mirror of https://github.com/zulip/zulip.git
286 lines
10 KiB
Python
286 lines
10 KiB
Python
import base64
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import binascii
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import logging
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import os
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import random
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import secrets
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import shutil
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from datetime import timedelta
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from typing import IO, Any, Callable, Optional
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from django.conf import settings
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from django.core.signing import BadSignature, TimestampSigner
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from django.urls import reverse
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from zerver.lib.avatar_hash import user_avatar_path
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from zerver.lib.upload.base import (
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MEDIUM_AVATAR_SIZE,
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ZulipUploadBackend,
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create_attachment,
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resize_avatar,
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resize_emoji,
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resize_logo,
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sanitize_name,
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)
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from zerver.lib.utils import assert_is_not_none
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from zerver.models import Realm, RealmEmoji, UserProfile
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def write_local_file(type: str, path: str, file_data: bytes) -> None:
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file_path = os.path.join(assert_is_not_none(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 read_local_file(type: str, path: str) -> bytes:
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file_path = os.path.join(assert_is_not_none(settings.LOCAL_UPLOADS_DIR), type, path)
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with open(file_path, "rb") as f:
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return f.read()
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def delete_local_file(type: str, path: str) -> bool:
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file_path = os.path.join(assert_is_not_none(settings.LOCAL_UPLOADS_DIR), type, path)
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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.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 get_local_file_path(path_id: str) -> Optional[str]:
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local_path = os.path.join(assert_is_not_none(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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LOCAL_FILE_ACCESS_TOKEN_SALT = "local_file_"
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def generate_unauthed_file_access_url(path_id: str) -> str:
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signed_data = TimestampSigner(salt=LOCAL_FILE_ACCESS_TOKEN_SALT).sign(path_id)
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token = base64.b16encode(signed_data.encode()).decode()
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filename = path_id.split("/")[-1]
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return reverse("local_file_unauthed", args=[token, filename])
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def get_local_file_path_id_from_token(token: str) -> Optional[str]:
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signer = TimestampSigner(salt=LOCAL_FILE_ACCESS_TOKEN_SALT)
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try:
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signed_data = base64.b16decode(token).decode()
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path_id = signer.unsign(signed_data, max_age=timedelta(seconds=60))
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except (BadSignature, binascii.Error):
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return None
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return path_id
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class LocalUploadBackend(ZulipUploadBackend):
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def get_public_upload_root_url(self) -> str:
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return "/user_avatars/"
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def generate_message_upload_path(self, realm_id: str, uploaded_file_name: str) -> str:
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# Split into 256 subdirectories to prevent directories from getting too big
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return "/".join(
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[
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realm_id,
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format(random.randint(0, 255), "x"),
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secrets.token_urlsafe(18),
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sanitize_name(uploaded_file_name),
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]
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)
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def upload_message_file(
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self,
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uploaded_file_name: str,
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uploaded_file_size: int,
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content_type: Optional[str],
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file_data: bytes,
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user_profile: UserProfile,
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target_realm: Optional[Realm] = None,
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) -> str:
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if target_realm is None:
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target_realm = user_profile.realm
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path = self.generate_message_upload_path(str(target_realm.id), uploaded_file_name)
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write_local_file("files", path, file_data)
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create_attachment(uploaded_file_name, path, user_profile, target_realm, uploaded_file_size)
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return "/user_uploads/" + path
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def delete_message_image(self, path_id: str) -> bool:
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return delete_local_file("files", path_id)
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def write_avatar_images(self, file_path: str, image_data: bytes) -> None:
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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 upload_avatar_image(
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self,
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user_file: IO[bytes],
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acting_user_profile: UserProfile,
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target_user_profile: UserProfile,
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content_type: Optional[str] = None,
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) -> 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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self.write_avatar_images(file_path, image_data)
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def delete_avatar_image(self, user: UserProfile) -> None:
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path_id = user_avatar_path(user)
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delete_local_file("avatars", path_id + ".original")
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delete_local_file("avatars", path_id + ".png")
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delete_local_file("avatars", path_id + "-medium.png")
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def get_avatar_url(self, hash_key: str, medium: bool = False) -> str:
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medium_suffix = "-medium" if medium else ""
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return f"/user_avatars/{hash_key}{medium_suffix}.png"
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def copy_avatar(self, source_profile: UserProfile, target_profile: UserProfile) -> None:
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source_file_path = user_avatar_path(source_profile)
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target_file_path = user_avatar_path(target_profile)
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image_data = read_local_file("avatars", source_file_path + ".original")
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self.write_avatar_images(target_file_path, image_data)
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def realm_avatar_and_logo_path(self, realm: Realm) -> str:
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return os.path.join("avatars", str(realm.id), "realm")
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def upload_realm_icon_image(self, icon_file: IO[bytes], user_profile: UserProfile) -> None:
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upload_path = self.realm_avatar_and_logo_path(user_profile.realm)
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image_data = icon_file.read()
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write_local_file(upload_path, "icon.original", image_data)
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resized_data = resize_avatar(image_data)
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write_local_file(upload_path, "icon.png", resized_data)
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def get_realm_icon_url(self, realm_id: int, version: int) -> str:
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return f"/user_avatars/{realm_id}/realm/icon.png?version={version}"
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def upload_realm_logo_image(
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self, logo_file: IO[bytes], user_profile: UserProfile, night: bool
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) -> None:
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upload_path = self.realm_avatar_and_logo_path(user_profile.realm)
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if night:
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original_file = "night_logo.original"
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resized_file = "night_logo.png"
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else:
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original_file = "logo.original"
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resized_file = "logo.png"
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image_data = logo_file.read()
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write_local_file(upload_path, original_file, image_data)
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resized_data = resize_logo(image_data)
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write_local_file(upload_path, resized_file, resized_data)
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def get_realm_logo_url(self, realm_id: int, version: int, night: bool) -> str:
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if night:
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file_name = "night_logo.png"
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else:
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file_name = "logo.png"
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return f"/user_avatars/{realm_id}/realm/{file_name}?version={version}"
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def ensure_avatar_image(self, user_profile: UserProfile, is_medium: bool = False) -> None:
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file_extension = "-medium.png" if is_medium else ".png"
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file_path = user_avatar_path(user_profile)
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output_path = os.path.join(
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assert_is_not_none(settings.LOCAL_UPLOADS_DIR),
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"avatars",
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file_path + file_extension,
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)
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if os.path.isfile(output_path):
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return
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image_path = os.path.join(
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assert_is_not_none(settings.LOCAL_UPLOADS_DIR), "avatars", file_path + ".original"
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)
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with open(image_path, "rb") as f:
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image_data = f.read()
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if is_medium:
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resized_avatar = resize_avatar(image_data, MEDIUM_AVATAR_SIZE)
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else:
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resized_avatar = resize_avatar(image_data)
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write_local_file("avatars", file_path + file_extension, resized_avatar)
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def upload_emoji_image(
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self, emoji_file: IO[bytes], emoji_file_name: str, user_profile: UserProfile
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) -> bool:
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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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write_local_file("avatars", ".".join((emoji_path, "original")), image_data)
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resized_image_data, is_animated, still_image_data = resize_emoji(image_data)
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write_local_file("avatars", emoji_path, resized_image_data)
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if is_animated:
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assert still_image_data is not None
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still_path = RealmEmoji.STILL_PATH_ID_TEMPLATE.format(
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realm_id=user_profile.realm_id,
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emoji_filename_without_extension=os.path.splitext(emoji_file_name)[0],
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)
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write_local_file("avatars", still_path, still_image_data)
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return is_animated
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def get_emoji_url(self, emoji_file_name: str, realm_id: int, still: bool = False) -> str:
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if still:
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return os.path.join(
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"/user_avatars",
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RealmEmoji.STILL_PATH_ID_TEMPLATE.format(
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realm_id=realm_id,
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emoji_filename_without_extension=os.path.splitext(emoji_file_name)[0],
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),
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)
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else:
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return os.path.join(
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"/user_avatars",
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RealmEmoji.PATH_ID_TEMPLATE.format(
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realm_id=realm_id, emoji_file_name=emoji_file_name
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),
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)
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def upload_export_tarball(
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self,
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realm: Realm,
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tarball_path: str,
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percent_callback: Optional[Callable[[Any], None]] = None,
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) -> str:
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path = os.path.join(
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"exports",
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str(realm.id),
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secrets.token_urlsafe(18),
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os.path.basename(tarball_path),
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)
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abs_path = os.path.join(assert_is_not_none(settings.LOCAL_UPLOADS_DIR), "avatars", path)
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os.makedirs(os.path.dirname(abs_path), exist_ok=True)
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shutil.copy(tarball_path, abs_path)
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public_url = realm.uri + "/user_avatars/" + path
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return public_url
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def delete_export_tarball(self, export_path: str) -> Optional[str]:
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# Get the last element of a list in the form ['user_avatars', '<file_path>']
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assert export_path.startswith("/")
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file_path = export_path[1:].split("/", 1)[-1]
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if delete_local_file("avatars", file_path):
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return export_path
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return None
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def get_export_tarball_url(self, realm: Realm, export_path: str) -> str:
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# export_path has a leading `/`
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return realm.uri + export_path
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