Open Guiferreira2000 opened 3 months ago
The plan to solve the bug involves addressing issues in both write.py
and msr605x.py
files. The primary issues identified are related to validation checks, command formatting, error handling, and feedback interpretation. By implementing the recommended changes, we can ensure that the data written to the MSR605X device is valid and that the device's responses are correctly interpreted.
The bug is likely caused by a combination of factors:
write.py
, the validation checks for track data are commented out, allowing potentially invalid data to be written to the device.msr605x.py
, the command structure for writing data to the device might not be correctly formatted, leading to the device not recognizing the command.write_track
method in msr605x.py
checks for a specific feedback pattern that might not cover all possible success responses from the device.write.py
Uncomment Validation Checks:
def write_tracks(msr, track1, track2, track3):
if not is_valid_track1(track1):
raise ValueError("Invalid data for Track 1. Must be alphanumeric.")
if not is_valid_track2(track2):
raise ValueError("Invalid data for Track 2. Must be numeric only.")
if not is_valid_track3(track3):
raise ValueError("Invalid data for Track 3. Must be numeric only.")
msr.write_track(1, track1)
msr.write_track(2, track2)
msr.write_track(3, track3)
Dynamic Input for Track Data:
def main():
msr = MSR605X()
msr.connect()
track1_data = input("Enter data for Track 1: ")
track2_data = input("Enter data for Track 2: ")
track3_data = input("Enter data for Track 3: ")
try:
write_tracks(msr, track1_data, track2_data, track3_data)
print("Data written successfully.")
except Exception as e:
print(f"Failed to write data: {e}")
msr605x.py
Enhance Connection Setup:
def connect(self):
""" Establish a connection to the MSR605X """
try:
dev = self.dev
if dev.is_kernel_driver_active(0):
dev.detach_kernel_driver(0)
dev.set_configuration()
config = dev.get_active_configuration()
interface = config.interfaces()[0]
self.hid_endpoint = interface.endpoints()[0]
except usb.core.USBError as e:
raise ConnectionError(f"Failed to connect to the device: {e}")
Improve Error Handling:
def recv_message(self, timeout=0):
""" Receive message from the MSR605X """
message = b""
while True:
packet = self._recv_packet(timeout=timeout)
if packet is None and not message:
return None
if packet is None:
raise TimeoutError("Timeout while waiting for device response.")
payload_length = packet[0] & SEQUENCE_LENGTH_BITS
payload = packet[1:1+payload_length]
message = message + payload
if packet[0] & SEQUENCE_END_BIT:
break
return message
Broaden Feedback Interpretation:
def write_track(self, track_number, data):
""" Write data to the specified track """
if not (1 <= track_number <= 3):
raise ValueError("Track number must be between 1 and 3")
if isinstance(data, str):
data = data.encode('utf-8')
command = (ESC + b'w' + ESC + b's' + ESC +
bytes(f"[0{track_number}]", 'utf-8') + # Specifying track number in the expected format
data + b'?' + ESC + b'\x1c')
self.send_message(command)
feedback = self.recv_message()
if feedback and (b'\x1b0' in feedback or b'\x1b1' in feedback): # Example of broader success response check
print(f"Successfully wrote to track {track_number}.")
else:
error_message = f"Failed to write data to track {track_number}. Device response: {feedback}"
raise Exception(error_message)
write.py
script.By implementing the recommended changes, the script will validate the input data, handle errors more gracefully, and correctly interpret the device's responses, thereby resolving the issue described in the ticket.
Click here to create a Pull Request with the proposed solution
Files used for this task:
Not Enable for the device MSR605x to write on the devices