horusdemodlib/horusdemodlib/payloads.py

346 wiersze
12 KiB
Python

#
# HorusLib - Payload ID List
#
import json
import logging
import requests
import struct
# Global payload list - Basic version
HORUS_PAYLOAD_LIST = {0:'4FSKTEST', 1:'HORUSBINARY', 256: '4FSKTEST-V2'}
# URL for payload list
PAYLOAD_ID_LIST_URL = "https://raw.githubusercontent.com/projecthorus/horusdemodlib/master/payload_id_list.txt"
# Custom field data.
HORUS_CUSTOM_FIELD_LENGTH = 9
HORUS_CUSTOM_FIELDS = {
"HORUSTEST": {
"struct": "<BbBfH",
"fields": [
["cutdown_battery_voltage", "battery_5v_byte"],
["external_temperature", "none"],
["test_counter", "none"],
["test_float_field", "none"],
["test_int_field", "none"]
]
},
"HORUSTEST2": {
"struct": "<BbBH4x",
"fields": [
["cutdown_battery_voltage", "battery_5v_byte"],
["external_temperature", "none"],
["test_counter", "none"],
["test_int_field", "none"]
]
},
"4FSKTEST-V2": {
"struct": "<hhBHxx",
"fields": [
["ascent_rate", "divide_by_100"],
["ext_temperature", "divide_by_10"],
["ext_humidity", "none"],
["ext_pressure", "divide_by_10"]
]
}
}
# Custom Field JSON URL
HORUS_CUSTOM_FIELD_URL = "https://raw.githubusercontent.com/projecthorus/horusdemodlib/master/custom_field_list.json"
def read_payload_list(filename="payload_id_list.txt"):
""" Read a payload ID list from a file, and return the parsed data as a dictionary """
# Dummy payload list.
payload_list = HORUS_PAYLOAD_LIST
try:
with open(filename,'r') as file:
for line in file:
# Skip comment lines.
if line[0] == '#':
continue
else:
# Attempt to split the line with a comma.
_params = line.split(',')
if len(_params) != 2:
# Invalid line.
logging.error("Could not parse line: %s" % line)
else:
try:
_id = int(_params[0])
_callsign = _params[1].strip()
payload_list[_id] = _callsign
except:
logging.error("Error parsing line: %s" % line)
except Exception as e:
logging.error("Error reading Payload ID list, does it exist? - %s" % str(e))
logging.debug("Known Payload IDs:")
for _payload in payload_list:
logging.debug("\t%s - %s" % (_payload, payload_list[_payload]))
return payload_list
def download_latest_payload_id_list(url=PAYLOAD_ID_LIST_URL, filename=None, timeout=5):
"""
Attempt to download the latest payload ID list from Github, and parse into a dictionary.
Optionally, save it to a file.
"""
# Download the list.
try:
logging.info("Attempting to download latest payload ID list from GitHub...")
_r = requests.get(url, timeout=timeout)
except Exception as e:
logging.error("Unable to get latest payload ID list: %s" % str(e))
return None
# Check it is what we think it is..
if "HORUS BINARY PAYLOAD ID LIST" not in _r.text:
logging.error("Downloaded payload ID list is invalid.")
return None
_text = _r.text
_payload_list = {}
try:
for line in _r.text.split('\n'):
if line == "":
continue
# Skip comment lines.
if line[0] == '#':
continue
else:
# Attempt to split the line with a comma.
_params = line.split(',')
if len(_params) != 2:
# Invalid line.
logging.error("Could not parse line: %s" % line)
else:
try:
_id = int(_params[0])
_callsign = _params[1].strip()
_payload_list[_id] = _callsign
except:
logging.error("Error parsing line: %s" % line)
except Exception as e:
logging.error("Error reading Payload ID list - %s" % str(e))
return None
if filename != None:
try:
with open(filename, 'w') as f:
f.write(_r.text)
except Exception as e:
logging.error(f"Error writing payload list to file {filename} - {str(e)}")
logging.debug("Known Payload IDs:")
for _payload in _payload_list:
logging.debug("\t%s - %s" % (_payload, _payload_list[_payload]))
return _payload_list
def init_payload_id_list(filename="payload_id_list.txt", nodownload=False):
""" Initialise and update the local payload ID list. """
if not nodownload:
_list = download_latest_payload_id_list(filename=filename)
if _list:
HORUS_PAYLOAD_LIST = _list
else:
logging.warning("Could not download Payload ID List - attempting to use local version.")
HORUS_PAYLOAD_LIST = read_payload_list(filename=filename)
else:
HORUS_PAYLOAD_LIST = read_payload_list(filename=filename)
return HORUS_PAYLOAD_LIST
def read_custom_field_list(filename="custom_field_list.json"):
"""
Read in a JSON file containing descriptions of custom payload fields,
for use with the Horus Binary v2 32-byte payload format.
"""
_custom_field_list = HORUS_CUSTOM_FIELDS
try:
# Read in entirity of file contents.
_f = open(filename, 'r')
_raw_data = _f.read()
_f.close()
# Attempt to parse JSON
_field_data = json.loads(_raw_data)
if type(_field_data) != dict:
logging.error("Error reading custom field list, using defaults.")
return _custom_field_list
# Iterate through fields in the file we just read in
for _payload in _field_data:
_data = _field_data[_payload]
if ("struct" in _data) and ("fields" in _data):
# Check the struct value has the right length
try:
_structsize = struct.calcsize(_data["struct"])
if _structsize == HORUS_CUSTOM_FIELD_LENGTH:
_custom_field_list[_payload] = {
"struct": _data["struct"],
"fields": _data["fields"]
}
logging.debug(f"Loaded custom field data for {_payload}.")
else:
logging.error(f"Struct field for {_payload} has incorrect length ({_structsize}).")
except Exception as e:
logging.error(f"Could not parse custom field data for {_payload}: {str(e)}")
return _custom_field_list
except Exception as e:
logging.error(f"Error parsing custom field list file ({filename}): {str(e)}")
return _custom_field_list
def grab_latest_custom_field_list(url=HORUS_CUSTOM_FIELD_URL, local_file="custom_field_list.json"):
""" Attempt to download the latest custom field list from Github """
# Download the list.
try:
logging.info("Attempting to download latest custom field list from GitHub...")
_r = requests.get(url, timeout=10)
except Exception as e:
logging.error("Unable to get latest custom field list: %s" % str(e))
return False
# Check it is what we think it is..
# (Currently checking for the presence of one of the test payloads)
if "HORUSTEST" not in _r.text:
logging.error("Downloaded custom field list is invalid.")
return False
# So now we most likely have a valid custom field list, so write it out.
with open(local_file, 'w') as f:
f.write(_r.text)
logging.info("Updated custom field list successfully!")
return True
def download_latest_custom_field_list(url=HORUS_CUSTOM_FIELD_URL, filename=None, timeout=5):
""" Attempt to download the latest custom field list from Github """
# Download the list.
try:
logging.info("Attempting to download latest custom field list from GitHub...")
_r = requests.get(url, timeout=timeout)
except Exception as e:
logging.error("Unable to get latest custom field list: %s" % str(e))
return None
# Check it is what we think it is..
# (Currently checking for the presence of one of the test payloads)
if "HORUSTEST" not in _r.text:
logging.error("Downloaded custom field list is invalid.")
return None
_text = _r.text
_custom_field_list = {}
try:
# Attempt to parse JSON
_field_data = json.loads(_r.text)
if type(_field_data) != dict:
logging.error("Error reading custom field list - Incorrect input format.")
return None
# Iterate through fields in the file we just read in
for _payload in _field_data:
_data = _field_data[_payload]
if ("struct" in _data) and ("fields" in _data):
# Check the struct value has the right length
try:
_structsize = struct.calcsize(_data["struct"])
if _structsize == HORUS_CUSTOM_FIELD_LENGTH:
_custom_field_list[_payload] = {
"struct": _data["struct"],
"fields": _data["fields"]
}
logging.debug(f"Loaded custom field data for {_payload}.")
else:
logging.error(f"Struct field for {_payload} has incorrect length ({_structsize}).")
except Exception as e:
logging.error(f"Could not parse custom field data for {_payload}: {str(e)}")
except Exception as e:
logging.error(f"Could not parse downloaded custom field list - {str(e)}")
return None
if filename != None:
try:
with open(filename, 'w') as f:
f.write(_r.text)
except Exception as e:
logging.error(f"Error writing custom field list to file {filename} - {str(e)}")
return _custom_field_list
def init_custom_field_list(filename="custom_field_list.json", nodownload=False):
""" Initialise and update the local custom field list """
if not nodownload:
_list = download_latest_custom_field_list(filename=filename)
if _list:
HORUS_CUSTOM_FIELDS = _list
else:
logging.warning("Could not download Custom Field List - attempting to use local version.")
HORUS_CUSTOM_FIELDS = read_custom_field_list(filename=filename)
else:
HORUS_CUSTOM_FIELDS = read_custom_field_list(filename=filename)
return HORUS_CUSTOM_FIELDS
def update_payload_lists(payload_list, custom_field_list):
""" Helper function to get updated lists into the right namespace """
global HORUS_PAYLOAD_LIST, HORUS_CUSTOM_FIELDS
HORUS_PAYLOAD_LIST = payload_list
HORUS_CUSTOM_FIELDS = custom_field_list
if __name__ == "__main__":
import argparse
# Read command-line arguments
parser = argparse.ArgumentParser(description="Test script for payload ID lists", formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument("--download", action="store_false", default=True, help="Download lists from github, then check")
parser.add_argument("--print", action="store_true", default=False, help="Print content of payload ID lists")
args = parser.parse_args()
# Set up logging
logging.basicConfig(format="%(asctime)s %(levelname)s: %(message)s", level=logging.DEBUG)
init_payload_id_list(nodownload=args.download)
init_custom_field_list(nodownload=args.download)
if args.print:
print(HORUS_PAYLOAD_LIST)
print(HORUS_CUSTOM_FIELDS)