mirror of https://github.com/zulip/zulip.git
558 lines
21 KiB
Python
558 lines
21 KiB
Python
from typing import Any, Dict, Mapping, Optional, Tuple, Text
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from django.utils.translation import ugettext as _
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from django.conf import settings
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from django.template.defaultfilters import slugify
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from django.core.files import File
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from django.http import HttpRequest
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from django.db.models import Sum
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from jinja2 import Markup as mark_safe
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import unicodedata
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from zerver.lib.avatar_hash import user_avatar_path
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from zerver.lib.exceptions import JsonableError, ErrorCode
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from zerver.lib.str_utils import NonBinaryStr
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from boto.s3.bucket import Bucket
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from boto.s3.key import Key
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from boto.s3.connection import S3Connection
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from mimetypes import guess_type, guess_extension
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from zerver.models import get_user_profile_by_id, RealmEmoji
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from zerver.models import Attachment
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from zerver.models import Realm, RealmEmoji, UserProfile, Message
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import urllib
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import base64
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import os
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import re
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from PIL import Image, ImageOps
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import io
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import random
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import logging
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DEFAULT_AVATAR_SIZE = 100
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MEDIUM_AVATAR_SIZE = 500
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DEFAULT_EMOJI_SIZE = 64
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# Performance Note:
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#
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# For writing files to S3, the file could either be stored in RAM
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# (if it is less than 2.5MiB or so) or an actual temporary file on disk.
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#
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# Because we set FILE_UPLOAD_MAX_MEMORY_SIZE to 0, only the latter case
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# should occur in practice.
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#
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# This is great, because passing the pseudofile object that Django gives
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# you to boto would be a pain.
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# To come up with a s3 key we randomly generate a "directory". The
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# "file name" is the original filename provided by the user run
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# through a sanitization function.
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class RealmUploadQuotaError(JsonableError):
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code = ErrorCode.REALM_UPLOAD_QUOTA
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attachment_url_re = re.compile('[/\-]user[\-_]uploads[/\.-].*?(?=[ )]|\Z)')
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def attachment_url_to_path_id(attachment_url: Text) -> Text:
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path_id_raw = re.sub('[/\-]user[\-_]uploads[/\.-]', '', attachment_url)
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# Remove any extra '.' after file extension. These are probably added by the user
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return re.sub('[.]+$', '', path_id_raw, re.M)
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def sanitize_name(value: NonBinaryStr) -> Text:
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"""
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Sanitizes a value to be safe to store in a Linux filesystem, in
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S3, and in a URL. So unicode is allowed, but not special
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characters other than ".", "-", and "_".
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This implementation is based on django.utils.text.slugify; it is
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modified by:
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* adding '.' and '_' to the list of allowed characters.
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* preserving the case of the value.
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"""
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value = unicodedata.normalize('NFKC', value)
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value = re.sub('[^\w\s._-]', '', value, flags=re.U).strip()
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return mark_safe(re.sub('[-\s]+', '-', value, flags=re.U))
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def random_name(bytes: int=60) -> Text:
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return base64.urlsafe_b64encode(os.urandom(bytes)).decode('utf-8')
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class BadImageError(JsonableError):
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code = ErrorCode.BAD_IMAGE
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def resize_avatar(image_data: bytes, size: int=DEFAULT_AVATAR_SIZE) -> bytes:
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try:
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im = Image.open(io.BytesIO(image_data))
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im = ImageOps.fit(im, (size, size), Image.ANTIALIAS)
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except IOError:
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raise BadImageError("Could not decode image; did you upload an image file?")
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out = io.BytesIO()
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im.save(out, format='png')
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return out.getvalue()
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def resize_emoji(image_data: bytes, size: int=DEFAULT_EMOJI_SIZE) -> bytes:
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try:
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im = Image.open(io.BytesIO(image_data))
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image_format = im.format
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if image_format == 'GIF' and im.is_animated:
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if im.size[0] != im.size[1]:
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raise JsonableError(
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_("Animated emoji must have the same width and height."))
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elif im.size[0] > size:
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raise JsonableError(
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_("Animated emoji can't be larger than 64px in width or height."))
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else:
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return image_data
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im = ImageOps.fit(im, (size, size), Image.ANTIALIAS)
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except IOError:
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raise BadImageError("Could not decode image; did you upload an image file?")
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out = io.BytesIO()
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im.save(out, format=image_format)
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return out.getvalue()
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### Common
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class ZulipUploadBackend:
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def upload_message_image(self, uploaded_file_name: Text, uploaded_file_size: int,
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content_type: Optional[Text], file_data: bytes,
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user_profile: UserProfile,
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target_realm: Optional[Realm]=None) -> Text:
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raise NotImplementedError()
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def upload_avatar_image(self, user_file: File,
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acting_user_profile: UserProfile,
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target_user_profile: UserProfile) -> None:
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raise NotImplementedError()
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def delete_message_image(self, path_id: Text) -> bool:
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raise NotImplementedError()
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def get_avatar_url(self, hash_key: Text, medium: bool=False) -> Text:
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raise NotImplementedError()
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def ensure_medium_avatar_image(self, user_profile: UserProfile) -> None:
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raise NotImplementedError()
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def upload_realm_icon_image(self, icon_file: File, user_profile: UserProfile) -> None:
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raise NotImplementedError()
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def get_realm_icon_url(self, realm_id: int, version: int) -> Text:
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raise NotImplementedError()
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def upload_emoji_image(self, emoji_file: File, emoji_file_name: Text, user_profile: UserProfile) -> None:
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raise NotImplementedError()
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def get_emoji_url(self, emoji_file_name: Text, realm_id: int) -> Text:
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raise NotImplementedError()
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### S3
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def get_bucket(conn: S3Connection, bucket_name: Text) -> Bucket:
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# Calling get_bucket() with validate=True can apparently lead
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# to expensive S3 bills:
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# http://www.appneta.com/blog/s3-list-get-bucket-default/
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# The benefits of validation aren't completely clear to us, and
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# we want to save on our bills, so we set the validate flag to False.
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# (We think setting validate to True would cause us to fail faster
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# in situations where buckets don't exist, but that shouldn't be
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# an issue for us.)
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bucket = conn.get_bucket(bucket_name, validate=False)
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return bucket
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def upload_image_to_s3(
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bucket_name: NonBinaryStr,
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file_name: Text,
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content_type: Optional[Text],
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user_profile: UserProfile,
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contents: bytes) -> None:
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conn = S3Connection(settings.S3_KEY, settings.S3_SECRET_KEY)
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bucket = get_bucket(conn, bucket_name)
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key = Key(bucket)
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key.key = file_name
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key.set_metadata("user_profile_id", str(user_profile.id))
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key.set_metadata("realm_id", str(user_profile.realm_id))
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if content_type is not None:
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headers = {'Content-Type': content_type} # type: Optional[Dict[Text, Text]]
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else:
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headers = None
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key.set_contents_from_string(contents, headers=headers) # type: ignore # https://github.com/python/typeshed/issues/1552
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def currently_used_upload_space(realm: Realm) -> int:
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used_space = Attachment.objects.filter(realm=realm).aggregate(Sum('size'))['size__sum']
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if used_space is None:
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return 0
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return used_space
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def check_upload_within_quota(realm: Realm, uploaded_file_size: int) -> None:
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upload_quota = realm.upload_quota_bytes()
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if upload_quota is None:
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return
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used_space = currently_used_upload_space(realm)
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if (used_space + uploaded_file_size) > upload_quota:
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raise RealmUploadQuotaError(_("Upload would exceed your organization's upload quota."))
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def get_file_info(request: HttpRequest, user_file: File) -> Tuple[Text, int, Optional[Text]]:
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uploaded_file_name = user_file.name
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assert isinstance(uploaded_file_name, str)
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content_type = request.GET.get('mimetype')
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if content_type is None:
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guessed_type = guess_type(uploaded_file_name)[0]
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if guessed_type is not None:
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content_type = guessed_type
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else:
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extension = guess_extension(content_type)
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if extension is not None:
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uploaded_file_name = uploaded_file_name + extension
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uploaded_file_name = urllib.parse.unquote(uploaded_file_name)
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uploaded_file_size = user_file.size
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return uploaded_file_name, uploaded_file_size, content_type
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def get_signed_upload_url(path: Text) -> Text:
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conn = S3Connection(settings.S3_KEY, settings.S3_SECRET_KEY)
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return conn.generate_url(15, 'GET', bucket=settings.S3_AUTH_UPLOADS_BUCKET, key=path)
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def get_realm_for_filename(path: Text) -> Optional[int]:
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conn = S3Connection(settings.S3_KEY, settings.S3_SECRET_KEY)
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key = get_bucket(conn, settings.S3_AUTH_UPLOADS_BUCKET).get_key(path)
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if key is None:
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# This happens if the key does not exist.
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return None
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return get_user_profile_by_id(key.metadata["user_profile_id"]).realm_id
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class S3UploadBackend(ZulipUploadBackend):
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def upload_message_image(self, uploaded_file_name: Text, uploaded_file_size: int,
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content_type: Optional[Text], file_data: bytes,
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user_profile: UserProfile, target_realm: Optional[Realm]=None) -> Text:
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bucket_name = settings.S3_AUTH_UPLOADS_BUCKET
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if target_realm is None:
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target_realm = user_profile.realm
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s3_file_name = "/".join([
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str(target_realm.id),
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random_name(18),
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sanitize_name(uploaded_file_name)
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])
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url = "/user_uploads/%s" % (s3_file_name,)
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upload_image_to_s3(
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bucket_name,
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s3_file_name,
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content_type,
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user_profile,
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file_data
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)
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create_attachment(uploaded_file_name, s3_file_name, user_profile, uploaded_file_size)
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return url
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def delete_message_image(self, path_id: Text) -> bool:
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conn = S3Connection(settings.S3_KEY, settings.S3_SECRET_KEY)
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bucket = get_bucket(conn, settings.S3_AUTH_UPLOADS_BUCKET)
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# check if file exists
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key = bucket.get_key(path_id)
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if key is not None:
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bucket.delete_key(key)
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return True
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file_name = path_id.split("/")[-1]
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logging.warning("%s does not exist. Its entry in the database will be removed." % (file_name,))
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return False
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def upload_avatar_image(self, user_file: File,
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acting_user_profile: UserProfile,
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target_user_profile: UserProfile) -> None:
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content_type = guess_type(user_file.name)[0]
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bucket_name = settings.S3_AVATAR_BUCKET
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s3_file_name = user_avatar_path(target_user_profile)
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image_data = user_file.read()
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upload_image_to_s3(
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bucket_name,
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s3_file_name + ".original",
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content_type,
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target_user_profile,
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image_data,
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)
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# custom 500px wide version
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resized_medium = resize_avatar(image_data, MEDIUM_AVATAR_SIZE)
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upload_image_to_s3(
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bucket_name,
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s3_file_name + "-medium.png",
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"image/png",
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target_user_profile,
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resized_medium
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)
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resized_data = resize_avatar(image_data)
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upload_image_to_s3(
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bucket_name,
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s3_file_name,
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'image/png',
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target_user_profile,
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resized_data,
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)
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# See avatar_url in avatar.py for URL. (That code also handles the case
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# that users use gravatar.)
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def get_avatar_url(self, hash_key: Text, medium: bool=False) -> Text:
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bucket = settings.S3_AVATAR_BUCKET
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medium_suffix = "-medium.png" if medium else ""
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# ?x=x allows templates to append additional parameters with &s
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return "https://%s.s3.amazonaws.com/%s%s?x=x" % (bucket, hash_key, medium_suffix)
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def upload_realm_icon_image(self, icon_file: File, user_profile: UserProfile) -> None:
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content_type = guess_type(icon_file.name)[0]
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bucket_name = settings.S3_AVATAR_BUCKET
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s3_file_name = os.path.join(str(user_profile.realm.id), 'realm', 'icon')
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image_data = icon_file.read()
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upload_image_to_s3(
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bucket_name,
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s3_file_name + ".original",
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content_type,
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user_profile,
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image_data,
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)
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resized_data = resize_avatar(image_data)
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upload_image_to_s3(
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bucket_name,
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s3_file_name + ".png",
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'image/png',
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user_profile,
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resized_data,
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)
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# See avatar_url in avatar.py for URL. (That code also handles the case
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# that users use gravatar.)
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def get_realm_icon_url(self, realm_id: int, version: int) -> Text:
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bucket = settings.S3_AVATAR_BUCKET
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# ?x=x allows templates to append additional parameters with &s
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return "https://%s.s3.amazonaws.com/%s/realm/icon.png?version=%s" % (bucket, realm_id, version)
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def ensure_medium_avatar_image(self, user_profile: UserProfile) -> None:
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file_path = user_avatar_path(user_profile)
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s3_file_name = file_path
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bucket_name = settings.S3_AVATAR_BUCKET
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conn = S3Connection(settings.S3_KEY, settings.S3_SECRET_KEY)
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bucket = get_bucket(conn, bucket_name)
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key = bucket.get_key(file_path)
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image_data = key.get_contents_as_string()
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resized_medium = resize_avatar(image_data, MEDIUM_AVATAR_SIZE) # type: ignore # image_data is `bytes`, boto subs are wrong
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upload_image_to_s3(
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bucket_name,
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s3_file_name + "-medium.png",
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"image/png",
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user_profile,
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resized_medium
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)
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def upload_emoji_image(self, emoji_file: File, emoji_file_name: Text,
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user_profile: UserProfile) -> None:
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content_type = guess_type(emoji_file.name)[0]
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bucket_name = settings.S3_AVATAR_BUCKET
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emoji_path = RealmEmoji.PATH_ID_TEMPLATE.format(
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realm_id=user_profile.realm_id,
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emoji_file_name=emoji_file_name
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)
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image_data = emoji_file.read()
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resized_image_data = resize_emoji(image_data)
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upload_image_to_s3(
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bucket_name,
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".".join((emoji_path, "original")),
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content_type,
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user_profile,
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image_data,
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)
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upload_image_to_s3(
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bucket_name,
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emoji_path,
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content_type,
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user_profile,
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resized_image_data,
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)
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def get_emoji_url(self, emoji_file_name: Text, realm_id: int) -> Text:
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bucket = settings.S3_AVATAR_BUCKET
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emoji_path = RealmEmoji.PATH_ID_TEMPLATE.format(realm_id=realm_id,
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emoji_file_name=emoji_file_name)
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return "https://%s.s3.amazonaws.com/%s" % (bucket, emoji_path)
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### Local
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def write_local_file(type: Text, path: Text, file_data: bytes) -> None:
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file_path = os.path.join(settings.LOCAL_UPLOADS_DIR, type, path)
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os.makedirs(os.path.dirname(file_path), exist_ok=True)
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with open(file_path, 'wb') as f:
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f.write(file_data)
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def get_local_file_path(path_id: Text) -> Optional[Text]:
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local_path = os.path.join(settings.LOCAL_UPLOADS_DIR, 'files', path_id)
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if os.path.isfile(local_path):
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return local_path
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else:
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return None
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class LocalUploadBackend(ZulipUploadBackend):
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def upload_message_image(self, uploaded_file_name: Text, uploaded_file_size: int,
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content_type: Optional[Text], file_data: bytes,
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user_profile: UserProfile, target_realm: Optional[Realm]=None) -> Text:
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# Split into 256 subdirectories to prevent directories from getting too big
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path = "/".join([
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str(user_profile.realm_id),
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format(random.randint(0, 255), 'x'),
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random_name(18),
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sanitize_name(uploaded_file_name)
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])
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write_local_file('files', path, file_data)
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create_attachment(uploaded_file_name, path, user_profile, uploaded_file_size)
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return '/user_uploads/' + path
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def delete_message_image(self, path_id: Text) -> bool:
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file_path = os.path.join(settings.LOCAL_UPLOADS_DIR, 'files', path_id)
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if os.path.isfile(file_path):
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# This removes the file but the empty folders still remain.
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os.remove(file_path)
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return True
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file_name = path_id.split("/")[-1]
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logging.warning("%s does not exist. Its entry in the database will be removed." % (file_name,))
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return False
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def upload_avatar_image(self, user_file: File,
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acting_user_profile: UserProfile,
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target_user_profile: UserProfile) -> None:
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file_path = user_avatar_path(target_user_profile)
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image_data = user_file.read()
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write_local_file('avatars', file_path + '.original', image_data)
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resized_data = resize_avatar(image_data)
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write_local_file('avatars', file_path + '.png', resized_data)
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resized_medium = resize_avatar(image_data, MEDIUM_AVATAR_SIZE)
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write_local_file('avatars', file_path + '-medium.png', resized_medium)
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def get_avatar_url(self, hash_key: Text, medium: bool=False) -> Text:
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# ?x=x allows templates to append additional parameters with &s
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medium_suffix = "-medium" if medium else ""
|
|
return "/user_avatars/%s%s.png?x=x" % (hash_key, medium_suffix)
|
|
|
|
def upload_realm_icon_image(self, icon_file: File, user_profile: UserProfile) -> None:
|
|
upload_path = os.path.join('avatars', str(user_profile.realm.id), 'realm')
|
|
|
|
image_data = icon_file.read()
|
|
write_local_file(
|
|
upload_path,
|
|
'icon.original',
|
|
image_data)
|
|
|
|
resized_data = resize_avatar(image_data)
|
|
write_local_file(upload_path, 'icon.png', resized_data)
|
|
|
|
def get_realm_icon_url(self, realm_id: int, version: int) -> Text:
|
|
# ?x=x allows templates to append additional parameters with &s
|
|
return "/user_avatars/%s/realm/icon.png?version=%s" % (realm_id, version)
|
|
|
|
def ensure_medium_avatar_image(self, user_profile: UserProfile) -> None:
|
|
file_path = user_avatar_path(user_profile)
|
|
|
|
output_path = os.path.join(settings.LOCAL_UPLOADS_DIR, "avatars", file_path + "-medium.png")
|
|
if os.path.isfile(output_path):
|
|
return
|
|
|
|
image_path = os.path.join(settings.LOCAL_UPLOADS_DIR, "avatars", file_path + ".original")
|
|
image_data = open(image_path, "rb").read()
|
|
resized_medium = resize_avatar(image_data, MEDIUM_AVATAR_SIZE)
|
|
write_local_file('avatars', file_path + '-medium.png', resized_medium)
|
|
|
|
def upload_emoji_image(self, emoji_file: File, emoji_file_name: Text,
|
|
user_profile: UserProfile) -> None:
|
|
emoji_path = RealmEmoji.PATH_ID_TEMPLATE.format(
|
|
realm_id= user_profile.realm_id,
|
|
emoji_file_name=emoji_file_name
|
|
)
|
|
|
|
image_data = emoji_file.read()
|
|
resized_image_data = resize_emoji(image_data)
|
|
write_local_file(
|
|
'avatars',
|
|
".".join((emoji_path, "original")),
|
|
image_data)
|
|
write_local_file(
|
|
'avatars',
|
|
emoji_path,
|
|
resized_image_data)
|
|
|
|
def get_emoji_url(self, emoji_file_name: Text, realm_id: int) -> Text:
|
|
return os.path.join(
|
|
"/user_avatars",
|
|
RealmEmoji.PATH_ID_TEMPLATE.format(realm_id=realm_id, emoji_file_name=emoji_file_name))
|
|
|
|
# Common and wrappers
|
|
if settings.LOCAL_UPLOADS_DIR is not None:
|
|
upload_backend = LocalUploadBackend() # type: ZulipUploadBackend
|
|
else:
|
|
upload_backend = S3UploadBackend()
|
|
|
|
def delete_message_image(path_id: Text) -> bool:
|
|
return upload_backend.delete_message_image(path_id)
|
|
|
|
def upload_avatar_image(user_file: File, acting_user_profile: UserProfile,
|
|
target_user_profile: UserProfile) -> None:
|
|
upload_backend.upload_avatar_image(user_file, acting_user_profile, target_user_profile)
|
|
|
|
def upload_icon_image(user_file: File, user_profile: UserProfile) -> None:
|
|
upload_backend.upload_realm_icon_image(user_file, user_profile)
|
|
|
|
def upload_emoji_image(emoji_file: File, emoji_file_name: Text, user_profile: UserProfile) -> None:
|
|
upload_backend.upload_emoji_image(emoji_file, emoji_file_name, user_profile)
|
|
|
|
def upload_message_image(uploaded_file_name: Text, uploaded_file_size: int,
|
|
content_type: Optional[Text], file_data: bytes,
|
|
user_profile: UserProfile, target_realm: Optional[Realm]=None) -> Text:
|
|
return upload_backend.upload_message_image(uploaded_file_name, uploaded_file_size,
|
|
content_type, file_data, user_profile,
|
|
target_realm=target_realm)
|
|
|
|
def claim_attachment(user_profile: UserProfile,
|
|
path_id: Text,
|
|
message: Message,
|
|
is_message_realm_public: bool) -> None:
|
|
attachment = Attachment.objects.get(path_id=path_id)
|
|
attachment.messages.add(message)
|
|
attachment.is_realm_public = attachment.is_realm_public or is_message_realm_public
|
|
attachment.save()
|
|
|
|
def create_attachment(file_name: Text, path_id: Text, user_profile: UserProfile,
|
|
file_size: int) -> bool:
|
|
Attachment.objects.create(file_name=file_name, path_id=path_id, owner=user_profile,
|
|
realm=user_profile.realm, size=file_size)
|
|
return True
|
|
|
|
def upload_message_image_from_request(request: HttpRequest, user_file: File,
|
|
user_profile: UserProfile) -> Text:
|
|
uploaded_file_name, uploaded_file_size, content_type = get_file_info(request, user_file)
|
|
return upload_message_image(uploaded_file_name, uploaded_file_size,
|
|
content_type, user_file.read(), user_profile)
|