mirror of https://github.com/zulip/zulip.git
40 lines
1.6 KiB
Python
40 lines
1.6 KiB
Python
# -*- coding: utf-8 -*-
|
|
# See https://zulip.readthedocs.io/en/latest/subsystems/thumbnailing.html
|
|
from django.shortcuts import redirect
|
|
from django.utils.translation import ugettext as _
|
|
from django.http import HttpRequest, HttpResponse, HttpResponseForbidden
|
|
from django.conf import settings
|
|
from typing import Optional
|
|
from zerver.models import UserProfile, validate_attachment_request
|
|
from zerver.lib.request import has_request_variables, REQ
|
|
from zerver.lib.thumbnail import generate_thumbnail_url
|
|
import urllib
|
|
|
|
def validate_thumbnail_request(user_profile: UserProfile, path: str) -> Optional[bool]:
|
|
# path here does not have a leading / as it is parsed from request hitting the
|
|
# thumbnail endpoint (defined in urls.py) that way.
|
|
if path.startswith('user_uploads/'):
|
|
path_id = path[len('user_uploads/'):]
|
|
return validate_attachment_request(user_profile, path_id)
|
|
|
|
# This is an external link and we don't enforce restricted view policy here.
|
|
return True
|
|
|
|
@has_request_variables
|
|
def backend_serve_thumbnail(request: HttpRequest, user_profile: UserProfile,
|
|
url: str=REQ(), size_requested: str=REQ("size")) -> HttpResponse:
|
|
if not validate_thumbnail_request(user_profile, url):
|
|
return HttpResponseForbidden(_("<p>You are not authorized to view this file.</p>"))
|
|
|
|
size = None
|
|
if size_requested == 'thumbnail':
|
|
size = '0x100'
|
|
elif size_requested == 'full':
|
|
size = '0x0'
|
|
|
|
if size is None:
|
|
return HttpResponseForbidden(_("<p>Invalid size.</p>"))
|
|
|
|
thumbnail_url = generate_thumbnail_url(url, size)
|
|
return redirect(thumbnail_url)
|