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#!/usr/bin/env python3
from bottle import route, run, request, HTTPResponse, response
import hashlib
import json
import pdb
import os
updated = True
filename = "firmware.bin"
@route('/update')
def updateRequest():
#for header in request.headers.keys():
# print("{}: {}".format(header, request.headers.get(header, "")))
if not "X-Esp8266-Sta-Mac" in request.headers:
return "Hello fellow friend! Looking for updates?"
readConfig()
global config
requestor_mac = request.headers.get("X-Esp8266-Sta-Mac", "")
running_fw_md5 = request.headers.get("X-Esp8266-Sketch-Md5", "")
role, version, fw_filename, fw_hash = getProperties(config, requestor_mac)
if role == "" and version == "" and fw_filename == "" and fw_hash == "":
print("No configuration for {} found. Serving 304 - No Firmware".format(requestor_mac))
return nofirmware()
print("Update request from {} with role {} (running fw hash: {}).".format(requestor_mac, role, running_fw_md5))
fw_path = os.path.join("firmwares", role, version, fw_filename)
try:
latest_fw_md5 = md5(fw_path)
except FileNotFoundError:
print("Configured firmware not found at {}".format(fw_path))
return nofirmware()
if latest_fw_md5 != fw_hash:
print("Configured hash ({}) does not match calculeted one ({})".format(fw_hash, latest_fw_md5))
return nofirmware()
print("Latest firmware for role \"{}\" is \"{}\" ({}) - ".format(role, fw_filename, latest_fw_md5), end="")
if latest_fw_md5 == running_fw_md5:
print("Same, skipping…")
return nofirmware()
print("Differs, updating…")
response.set_header('Content-Type', 'application/octet-stream')
response.set_header('Content-Disposition', ' attachment; filename={}'.format(filename))
with open(fw_path, "rb") as fw:
firmware = fw.read()
response.set_header('Content-Length', '{}'.format(len(firmware)))
response.set_header('X-MD5', latest_fw_md5)
print("Serving {} bytes to {} with role {}".format(len(firmware), requestor_mac, role))
return firmware
def getProperties(config, mac):
configured_devices = config.get("devices", {}).keys()
devices = config.get("devices", {})
firmwares = config.get("firmwares", {})
match = devices.get(mac, {"role":"", "version":""})
role = match.get("role", "")
version = match.get("version", "")
role_firmwares = firmwares.get(role, {})
firmware = role_firmwares.get(version, {})
firmware_filename = firmware.get("filename", "")
firmware_hash = firmware.get("hash", "")
return role, version, firmware_filename, firmware_hash
def nofirmware():
return HTTPResponse(status=304, body="")
def md5(fname):
hash_md5 = hashlib.md5()
with open(fname, "rb") as f:
for chunk in iter(lambda: f.read(4096), b""):
hash_md5.update(chunk)
return hash_md5.hexdigest()
def readConfig(config_name="config.json"):
global config
config = ""
with open(config_name, "r") as conf:
config = json.loads(conf.read())
readConfig()
run(host='localhost', port=8080, debug=True)