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0e7c97378e
Judging by comparing django 1.11 with django 2.2 code of this function, this shouldn't change any behavior.
80 lines
2.7 KiB
Python
80 lines
2.7 KiB
Python
# -*- coding: utf-8 -*-
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# See https://zulip.readthedocs.io/en/latest/subsystems/thumbnailing.html
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import base64
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import os
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import sys
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import urllib
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from urllib.parse import urljoin
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from django.conf import settings
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from django.utils.http import is_safe_url
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from libthumbor import CryptoURL
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ZULIP_PATH = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath('__file__'))))
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sys.path.append(ZULIP_PATH)
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from zthumbor.loaders.helpers import (
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THUMBOR_S3_TYPE, THUMBOR_LOCAL_FILE_TYPE, THUMBOR_EXTERNAL_TYPE
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)
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from zerver.lib.camo import get_camo_url
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def is_thumbor_enabled() -> bool:
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return settings.THUMBOR_URL != ''
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def user_uploads_or_external(url: str) -> bool:
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return not is_safe_url(url, allowed_hosts=None) or url.startswith("/user_uploads/")
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def get_source_type(url: str) -> str:
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if not url.startswith('/user_uploads/'):
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return THUMBOR_EXTERNAL_TYPE
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local_uploads_dir = settings.LOCAL_UPLOADS_DIR
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if local_uploads_dir:
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return THUMBOR_LOCAL_FILE_TYPE
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return THUMBOR_S3_TYPE
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def generate_thumbnail_url(path: str,
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size: str='0x0',
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is_camo_url: bool=False) -> str:
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path = urljoin("/", path)
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if not is_thumbor_enabled():
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if is_safe_url(path, allowed_hosts=None):
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return path
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return get_camo_url(path)
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if is_safe_url(path, allowed_hosts=None) and not path.startswith("/user_uploads/"):
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return path
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source_type = get_source_type(path)
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safe_url = base64.urlsafe_b64encode(path.encode()).decode('utf-8')
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image_url = '%s/source_type/%s' % (safe_url, source_type)
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width, height = map(int, size.split('x'))
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crypto = CryptoURL(key=settings.THUMBOR_KEY)
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smart_crop_enabled = True
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apply_filters = ['no_upscale()']
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if is_camo_url:
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smart_crop_enabled = False
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apply_filters.append('quality(100)')
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if size != '0x0':
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apply_filters.append('sharpen(0.5,0.2,true)')
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encrypted_url = crypto.generate(
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width=width,
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height=height,
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smart=smart_crop_enabled,
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filters=apply_filters,
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image_url=image_url
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)
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if settings.THUMBOR_URL == 'http://127.0.0.1:9995':
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# If THUMBOR_URL is the default then thumbor is hosted on same machine
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# as the Zulip server and we should serve a relative URL.
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# We add a /thumbor in front of the relative url because we make
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# use of a proxy pass to redirect request internally in Nginx to 9995
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# port where thumbor is running.
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thumbnail_url = '/thumbor' + encrypted_url
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else:
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thumbnail_url = urllib.parse.urljoin(settings.THUMBOR_URL, encrypted_url)
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return thumbnail_url
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