zulip/zerver/tests/test_upload_local.py

import os
import re
import shutil
import urllib
from io import StringIO
from urllib.parse import urlparse

from django.conf import settings
from django.http.response import StreamingHttpResponse
from PIL import Image

import zerver.lib.upload
from zerver.lib.avatar_hash import user_avatar_path
from zerver.lib.test_classes import UploadSerializeMixin, ZulipTestCase
from zerver.lib.test_helpers import (
    get_test_image_file,
    read_test_image_file,
)
from zerver.lib.upload import (
    delete_export_tarball,
    delete_message_attachment,
    upload_emoji_image,
    upload_export_tarball,
    upload_message_attachment,
)
from zerver.lib.upload.base import (
    DEFAULT_EMOJI_SIZE,
    MEDIUM_AVATAR_SIZE,
    resize_avatar,
)
from zerver.lib.upload.local import write_local_file
from zerver.models import (
    Attachment,
    RealmEmoji,
    get_realm,
    get_system_bot,
)


def destroy_uploads() -> None:
    assert settings.LOCAL_UPLOADS_DIR is not None
    if os.path.exists(settings.LOCAL_UPLOADS_DIR):
        shutil.rmtree(settings.LOCAL_UPLOADS_DIR)


class LocalStorageTest(UploadSerializeMixin, ZulipTestCase):
    def test_upload_message_attachment(self) -> None:
        user_profile = self.example_user("hamlet")
        uri = upload_message_attachment(
            "dummy.txt", len(b"zulip!"), "text/plain", b"zulip!", user_profile
        )

        base = "/user_uploads/"
        self.assertEqual(base, uri[: len(base)])
        path_id = re.sub("/user_uploads/", "", uri)
        assert settings.LOCAL_UPLOADS_DIR is not None
        assert settings.LOCAL_FILES_DIR is not None
        file_path = os.path.join(settings.LOCAL_FILES_DIR, path_id)
        self.assertTrue(os.path.isfile(file_path))

        uploaded_file = Attachment.objects.get(owner=user_profile, path_id=path_id)
        self.assert_length(b"zulip!", uploaded_file.size)

    def test_upload_message_attachment_local_cross_realm_path(self) -> None:
        """
        Verifies that the path of a file uploaded by a cross-realm bot to another
        realm is correct.
        """

        internal_realm = get_realm(settings.SYSTEM_BOT_REALM)
        zulip_realm = get_realm("zulip")
        user_profile = get_system_bot(settings.EMAIL_GATEWAY_BOT, internal_realm.id)
        self.assertEqual(user_profile.realm, internal_realm)

        uri = upload_message_attachment(
            "dummy.txt", len(b"zulip!"), "text/plain", b"zulip!", user_profile, zulip_realm
        )
        # Ensure the correct realm id of the target realm is used instead of the bot's realm.
        self.assertTrue(uri.startswith(f"/user_uploads/{zulip_realm.id}/"))

    def test_delete_message_attachment(self) -> None:
        self.login("hamlet")
        fp = StringIO("zulip!")
        fp.name = "zulip.txt"
        result = self.client_post("/json/user_uploads", {"file": fp})

        response_dict = self.assert_json_success(result)
        path_id = re.sub("/user_uploads/", "", response_dict["uri"])
        self.assertTrue(delete_message_attachment(path_id))

    def test_avatar_url(self) -> None:
        self.login("hamlet")
        with get_test_image_file("img.png") as image_file:
            result = self.client_post("/json/users/me/avatar", {"file": image_file})

        response_dict = self.assert_json_success(result)
        self.assertIn("avatar_url", response_dict)
        base = "/user_avatars/"
        url = self.assert_json_success(result)["avatar_url"]
        self.assertEqual(base, url[: len(base)])

        # That URL is accessible when logged out
        self.logout()
        result = self.client_get(url)
        self.assertEqual(result.status_code, 200)

        # We get a resized avatar from it
        image_data = read_test_image_file("img.png")
        resized_avatar = resize_avatar(image_data)
        assert isinstance(result, StreamingHttpResponse)
        self.assertEqual(resized_avatar, b"".join(result.streaming_content))

        with self.settings(DEVELOPMENT=False):
            # In production, this is an X-Accel-Redirect to the
            # on-disk content, which nginx serves
            result = self.client_get(url)
            self.assertEqual(result.status_code, 200)
            internal_redirect_path = urlparse(url).path.replace(
                "/user_avatars/", "/internal/local/user_avatars/"
            )
            self.assertEqual(result["X-Accel-Redirect"], internal_redirect_path)
            self.assertEqual(b"", result.content)

    def test_ensure_avatar_image(self) -> None:
        user_profile = self.example_user("hamlet")
        file_path = user_avatar_path(user_profile)

        write_local_file("avatars", file_path + ".original", read_test_image_file("img.png"))

        assert settings.LOCAL_UPLOADS_DIR is not None
        assert settings.LOCAL_AVATARS_DIR is not None
        image_path = os.path.join(settings.LOCAL_AVATARS_DIR, file_path + ".original")
        with open(image_path, "rb") as f:
            image_data = f.read()

        resized_avatar = resize_avatar(image_data)
        zerver.lib.upload.upload_backend.ensure_avatar_image(user_profile)
        output_path = os.path.join(settings.LOCAL_AVATARS_DIR, file_path + ".png")
        with open(output_path, "rb") as original_file:
            self.assertEqual(resized_avatar, original_file.read())

        resized_avatar = resize_avatar(image_data, MEDIUM_AVATAR_SIZE)
        zerver.lib.upload.upload_backend.ensure_avatar_image(user_profile, is_medium=True)
        output_path = os.path.join(settings.LOCAL_AVATARS_DIR, file_path + "-medium.png")
        with open(output_path, "rb") as original_file:
            self.assertEqual(resized_avatar, original_file.read())

    def test_emoji_upload(self) -> None:
        user_profile = self.example_user("hamlet")
        file_name = "emoji.png"

        with get_test_image_file("img.png") as image_file:
            upload_emoji_image(image_file, file_name, user_profile)

        emoji_path = RealmEmoji.PATH_ID_TEMPLATE.format(
            realm_id=user_profile.realm_id,
            emoji_file_name=file_name,
        )

        assert settings.LOCAL_AVATARS_DIR is not None
        file_path = os.path.join(settings.LOCAL_AVATARS_DIR, emoji_path)
        with open(file_path + ".original", "rb") as original_file:
            self.assertEqual(read_test_image_file("img.png"), original_file.read())

        expected_size = (DEFAULT_EMOJI_SIZE, DEFAULT_EMOJI_SIZE)
        with Image.open(file_path) as resized_image:
            self.assertEqual(expected_size, resized_image.size)

    def test_get_emoji_url(self) -> None:
        user_profile = self.example_user("hamlet")
        file_name = "emoji.png"

        with get_test_image_file("img.png") as image_file:
            upload_emoji_image(image_file, file_name, user_profile)
        url = zerver.lib.upload.upload_backend.get_emoji_url(file_name, user_profile.realm_id)

        emoji_path = RealmEmoji.PATH_ID_TEMPLATE.format(
            realm_id=user_profile.realm_id,
            emoji_file_name=file_name,
        )
        expected_url = f"/user_avatars/{emoji_path}"
        self.assertEqual(expected_url, url)

        file_name = "emoji.gif"
        with get_test_image_file("animated_img.gif") as image_file:
            upload_emoji_image(image_file, file_name, user_profile)
        url = zerver.lib.upload.upload_backend.get_emoji_url(file_name, user_profile.realm_id)
        still_url = zerver.lib.upload.upload_backend.get_emoji_url(
            file_name, user_profile.realm_id, still=True
        )

        emoji_path = RealmEmoji.PATH_ID_TEMPLATE.format(
            realm_id=user_profile.realm_id,
            emoji_file_name=file_name,
        )

        still_emoji_path = RealmEmoji.STILL_PATH_ID_TEMPLATE.format(
            realm_id=user_profile.realm_id,
            emoji_filename_without_extension=os.path.splitext(file_name)[0],
        )
        expected_url = f"/user_avatars/{emoji_path}"
        self.assertEqual(expected_url, url)
        expected_still_url = f"/user_avatars/{still_emoji_path}"
        self.assertEqual(expected_still_url, still_url)

    def test_tarball_upload_and_deletion(self) -> None:
        user_profile = self.example_user("iago")
        self.assertTrue(user_profile.is_realm_admin)

        assert settings.TEST_WORKER_DIR is not None
        tarball_path = os.path.join(settings.TEST_WORKER_DIR, "tarball.tar.gz")
        with open(tarball_path, "w") as f:
            f.write("dummy")

        assert settings.LOCAL_AVATARS_DIR is not None
        uri = upload_export_tarball(user_profile.realm, tarball_path)
        self.assertTrue(os.path.isfile(os.path.join(settings.LOCAL_AVATARS_DIR, tarball_path)))

        result = re.search(re.compile(r"([A-Za-z0-9\-_]{24})"), uri)
        if result is not None:
            random_name = result.group(1)
        expected_url = f"http://zulip.testserver/user_avatars/exports/{user_profile.realm_id}/{random_name}/tarball.tar.gz"
        self.assertEqual(expected_url, uri)

        # Delete the tarball.
        with self.assertLogs(level="WARNING") as warn_log:
            self.assertIsNone(delete_export_tarball("/not_a_file"))
        self.assertEqual(
            warn_log.output,
            ["WARNING:root:not_a_file does not exist. Its entry in the database will be removed."],
        )
        path_id = urllib.parse.urlparse(uri).path
        self.assertEqual(delete_export_tarball(path_id), path_id)

    def tearDown(self) -> None:
        destroy_uploads()
        super().tearDown()