def we_split_function(self, raw_data):
"""
Sort through the raw data to identify new blocks of data that need processing.
This is needed instead of a regex because blocks are identified by position
in this binary file.
"""
form_list = []
raw_data_len = len(raw_data)
"""
Ok, there is a new issue with parsing these records. The Status messages
can have an optional 2 bytes on the end, and since the rest of the data
is relatively unformated packed binary records, detecting the presence of
that optional 2 bytes can be difficult. The only pattern we have to detect
is the STATUS_START field ( 4 bytes FF FF FF F[A-F] ). So, we peel this
appart be parsing backwards, using the end-of-record as an additional anchor
point.
"""
# '-1' to remove the '\x03' end-of-record marker
parse_end_point = raw_data_len - 1
while parse_end_point > 0:
# look for a status message at postulated message header position
header_start = STATUS_BYTES_AUGMENTED
# look for an augmented status
if STATUS_START_MATCHER.match(raw_data[parse_end_point-STATUS_BYTES_AUGMENTED:parse_end_point]):
# A hit for the status message at the augmented offset
# NOTE, we don't need the status messages, so we drop them on the floor here
# and only deliver a stream of samples to build_parse_values
parse_end_point = parse_end_point-STATUS_BYTES_AUGMENTED
# check if this is a unaugmented status
elif STATUS_START_MATCHER.match(raw_data[parse_end_point-STATUS_BYTES:parse_end_point]):
# A hit for the status message at the unaugmented offset
# NOTE: same as above
parse_end_point = parse_end_point-STATUS_BYTES
else:
# assume if not a stat that hit above, we have a sample. If we missparse, we
# will end up with extra bytes when we finish, and sample_except at that point.
form_list.append((parse_end_point-E_GLOBAL_SAMPLE_BYTES, parse_end_point))
parse_end_point = parse_end_point-E_GLOBAL_SAMPLE_BYTES
# if the remaining bytes are less than the data sample bytes, all we might have left is a status sample, if we don't we're done
if parse_end_point != 0 and parse_end_point < STATUS_BYTES and parse_end_point < E_GLOBAL_SAMPLE_BYTES and parse_end_point < STATUS_BYTES_AUGMENTED:
self._exception_callback(UnexpectedDataException("Error sieving WE data, inferred sample/status alignment incorrect"))
return_list = []
return return_list
# since we parsed this backwards, we need to reverse to list to deliver the data in the correct order
return_list = form_list[::-1]
log.debug("returning we sieve list %s", return_list)
return return_list
def sieve_function(self, raw_data):
"""
This method sorts through the raw data to identify new blocks of data that need
processing. This is needed instead of a regex because blocks are identified by
position in this binary file.
"""
form_list = []
raw_data_len = len(raw_data)
# Starting from the end of the buffer and working backwards
parse_end_point = raw_data_len
# We are going to go through the file data in reverse order since we have a
# variable length status indicator field.
# While we do not hit the beginning of the file contents, continue
while parse_end_point > 0:
# Create the different start indices for the three different scenarios
raw_data_start_index_augmented = parse_end_point - STATUS_BYTES_AUGMENTED
raw_data_start_index_normal = parse_end_point - STATUS_BYTES
global_recovered_eng_rec_index = parse_end_point - WFP_E_GLOBAL_RECOVERED_ENG_DATA_SAMPLE_BYTES
# Check for an an augmented status first
if raw_data_start_index_augmented >= 0 and \
STATUS_START_MATCHER.match(raw_data[raw_data_start_index_augmented:parse_end_point]):
log.trace("Found OffloadProfileData with decimation factor")
parse_end_point = raw_data_start_index_augmented
# Check for a normal status
elif raw_data_start_index_normal >= 0 and \
STATUS_START_MATCHER.match(raw_data[raw_data_start_index_normal:parse_end_point]):
log.trace("Found OffloadProfileData without decimation factor")
parse_end_point = raw_data_start_index_normal
# If neither, we are dealing with a global wfp_sio e recovered engineering data record,
# so we will save the start and end points
elif global_recovered_eng_rec_index >= 0:
log.trace("Found OffloadEngineeringData")
form_list.append(
(global_recovered_eng_rec_index, parse_end_point))
parse_end_point = global_recovered_eng_rec_index
# We must not have a good file, log some debug info for now
else:
log.debug("raw_data_start_index_augmented %d",
raw_data_start_index_augmented)
log.debug("raw_data_start_index_normal %d",
raw_data_start_index_normal)
log.debug("global_recovered_eng_rec_index %d",
global_recovered_eng_rec_index)
log.debug("bad file or bad position?")
raise SampleException(
"File size is invalid or improper positioning")
return_list = form_list[::-1]
return return_list
def we_split_function(self, raw_data):
"""
Sort through the raw data to identify new blocks of data that need processing.
"""
form_list = []
"""
The Status messages can have an optional 2 bytes on the end, and since the
rest of the data consists of relatively unformated packed binary records,
detecting the presence of that optional 2 bytes can be difficult. The only
pattern we have to detect is the STATUS_START field ( 4 bytes FF FF FF F[A-F]).
We peel this appart by parsing backwards, using the end-of-record as an
additional anchor point.
"""
parse_end_point = len(raw_data)
while parse_end_point > 0:
# look for a status message at postulated message header position
header_start = STATUS_BYTES_AUGMENTED
# look for an augmented status
if STATUS_START_MATCHER.match(
raw_data[parse_end_point -
STATUS_BYTES_AUGMENTED:parse_end_point]):
# A hit for the status message at the augmented offset
# NOTE, we don't need the status messages and only deliver a stream of
# samples to build_parsed_values
parse_end_point = parse_end_point - STATUS_BYTES_AUGMENTED
# check if this is an unaugmented status
elif STATUS_START_MATCHER.match(
raw_data[parse_end_point - STATUS_BYTES:parse_end_point]):
# A hit for the status message at the unaugmented offset
# NOTE: same as above
parse_end_point = parse_end_point - STATUS_BYTES
else:
# assume if not a stat that hit above, we have a sample. Mis-parsing will result
# in extra bytes at the end and a sample exception.
form_list.append(
(parse_end_point - E_GLOBAL_SAMPLE_BYTES, parse_end_point))
parse_end_point = parse_end_point - E_GLOBAL_SAMPLE_BYTES
# if the remaining bytes are less than data sample bytes, all we might have left is a status sample
if parse_end_point != 0 and parse_end_point < STATUS_BYTES \
and parse_end_point < E_GLOBAL_SAMPLE_BYTES \
and parse_end_point < STATUS_BYTES_AUGMENTED:
self._exception_callback(
UnexpectedDataException(
"Error sieving WE data, inferred sample/status alignment incorrect"
))
return_list = []
return return_list
# Because we parsed this backwards, we need to reverse the list to deliver the data in the correct order
return_list = form_list[::-1]
log.debug("returning we sieve/split list %s", return_list)
return return_list
def we_split_function(self, raw_data):
"""
Sort through the raw data to identify new blocks of data that need processing.
"""
form_list = []
"""
The Status messages can have an optional 2 bytes on the end, and since the
rest of the data consists of relatively unformated packed binary records,
detecting the presence of that optional 2 bytes can be difficult. The only
pattern we have to detect is the STATUS_START field ( 4 bytes FF FF FF F[A-F]).
We peel this appart by parsing backwards, using the end-of-record as an
additional anchor point.
"""
parse_end_point = len(raw_data)
while parse_end_point > 0:
# look for a status message at postulated message header position
header_start = STATUS_BYTES_AUGMENTED
# look for an augmented status
if STATUS_START_MATCHER.match(raw_data[parse_end_point - STATUS_BYTES_AUGMENTED : parse_end_point]):
# A hit for the status message at the augmented offset
# NOTE, we don't need the status messages and only deliver a stream of
# samples to build_parsed_values
parse_end_point = parse_end_point - STATUS_BYTES_AUGMENTED
# check if this is an unaugmented status
elif STATUS_START_MATCHER.match(raw_data[parse_end_point - STATUS_BYTES : parse_end_point]):
# A hit for the status message at the unaugmented offset
# NOTE: same as above
parse_end_point = parse_end_point - STATUS_BYTES
else:
# assume if not a stat that hit above, we have a sample. Mis-parsing will result
# in extra bytes at the end and a sample exception.
form_list.append((parse_end_point - E_GLOBAL_SAMPLE_BYTES, parse_end_point))
parse_end_point = parse_end_point - E_GLOBAL_SAMPLE_BYTES
# if the remaining bytes are less than data sample bytes, all we might have left is a status sample
if (
parse_end_point != 0
and parse_end_point < STATUS_BYTES
and parse_end_point < E_GLOBAL_SAMPLE_BYTES
and parse_end_point < STATUS_BYTES_AUGMENTED
):
self._exception_callback(
UnexpectedDataException("Error sieving WE data, inferred sample/status alignment incorrect")
)
return_list = []
return return_list
# Because we parsed this backwards, we need to reverse the list to deliver the data in the correct order
return_list = form_list[::-1]
log.debug("returning we sieve/split list %s", return_list)
return return_list
def sieve_function(self, raw_data):
"""
This method sorts through the raw data to identify new blocks of data that need
processing. This is needed instead of a regex because blocks are identified by
position in this binary file.
"""
form_list = []
raw_data_len = len(raw_data)
# Starting from the end of the buffer and working backwards
parse_end_point = raw_data_len
# We are going to go through the file data in reverse order since we have a
# variable length status indicator field.
# While we do not hit the beginning of the file contents, continue
while parse_end_point > 0:
# Create the different start indices for the three different scenarios
raw_data_start_index_augmented = parse_end_point-STATUS_BYTES_AUGMENTED
raw_data_start_index_normal = parse_end_point-STATUS_BYTES
global_recovered_eng_rec_index = parse_end_point-WFP_E_GLOBAL_RECOVERED_ENG_DATA_SAMPLE_BYTES
# Check for an an augmented status first
if raw_data_start_index_augmented >= 0 and \
STATUS_START_MATCHER.match(raw_data[raw_data_start_index_augmented:parse_end_point]):
log.trace("Found OffloadProfileData with decimation factor")
parse_end_point = raw_data_start_index_augmented
# Check for a normal status
elif raw_data_start_index_normal >= 0 and \
STATUS_START_MATCHER.match(raw_data[raw_data_start_index_normal:parse_end_point]):
log.trace("Found OffloadProfileData without decimation factor")
parse_end_point = raw_data_start_index_normal
# If neither, we are dealing with a global wfp_sio e recovered engineering data record,
# so we will save the start and end points
elif global_recovered_eng_rec_index >= 0:
log.trace("Found OffloadEngineeringData")
form_list.append((global_recovered_eng_rec_index, parse_end_point))
parse_end_point = global_recovered_eng_rec_index
# We must not have a good file, log some debug info for now
else:
log.debug("raw_data_start_index_augmented %d", raw_data_start_index_augmented)
log.debug("raw_data_start_index_normal %d", raw_data_start_index_normal)
log.debug("global_recovered_eng_rec_index %d", global_recovered_eng_rec_index)
log.debug("bad file or bad position?")
raise SampleException("File size is invalid or improper positioning")
return_list = form_list[::-1]
return return_list
def parse_chunks(self):
"""
Parse out any pending data chunks in the chunker. If
it is a valid data piece, build a particle, update the position and
timestamp. Go until the chunker has no more valid data.
@retval a list of tuples with sample particles encountered in this
parsing, plus the state. An empty list of nothing was parsed.
"""
result_particles = []
(timestamp, chunk) = self._chunker.get_next_data()
while (chunk != None):
# Parse/match the SIO header
sio_header_match = SIO_HEADER_MATCHER.match(chunk)
end_of_header = sio_header_match.end(0)
sample_count = 0
if sio_header_match.group(1) == 'WE':
log.trace('read_state: %s', self._read_state)
# Parse/match the E file header
e_header_match = E_HEADER_MATCHER.search(chunk[end_of_header:end_of_header+HEADER_BYTES])
if e_header_match:
payload = chunk[end_of_header+HEADER_BYTES:-1] # '-1' to remove the '\x03' end-of-record marker
data_split = self.we_split_function(payload)
if data_split:
for ii in range(0,len(data_split)):
e_record = payload[data_split[ii][0]:data_split[ii][1]]
if not STATUS_START_MATCHER.match(e_record[0:STATUS_BYTES]):
fields = struct.unpack('>I', e_record[0:4])
self._timestamp = ntplib.system_to_ntp_time(float(fields[0]))
if len(e_record) == E_GLOBAL_SAMPLE_BYTES:
sample = self._extract_sample(FlordLWfpParserDataParticle,
None,
e_record,
self._timestamp)
if sample:
# create particle
result_particles.append(sample)
sample_count += 1
else:
self._exception_callback(UnexpectedDataException("Found unexpected data."))
else: # no e header match
self._exception_callback(UnexpectedDataException("Found unexpected data."))
self._chunk_sample_count.append(sample_count)
(timestamp, chunk) = self._chunker.get_next_data()
return result_particles
def _process_we_record(self, payload):
indices_list = self.we_split_function(payload)
for indices in indices_list:
e_record = payload[indices[0] : indices[1]]
if not STATUS_START_MATCHER.match(e_record[0:STATUS_BYTES]):
fields = struct.unpack(">I", e_record[0:4])
self._timestamp = ntplib.system_to_ntp_time(float(fields[0]))
sample = self._extract_sample(FlordLWfpSioDataParticle, None, e_record, self._timestamp)
if sample:
# create particle
self._result_particles.append(sample)
def _process_we_record(self, payload):
indices_list = self.we_split_function(payload)
for indices in indices_list:
e_record = payload[indices[0]:indices[1]]
if not STATUS_START_MATCHER.match(e_record[0:STATUS_BYTES]):
fields = struct.unpack('>I', e_record[0:4])
self._timestamp = ntplib.system_to_ntp_time(float(fields[0]))
sample = self._extract_sample(FlordLWfpSioDataParticle, None,
e_record, self._timestamp)
if sample:
# create particle
self._result_particles.append(sample)
def parse_chunks(self):
"""
Parse out any pending data chunks in the chunker. If
it is a valid data piece, build a particle, update the position and
timestamp. Go until the chunker has no more valid data.
@retval a list of tuples with sample particles encountered in this
parsing, plus the state. An empty list if nothing was parsed.
"""
result_particles = []
(timestamp, chunk) = self._chunker.get_next_data()
while (chunk != None):
sio_header_match = SIO_HEADER_MATCHER.match(chunk)
sample_count = 0
log.debug('parsing header %s', sio_header_match.group(0)[1:SIO_HEADER_BYTES])
if sio_header_match.group(1) == 'WE':
log.trace("********************************matched chunk header %s", chunk[0:SIO_HEADER_BYTES])
# Parse/match the E file header
e_header_match = WFP_E_GLOBAL_FLAGS_HEADER_MATCHER.search(chunk[SIO_HEADER_BYTES:SIO_HEADER_BYTES+HEADER_BYTES+1])
if e_header_match:
log.debug('******************************* HEADER MATCH WAS:')
log.debug('%s', ":".join("{:02x}".format(ord(c)) for c in chunk[SIO_HEADER_BYTES:SIO_HEADER_BYTES+HEADER_BYTES+1]))
payload = chunk[SIO_HEADER_BYTES+HEADER_BYTES+1:]
data_split = self.we_split_function(payload)
if data_split:
log.debug('Found data match in chunk %s', chunk[1:SIO_HEADER_BYTES])
for ii in range(0,len(data_split)):
e_record = payload[data_split[ii][0]:data_split[ii][1]]
# particle-ize the data block received, return the record
if not STATUS_START_MATCHER.match(e_record[0:STATUS_BYTES]):
fields = struct.unpack('>I', e_record[0:4])
timestampS = float(fields[0])
timestamp = ntplib.system_to_ntp_time(timestampS)
if len(e_record) == E_GLOBAL_SAMPLE_BYTES:
sample = self._extract_sample(DostaLnWfpSioMuleParserDataParticle,
None,
e_record,
timestamp)
if sample:
# create particle
result_particles.append(sample)
sample_count += 1
else: # no e header match
log.warn("*****************************************************BAD E HEADER 0x%s",
":".join("{:02x}".format(ord(c)) for c in chunk))
self._exception_callback(UnexpectedDataException("Found unexpected data."))
self._chunk_sample_count.append(sample_count)
(timestamp, chunk, start, end) = self._chunker.get_next_data_with_index()
return result_particles
def parse_chunks(self):
"""
Parse out any pending data chunks in the chunker. If
it is a valid data piece, build a particle, update the position and
timestamp. Go until the chunker has no more valid data.
@retval a list of tuples with sample particles encountered in this
parsing, plus the state. An empty list of nothing was parsed.
"""
result_particles = []
(timestamp, chunk) = self._chunker.get_next_data()
while (chunk != None):
# Parse/match the SIO header
sio_header_match = SIO_HEADER_MATCHER.match(chunk)
end_of_header = sio_header_match.end(0)
sample_count = 0
if sio_header_match.group(1) == 'WE':
log.trace('read_state: %s', self._read_state)
# Parse/match the E file header
e_header_match = E_HEADER_MATCHER.search(
chunk[end_of_header:end_of_header + HEADER_BYTES])
if e_header_match:
payload = chunk[
end_of_header + HEADER_BYTES:
-1] # '-1' to remove the '\x03' end-of-record marker
data_split = self.we_split_function(payload)
if data_split:
for ii in range(0, len(data_split)):
e_record = payload[
data_split[ii][0]:data_split[ii][1]]
if not STATUS_START_MATCHER.match(
e_record[0:STATUS_BYTES]):
fields = struct.unpack('>I', e_record[0:4])
self._timestamp = ntplib.system_to_ntp_time(
float(fields[0]))
if len(e_record) == E_GLOBAL_SAMPLE_BYTES:
sample = self._extract_sample(
FlordLWfpSioMuleParserDataParticle,
None, e_record, self._timestamp)
if sample:
# create particle
result_particles.append(sample)
sample_count += 1
else:
self._exception_callback(
UnexpectedDataException(
"Found unexpected data."))
else: # no e header match
self._exception_callback(
UnexpectedDataException("Found unexpected data."))
self._chunk_sample_count.append(sample_count)
(timestamp, chunk) = self._chunker.get_next_data()
return result_particles
def _process_engineering_data(self, profile_eng_data):
"""
This method processes profile engineering data attempting to create
the following particle types along the way:
WfpEngWfpSioParserDataStatusParticle
WfpEngWfpSioParserDataEngineeringParticle
"""
# Start from the end of the chunk and working backwards
parse_end_point = len(profile_eng_data)
# We are going to go through the file data in reverse order since we have a
# variable length sample record that could have a decimation factor.
# While we do not hit the beginning of the file contents, continue
while parse_end_point > 0:
# Create the different start indices for the three different scenarios
start_index_augmented = parse_end_point-STATUS_BYTES_AUGMENTED
start_index_normal = parse_end_point-STATUS_BYTES
global_recovered_eng_rec_index = parse_end_point-WFP_E_GLOBAL_RECOVERED_ENG_DATA_SAMPLE_BYTES
# Check for an an augmented status first
if start_index_augmented >= 0 and \
STATUS_START_MATCHER.match(profile_eng_data[start_index_augmented:parse_end_point]):
log.trace("Found OffloadProfileData with decimation factor")
fields_prof = struct.unpack_from('>I', profile_eng_data[start_index_augmented+8:])
timestamp = fields_prof[0]
sample = self._extract_sample(WfpEngWfpSioParserDataStatusParticle, None,
self._current_controller_timestamp +
profile_eng_data[start_index_augmented:parse_end_point],
float(ntplib.system_to_ntp_time(timestamp)))
# Set the new end point
parse_end_point = start_index_augmented
# Check for a normal status
elif start_index_normal >= 0 and \
STATUS_START_MATCHER.match(profile_eng_data[start_index_normal:parse_end_point]):
log.trace("Found OffloadProfileData without decimation factor")
fields_prof = struct.unpack_from('>I', profile_eng_data[start_index_normal+8:])
timestamp = fields_prof[0]
sample = self._extract_sample(WfpEngWfpSioParserDataStatusParticle, None,
self._current_controller_timestamp +
profile_eng_data[start_index_normal:parse_end_point],
float(ntplib.system_to_ntp_time(timestamp)))
parse_end_point = start_index_normal
# If neither, we are dealing with a global wfp_sio e recovered engineering data record,
# so we will save the start and end points
elif global_recovered_eng_rec_index >= 0:
log.trace("Found OffloadEngineeringData")
fields_prof = struct.unpack_from('>I', profile_eng_data[global_recovered_eng_rec_index:])
timestamp = fields_prof[0]
sample = self._extract_sample(WfpEngWfpSioParserDataEngineeringParticle, None,
profile_eng_data[
global_recovered_eng_rec_index:parse_end_point],
float(ntplib.system_to_ntp_time(timestamp)))
# Set the new end point
parse_end_point = global_recovered_eng_rec_index
# We must not have a good file, log some debug info for now
else:
log.debug("start_index_augmented %d", start_index_augmented)
log.debug("start_index_normal %d", start_index_normal)
log.debug("global_recovered_eng_rec_index %d", global_recovered_eng_rec_index)
self._exception_callback(SampleException("Data invalid"))
if sample:
log.trace("Sample found: %s", sample.generate())
# create particle
self._result_particles.append(sample)
def parse_chunks(self):
"""
Parse out any pending data chunks in the chunker. If
it is a valid data piece, build a particle, update the position and
timestamp. Go until the chunker has no more valid data.
@retval a list of tuples with sample particles encountered in this
parsing, plus the state. An empty list if nothing was parsed.
"""
result_particles = []
(timestamp, chunk) = self._chunker.get_next_data()
while chunk is not None:
sio_header_match = SIO_HEADER_MATCHER.match(chunk)
log.debug('parsing header %s',
sio_header_match.group(0)[1:SIO_HEADER_BYTES])
if sio_header_match.group(1) != 'WE':
log.warn(" chunk did not match header WE %s",
chunk[0:SIO_HEADER_BYTES])
# get the next chunk
(timestamp, chunk) = self._chunker.get_next_data()
continue # jump to next iteration of the chunk loop
# Parse/match the E file header
e_header_match = WFP_E_GLOBAL_FLAGS_HEADER_MATCHER.search(
chunk[SIO_HEADER_BYTES:SIO_HEADER_BYTES + HEADER_BYTES + 1])
if not e_header_match:
# no e header match
log.warn("*BAD E HEADER 0x%s",
":".join("{:02x}".format(ord(c)) for c in chunk))
self._exception_callback(
UnexpectedDataException("Found unexpected data."))
# get the next chunk
(timestamp, chunk) = self._chunker.get_next_data()
continue # jump to next iteration of the chunk loop
payload = chunk[SIO_HEADER_BYTES + HEADER_BYTES + 1:]
data_split = self.we_split_function(payload)
log.debug('Found data match in chunk %s',
chunk[1:SIO_HEADER_BYTES])
for ii in range(0, len(data_split)):
e_record = payload[data_split[ii][0]:data_split[ii][1]]
log.debug('Extracted E Record to store in particle %s',
hexlify(e_record))
# particle-ize the data block received, return the record
if not STATUS_START_MATCHER.match(e_record[0:STATUS_BYTES]):
fields = struct.unpack('>I', e_record[0:4])
timestamp_s = float(fields[0])
timestamp = ntplib.system_to_ntp_time(timestamp_s)
if len(e_record) == E_GLOBAL_SAMPLE_BYTES:
# create particle
log.debug('Particle created with raw data %s',
hexlify(e_record))
log.debug('Particle timestamp = %f', timestamp)
sample = self._extract_sample(
DostaLnWfpSioDataParticle, None, e_record,
timestamp)
result_particles.append(sample)
(timestamp, chunk) = self._chunker.get_next_data()
return result_particles
def we_split_function(self, raw_data):
"""
Sort through the raw data to identify new blocks of data that need processing.
This is needed instead of a regex because blocks are identified by position
in this binary file.
"""
form_list = []
raw_data_len = len(raw_data)
"""
The Status messages
can have an optional 2 bytes on the end, and since the rest of the data
is relatively un-formatted packed binary records, detecting the presence of
that optional 2 bytes can be difficult. The only pattern we have to detect
is the STATUS_START field ( 4 bytes FF FF FF F[A-F] ). Peel this
apart by parsing backwards, using the end-of-record as an additional anchor
point.
"""
# '-1' to remove the '\x03' end-of-record marker
parse_end_point = raw_data_len - 1
while parse_end_point > 0:
# look for a status message at postulated message header position
# look for an augmented status
if STATUS_START_MATCHER.match(
raw_data[parse_end_point -
STATUS_BYTES_AUGMENTED:parse_end_point]):
# A hit for the status message at the augmented offset
# NOTE, we don't need the status messages, so we drop them on the floor here
# and only deliver a stream of samples to build_parse_values
parse_end_point = parse_end_point - STATUS_BYTES_AUGMENTED
# check if this is a un-augmented status
elif STATUS_START_MATCHER.match(
raw_data[parse_end_point - STATUS_BYTES:parse_end_point]):
# A hit for the status message at the un-augmented offset
# NOTE: same as above
parse_end_point = parse_end_point - STATUS_BYTES
else:
# assume if not a stat that hit above, we have a sample. If we mis-parse, we
# will end up with extra bytes when we finish, and sample_except at that point.
form_list.append(
(parse_end_point - E_GLOBAL_SAMPLE_BYTES, parse_end_point))
parse_end_point = parse_end_point - E_GLOBAL_SAMPLE_BYTES
# if the remaining bytes are less than the data sample bytes,
# all we might have left is a status sample, if we don't we're done
if parse_end_point != 0 and \
parse_end_point < STATUS_BYTES and \
parse_end_point < E_GLOBAL_SAMPLE_BYTES and \
parse_end_point < STATUS_BYTES_AUGMENTED:
self._exception_callback(
UnexpectedDataException(
"Error sieving WE data, inferred sample/status alignment incorrect"
))
return_list = []
return return_list
# since we parsed this backwards, we need to reverse to list to deliver the data in the correct order
return_list = form_list[::-1]
log.debug("returning we sieve list %s", return_list)
return return_list
def parse_chunks(self):
"""
Parse out any pending data chunks in the chunker. If
it is a valid data piece, build a particle, update the position and
timestamp. Go until the chunker has no more valid data.
@retval a list of tuples with sample particles encountered in this
parsing, plus the state. An empty list of nothing was parsed.
"""
result_particles = []
(timestamp, chunk, start, end) = self._chunker.get_next_data_with_index(clean=True)
while chunk is not None:
header_match = SIO_HEADER_MATCHER.match(chunk)
sample_count = 0
# Check to see if we are dealing with a wfp_eng SIO chunk
if header_match.group(1) == 'WE':
data_match = DATA_MATCHER.match(chunk[len(header_match.group(0)):])
controller_timestamp = header_match.group(3)
if data_match:
sensor_profile_start_time_data = data_match.group(2)
if sensor_profile_start_time_data:
# Need to unpack the sensor profile start time timestamp
fields_prof = struct.unpack_from('>I', sensor_profile_start_time_data[4:])
timestamp = fields_prof[0]
sample = self._extract_sample(WfpEngWfpSioMuleParserDataStartTimeParticle, None,
controller_timestamp +
sensor_profile_start_time_data,
float(ntplib.system_to_ntp_time(timestamp)))
if sample:
log.debug("Sample found: %s", sample)
# create particle
result_particles.append(sample)
sample_count += 1
profile_eng_data = data_match.group(3)
# Start from the end of the chunk and working backwards
parse_end_point = len(profile_eng_data)
# We are going to go through the file data in reverse order since we have a
# variable length sample record that could have a decimation factor.
# While we do not hit the beginning of the file contents, continue
while parse_end_point > 0:
# Create the different start indices for the three different scenarios
start_index_augmented = parse_end_point-STATUS_BYTES_AUGMENTED
start_index_normal = parse_end_point-STATUS_BYTES
global_recovered_eng_rec_index = parse_end_point-WFP_E_GLOBAL_RECOVERED_ENG_DATA_SAMPLE_BYTES
# Check for an an augmented status first
if start_index_augmented >= 0 and \
STATUS_START_MATCHER.match(profile_eng_data[start_index_augmented:parse_end_point]):
log.debug("Found OffloadProfileData with decimation factor")
fields_prof = struct.unpack_from('>I', profile_eng_data[start_index_augmented+8:])
timestamp = fields_prof[0]
sample = self._extract_sample(WfpEngWfpSioMuleParserDataStatusParticle, None,
controller_timestamp +
profile_eng_data[start_index_augmented:parse_end_point],
float(ntplib.system_to_ntp_time(timestamp)))
# Set the new end point
parse_end_point = start_index_augmented
# Check for a normal status
elif start_index_normal >= 0 and \
STATUS_START_MATCHER.match(profile_eng_data[start_index_normal:parse_end_point]):
log.debug("Found OffloadProfileData without decimation factor")
fields_prof = struct.unpack_from('>I', profile_eng_data[start_index_normal+8:])
timestamp = fields_prof[0]
sample = self._extract_sample(WfpEngWfpSioMuleParserDataStatusParticle, None,
controller_timestamp +
profile_eng_data[start_index_normal:parse_end_point],
float(ntplib.system_to_ntp_time(timestamp)))
parse_end_point = start_index_normal
# If neither, we are dealing with a global wfp e recovered engineering data record,
# so we will save the start and end points
elif global_recovered_eng_rec_index >= 0:
log.debug("Found OffloadEngineeringData")
fields_prof = struct.unpack_from('>I', profile_eng_data[global_recovered_eng_rec_index:])
timestamp = fields_prof[0]
sample = self._extract_sample(WfpEngWfpSioMuleParserDataEngineeringParticle, None,
profile_eng_data[
global_recovered_eng_rec_index:parse_end_point],
float(ntplib.system_to_ntp_time(timestamp)))
# Set the new end point
parse_end_point = global_recovered_eng_rec_index
# We must not have a good file, log some debug info for now
else:
log.debug("start_index_augmented %d", start_index_augmented)
log.debug("start_index_normal %d", start_index_normal)
log.debug("global_recovered_eng_rec_index %d", global_recovered_eng_rec_index)
self._exception_callback(SampleException("Data invalid"))
if sample:
log.debug("Sample found: %s", sample)
# create particle
result_particles.append(sample)
sample_count += 1
else:
self._exception_callback(SampleException("Unexpected data"))
# Important: We must set the sample count for every chunk
self._chunk_sample_count.append(sample_count)
(timestamp, chunk, start, end) = self._chunker.get_next_data_with_index()
return result_particles
def parse_chunks(self):
"""
Parse out any pending data chunks in the chunker. If
it is a valid data piece, build a particle, update the position and
timestamp. Go until the chunker has no more valid data.
@retval a list of tuples with sample particles encountered in this
parsing, plus the state. An empty list if nothing was parsed.
"""
result_particles = []
(timestamp, chunk) = self._chunker.get_next_data()
while chunk is not None:
sio_header_match = SIO_HEADER_MATCHER.match(chunk)
log.debug('parsing header %s', sio_header_match.group(0)[1:SIO_HEADER_BYTES])
if sio_header_match.group(1) != 'WE':
log.warn(" chunk did not match header WE %s", chunk[0:SIO_HEADER_BYTES])
# get the next chunk
(timestamp, chunk) = self._chunker.get_next_data()
continue # jump to next iteration of the chunk loop
# Parse/match the E file header
e_header_match = WFP_E_GLOBAL_FLAGS_HEADER_MATCHER.search(
chunk[SIO_HEADER_BYTES:SIO_HEADER_BYTES+HEADER_BYTES+1])
if not e_header_match:
# no e header match
log.warn("*BAD E HEADER 0x%s",
":".join("{:02x}".format(ord(c)) for c in chunk))
self._exception_callback(UnexpectedDataException("Found unexpected data."))
# get the next chunk
(timestamp, chunk) = self._chunker.get_next_data()
continue # jump to next iteration of the chunk loop
payload = chunk[SIO_HEADER_BYTES+HEADER_BYTES+1:]
data_split = self.we_split_function(payload)
log.debug('Found data match in chunk %s', chunk[1:SIO_HEADER_BYTES])
for ii in range(0, len(data_split)):
e_record = payload[data_split[ii][0]:data_split[ii][1]]
log.debug('Extracted E Record to store in particle %s', hexlify(e_record))
# particle-ize the data block received, return the record
if not STATUS_START_MATCHER.match(e_record[0:STATUS_BYTES]):
fields = struct.unpack('>I', e_record[0:4])
timestamp_s = float(fields[0])
timestamp = ntplib.system_to_ntp_time(timestamp_s)
if len(e_record) == E_GLOBAL_SAMPLE_BYTES:
# create particle
log.debug('Particle created with raw data %s', hexlify(e_record))
log.debug('Particle timestamp = %f', timestamp)
sample = self._extract_sample(DostaLnWfpSioDataParticle,
None,
e_record,
timestamp)
result_particles.append(sample)
(timestamp, chunk) = self._chunker.get_next_data()
return result_particles
def parse_chunks(self):
"""
Parse out any pending data chunks in the chunker. If
it is a valid data piece, build a particle, update the position and
timestamp. Go until the chunker has no more valid data.
@retval a list of tuples with sample particles encountered in this
parsing, plus the state. An empty list if nothing was parsed.
"""
result_particles = []
(timestamp, chunk) = self._chunker.get_next_data()
while (chunk != None):
sio_header_match = SIO_HEADER_MATCHER.match(chunk)
sample_count = 0
log.debug('parsing header %s',
sio_header_match.group(0)[1:SIO_HEADER_BYTES])
if sio_header_match.group(1) == 'WE':
log.trace(
"********************************matched chunk header %s",
chunk[0:SIO_HEADER_BYTES])
# Parse/match the E file header
e_header_match = WFP_E_GLOBAL_FLAGS_HEADER_MATCHER.search(
chunk[SIO_HEADER_BYTES:SIO_HEADER_BYTES + HEADER_BYTES +
1])
if e_header_match:
log.debug(
'******************************* HEADER MATCH WAS:')
log.debug(
'%s', ":".join(
"{:02x}".format(ord(c))
for c in chunk[SIO_HEADER_BYTES:SIO_HEADER_BYTES +
HEADER_BYTES + 1]))
payload = chunk[SIO_HEADER_BYTES + HEADER_BYTES + 1:]
data_split = self.we_split_function(payload)
if data_split:
log.debug('Found data match in chunk %s',
chunk[1:SIO_HEADER_BYTES])
for ii in range(0, len(data_split)):
e_record = payload[
data_split[ii][0]:data_split[ii][1]]
# particle-ize the data block received, return the record
if not STATUS_START_MATCHER.match(
e_record[0:STATUS_BYTES]):
fields = struct.unpack('>I', e_record[0:4])
timestampS = float(fields[0])
timestamp = ntplib.system_to_ntp_time(
timestampS)
if len(e_record) == E_GLOBAL_SAMPLE_BYTES:
sample = self._extract_sample(
DostaLnWfpSioMuleParserDataParticle,
None, e_record, timestamp)
if sample:
# create particle
result_particles.append(sample)
sample_count += 1
else: # no e header match
log.warn(
"*****************************************************BAD E HEADER 0x%s",
":".join("{:02x}".format(ord(c)) for c in chunk))
self._exception_callback(
UnexpectedDataException("Found unexpected data."))
self._chunk_sample_count.append(sample_count)
(timestamp, chunk, start,
end) = self._chunker.get_next_data_with_index()
return result_particles
