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