mirror of https://github.com/zulip/zulip.git
80 lines
2.7 KiB
Python
80 lines
2.7 KiB
Python
# -*- coding: utf-8 -*-
|
|
# See https://zulip.readthedocs.io/en/latest/subsystems/thumbnailing.html
|
|
import base64
|
|
import os
|
|
import sys
|
|
import urllib
|
|
from urllib.parse import urljoin
|
|
from django.conf import settings
|
|
from django.utils.http import is_safe_url
|
|
from libthumbor import CryptoURL
|
|
|
|
ZULIP_PATH = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath('__file__'))))
|
|
sys.path.append(ZULIP_PATH)
|
|
|
|
from zthumbor.loaders.helpers import (
|
|
THUMBOR_S3_TYPE, THUMBOR_LOCAL_FILE_TYPE, THUMBOR_EXTERNAL_TYPE
|
|
)
|
|
from zerver.lib.camo import get_camo_url
|
|
|
|
def is_thumbor_enabled() -> bool:
|
|
return settings.THUMBOR_URL != ''
|
|
|
|
def user_uploads_or_external(url: str) -> bool:
|
|
return not is_safe_url(url, allowed_hosts=None) or url.startswith("/user_uploads/")
|
|
|
|
def get_source_type(url: str) -> str:
|
|
if not url.startswith('/user_uploads/'):
|
|
return THUMBOR_EXTERNAL_TYPE
|
|
|
|
local_uploads_dir = settings.LOCAL_UPLOADS_DIR
|
|
if local_uploads_dir:
|
|
return THUMBOR_LOCAL_FILE_TYPE
|
|
return THUMBOR_S3_TYPE
|
|
|
|
def generate_thumbnail_url(path: str,
|
|
size: str='0x0',
|
|
is_camo_url: bool=False) -> str:
|
|
path = urljoin("/", path)
|
|
|
|
if not is_thumbor_enabled():
|
|
if is_safe_url(path, allowed_hosts=None):
|
|
return path
|
|
return get_camo_url(path)
|
|
|
|
if is_safe_url(path, allowed_hosts=None) and not path.startswith("/user_uploads/"):
|
|
return path
|
|
|
|
source_type = get_source_type(path)
|
|
safe_url = base64.urlsafe_b64encode(path.encode()).decode('utf-8')
|
|
image_url = '%s/source_type/%s' % (safe_url, source_type)
|
|
width, height = map(int, size.split('x'))
|
|
crypto = CryptoURL(key=settings.THUMBOR_KEY)
|
|
|
|
smart_crop_enabled = True
|
|
apply_filters = ['no_upscale()']
|
|
if is_camo_url:
|
|
smart_crop_enabled = False
|
|
apply_filters.append('quality(100)')
|
|
if size != '0x0':
|
|
apply_filters.append('sharpen(0.5,0.2,true)')
|
|
|
|
encrypted_url = crypto.generate(
|
|
width=width,
|
|
height=height,
|
|
smart=smart_crop_enabled,
|
|
filters=apply_filters,
|
|
image_url=image_url
|
|
)
|
|
|
|
if settings.THUMBOR_URL == 'http://127.0.0.1:9995':
|
|
# If THUMBOR_URL is the default then thumbor is hosted on same machine
|
|
# as the Zulip server and we should serve a relative URL.
|
|
# We add a /thumbor in front of the relative url because we make
|
|
# use of a proxy pass to redirect request internally in Nginx to 9995
|
|
# port where thumbor is running.
|
|
thumbnail_url = '/thumbor' + encrypted_url
|
|
else:
|
|
thumbnail_url = urllib.parse.urljoin(settings.THUMBOR_URL, encrypted_url)
|
|
return thumbnail_url
|