refactoring for new arch, added Redis, fixed filename, added video exists check

docker-compose.yml

@@ -0,0 +1,19 @@
+version: "2.1"
+services:
+  rabbitmq:
+    image: rabbitmq:3.10.7-management
+    hostname: rabbitmq
+    restart: always
+    environment:
+      - RABBITMQ_DEFAULT_USER=guest
+      - RABBITMQ_DEFAULT_PASS=guest
+    volumes:
+      - ./rabbitmq:/var/lib/rabbitmq
+    ports:
+      - 15672:15672
+      - 5672:5672
+  redis:
+    container_name: redis_video_downloader
+    image: redis:latest
+    ports:
+      - "6379:6379"

main.py

@@ -0,0 +1,8 @@
+from multiprocessing import freeze_support
+
+from src.core.master_service import MasterService
+
+if __name__ == '__main__':
+    freeze_support()
+    ms = MasterService()
+    ms.loop.run_until_complete(ms.run())

poetry.lock

@@ -61,6 +61,17 @@ doc = ["Sphinx", "packaging", "sphinx-autodoc-typehints (>=1.2.0)", "sphinx-rtd-
 test = ["anyio[trio]", "coverage[toml] (>=4.5)", "hypothesis (>=4.0)", "mock (>=4)", "psutil (>=5.9)", "pytest (>=7.0)", "pytest-mock (>=3.6.1)", "trustme", "uvloop (>=0.17)"]
 trio = ["trio (<0.22)"]
 
+[[package]]
+name = "async-timeout"
+version = "4.0.3"
+description = "Timeout context manager for asyncio programs"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "async-timeout-4.0.3.tar.gz", hash = "sha256:4640d96be84d82d02ed59ea2b7105a0f7b33abe8703703cd0ab0bf87c427522f"},
+    {file = "async_timeout-4.0.3-py3-none-any.whl", hash = "sha256:7405140ff1230c310e51dc27b3145b9092d659ce68ff733fb0cefe3ee42be028"},
+]
+
 [[package]]
 name = "click"
 version = "8.1.6"
@@ -463,6 +474,108 @@ files = [
 [package.extras]
 dev = ["atomicwrites (==1.2.1)", "attrs (==19.2.0)", "coverage (==6.5.0)", "hatch", "invoke (==1.7.3)", "more-itertools (==4.3.0)", "pbr (==4.3.0)", "pluggy (==1.0.0)", "py (==1.11.0)", "pytest (==7.2.0)", "pytest-cov (==4.0.0)", "pytest-timeout (==2.1.0)", "pyyaml (==5.1)"]
 
+[[package]]
+name = "redis"
+version = "5.0.0"
+description = "Python client for Redis database and key-value store"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "redis-5.0.0-py3-none-any.whl", hash = "sha256:06570d0b2d84d46c21defc550afbaada381af82f5b83e5b3777600e05d8e2ed0"},
+    {file = "redis-5.0.0.tar.gz", hash = "sha256:5cea6c0d335c9a7332a460ed8729ceabb4d0c489c7285b0a86dbbf8a017bd120"},
+]
+
+[package.dependencies]
+async-timeout = {version = ">=4.0.2", markers = "python_full_version <= \"3.11.2\""}
+
+[package.extras]
+hiredis = ["hiredis (>=1.0.0)"]
+ocsp = ["cryptography (>=36.0.1)", "pyopenssl (==20.0.1)", "requests (>=2.26.0)"]
+
+[[package]]
+name = "setproctitle"
+version = "1.3.2"
+description = "A Python module to customize the process title"
+optional = false
+python-versions = ">=3.7"
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+]
+
+[package.extras]
+test = ["pytest"]
+
 [[package]]
 name = "sniffio"
 version = "1.3.0"
@@ -625,4 +738,4 @@ resolved_reference = "86e3cf5e5849aefcc540c19bb5fa5ab7f470d1c1"
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.11"
-content-hash = "705938d942d3a13faa2f467967fa4f4ebd04d5ee0d58927ea2347360aa9e9981"
+content-hash = "efcb5800a420dd066a767d8a7a2765c047e58a76e3472b6cf11dd2e64abb6c8d"

pyproject.toml

@@ -14,6 +14,8 @@ jinja2 = "^3.1.2"
 python-multipart = "^0.0.6"
 pika = "^1.3.2"
 aio-pika = "^9.2.2"
+setproctitle = "^1.3.2"
+redis = "^5.0.0"
 
 
 [build-system]

src/core/async_queue.py

@@ -0,0 +1,12 @@
+import asyncio
+
+from src.core.redis_client import RedisClient
+
+redis = RedisClient()
+
+
+class AsyncQueue(asyncio.Queue):
+
+    async def put(self, item):
+        await redis.set_task_to_queue(item)
+        return await super().put(item)

src/core/master_service.py

@@ -1,85 +1,93 @@
 import asyncio
-import json
 import concurrent.futures as pool
-import multiprocessing
+import os.path
+import subprocess
+
 from functools import partial
-from multiprocessing import freeze_support
-from collections import deque
 
 from fastapi import HTTPException
-from aio_pika import connect
-from aio_pika.abc import AbstractIncomingMessage
 
-from src.core.send import body
+from src.core.async_queue import AsyncQueue
+from src.core.rabbitmq import get_messages
+from src.core.redis_client import RedisClient
+from src.core.result import Result, ResultTypeEnum
 from src.core.ydl import VideoDownloader
 from src.exceptions.download_exceptions import SiteNotImplementedException
 
 
-async def on_message(message: AbstractIncomingMessage, queue) -> None:
-    async with message.process():
-        # print(f" [x] Received message {message!r}")
-        await queue.put(json.loads(message.body))
-        print(f"     Message body is: {message.body!r}")
-
-
-async def get_messages(inner_queue) -> None:
-    # Perform connection
-    connection = await connect("amqp://guest:guest@localhost/")
-
-    async with connection:
-        # Creating a channel
-        channel = await connection.channel()
-        await channel.set_qos(prefetch_count=1)
-
-        # Declaring queue
-        queue = await channel.declare_queue(
-            "hello",
-            durable=True,
-        )
-
-        # Start listening the queue with name 'task_queue'
-        await queue.consume(partial(on_message, queue=inner_queue))
-
-        print(" [*] Waiting for messages. To exit press CTRL+C")
-        await asyncio.Future()
-
-
-def get_url_for_download_video(data: str):
-    file_name = VideoDownloader.get_unique_video_filename()
-    ydl_opts = {
-        "format": data["format"],
-        "merge_output_format": data["merge_output_format"],
-        'outtmpl': data["outtmpl"],
-    }
-    downloader = VideoDownloader(link=data["link"], ydl_opts=ydl_opts)
-    try:
-        result = downloader.download()
-    except SiteNotImplementedException as ex:
-        raise HTTPException(
-            status_code=400,
-            detail=ex.message
-        )
-
-
-async def create_workers(queue):
-    link = await queue.get()
-    get_url_for_download_video(link)
-
-
 class MasterService:
     def __init__(self):
+        self.loop = asyncio.get_event_loop()
         self.MAX_EXECUTOR_WORKERS = 8
-        self.executor = pool.ProcessPoolExecutor(max_workers=self.MAX_EXECUTOR_WORKERS)
-        self.queue = asyncio.Queue()
+        self.executor = pool.ProcessPoolExecutor(max_workers=self.MAX_EXECUTOR_WORKERS,
+                                                 initializer=executor_initializer)
+        self.queue = AsyncQueue()
         self.rabbit_consumer = get_messages
+        self.currently_underway = {}  # contains currently in progress videos
 
     async def run(self):
-        loop = asyncio.get_event_loop()
-        tasks = [loop.run_in_executor(self.executor, create_workers, self.queue) for i in range(self.MAX_EXECUTOR_WORKERS)]
+        subprocess.run(
+            "for pid in $(ps -ef | grep video_downloader_executor_process | awk '{print $2}'); do kill -9 $pid; done",
+            shell=True, capture_output=True
+        )
+
+        tasks = [self.loop.create_task(self.create_workers()) for i in range(self.MAX_EXECUTOR_WORKERS + 1)]
+
         await asyncio.gather(self.rabbit_consumer(self.queue), *tasks)
 
+    async def create_workers(self):
+        while True:
+            video_params = await self.queue.get()
+            redis = RedisClient()
+            await redis.del_task_from_queue_and_add_to_tasks(task=video_params)
+            self.currently_underway[video_params['link']] = video_params
+            download_task = self.loop.run_in_executor(self.executor, partial(
+                MasterService.video_processing_executor, video_params=video_params
+                )
+            )
+
+            result = await download_task
+            await redis.del_task_from_tasks_and_add_to_task_done(task=video_params)
+            # TODO process result
+            self.queue.task_done()
+
+    @staticmethod
+    def video_download(video_params: dict):
+        ydl_opts = {
+            "format": video_params["format"],
+            "merge_output_format": video_params["merge_output_format"],
+            'outtmpl': video_params["outtmpl"],
+            "quiet": True
+        }
+        downloader = VideoDownloader(link=video_params["link"], ydl_opts=ydl_opts)
+        video_info = downloader.get_info()
+        if os.path.exists(
+                os.path.join(os.getcwd() + f"Youtube/{video_info['id']}_{video_info['width']}.{video_info['ext']}")
+        ):
+            return Result(result_type=ResultTypeEnum.EXIST)
+        try:
+            downloader.ydl_opts["quiet"] = False
+            result = downloader.download()
+            return result
+        except SiteNotImplementedException as ex:
+            raise HTTPException(
+                status_code=400,
+                detail=ex.message
+            )
+
+    @staticmethod
+    def video_processing_executor(video_params: dict):
+        try:
+            MasterService.video_download(video_params=video_params)
+            return Result(result_type=ResultTypeEnum.DONE)
+        except Exception as ex:
+            return Result(result_type=ResultTypeEnum.EXCEPTION, value=ex)
+        # TODO upload to server
+
+
+def executor_initializer():
+    import setproctitle
+    setproctitle.setproctitle(f'video_downloader_executor_process')
+    return True
+
 
-if __name__ == '__main__':
-    freeze_support()
-    ms = MasterService()
-    asyncio.run(ms.run())

src/core/rabbitmq.py

@@ -0,0 +1,28 @@
+import asyncio
+import json
+from functools import partial
+
+from aio_pika import connect
+from aio_pika.abc import AbstractIncomingMessage
+
+
+async def on_message(message: AbstractIncomingMessage, queue) -> None:
+    async with message.process():
+        await queue.put(json.loads(message.body))
+        print(f"     Message body is: {message.body!r}")
+
+
+async def get_messages(inner_queue) -> None:
+    async with await connect("amqp://guest:guest@localhost/") as connection:
+        channel = await connection.channel()
+        await channel.set_qos(prefetch_count=1)
+
+        queue = await channel.declare_queue(
+            "hello",
+            durable=True,
+        )
+
+        await queue.consume(partial(on_message, queue=inner_queue))
+
+        print(" [*] Waiting for messages. To exit press CTRL+C")
+        await asyncio.Future()

src/core/redis_client.py

@@ -0,0 +1,55 @@
+import json
+
+import redis.asyncio as redis
+
+
+class RedisClient:
+    SET_NAME = "queue"
+    TASKS_NAME = "tasks_working"
+    TASKS_DONE_NAME = "tasks_done"
+
+    def __init__(self):
+        self.connection = redis.Redis(host="localhost", port=6379, db=0)
+
+    async def _set_task(self, task: dict) -> int:
+        async with self.connection as connection:
+            res = await connection.set(f'{self.TASKS_NAME}:{task["link"]}', json.dumps(task, indent=4).encode('utf-8'))
+        return res
+
+    async def _set_task_done(self, task: dict) -> int:
+        async with self.connection as connection:
+            res = await connection.set(
+                f'{self.TASKS_DONE_NAME}:1:{task["link"]}',
+                json.dumps(task, indent=4).encode('utf-8')
+                                       )
+        return res
+
+    async def _del_task(self, task: dict) -> int:
+        async with self.connection as connection:
+            res = await connection.delete(f'{self.TASKS_NAME}:{task["link"]}')
+        return res
+
+    async def set_task_to_queue(self, task: dict) -> int:
+        async with self.connection as connection:
+            res = await connection.sadd(self.SET_NAME, json.dumps(task, indent=4).encode('utf-8'))
+        return res
+
+    async def get_queue(self) -> set:
+        async with self.connection as connection:
+            res = await connection.smembers(self.SET_NAME)
+        return res
+
+    async def del_task_from_queue(self, task: dict) -> int:
+        async with self.connection as connection:
+            res = await connection.srem(self.SET_NAME, json.dumps(task, indent=4).encode('utf-8'))
+        return res
+
+    async def del_task_from_queue_and_add_to_tasks(self, task: dict) -> int:
+
+        await self.del_task_from_queue(task)
+        return await self._set_task(task)
+
+    async def del_task_from_tasks_and_add_to_task_done(self, task: dict) -> int:
+        await self._del_task(task)
+        return await self._set_task_done(task)
+

src/core/result.py

@@ -0,0 +1,16 @@
+from enum import Enum
+
+
+class ResultTypeEnum(Enum):
+    EXCEPTION = "Error"
+    DONE = "Done"
+    EXIST = "Exist"
+
+
+class Result:
+    def __init__(self, result_type: ResultTypeEnum, value: Exception | bool = None):
+        self.result_type = result_type
+        self.value = value
+
+    def __repr__(self):
+        return f'Result: {self.result_type.value}. Traceback: {self.value if self.value else None}'

src/core/ydl.py

@@ -24,12 +24,9 @@ class VideoDownloader:
         self.username = username
         self.password = password
 
-    @staticmethod
-    def get_unique_video_filename():
-        prefix = f'vid_{datetime.now().strftime("%Y%m%d%H%M%S")}'
-        random_uuid4 = uuid.uuid4().hex[:8]
-        filename = f"{prefix}_{random_uuid4}"
-        return filename
+    def get_info(self):
+        with youtube_dl.YoutubeDL(self.ydl_opts if self.ydl_opts else {}) as ydl:
+            return ydl.extract_info(self.link, download=False)
 
     def download(self):
         domain = urlparse(self.link).netloc