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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright 2018 Daniel Estevez <daniel@destevez.net>
#
# This file is part of gr-satellites
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
# This contains code taken from
# https://github.com/PW-Sat2/SimpleUploader-radio.pw-sat.pl
# That code is licenced under the following terms:
# MIT License
#
# Copyright (c) 2017 SoftwareMill
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
import base64
import datetime
import json
from gnuradio import gr
import numpy
import pmt
from . import crc, hdlc
class pwsat2_submitter(gr.basic_block):
"""docstring for block pwsat2_submitter"""
def __init__(self, credentials_file, initialTimestamp):
gr.basic_block.__init__(
self,
name="pwsat2_submitter",
in_sig=[],
out_sig=[])
self.crc_calc = crc(16, 0x1021, 0xFFFF, 0xFFFF, True, True)
self.requests = __import__('requests')
self.baseUrl = 'http://radio.pw-sat.pl'
self.headers = {'content-type': 'application/json'}
dtformat = '%Y-%m-%d %H:%M:%S'
self.initialTimestamp = (
datetime.datetime.strptime(initialTimestamp, dtformat)
if initialTimestamp != '' else None)
self.startTimestamp = datetime.datetime.utcnow()
self.authenticate(credentials_file)
self.message_port_register_in(pmt.intern('in'))
self.set_msg_handler(pmt.intern('in'), self.handle_msg)
def authenticate(self, credentials_path):
try:
credentials = self.loadCredentials(credentials_path)
except (ValueError, IOError) as e:
print('Could not load credentials for', self.baseUrl)
print(e)
self.cookies = None
return
url = self.baseUrl+'/api/authenticate'
response = self.requests.post(url,
data=json.dumps(credentials),
headers=self.headers)
if response.status_code == 200:
self.cookies = response.cookies
else:
print('Could not authenticate to PW-Sat2 server')
print('Reply:', response.text)
print('HTTP code', response.status_code)
self.cookies = None
def loadCredentials(self, path):
with open(path) as f:
credentials = json.load(f)
return credentials
def putPacket(self, frame, timestamp):
if self.cookies is None:
print('Not uploading packet to',
self.baseUrl,
'as we are not authenticated')
return
url = self.baseUrl+'/communication/frame'
timestamp = (timestamp - datetime.datetime(1970, 1, 1)).total_seconds()
timestamp = int(timestamp * 1000)
payload = {'frame': str(base64.b64encode(frame), encoding='ascii'),
'timestamp': timestamp,
'traffic': 'Rx'}
response = self.requests.put(url,
data=json.dumps(payload),
headers=self.headers,
cookies=self.cookies)
return response.text
def handle_msg(self, msg_pmt):
msg = pmt.cdr(msg_pmt)
if not pmt.is_u8vector(msg):
print('[ERROR] Received invalid message type. Expected u8vector')
return
data = list(pmt.u8vector_elements(msg))
crc_val = self.crc_calc.compute(data)
data.append(crc_val & 0xff)
data.append((crc_val >> 8) & 0xff)
frame = bytes(data)
now = datetime.datetime.utcnow()
timestamp = (now - self.startTimestamp + self.initialTimestamp
if self.initialTimestamp else now)
response = self.putPacket(frame, timestamp)
if response:
print('Packet uploaded to', self.baseUrl, response)
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