def __init__(self, scheduler, config):
self.scheduler = scheduler
self.config = config
self.photo_capture = PhotoCapture(config["imagepath"])
self.host = socket.gethostname()
self.ip_address = socket.gethostbyname(self.host)
# set up the routes manually
bottle.route('/static/<filepath:path>', method='GET')(self.static)
bottle.route('/', method='GET')(self.index)
bottle.route('/meerkat/', method='GET')(self.meerkat)
bottle.route('/meerkat/heartbeat.json', method='GET')(self.register_control_json)
bottle.route('/meerkat/info.json', method='GET')(self.info_json)
bottle.route('/meerkat/master.json', method='GET')(self.master_json)
bottle.route('/meerkat/master.json', method='POST')(self.master_control_json)
bottle.route('/meerkat/register.json', method='POST')(self.register_control_json)
bottle.route('/meerkat/capture.json', method='POST')(self.capture_control_json)
bottle.route('/meerkat/probes.json', method='GET')(self.probes_json)
bottle.route('/meerkat/probe<p:int>.json', method='GET')(self.probe_json)
bottle.route('/meerkat/probe<p:int>.json', method='POST')(self.probe_control_json)
bottle.route('/meerkat/log.json', method='GET')(self.log_json)
class HttpServer(object):
def __init__(self, scheduler, config):
self.scheduler = scheduler
self.config = config
self.photo_capture = PhotoCapture(config["imagepath"])
self.host = socket.gethostname()
self.ip_address = socket.gethostbyname(self.host)
# set up the routes manually
bottle.route('/static/<filepath:path>', method='GET')(self.static)
bottle.route('/', method='GET')(self.index)
bottle.route('/meerkat/', method='GET')(self.meerkat)
bottle.route('/meerkat/heartbeat.json', method='GET')(self.register_control_json)
bottle.route('/meerkat/info.json', method='GET')(self.info_json)
bottle.route('/meerkat/master.json', method='GET')(self.master_json)
bottle.route('/meerkat/master.json', method='POST')(self.master_control_json)
bottle.route('/meerkat/register.json', method='POST')(self.register_control_json)
bottle.route('/meerkat/capture.json', method='POST')(self.capture_control_json)
bottle.route('/meerkat/probes.json', method='GET')(self.probes_json)
bottle.route('/meerkat/probe<p:int>.json', method='GET')(self.probe_json)
bottle.route('/meerkat/probe<p:int>.json', method='POST')(self.probe_control_json)
bottle.route('/meerkat/log.json', method='GET')(self.log_json)
def start(self):
self.http_thread = Thread(target=bottle.run,
kwargs=dict(host=self.config['http_host'], port=self.config['http_port'], server='wsgiref', debug=False, quiet=True),
name='http-thread')
self.http_thread.setDaemon(True)
self.http_thread.start()
logging.info("Http server started on port %s." % self.config["http_port"])
def index(self):
redirect('/meerkat/')
def meerkat(self):
return template('index', scheduler=self.scheduler)
def probes_json(self):
probes = []
i = 0
for p in self.scheduler.probes:
probes.append(self.helper_get_probe_struct(p))
i = i + 1
ret = {"status": "OK",
"body": {
"probes": probes
}
}
response.set_header('Cache-Control', 'No-store')
return json.dumps(ret)
def probe_json(self, p):
ret = {"status": "OK",
"body": self.helper_get_probe_struct(self.scheduler.probes[p])
}
response.set_header('Cache-Control', 'No-store')
return json.dumps(ret)
def probe_control_json(self, p):
command = request.forms.command
if command == 'ON':
self.scheduler.start_probe(p)
#self.scheduler.queue.put( (COMMAND_EXEC, 'start_probe', p) )
elif command == 'OFF':
self.scheduler.stop_probe(p)
#self.scheduler.queue.put( (COMMAND_EXEC, 'stop_probe', p) )
time.sleep(0.5)
response.set_header('Cache-Control', 'No-store')
return self.probe_json(p)
def info_json(self):
probes = []
i = 0
for p in self.scheduler.probes:
probes.append(self.helper_get_probe_struct(p))
i = i + 1
ret = {"status": "OK",
"body": {
"id": None,
"info": self.helper_get_master_struct(),
"probes": probes
}
}
ret["body"]["id"] = ret["body"]["info"]["host"]
response.set_header('Cache-Control', 'No-store')
return json.dumps(ret)
def master_json(self):
ret = {"status": "OK",
"body": self.helper_get_master_struct()
}
response.set_header('Cache-Control', 'No-store')
return json.dumps(ret)
def master_control_json(self):
command = request.forms.command
if command == 'ON':
self.scheduler.start_probes()
#self.scheduler.queue.put( (COMMAND_EXEC, 'start_probes') )
elif command == 'OFF':
self.scheduler.stop_probes()
#self.scheduler.queue.put( (COMMAND_EXEC, 'stop_probes') )
time.sleep(1)
response.set_header('Cache-Control', 'No-store')
return self.master_json()
def register_control_json(self):
ret = {"status": "OK",
"body": ""
}
try:
r = requests.post(self.config["mission_control"]["register_url"], data=self.info_json())
ret = r.text
except Exception as ex:
ret["status"] = "ERROR"
ret["body"] = str(ex)
response.set_header('Cache-Control', 'No-store')
return json.dumps(ret)
def capture_control_json(self):
ret = {"status": "OK",
"body": None
}
try:
ret["body"] = self.photo_capture.capture()
except Exception as ex:
ret["status"] = "ERROR"
ret["body"] = str(ex)
response.set_header('Cache-Control', 'No-store')
return json.dumps(ret)
def log_json(self):
lines = request.query.n or 10
stdin,stdout = os.popen2("tail -n %s %s" % (lines, self.config['logfile']))
stdin.close()
log = stdout.readlines()
stdout.close()
ret = {"status": "OK",
"body": {
"log": log,
}
}
response.set_header('Cache-Control', 'No-store')
return json.dumps(ret)
def static(self, filepath):
if 'latest' in filepath:
response.set_header('Cache-Control', 'No-store')
return static_file(filepath, root=STATIC_ROOT)
######### HELPERS ########################################################
def helper_get_probe_data(self, probe):
ret = []
records = 1
storage = Storage(self.config["datafile"])
for r in storage.get_records_by_probe_id(probe.id, records):
record = {
"metadata": {
"probe_id": r[0],
"timestamp": r[2],
"length": r[3],
},
"data": str(r[4]).encode('utf-8')
}
if (record["data"].startswith('{') or record["data"].startswith('[')):
try:
record["data"] = json.loads(record["data"])
if type(record["data"]) == dict:
record["data"] = [record["data"]]
except:
pass
ret.append(record)
storage.close()
return ret
def helper_get_probe_filters(self, filters):
ret = []
for f in filters:
ret.append(f.id)
return ret
def helper_get_probe_struct(self, probe):
ret = {
"id": "probe%s" % probe.index,
"index": probe.index,
"label": probe.id,
"status": "OFF",
"command": ' '.join(probe.command),
"data": self.helper_get_probe_data(probe),
"filters": self.helper_get_probe_filters(probe.filters),
"error_filters": self.helper_get_probe_filters(probe.error_filters),
"interval": probe.interval,
"duration": probe.duration,
"dummy": probe.dummy,
"last_error": probe.last_error
}
if probe.running:
ret["status"] = "ON"
return ret
def helper_get_master_struct(self):
ret = {
"timestamp": time.time() * 1000,
"status": "OFF",
"ip_address": self.ip_address,
"net_interfaces": self.helper_get_net_interfaces(),
"host": self.host,
"heartbeat_url": "https://%s/meerkat/heartbeat.json" % (self.host),
"info_url": "https://%s/meerkat/info.json" % (self.host),
"dashboard_url": "https://%s/meerkat/" % (self.host),
"latest_img_url": "https://%s/static/img/latest.jpg?%s" % (self.host, time.time()),
"uptime_secs": self.helper_get_uptime_secs(),
"load_average": self.helper_get_load_average(),
"sys_temperature": self.helper_get_sys_temperature(),
"gpu_temperature": self.helper_get_gpu_temperature(),
"data_size_kb": self.helper_get_data_size_kb(),
"free_space_b": self.helper_get_free_space(),
"has_camera": self.config["has_camera"],
"available_memory_kb": 0,
"free_memory_kb": 0,
"mission_control_url": self.config['mission_control']['url'],
"mission_control_register_url": self.config['mission_control']['register_url']
}
if self.scheduler.active:
ret["status"] = "ON"
available_mem, free_mem = self.helper_get_memory_info()
ret["available_memory_kb"] = available_mem
ret["free_memory_kb"] = free_mem
return ret
def helper_get_free_space(self):
# TODO: should this be the where the data file is, not just '/'?
stat = os.statvfs('/')
return stat.f_bsize * stat.f_bavail
def helper_get_net_interfaces(self):
net_interfaces = '?'
cmd = 'ifconfig -s -a | sed 1d | cut -d " " -f1 | tr "\\\\n" ,'
try:
net_interfaces = check_output(cmd, shell=True).split(',')
net_interfaces.pop()
net_interfaces.pop()
except IOError:
pass
return net_interfaces
def helper_get_uptime_secs(self):
uptime = '?'
try:
with open('/proc/uptime', 'r') as f:
secs = f.readline()
uptime = float(secs.split()[0])
except IOError:
pass
return uptime
def helper_get_gpu_temperature(self):
gpu_temperature = '?'
cmd = '/opt/vc/bin/vcgencmd measure_temp | egrep "[0-9.]{4,}" -o'
try:
gpu_temperature = check_output(cmd, shell=True)
except IOError:
pass
return float(gpu_temperature)
def helper_get_sys_temperature(self):
sys_temperature = '?'
try:
with open('/sys/class/thermal/thermal_zone0/temp', 'r') as f:
sys_temperature = f.readline()
sys_temperature = float(sys_temperature) / 1000
except IOError:
pass
return sys_temperature
def helper_get_load_average(self):
load_average = '?'
try:
with open('/proc/loadavg', 'r') as f:
loadavg = f.readline()
loadavg = loadavg.split(' ')
loadavg = loadavg[:-2]
except IOError:
pass
return loadavg
def helper_get_memory_info(self):
meminfo = ('?', '?')
try:
with open('/proc/meminfo', 'r') as f:
available_mem = f.readline()
free_mem = f.readline()
meminfo = (int(available_mem.split()[1]), int(free_mem.split()[1]))
except IOError:
pass
return meminfo
def helper_get_data_size_kb(self):
bytes = os.path.getsize(self.config['datafile'])
return bytes / 1024
