Init

fastapi_file_server/app/alembic.ini

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+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = ./app/alembic
+
+# template used to generate migration files
+# file_template = %%(rev)s_%%(slug)s
+
+# sys.path path, will be prepended to sys.path if present.
+# defaults to the current working directory.
+prepend_sys_path = .
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the python-dateutil library that can be
+# installed by adding `alembic[tz]` to the pip requirements
+# string value is passed to dateutil.tz.gettz()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the
+# "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; This defaults
+# to alembic/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path.
+# The path separator used here should be the separator specified by "version_path_separator"
+# version_locations = %(here)s/bar:%(here)s/bat:alembic/versions
+
+# version path separator; As mentioned above, this is the character used to split
+# version_locations. Valid values are:
+#
+# version_path_separator = :
+# version_path_separator = ;
+# version_path_separator = space
+version_path_separator = os  # default: use os.pathsep
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks = black
+# black.type = console_scripts
+# black.entrypoint = black
+# black.options = -l 79 REVISION_SCRIPT_FILENAME
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

fastapi_file_server/app/alembic/README

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+Generic single-database configuration.

fastapi_file_server/app/alembic/env.py

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+from logging.config import fileConfig
+
+from alembic import context
+import sys, os
+
+from sqlalchemy.engine import create_engine
+
+from core.db import DATABASE_URL
+
+
+myPath = os.path.dirname(os.path.abspath(__file__))
+sys.path.insert(0, myPath + '/../../')
+
+config = context.config
+
+
+from app.models import BaseMeta
+target_metadata = BaseMeta.metadata
+
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = create_engine(DATABASE_URL)
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

fastapi_file_server/app/alembic/script.py.mako

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+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade():
+    ${downgrades if downgrades else "pass"}

fastapi_file_server/app/alembic/versions/3bbf7cb4eaa2_.py

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+"""empty message
+
+Revision ID: 3bbf7cb4eaa2
+Revises: 5a32159504fd
+Create Date: 2021-09-27 17:18:27.635063
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = '3bbf7cb4eaa2'
+down_revision = '5a32159504fd'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('uploaded_files', 'upload_time',
+               existing_type=postgresql.TIMESTAMP(timezone=True),
+               nullable=True)
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('uploaded_files', 'upload_time',
+               existing_type=postgresql.TIMESTAMP(timezone=True),
+               nullable=False)
+    # ### end Alembic commands ###

fastapi_file_server/app/alembic/versions/5a32159504fd_.py

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+"""empty message
+
+Revision ID: 5a32159504fd
+Revises: 
+Create Date: 2021-09-27 16:23:39.987261
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '5a32159504fd'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('uploaded_files',
+    sa.Column('id', sa.BigInteger(), nullable=True),
+    sa.Column('backend', sa.String(length=16), nullable=False),
+    sa.Column('data', sa.JSON(), nullable=False),
+    sa.Column('upload_time', sa.DateTime(timezone=True), nullable=False),
+    sa.PrimaryKeyConstraint('id')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('uploaded_files')
+    # ### end Alembic commands ###

fastapi_file_server/app/models.py

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+from enum import Enum
+from datetime import datetime
+
+import ormar
+
+from core.db import metadata, database
+
+
+class BaseMeta(ormar.ModelMeta):
+    metadata = metadata
+    database = database
+
+
+class UploadBackends(str, Enum):
+    aiogram = 'aiogram'
+    telethon = 'telethon'
+
+
+class UploadedFile(ormar.Model):
+    class Meta(BaseMeta):
+        tablename = "uploaded_files"
+
+    id = ormar.BigInteger(primary_key=True, nullable=False)
+    backend = ormar.String(max_length=16, choices=list(UploadBackends))
+    data = ormar.JSON()
+    upload_time = ormar.DateTime(timezone=True, default=datetime.now)

fastapi_file_server/app/on_start.py

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+from app.services.file_uploader import FileUploader
+
+
+async def on_start():
+    await FileUploader.prepare()

fastapi_file_server/app/serializers.py

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+from datetime import datetime
+
+from pydantic import BaseModel
+
+
+class UploadedFile(BaseModel):
+    id: int
+    backend: str
+    data: dict
+    upload_time: datetime

fastapi_file_server/app/services/file_uploader.py

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+from typing import Optional
+from io import BytesIO
+
+from fastapi import UploadFile
+from telegram_files_storage import AiogramFilesStorage, TelethonFilesStorage
+
+from core.config import env_config
+from app.models import UploadedFile, UploadBackends
+
+
+class FileUploader:
+    AIOGRAM_STORAGES: list[AiogramFilesStorage] = []
+    TELETHON_STORAGES: list[TelethonFilesStorage] = []
+
+    _aiogram_storage_index = 0
+    _telethon_storage_index = 0
+
+    def __init__(self, file: UploadFile) -> None:
+        self.file = file
+        self.upload_data: Optional[dict] = None
+        self.upload_backend: Optional[UploadBackends] = None
+
+    async def _upload(self) -> bool:
+        if not self.AIOGRAM_STORAGES and not self.TELETHON_STORAGES:
+            raise ValueError("Files storage not exist!")
+
+        if await self._upload_via_aiogram():
+            return True
+
+        return await self._upload_via_telethon()
+
+    async def _upload_via_aiogram(self) -> bool:
+        if not self.AIOGRAM_STORAGES:
+            return False
+
+        data = await self.file.read()
+
+        if isinstance(data, str):
+            data = data.encode()
+
+        if len(data) > 50 * 1000 * 1000:
+            return False
+
+        bytes_io = BytesIO(data)
+        bytes_io.name = self.file.filename
+
+        storage = self.get_aiogram_storage()
+        upload_result = await storage.upload(bytes_io)
+
+        self.upload_data = {
+            'file_id': upload_result
+        }
+        self.upload_backend = UploadBackends.aiogram
+
+        return True
+
+    async def _upload_via_telethon(self) -> bool:
+        if not self.TELETHON_STORAGES:
+            return False
+
+        data = await self.file.read()
+
+        if isinstance(data, str):
+            data = data.encode()
+
+        bytes_io = BytesIO(data)
+        bytes_io.name = self.file.filename
+
+        storage = self.get_telethon_storage()
+        upload_result = await storage.upload(bytes_io)
+
+        self.upload_data = {
+            'chat_id': storage.chat_id,
+            'message_id': upload_result
+        }
+        self.upload_backend = UploadBackends.telethon
+
+        return True
+
+    async def _save_to_db(self) -> UploadedFile:
+        return await UploadedFile.objects.create(
+            backend=self.upload_backend,
+            data=self.upload_data,
+        )
+
+    @classmethod
+    async def prepare(cls):
+        if env_config.BOT_TOKENS:
+            cls.AIOGRAM_STORAGES: list[AiogramFilesStorage] = [
+                AiogramFilesStorage(env_config.TELEGRAM_CHAT_ID, token) for token in env_config.BOT_TOKENS
+            ]
+
+        if env_config.TELETHON_APP_CONFIG and env_config.TELETHON_SESSIONS:
+            cls.TELETHON_STORAGES: list[TelethonFilesStorage] = [
+                TelethonFilesStorage(env_config.TELEGRAM_CHAT_ID, env_config.TELETHON_APP_CONFIG.APP_ID, env_config.TELETHON_APP_CONFIG.API_HASH, session)
+                for session in env_config.TELETHON_SESSIONS
+            ]
+
+        for storage in [*cls.AIOGRAM_STORAGES, *cls.TELETHON_STORAGES]:
+            await storage.prepare()
+
+    @classmethod
+    def get_aiogram_storage(cls) -> AiogramFilesStorage:
+        if not cls.AIOGRAM_STORAGES:
+            raise ValueError("Aiogram storage not exist!")
+
+        cls._aiogram_storage_index = (cls._aiogram_storage_index + 1) % len(cls.AIOGRAM_STORAGES)
+
+        return cls.AIOGRAM_STORAGES[cls._aiogram_storage_index]
+
+    @classmethod
+    def get_telethon_storage(cls) -> TelethonFilesStorage:
+        if not cls.TELETHON_STORAGES:
+            raise ValueError("Telethon storage not exists!")
+
+        cls._telethon_storage_index = (cls._telethon_storage_index + 1) % len(cls.TELETHON_STORAGES)
+
+        return cls.TELETHON_STORAGES[cls._telethon_storage_index]
+
+    @classmethod
+    async def upload(cls, file: UploadFile) -> Optional[UploadedFile]:
+        uploader = cls(file)
+        upload_result = await uploader._upload()
+
+        if not upload_result:
+            return None
+
+        return await uploader._save_to_db()

fastapi_file_server/app/views.py

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+from fastapi import File, UploadFile
+from starlette import status
+from fastapi import APIRouter, HTTPException
+
+from app.serializers import UploadedFile
+from app import models
+from app.services.file_uploader import FileUploader
+
+
+router = APIRouter(
+    prefix="/api/v1",
+)
+
+
+@router.get("/files", response_model=list[UploadedFile])
+async def get_files():
+    return await models.UploadedFile.objects.all()
+
+
+@router.get("/files/{file_id}", response_model=UploadedFile, responses={
+    404: {},
+})
+async def get_file(file_id: int):
+    uploaded_file = await models.UploadedFile.objects.get_or_none(id=file_id)
+
+    if not uploaded_file:
+        raise HTTPException(status.HTTP_404_NOT_FOUND)
+
+    return uploaded_file
+
+
+@router.post("/files", response_model=UploadedFile)
+async def upload_file(file: UploadFile = File({})):
+    return await FileUploader.upload(file)
+
+
+@router.delete("/files/{file_id}", response_model=UploadedFile, responses={
+    400: {}
+})
+async def delete_file(file_id: int):
+    uploaded_file = await models.UploadedFile.objects.get_or_none(id=file_id)
+
+    if not uploaded_file:
+        raise HTTPException(status.HTTP_400_BAD_REQUEST)
+
+    await uploaded_file.delete()
+    return uploaded_file