app/views/thumbnails.py

   1 # Content DB
   2 # Copyright (C) 2018  rubenwardy
   3 #
   4 # This program is free software: you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation, either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  16
  17
  18 from flask import *
  19 from app import app
  20
  21 import glob, os
  22 from PIL import Image
  23
  24 ALLOWED_RESOLUTIONS=[(350,233)]
  25
  26 def mkdir(path):
  27         if not os.path.isdir(path):
  28                 os.mkdir(path)
  29
  30 mkdir("app/public/thumbnails/")
  31
  32 @app.route("/thumbnails/<img>")
  33 @app.route("/thumbnails/<int:w>x<int:h>/<img>")
  34 def make_thumbnail(img, w=350, h=233):
  35         if not (w, h) in ALLOWED_RESOLUTIONS:
  36                 abort(403)
  37
  38         mkdir("app/public/thumbnails/{}x{}/".format(w, h))
  39
  40         cache_filepath  = "public/thumbnails/{}x{}/{}".format(w, h, img)
  41         source_filepath = "public/uploads/" + img
  42
  43         im = Image.open("app/" + source_filepath)
  44         im.thumbnail((w, h), Image.ANTIALIAS)
  45         im.save("app/" + cache_filepath, optimize=True)
  46         return send_file(cache_filepath)