from owrx.config import PropertyManager from owrx.source import DspManager, CpuUsageThread, SdrService, ClientRegistry from owrx.feature import FeatureDetector from owrx.version import openwebrx_version import json from owrx.map import Map import logging logger = logging.getLogger(__name__) class Client(object): def __init__(self, conn): self.conn = conn def protected_send(self, data): try: self.conn.send(data) # these exception happen when the socket is closed except OSError: self.close() except ValueError: self.close() def close(self): self.conn.close() logger.debug("connection closed") class OpenWebRxReceiverClient(Client): config_keys = ["waterfall_colors", "waterfall_min_level", "waterfall_max_level", "waterfall_auto_level_margin", "lfo_offset", "samp_rate", "fft_size", "fft_fps", "audio_compression", "fft_compression", "max_clients", "start_mod", "client_audio_buffer_size", "start_freq", "center_freq", "mathbox_waterfall_colors", "mathbox_waterfall_history_length", "mathbox_waterfall_frequency_resolution"] def __init__(self, conn): super().__init__(conn) self.dsp = None self.sdr = None self.configSub = None ClientRegistry.getSharedInstance().addClient(self) pm = PropertyManager.getSharedInstance() self.setSdr() # send receiver info receiver_keys = ["receiver_name", "receiver_location", "receiver_qra", "receiver_asl", "receiver_gps", "photo_title", "photo_desc"] receiver_details = dict((key, pm.getPropertyValue(key)) for key in receiver_keys) self.write_receiver_details(receiver_details) profiles = [{"name": s.getName() + " " + p["name"], "id":sid + "|" + pid} for (sid, s) in SdrService.getSources().items() for (pid, p) in s.getProfiles().items()] self.write_profiles(profiles) features = FeatureDetector().feature_availability() self.write_features(features) CpuUsageThread.getSharedInstance().add_client(self) def setSdr(self, id = None): next = SdrService.getSource(id) if (next == self.sdr): return self.stopDsp() if self.configSub is not None: self.configSub.cancel() self.configSub = None self.sdr = next # send initial config configProps = self.sdr.getProps().collect(*OpenWebRxReceiverClient.config_keys).defaults(PropertyManager.getSharedInstance()) def sendConfig(key, value): config = dict((key, configProps[key]) for key in OpenWebRxReceiverClient.config_keys) # TODO mathematical properties? hmmmm config["start_offset_freq"] = configProps["start_freq"] - configProps["center_freq"] self.write_config(config) self.configSub = configProps.wire(sendConfig) sendConfig(None, None) self.sdr.addSpectrumClient(self) def startDsp(self): if self.dsp is None: self.dsp = DspManager(self, self.sdr) self.dsp.start() def close(self): self.stopDsp() CpuUsageThread.getSharedInstance().remove_client(self) ClientRegistry.getSharedInstance().removeClient(self) if self.configSub is not None: self.configSub.cancel() self.configSub = None super().close() def stopDsp(self): if self.dsp is not None: self.dsp.stop() self.dsp = None if self.sdr is not None: self.sdr.removeSpectrumClient(self) def setParams(self, params): # only the keys in the protected property manager can be overridden from the web protected = self.sdr.getProps().collect("samp_rate", "center_freq", "rf_gain", "type", "if_gain") \ .defaults(PropertyManager.getSharedInstance()) for key, value in params.items(): protected[key] = value def setDspProperties(self, params): for key, value in params.items(): self.dsp.setProperty(key, value) def write_spectrum_data(self, data): self.protected_send(bytes([0x01]) + data) def write_dsp_data(self, data): self.protected_send(bytes([0x02]) + data) def write_s_meter_level(self, level): self.protected_send({"type":"smeter","value":level}) def write_cpu_usage(self, usage): self.protected_send({"type":"cpuusage","value":usage}) def write_clients(self, clients): self.protected_send({"type":"clients","value":clients}) def write_secondary_fft(self, data): self.protected_send(bytes([0x03]) + data) def write_secondary_demod(self, data): self.protected_send(bytes([0x04]) + data) def write_secondary_dsp_config(self, cfg): self.protected_send({"type":"secondary_config", "value":cfg}) def write_config(self, cfg): self.protected_send({"type":"config","value":cfg}) def write_receiver_details(self, details): self.protected_send({"type":"receiver_details","value":details}) def write_profiles(self, profiles): self.protected_send({"type":"profiles","value":profiles}) def write_features(self, features): self.protected_send({"type":"features","value":features}) def write_metadata(self, metadata): self.protected_send({"type":"metadata","value":metadata}) class MapConnection(Client): def __init__(self, conn): super().__init__(conn) pm = PropertyManager.getSharedInstance() self.write_config(pm.collect("google_maps_api_key", "receiver_gps").__dict__()) Map.getSharedInstance().addClient(self) def close(self): Map.getSharedInstance().removeClient(self) super().close() def write_config(self, cfg): self.protected_send({"type":"config","value":cfg}) def write_update(self, update): self.protected_send({"type":"update","value":update}) class WebSocketMessageHandler(object): def __init__(self): self.handshake = None self.client = None self.dsp = None def handleTextMessage(self, conn, message): if (message[:16] == "SERVER DE CLIENT"): meta = message[17:].split(" ") self.handshake = {v[0]: "=".join(v[1:]) for v in map(lambda x: x.split("="), meta)} conn.send("CLIENT DE SERVER server=openwebrx version={version}".format(version = openwebrx_version)) logger.debug("client connection intitialized") if "type" in self.handshake: if self.handshake["type"] == "receiver": self.client = OpenWebRxReceiverClient(conn) if self.handshake["type"] == "map": self.client = MapConnection(conn) # backwards compatibility else: self.client = OpenWebRxReceiverClient(conn) return if not self.handshake: logger.warning("not answering client request since handshake is not complete") return try: message = json.loads(message) if "type" in message: if message["type"] == "dspcontrol": if "action" in message and message["action"] == "start": self.client.startDsp() if "params" in message: params = message["params"] self.client.setDspProperties(params) if message["type"] == "config": if "params" in message: self.client.setParams(message["params"]) if message["type"] == "setsdr": if "params" in message: self.client.setSdr(message["params"]["sdr"]) if message["type"] == "selectprofile": if "params" in message and "profile" in message["params"]: profile = message["params"]["profile"].split("|") self.client.setSdr(profile[0]) self.client.sdr.activateProfile(profile[1]) else: logger.warning("received message without type: {0}".format(message)) except json.JSONDecodeError: logger.warning("message is not json: {0}".format(message)) def handleBinaryMessage(self, conn, data): logger.error("unsupported binary message, discarding") def handleClose(self, conn): if self.client: self.client.close()