|
import tornado.web
|
|
|
|
from oxtornado import run_async
|
|
from settings import icons_db_path
|
|
from utils import resize_image
|
|
import db
|
|
|
|
import logging
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class Icons(dict):
|
|
def __init__(self, db):
|
|
self._db = db
|
|
self.create()
|
|
|
|
def connect(self):
|
|
conn = sqlite3.connect(self._db, timeout=10)
|
|
return conn
|
|
|
|
def create(self):
|
|
conn = self.connect()
|
|
c = conn.cursor()
|
|
c.execute('CREATE TABLE IF NOT EXISTS icon (id varchar(64) unique, data blob)')
|
|
c.execute('CREATE TABLE IF NOT EXISTS setting (key varchar(256) unique, value text)')
|
|
if int(self.get_setting(c, 'version', 0)) < 1:
|
|
self.set_setting(c, 'version', 1)
|
|
|
|
def get_setting(self, c, key, default=None):
|
|
c.execute('SELECT value FROM setting WHERE key = ?', (key, ))
|
|
for row in c:
|
|
return row[0]
|
|
return default
|
|
|
|
def set_setting(self, c, key, value):
|
|
c.execute('INSERT OR REPLACE INTO setting values (?, ?)', (key, str(value)))
|
|
|
|
def black(self):
|
|
img = Image.new('RGB', (80, 128))
|
|
o = BytesIO()
|
|
img.save(o, format='jpeg')
|
|
data = o.getvalue()
|
|
o.close()
|
|
return data
|
|
|
|
def __getitem__(self, id, default=None):
|
|
sql = 'SELECT data FROM icon WHERE id=?'
|
|
conn = self.connect()
|
|
c = conn.cursor()
|
|
c.execute(sql, (id, ))
|
|
data = default
|
|
for row in c:
|
|
data = row[0]
|
|
break
|
|
c.close()
|
|
conn.close()
|
|
return data
|
|
|
|
def __setitem__(self, id, data):
|
|
sql = 'INSERT OR REPLACE INTO icon values (?, ?)'
|
|
conn = self.connect()
|
|
c = conn.cursor()
|
|
data = sqlite3.Binary(data)
|
|
c.execute(sql, (id, data))
|
|
conn.commit()
|
|
c.close()
|
|
conn.close()
|
|
|
|
def __delitem__(self, id):
|
|
sql = 'DELETE FROM icon WHERE id = ?'
|
|
conn = self.connect()
|
|
c = conn.cursor()
|
|
c.execute(sql, (id, ))
|
|
conn.commit()
|
|
c.close()
|
|
conn.close()
|
|
|
|
icons = Icons(icons_db_path)
|
|
|
|
@run_async
|
|
def get_icon(id, type_, size, callback):
|
|
if size:
|
|
skey = '%s:%s:%s' % (type_, id, size)
|
|
data = icons[skey]
|
|
if data:
|
|
callback(bytes(data))
|
|
return
|
|
key = '%s:%s' % (type_, id)
|
|
data = icons[key]
|
|
if not data:
|
|
type_ = 'preview' if type_ == 'cover' else 'cover'
|
|
key = '%s:%s' % (type_, id)
|
|
if size:
|
|
skey = '%s:%s:%s' % (type_, id, size)
|
|
if size:
|
|
data = icons[skey]
|
|
if data:
|
|
size = None
|
|
if not data:
|
|
data = icons[key]
|
|
if not data:
|
|
data = icons.black()
|
|
size = None
|
|
if size:
|
|
data = icons[skey] = resize_image(data, size=size)
|
|
data = bytes(data) or ''
|
|
callback(data)
|
|
|
|
@run_async
|
|
def get_icon_app(id, type_, size, callback):
|
|
with db.session():
|
|
from item.models import Item
|
|
item = Item.get(id)
|
|
if not item:
|
|
callback('')
|
|
else:
|
|
if type_ == 'cover' and not item.meta.get('cover'):
|
|
type_ = 'preview'
|
|
if type_ == 'preview' and not item.files.count():
|
|
type_ = 'cover'
|
|
if size:
|
|
skey = '%s:%s:%s' % (type_, id, size)
|
|
key = '%s:%s' % (type_, id)
|
|
data = None
|
|
if size:
|
|
data = icons[skey]
|
|
if data:
|
|
size = None
|
|
if not data:
|
|
data = icons[key]
|
|
if not data:
|
|
data = icons.black()
|
|
size = None
|
|
if size:
|
|
data = icons[skey] = resize_image(data, size=size)
|
|
data = bytes(data) or ''
|
|
callback(data)
|
|
|
|
class IconHandler(tornado.web.RequestHandler):
|
|
|
|
def initialize(self):
|
|
pass
|
|
|
|
@tornado.web.asynchronous
|
|
@tornado.gen.coroutine
|
|
def get(self, id, type_, size=None):
|
|
|
|
size = int(size) if size else None
|
|
|
|
if type_ not in ('cover', 'preview'):
|
|
self.set_status(404)
|
|
return
|
|
|
|
self.set_header('Content-Type', 'image/jpeg')
|
|
|
|
response = yield tornado.gen.Task(get_icon, id, type_, size)
|
|
if not response:
|
|
self.set_status(404)
|
|
return
|
|
if self._finished:
|
|
return
|
|
self.write(response)
|