Allow to specify a limit to concurrent transmissions

pyrogram/client.py

@@ -172,6 +172,11 @@ class Client(Methods):
             Pass True to hide the password when typing it during the login.
             Defaults to False, because ``getpass`` (the library used) is known to be problematic in some
             terminal environments.
+
+        max_concurrent_transmissions (``bool``, *optional*):
+            Set the maximum amount of concurrent transmissions (uploads & downloads).
+            A value that is too high may result in network related issues.
+            Defaults to 1.
     """
 
     APP_VERSION = f"Pyrogram {__version__}"
@@ -189,6 +194,8 @@ class Client(Methods):
     # Interval of seconds in which the updates watchdog will kick in
     UPDATES_WATCHDOG_INTERVAL = 5 * 60
 
+    MAX_CONCURRENT_TRANSMISSIONS = 1
+
     mimetypes = MimeTypes()
     mimetypes.readfp(StringIO(mime_types))
 
@@ -217,7 +224,8 @@ class Client(Methods):
         no_updates: bool = None,
         takeout: bool = None,
         sleep_threshold: int = Session.SLEEP_THRESHOLD,
-        hide_password: bool = False
+        hide_password: bool = False,
+        max_concurrent_transmissions: int = MAX_CONCURRENT_TRANSMISSIONS
     ):
         super().__init__()
 
@@ -245,6 +253,7 @@ class Client(Methods):
         self.takeout = takeout
         self.sleep_threshold = sleep_threshold
         self.hide_password = hide_password
+        self.max_concurrent_transmissions = max_concurrent_transmissions
 
         self.executor = ThreadPoolExecutor(self.workers, thread_name_prefix="Handler")
 
@@ -266,8 +275,8 @@ class Client(Methods):
         self.media_sessions = {}
         self.media_sessions_lock = asyncio.Lock()
 
-        self.save_file_lock = asyncio.Lock()
-        self.get_file_lock = asyncio.Lock()
+        self.save_file_semaphore = asyncio.Semaphore(self.max_concurrent_transmissions)
+        self.get_file_semaphore = asyncio.Semaphore(self.max_concurrent_transmissions)
 
         self.is_connected = None
         self.is_initialized = None
@@ -798,7 +807,7 @@ class Client(Methods):
         progress: Callable = None,
         progress_args: tuple = ()
     ) -> Optional[AsyncGenerator[bytes, None]]:
-        async with self.get_file_lock:
+        async with self.get_file_semaphore:
             file_type = file_id.file_type
 
             if file_type == FileType.CHAT_PHOTO:

pyrogram/methods/advanced/save_file.py

@@ -94,7 +94,7 @@ class SaveFile:
         Raises:
             RPCError: In case of a Telegram RPC error.
         """
-        async with self.save_file_lock:
+        async with self.save_file_semaphore:
             if path is None:
                 return None