single file download done

README.md

@@ -1,2 +1,43 @@
 # Richka - Python Async Download Engine
 
+#### Richka (From Ukrainian: Рiчка) means river, stands for the download speed of Richka Engine
+
+## Usage
+
+`import richka` and run script in your code, for example:
+
+```
+import richka
+
+import asyncio
+import time
+import threading
+
+# Create task controller
+controller = richka.Controller()
+
+def download():
+    global controller
+
+    # Create download task
+    time_used, file_size = asyncio.run(richka.download("https://mirrors.tuna.tsinghua.edu.cn/videolan-ftp/vlc-iOS/3.6.4/VLC-iOS.ipa", "VLC-iOS.ipa", controller))
+
+    # Result
+    print("Time used:", time_used)
+    print(f"Speed: {file_size / time_used / pow(1024, 2)}MiB/s")
+
+def main():
+    global controller
+
+    # Progress monitor
+    while controller.status:
+        if controller.status == 1:
+            print(f"Download Progress: {round(controller.progress, 2)}%         \r", end="")
+        time.sleep(0.1)
+
+if __name__ == "__main__":
+    threading.Thread(target=download).start()
+    main()
+
+```
+Then you'll get a file from Internet :D.

requirements.txt

@@ -0,0 +1 @@
+aiohttp~=3.8.5

richka/__init__.py

@@ -1,2 +1,3 @@
 from .config import *
-from .core import *
+from .core import *
+from .controller import *

richka/config.py

@@ -7,13 +7,16 @@
 HEADERS = {"user-agent": USER_AGENT}
 COROUTINE_LIMIT = 10
 SLICE_THRESHOLD = 10 # MiB
+TIMEOUT = 30
+RETRY_TIMES = 5
+CHUNK_SIZE = 102400
 
 logger = logging.getLogger("Richka Engine")
 
 def set_user_agent(user_agent: str) -> None:
     """
     Set Public User Agent for HTTP Requests
-    :param user_agent: String
+    :param user_agent: String User-Agent you want to set.
     :return:
     """
     richka.USER_AGENT = user_agent
@@ -22,7 +25,7 @@ def set_user_agent(user_agent: str) -> None:
 def set_headers(headers: dict) -> None:
     """
     Set Public Headers for HTTP Requests
-    :param headers: Dictionary
+    :param headers: Dictionary Headers you want to set.
     :return:
     """
     for key, value in headers.items():
@@ -31,15 +34,31 @@ def set_headers(headers: dict) -> None:
 def set_coroutine_limit(coroutine_limit: int) -> None:
     """
     Set Coroutine Limit for HTTP Requests
-    :param coroutine_limit: Integer
+    :param coroutine_limit: Integer Coroutine number limit.
     :return:
     """
     richka.COROUTINE_LIMIT = coroutine_limit
 
 def set_slice_threshold(slice_threshold: int) -> None:
     """
     Set Slice Threshold for HTTP Requests
-    :param slice_threshold: Integer
+    :param slice_threshold: Integer Slice threshold to enable coroutine download.
     :return:
     """
     richka.SLICE_THRESHOLD = slice_threshold
+
+def set_timeout(timeout: int) -> None:
+    """
+    Set Timeout for HTTP Requests
+    :param timeout: Integer Timeout time in seconds.
+    :return:
+    """
+    richka.TIMEOUT = timeout
+
+def set_retry_times(retry_times: int) -> None:
+    """
+    Set Retry Times for HTTP Requests
+    :param retry_times: Integer Allowed retry times.
+    :return:
+    """
+    richka.RETRY_TIMES = retry_times

richka/controller.py

@@ -0,0 +1,88 @@
+import asyncio
+
+class Controller:
+    def __init__(self):
+        self.__paused = False
+        self.__total_size = 0
+        self.__downloaded_size = 0
+        self.__downloaded_size_slice = {}
+        self.__lock = asyncio.Lock()  # For async safe
+
+    @property
+    def total_size(self) -> int:
+        """
+        Get the total size of the file.
+        :return: Integer Size of the file.
+        """
+        return self.__total_size
+
+    @total_size.setter
+    def total_size(self, size: int) -> None:
+        """
+        Set the total size of the file.
+        :param size: Integer Size of the file.
+        :return: None
+        """
+        if not self.__total_size:
+            self.__total_size = size
+
+    async def update_progress(self, downloaded_chunk_size: int, chunk_id: str = None) -> None:
+        """
+        Update the progress of the download. Do not operate this!
+        :param downloaded_chunk_size: Integer Downloaded Size of the file.
+        :param chunk_id: String Chunk ID of the part.
+        :return: None
+        """
+        async with self.__lock:
+            if chunk_id is None and self.__downloaded_size_slice == {}:
+                self.__downloaded_size = downloaded_chunk_size
+            else:
+                self.__downloaded_size_slice[chunk_id] = downloaded_chunk_size
+                self.__downloaded_size = sum(self.__downloaded_size_slice.values())
+
+    @property
+    def paused(self) -> bool:
+        """
+        Get the paused state of the downloader.
+        :return: Boolean State of the downloader.
+        """
+        return self.__paused
+
+    def pause(self) -> None:
+        """
+        Pause the downloader.
+        :return: None
+        """
+        self.__paused = True
+
+    def unpause(self) -> None:
+        """
+        Unpause the downloader.
+        :return: None
+        """
+        self.__paused = False
+
+    @property
+    def status(self) -> int:
+        """
+        Get the status of the downloader.
+        :return: Integer Status of the downloader. -1: Haven't Started -2: Paused 0: Done 1: Downloading
+        """
+        if self.__downloaded_size == 0:
+            return -1 # Haven't started
+        elif self.__paused:
+            return -2 # Paused
+        elif self.__downloaded_size / self.__total_size == 1:
+            return 0 # Done
+        else:
+            return 1 # Downloading
+
+    @property
+    def progress(self) -> float:
+        """
+        Get the progress of the downloader.
+        :return: Float Progress of the downloader.
+        """
+        if not self.__total_size:
+            return -1
+        return self.__downloaded_size / self.__total_size * 100

richka/core.py

@@ -1,56 +1,112 @@
 import time
 import asyncio
 
-import richka
-
 import aiohttp
 
-async def __download_range(session: aiohttp.ClientSession, url: str, start: int, end: int, destination: str) -> None:
+import richka
+from .controller import Controller
+
+async def __download_range(session: aiohttp.ClientSession, url: str, start: int, end: int, destination: str, controller: Controller = None) -> None:
     richka.logger.info(f'Downloading part {start}-{end} of {url} to {destination}.')
 
     headers = {**richka.HEADERS, **{'range': f'bytes={start}-{end}'}}
-
-    async with session.get(url, headers=headers) as response:
-        content = await response.read()
-        with open(destination, 'r+b') as f:
-            f.seek(start)
-            f.write(content)
-
-    richka.logger.info(f'Downloaded part {start}-{end} of {destination}.')
-
-async def __download_single(session: aiohttp.ClientSession, url: str, destination: str) -> None:
+    retry_times = richka.RETRY_TIMES
+
+    while retry_times > 0:
+        try:
+            async with session.get(url, headers=headers, timeout=aiohttp.ClientTimeout(sock_read=richka.TIMEOUT, sock_connect=richka.TIMEOUT)) as response:
+                with open(destination, 'r+b') as f:
+                    f.seek(start)
+                    # Read stream
+                    length = 0
+                    async for chunk in response.content.iter_chunked(richka.CHUNK_SIZE):
+                        while controller.paused:
+                            await asyncio.sleep(1)
+                        # noinspection PyTypeChecker
+                        f.write(chunk)
+                        # noinspection PyTypeChecker
+                        length += len(chunk)
+                        # Update tracker
+                        if controller is not None:
+                            await controller.update_progress(length, chunk_id=f"{start}-{end}")
+            break
+        except (aiohttp.ClientError, asyncio.TimeoutError):
+            retry_times -= 1
+            richka.logger.info(f'Download part {start}-{end} of {url} to {destination} failed for {richka.RETRY_TIMES - retry_times} times, retrying...')
+            await asyncio.sleep(1)
+
+    if retry_times > 0:
+        richka.logger.info(f'Downloaded part {start}-{end} of {url} to {destination}.')
+    else:
+        raise TimeoutError(f'Download part {start}-{end} of {url} to {destination} timed out.')
+
+async def __download_single(session: aiohttp.ClientSession, url: str, destination: str, controller: Controller = None) -> None:
     richka.logger.info(f'Downloading {url} to {destination}.')
 
-    async with session.get(url, headers=richka.HEADERS) as response:
-        content = await response.read()
-        with open(destination, 'r+b') as f:
-            f.write(content)
-
-    richka.logger.info(f'Downloaded {url} to {destination}.')
-
-async def download(url: str, destination: str) -> float:
+    retry_times = richka.RETRY_TIMES\
+
+    while retry_times > 0:
+        try:
+            async with session.get(url, headers=richka.HEADERS, timeout=aiohttp.ClientTimeout(sock_read=richka.TIMEOUT, sock_connect=richka.TIMEOUT)) as response:
+                with open(destination, 'r+b') as f:
+                    # Read stream
+                    length = 0
+                    async for chunk in response.content.iter_chunked(richka.CHUNK_SIZE):
+                        while controller.paused:
+                            await asyncio.sleep(1)
+                        # noinspection PyTypeChecker
+                        f.write(chunk)
+                        # noinspection PyTypeChecker
+                        length += len(chunk)
+                        # Update tracker
+                        if controller is not None:
+                            await controller.update_progress(length)
+            break
+        except (aiohttp.ClientError, asyncio.TimeoutError):
+            retry_times -= 1
+            richka.logger.info(f'Download {url} to {destination} failed for {richka.RETRY_TIMES - retry_times} times, retrying...')
+            await asyncio.sleep(1)
+
+    if retry_times > 0:
+        richka.logger.info(f'Downloaded {url} to {destination}.')
+    else:
+        raise TimeoutError(f'Download {url} to {destination} timed out.')
+
+async def download(url: str, destination: str, controller: Controller = None) -> tuple[float, int]:
+    """
+    Download a single file.
+    :param url: String Source URL.
+    :param destination: Destination Path.
+    :param controller: Download Controller.
+    :return: [Float, Integer] [Time Used, File Size]
+    """
     async with aiohttp.ClientSession() as session:
         # Get file size
         async with session.head(url) as response:
             file_size = int(response.headers.get('Content-Length', 0))
 
-        if not file_size or file_size / pow(1024, 2) <= 10:
+        if not file_size or file_size / pow(1024, 2) <= richka.SLICE_THRESHOLD:
             if not file_size:
                 richka.logger.info(f'Failed to get file size, directly downloading {url}.')
             else:
-                richka.logger.info(f"Downloading {url} ({file_size}) to {destination} with signle mode.")
+                richka.logger.info(f"Downloading {url} ({file_size}) to {destination} with single mode.")
+                if controller is not None:
+                    controller.total_size = file_size
 
             # Create an empty file
             with open(destination, 'wb') as f:
                 f.truncate(file_size)
 
             # Start task
             start_time = time.time()
-            await __download_single(session, url, destination)
+            await __download_single(session, url, destination, controller)
             end_time = time.time()
-            return end_time - start_time
+            richka.logger.info(f"Downloaded {url} ({file_size}) to {destination} with single mode.")
+            return end_time - start_time, file_size
 
         richka.logger.info(f'Downloading {url} ({file_size}) to {destination} with slicing mode.')
+        if controller is not None:
+           controller.total_size = file_size
 
         # Calc slice size
         part_size = file_size // richka.COROUTINE_LIMIT
@@ -64,11 +120,12 @@ async def download(url: str, destination: str) -> float:
         for i in range(richka.COROUTINE_LIMIT):
             start = i * part_size
             end = (start + part_size - 1) if i < richka.COROUTINE_LIMIT - 1 else (file_size - 1)
-            task = __download_range(session, url, start, end, destination)
+            task = __download_range(session, url, start, end, destination, controller)
             tasks.append(task)
 
         # Start all task
         start_time = time.time()
         await asyncio.gather(*tasks)
         end_time = time.time()
-        return end_time - start_time
+        richka.logger.info(f'Downloaded {url} ({file_size}) to {destination} with slicing mode.')
+        return end_time - start_time, file_size

setup.py

@@ -21,17 +21,22 @@
     version=about["__version__"],
     description=about["__description__"],
     packages=find_packages(),
+    install_requires=[
+        "aiohttp",
+    ],
     url=about["__url__"],
     license=about["__license__"],
     author=about["__author__"],
     author_email=about["__author_email__"],
     long_description_content_type="text/markdown",
     long_description=readme,
-    install_requires=[
-    ],
+    python_requires='>=3.9',
     classifiers=[
         'License :: OSI Approved :: MIT License',
         'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
+        'Programming Language :: Python :: 3.12',
         'Programming Language :: Python :: 3 :: Only',
     ],
     entry_points={