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67 lines
2.2 KiB
Python
67 lines
2.2 KiB
Python
# Copyright 2024 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from __future__ import absolute_import
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import collections
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import struct
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from datetime import datetime
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class LogMessage(collections.namedtuple('LogMessage',
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'log_level task timestamp file_name line_number message')):
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__slots__ = ()
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response_struct = struct.Struct('<c16sccQH')
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def __str__(self):
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msec_timestamp = self.timestamp.strftime("%H:%M:%S.%f")[:-3]
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template = ('{self.log_level} {self.task} {msec_timestamp} '
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'{self.file_name}:{self.line_number}> {self.message}')
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return template.format(self=self, msec_timestamp=msec_timestamp)
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@classmethod
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def parse(cls, packet):
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result = cls.response_struct.unpack(packet[:cls.response_struct.size])
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msg = packet[cls.response_struct.size:]
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log_level = result[2]
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task = result[3]
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timestamp = datetime.fromtimestamp(result[4] / 1000.0)
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file_name = result[1].split('\x00', 1)[0] # NUL terminated
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line_number = result[5]
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return cls(log_level, task, timestamp, file_name, line_number, msg)
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class StreamingLogs(object):
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'''App for receiving log messages streamed by the firmware.
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'''
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PORT_NUMBER = 0x0003
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def __init__(self, interface):
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try:
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self.socket = interface.simplex_transport.open_socket(
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self.PORT_NUMBER)
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except AttributeError:
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raise TypeError('LoggingApp must be bound directly '
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'to an Interface, not a Link')
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def receive(self, block=True, timeout=None):
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return LogMessage.parse(self.socket.receive(block, timeout))
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def close(self):
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self.socket.close()
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