Updated the timeout wrapper for read/write operations

libp2p/protocol_muxer/multiselect.py

@@ -59,41 +59,44 @@ class Multiselect(IMultiselectMuxer):
         :return: selected protocol name, handler function
         :raise MultiselectError: raised when negotiation failed
         """
-        await self.handshake(communicator)
+        try:
+            with trio.fail_after(DEFAULT_NEGOTIATE_TIMEOUT):
+                await self.handshake(communicator)
 
-        while True:
+                while True:
-            try:
-                with trio.fail_after(DEFAULT_NEGOTIATE_TIMEOUT):
-                    command = await communicator.read()
-            except trio.TooSlowError:
-                raise MultiselectError("handshake read timeout")
-            except MultiselectCommunicatorError as error:
-                raise MultiselectError() from error
-
-            if command == "ls":
-                supported_protocols = [p for p in self.handlers.keys() if p is not None]
-                response = "\n".join(supported_protocols) + "\n"
-
-                try:
-                    await communicator.write(response)
-                except MultiselectCommunicatorError as error:
-                    raise MultiselectError() from error
-
-            else:
-                protocol = TProtocol(command)
-                if protocol in self.handlers:
                     try:
-                        await communicator.write(protocol)
+                        command = await communicator.read()
                     except MultiselectCommunicatorError as error:
                         raise MultiselectError() from error
 
-                    return protocol, self.handlers[protocol]
+                    if command == "ls":
-                try:
+                        supported_protocols = [
-                    await communicator.write(PROTOCOL_NOT_FOUND_MSG)
+                            p for p in self.handlers.keys() if p is not None
-                except MultiselectCommunicatorError as error:
+                        ]
-                    raise MultiselectError() from error
+                        response = "\n".join(supported_protocols) + "\n"
 
-        raise MultiselectError("Negotiation failed: no matching protocol")
+                        try:
+                            await communicator.write(response)
+                        except MultiselectCommunicatorError as error:
+                            raise MultiselectError() from error
+
+                    else:
+                        protocol = TProtocol(command)
+                        if protocol in self.handlers:
+                            try:
+                                await communicator.write(protocol)
+                            except MultiselectCommunicatorError as error:
+                                raise MultiselectError() from error
+
+                            return protocol, self.handlers[protocol]
+                        try:
+                            await communicator.write(PROTOCOL_NOT_FOUND_MSG)
+                        except MultiselectCommunicatorError as error:
+                            raise MultiselectError() from error
+
+                raise MultiselectError("Negotiation failed: no matching protocol")
+        except trio.TooSlowError:
+            raise MultiselectError("handshake read timeout")
 
     async def handshake(self, communicator: IMultiselectCommunicator) -> None:
         """
@@ -108,10 +111,7 @@ class Multiselect(IMultiselectMuxer):
             raise MultiselectError() from error
 
         try:
-            with trio.fail_after(DEFAULT_NEGOTIATE_TIMEOUT):  # Timeout after 5 seconds
+            handshake_contents = await communicator.read()
-                handshake_contents = await communicator.read()
-        except trio.TooSlowError:
-            raise MultiselectError("protocol selection response timed out")
         except MultiselectCommunicatorError as error:
             raise MultiselectError() from error
 

libp2p/protocol_muxer/multiselect_client.py

@@ -42,10 +42,8 @@ class MultiselectClient(IMultiselectClient):
             raise MultiselectClientError() from error
 
         try:
-            with trio.fail_after(DEFAULT_NEGOTIATE_TIMEOUT):
+            handshake_contents = await communicator.read()
-                handshake_contents = await communicator.read()
+
-        except trio.TooSlowError:
-            raise MultiselectClientError("handshake read timed out")
         except MultiselectCommunicatorError as error:
             raise MultiselectClientError() from error
 
@@ -65,16 +63,22 @@ class MultiselectClient(IMultiselectClient):
         :return: selected protocol
         :raise MultiselectClientError: raised when protocol negotiation failed
         """
-        await self.handshake(communicator)
+        try:
+            with trio.fail_after(DEFAULT_NEGOTIATE_TIMEOUT):
+                await self.handshake(communicator)
 
-        for protocol in protocols:
+                for protocol in protocols:
-            try:
+                    try:
-                selected_protocol = await self.try_select(communicator, protocol)
+                        selected_protocol = await self.try_select(
-                return selected_protocol
+                            communicator, protocol
-            except MultiselectClientError:
+                        )
-                pass
+                        return selected_protocol
+                    except MultiselectClientError:
+                        pass
 
-        raise MultiselectClientError("protocols not supported")
+                raise MultiselectClientError("protocols not supported")
+        except trio.TooSlowError:
+            raise MultiselectClientError("response timed out")
 
     async def query_multistream_command(
         self, communicator: IMultiselectCommunicator, command: str
@@ -88,26 +92,28 @@ class MultiselectClient(IMultiselectClient):
         :raise MultiselectClientError: If the communicator fails to process data.
         :return: list of strings representing the response from peer.
         """
-        await self.handshake(communicator)
-
-        if command == "ls":
-            try:
-                await communicator.write("ls")
-            except MultiselectCommunicatorError as error:
-                raise MultiselectClientError() from error
-        else:
-            raise ValueError("Command not supported")
-
         try:
-            with trio.fail_after(DEFAULT_NEGOTIATE_TIMEOUT):  # Timeout after 5 seconds
+            with trio.fail_after(DEFAULT_NEGOTIATE_TIMEOUT):
-                response = await communicator.read()
+                await self.handshake(communicator)
-            response_list = response.strip().splitlines()
+
+                if command == "ls":
+                    try:
+                        await communicator.write("ls")
+                    except MultiselectCommunicatorError as error:
+                        raise MultiselectClientError() from error
+                else:
+                    raise ValueError("Command not supported")
+
+                try:
+                    response = await communicator.read()
+                    response_list = response.strip().splitlines()
+
+                except MultiselectCommunicatorError as error:
+                    raise MultiselectClientError() from error
+
+                return response_list
         except trio.TooSlowError:
             raise MultiselectClientError("command response timed out")
-        except MultiselectCommunicatorError as error:
-            raise MultiselectClientError() from error
-
-        return response_list
 
     async def try_select(
         self, communicator: IMultiselectCommunicator, protocol: TProtocol
@@ -126,10 +132,8 @@ class MultiselectClient(IMultiselectClient):
             raise MultiselectClientError() from error
 
         try:
-            with trio.fail_after(DEFAULT_NEGOTIATE_TIMEOUT):  # Timeout after 5 seconds
+            response = await communicator.read()
-                response = await communicator.read()
+
-        except trio.TooSlowError:
-            raise MultiselectClientError("protocol selection response timed out")
         except MultiselectCommunicatorError as error:
             raise MultiselectClientError() from error