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Fork of the espurna firmware for `mhsw` switches
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mhsw-espurna/code/espurna/ws.ino

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/*
WEBSOCKET MODULE
Copyright (C) 2016-2018 by Xose Pérez <xose dot perez at gmail dot com>
Module key prefix: ws
*/
#if WEB_SUPPORT
#include <ESPAsyncTCP.h>
#include <ESPAsyncWebServer.h>
#include <ArduinoJson.h>
#include <Ticker.h>
#include <vector>
#include "libs/WebSocketIncommingBuffer.h"
AsyncWebSocket _ws("/ws");
Ticker _web_defer;
std::vector<ws_on_send_callback_f> _ws_on_send_callbacks;
std::vector<ws_on_action_callback_f> _ws_on_action_callbacks;
// -----------------------------------------------------------------------------
// Private methods
// -----------------------------------------------------------------------------
typedef struct {
IPAddress ip;
unsigned long timestamp = 0;
} ws_ticket_t;
ws_ticket_t _ticket[WS_BUFFER_SIZE];
void _onAuth(AsyncWebServerRequest *request) {
webLog(request);
if (!webAuthenticate(request)) return request->requestAuthentication();
IPAddress ip = request->client()->remoteIP();
unsigned long now = millis();
unsigned short index;
for (index = 0; index < WS_BUFFER_SIZE; index++) {
if (_ticket[index].ip == ip) break;
if (_ticket[index].timestamp == 0) break;
if (now - _ticket[index].timestamp > WS_TIMEOUT) break;
}
if (index == WS_BUFFER_SIZE) {
request->send(429);
} else {
_ticket[index].ip = ip;
_ticket[index].timestamp = now;
request->send(200, "text/plain", "OK");
}
}
bool _wsAuth(AsyncWebSocketClient * client) {
IPAddress ip = client->remoteIP();
unsigned long now = millis();
unsigned short index = 0;
for (index = 0; index < WS_BUFFER_SIZE; index++) {
if ((_ticket[index].ip == ip) && (now - _ticket[index].timestamp < WS_TIMEOUT)) break;
}
if (index == WS_BUFFER_SIZE) {
DEBUG_MSG_P(PSTR("[WEBSOCKET] Validation check failed\n"));
wsSend_P(client->id(), PSTR("{\"message\": 10}"));
return false;
}
return true;
}
// -----------------------------------------------------------------------------
#if MQTT_SUPPORT
void _wsMQTTCallback(unsigned int type, const char * topic, const char * payload) {
if (type == MQTT_CONNECT_EVENT) wsSend_P(PSTR("{\"mqttStatus\": true}"));
if (type == MQTT_DISCONNECT_EVENT) wsSend_P(PSTR("{\"mqttStatus\": false}"));
}
#endif
bool _wsStore(String key, String value) {
// HTTP port
if (key == "webPort") {
if ((value.toInt() == 0) || (value.toInt() == 80)) {
return delSetting(key);
}
}
if (value != getSetting(key)) {
return setSetting(key, value);
}
return false;
}
bool _wsStore(String key, JsonArray& value) {
bool changed = false;
unsigned char index = 0;
for (auto element : value) {
if (_wsStore(key + index, element.as<String>())) changed = true;
index++;
}
// Delete further values
for (unsigned char i=index; i<SETTINGS_MAX_LIST_COUNT; i++) {
if (!delSetting(key, index)) break;
changed = true;
}
return changed;
}
void _wsParse(AsyncWebSocketClient *client, uint8_t * payload, size_t length) {
//DEBUG_MSG_P(PSTR("[WEBSOCKET] Parsing: %s\n"), length ? (char*) payload : "");
// Get client ID
uint32_t client_id = client->id();
// Parse JSON input
DynamicJsonBuffer jsonBuffer;
JsonObject& root = jsonBuffer.parseObject((char *) payload);
if (!root.success()) {
DEBUG_MSG_P(PSTR("[WEBSOCKET] Error parsing data\n"));
wsSend_P(client_id, PSTR("{\"message\": 3}"));
return;
}
// Check actions -----------------------------------------------------------
const char* action = root["action"];
if (action) {
DEBUG_MSG_P(PSTR("[WEBSOCKET] Requested action: %s\n"), action);
if (strcmp(action, "reboot") == 0) {
deferredReset(100, CUSTOM_RESET_WEB);
return;
}
if (strcmp(action, "reconnect") == 0) {
_web_defer.once_ms(100, wifiDisconnect);
return;
}
if (strcmp(action, "factory_reset") == 0) {
DEBUG_MSG_P(PSTR("\n\nFACTORY RESET\n\n"));
resetSettings();
deferredReset(100, CUSTOM_RESET_FACTORY);
return;
}
JsonObject& data = root["data"];
if (data.success()) {
// Callbacks
for (unsigned char i = 0; i < _ws_on_action_callbacks.size(); i++) {
(_ws_on_action_callbacks[i])(client_id, action, data);
}
// Restore configuration via websockets
if (strcmp(action, "restore") == 0) {
if (settingsRestoreJson(data)) {
wsSend_P(client_id, PSTR("{\"message\": 5}"));
} else {
wsSend_P(client_id, PSTR("{\"message\": 4}"));
}
}
return;
}
};
// Check configuration -----------------------------------------------------
JsonObject& config = root["config"];
if (config.success()) {
DEBUG_MSG_P(PSTR("[WEBSOCKET] Parsing configuration data\n"));
String adminPass;
bool save = false;
#if MQTT_SUPPORT
bool changedMQTT = false;
#endif
for (auto kv: config) {
bool changed = false;
String key = kv.key;
JsonVariant& value = kv.value;
// Check password
if (key == "adminPass") {
if (!value.is<JsonArray&>()) continue;
JsonArray& values = value.as<JsonArray&>();
if (values.size() != 2) continue;
if (values[0].as<String>().equals(values[1].as<String>())) {
String password = values[0].as<String>();
if (password.length() > 0) {
setSetting(key, password);
save = true;
wsSend_P(client_id, PSTR("{\"action\": \"reload\"}"));
}
} else {
wsSend_P(client_id, PSTR("{\"message\": 7}"));
}
continue;
}
// Check if key has to be processed
if (!settingsKeyExists(key.c_str())) {
delSetting(key);
continue;
}
// Store values
if (value.is<JsonArray&>()) {
if (_wsStore(key, value.as<JsonArray&>())) changed = true;
} else {
if (_wsStore(key, value.as<String>())) changed = true;
}
// Update flags if value has changed
if (changed) {
save = true;
#if MQTT_SUPPORT
if (key.startsWith("mqtt")) changedMQTT = true;
#endif
}
}
// Save settings
if (save) {
// Callbacks
espurnaReload();
// This should got to callback as well
// but first change management has to be in place
#if MQTT_SUPPORT
if (changedMQTT) mqttReset();
#endif
// Persist settings
saveSettings();
wsSend_P(client_id, PSTR("{\"message\": 8}"));
} else {
wsSend_P(client_id, PSTR("{\"message\": 9}"));
}
}
}
void _wsUpdate(JsonObject& root) {
root["heap"] = getFreeHeap();
root["uptime"] = getUptime();
root["rssi"] = WiFi.RSSI();
root["loadaverage"] = systemLoadAverage();
#if ADC_MODE_VALUE == ADC_VCC
root["vcc"] = ESP.getVcc();
#endif
#if NTP_SUPPORT
if (ntpSynced()) root["now"] = now();
#endif
}
bool _wsKeyCheck(const char * key) {
return (strncmp(key, "ws", 2) == 0);
}
void _wsOnStart(JsonObject& root) {
unsigned char web_mode = webMode();
root["webMode"] = web_mode;
if (WEB_MODE_NORMAL == web_mode) {
char chipid[7];
snprintf_P(chipid, sizeof(chipid), PSTR("%06X"), ESP.getChipId());
uint8_t * bssid = WiFi.BSSID();
char bssid_str[20];
snprintf_P(bssid_str, sizeof(bssid_str),
PSTR("%02X:%02X:%02X:%02X:%02X:%02X"),
bssid[0], bssid[1], bssid[2], bssid[3], bssid[4], bssid[5]
);
root["app_name"] = APP_NAME;
root["app_version"] = APP_VERSION;
root["app_build"] = buildTime();
#if defined(APP_REVISION)
root["app_revision"] = APP_REVISION;
#endif
root["manufacturer"] = getManufacturer();
root["chipid"] = String(chipid);
root["mac"] = WiFi.macAddress();
root["bssid"] = String(bssid_str);
root["channel"] = WiFi.channel();
root["device"] = getBoardName();
root["hostname"] = getHostname();
root["network"] = getNetwork();
root["deviceip"] = getIP();
root["sketch_size"] = ESP.getSketchSize();
root["free_size"] = ESP.getFreeSketchSpace();
root["sdk"] = ESP.getSdkVersion();
root["core"] = getCoreVersion();
_wsUpdate(root);
root["wsAuth"] = getSetting("wsAuth", WS_AUTHENTICATION).toInt() == 1;
#if TERMINAL_SUPPORT
root["cmdVisible"] = 1;
#endif
}
}
void _wsStart(uint32_t client_id) {
for (unsigned char i = 0; i < _ws_on_send_callbacks.size(); i++) {
wsSend(client_id, _ws_on_send_callbacks[i]);
}
}
void _wsEvent(AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len){
if (type == WS_EVT_CONNECT) {
#ifndef NOWSAUTH
if (!_wsAuth(client)) return;
#endif
IPAddress ip = client->remoteIP();
DEBUG_MSG_P(PSTR("[WEBSOCKET] #%u connected, ip: %d.%d.%d.%d, url: %s\n"), client->id(), ip[0], ip[1], ip[2], ip[3], server->url());
_wsStart(client->id());
client->_tempObject = new WebSocketIncommingBuffer(&_wsParse, true);
wifiReconnectCheck();
} else if(type == WS_EVT_DISCONNECT) {
DEBUG_MSG_P(PSTR("[WEBSOCKET] #%u disconnected\n"), client->id());
if (client->_tempObject) {
delete (WebSocketIncommingBuffer *) client->_tempObject;
}
wifiReconnectCheck();
} else if(type == WS_EVT_ERROR) {
DEBUG_MSG_P(PSTR("[WEBSOCKET] #%u error(%u): %s\n"), client->id(), *((uint16_t*)arg), (char*)data);
} else if(type == WS_EVT_PONG) {
DEBUG_MSG_P(PSTR("[WEBSOCKET] #%u pong(%u): %s\n"), client->id(), len, len ? (char*) data : "");
} else if(type == WS_EVT_DATA) {
//DEBUG_MSG_P(PSTR("[WEBSOCKET] #%u data(%u): %s\n"), client->id(), len, len ? (char*) data : "");
WebSocketIncommingBuffer *buffer = (WebSocketIncommingBuffer *)client->_tempObject;
AwsFrameInfo * info = (AwsFrameInfo*)arg;
buffer->data_event(client, info, data, len);
}
}
void _wsLoop() {
static unsigned long last = 0;
if (!wsConnected()) return;
if (millis() - last > WS_UPDATE_INTERVAL) {
last = millis();
wsSend(_wsUpdate);
}
}
// -----------------------------------------------------------------------------
// Public API
// -----------------------------------------------------------------------------
bool wsConnected() {
return (_ws.count() > 0);
}
void wsOnSendRegister(ws_on_send_callback_f callback) {
_ws_on_send_callbacks.push_back(callback);
}
void wsOnActionRegister(ws_on_action_callback_f callback) {
_ws_on_action_callbacks.push_back(callback);
}
void wsSend(ws_on_send_callback_f callback) {
if (_ws.count() > 0) {
DynamicJsonBuffer jsonBuffer;
JsonObject& root = jsonBuffer.createObject();
callback(root);
String output;
root.printTo(output);
jsonBuffer.clear();
_ws.textAll((char *) output.c_str());
}
}
void wsSend(const char * payload) {
if (_ws.count() > 0) {
_ws.textAll(payload);
}
}
void wsSend_P(PGM_P payload) {
if (_ws.count() > 0) {
char buffer[strlen_P(payload)];
strcpy_P(buffer, payload);
_ws.textAll(buffer);
}
}
void wsSend(uint32_t client_id, ws_on_send_callback_f callback) {
DynamicJsonBuffer jsonBuffer;
JsonObject& root = jsonBuffer.createObject();
callback(root);
String output;
root.printTo(output);
jsonBuffer.clear();
_ws.text(client_id, (char *) output.c_str());
}
void wsSend(uint32_t client_id, const char * payload) {
_ws.text(client_id, payload);
}
void wsSend_P(uint32_t client_id, PGM_P payload) {
char buffer[strlen_P(payload)];
strcpy_P(buffer, payload);
_ws.text(client_id, buffer);
}
void wsSetup() {
_ws.onEvent(_wsEvent);
webServer()->addHandler(&_ws);
// CORS
#ifdef WEB_REMOTE_DOMAIN
DefaultHeaders::Instance().addHeader("Access-Control-Allow-Origin", WEB_REMOTE_DOMAIN);
DefaultHeaders::Instance().addHeader("Access-Control-Allow-Credentials", "true");
#endif
webServer()->on("/auth", HTTP_GET, _onAuth);
#if MQTT_SUPPORT
mqttRegister(_wsMQTTCallback);
#endif
wsOnSendRegister(_wsOnStart);
settingsRegisterKeyCheck(_wsKeyCheck);
espurnaRegisterLoop(_wsLoop);
}
#endif // WEB_SUPPORT