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748 lines
21 KiB
748 lines
21 KiB
/*
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WEBSOCKET MODULE
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Copyright (C) 2016-2019 by Xose Pérez <xose dot perez at gmail dot com>
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*/
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#include "ws.h"
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#if WEB_SUPPORT
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#include <vector>
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#include "system.h"
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#include "ntp.h"
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#include "utils.h"
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#include "web.h"
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#include "wifi.h"
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#include "ws_internal.h"
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#include "libs/WebSocketIncommingBuffer.h"
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AsyncWebSocket _ws("/ws");
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// -----------------------------------------------------------------------------
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// Periodic updates
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// -----------------------------------------------------------------------------
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uint32_t _ws_last_update = 0;
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void _wsResetUpdateTimer() {
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_ws_last_update = millis() + WS_UPDATE_INTERVAL;
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}
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void _wsUpdate(JsonObject& root) {
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root["heap"] = systemFreeHeap();
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root["uptime"] = systemUptime();
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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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} else {
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root["vcc"] = "N/A (TOUT) ";
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}
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#if NTP_SUPPORT
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// XXX: arduinojson default config stores:
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// - double as float
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// - int64_t as int32_t
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// Simply send the string...
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if (ntpSynced()) {
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auto info = ntpInfo();
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constexpr size_t TimeSize { sizeof(time_t) };
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const char* const fmt = (TimeSize == 8) ? "%lld" : "%ld";
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char buffer[TimeSize * 4];
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sprintf(buffer, fmt, info.now);
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root["now"] = String(buffer);
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root["nowString"] = info.utc;
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root["nowLocalString"] = info.local.length()
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? info.local
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: info.utc;
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}
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#endif
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}
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void _wsDoUpdate(const bool connected) {
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if (!connected) return;
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if (millis() - _ws_last_update > WS_UPDATE_INTERVAL) {
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_ws_last_update = millis();
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wsSend(_wsUpdate);
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}
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}
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// -----------------------------------------------------------------------------
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// WS callbacks
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// -----------------------------------------------------------------------------
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std::queue<WsPostponedCallbacks> _ws_queue;
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ws_callbacks_t _ws_callbacks;
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void wsPost(uint32_t client_id, ws_on_send_callback_f&& cb) {
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_ws_queue.emplace(client_id, std::move(cb));
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}
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void wsPost(ws_on_send_callback_f&& cb) {
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wsPost(0, std::move(cb));
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}
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void wsPost(uint32_t client_id, const ws_on_send_callback_f& cb) {
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_ws_queue.emplace(client_id, cb);
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}
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void wsPost(const ws_on_send_callback_f& cb) {
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wsPost(0, cb);
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}
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template <typename T>
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void _wsPostCallbacks(uint32_t client_id, T&& cbs, WsPostponedCallbacks::Mode mode) {
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_ws_queue.emplace(client_id, std::forward<T>(cbs), mode);
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}
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void wsPostAll(uint32_t client_id, ws_on_send_callback_list_t&& cbs) {
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_wsPostCallbacks(client_id, std::move(cbs), WsPostponedCallbacks::Mode::All);
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}
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void wsPostAll(ws_on_send_callback_list_t&& cbs) {
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wsPostAll(0, std::move(cbs));
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}
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void wsPostAll(uint32_t client_id, const ws_on_send_callback_list_t& cbs) {
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_wsPostCallbacks(client_id, cbs, WsPostponedCallbacks::Mode::All);
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}
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void wsPostAll(const ws_on_send_callback_list_t& cbs) {
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wsPostAll(0, cbs);
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}
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void wsPostSequence(uint32_t client_id, ws_on_send_callback_list_t&& cbs) {
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_wsPostCallbacks(client_id, std::move(cbs), WsPostponedCallbacks::Mode::Sequence);
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}
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void wsPostSequence(ws_on_send_callback_list_t&& cbs) {
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wsPostSequence(0, std::move(cbs));
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}
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void wsPostSequence(uint32_t client_id, const ws_on_send_callback_list_t& cbs) {
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_wsPostCallbacks(client_id, cbs, WsPostponedCallbacks::Mode::Sequence);
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}
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void wsPostSequence(const ws_on_send_callback_list_t& cbs) {
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wsPostSequence(0, cbs);
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}
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// -----------------------------------------------------------------------------
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ws_callbacks_t& ws_callbacks_t::onVisible(ws_on_send_callback_f cb) {
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on_visible.push_back(cb);
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return *this;
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}
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ws_callbacks_t& ws_callbacks_t::onConnected(ws_on_send_callback_f cb) {
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on_connected.push_back(cb);
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return *this;
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}
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ws_callbacks_t& ws_callbacks_t::onData(ws_on_send_callback_f cb) {
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on_data.push_back(cb);
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return *this;
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}
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ws_callbacks_t& ws_callbacks_t::onAction(ws_on_action_callback_f cb) {
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on_action.push_back(cb);
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return *this;
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}
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ws_callbacks_t& ws_callbacks_t::onKeyCheck(ws_on_keycheck_callback_f cb) {
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on_keycheck.push_back(cb);
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return *this;
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}
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// -----------------------------------------------------------------------------
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// WS authentication
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// -----------------------------------------------------------------------------
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constexpr size_t WsMaxClients { WS_MAX_CLIENTS };
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WsTicket _ws_tickets[WsMaxClients];
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void _onAuth(AsyncWebServerRequest* request) {
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webLog(request);
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if (!webAuthenticate(request)) {
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return request->requestAuthentication();
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}
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IPAddress ip = request->client()->remoteIP();
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unsigned long now = millis();
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size_t index;
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for (index = 0; index < WsMaxClients; ++index) {
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if (_ws_tickets[index].ip == ip) break;
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if (_ws_tickets[index].timestamp == 0) break;
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if (now - _ws_tickets[index].timestamp > WS_TIMEOUT) break;
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}
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if (index == WS_MAX_CLIENTS) {
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request->send(429);
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} else {
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_ws_tickets[index].ip = ip;
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_ws_tickets[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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void _wsAuthUpdate(AsyncWebSocketClient* client) {
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IPAddress ip = client->remoteIP();
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for (auto& ticket : _ws_tickets) {
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if (ticket.ip == ip) {
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ticket.timestamp = millis();
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break;
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}
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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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for (auto& ticket : _ws_tickets) {
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if (ticket.ip == ip) {
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if (now - ticket.timestamp < WS_TIMEOUT) {
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return true;
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}
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return false;
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}
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}
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return false;
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}
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// -----------------------------------------------------------------------------
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// Debug
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// -----------------------------------------------------------------------------
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#if DEBUG_WEB_SUPPORT
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constexpr size_t WsDebugMessagesMax = 8;
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WsDebug _ws_debug(WsDebugMessagesMax);
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void WsDebug::send(bool connected) {
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if (!connected && _flush) {
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clear();
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return;
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}
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if (!_flush) return;
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// ref: http://arduinojson.org/v5/assistant/
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// {"weblog": {"msg":[...],"pre":[...]}}
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DynamicJsonBuffer jsonBuffer(2*JSON_ARRAY_SIZE(_messages.size()) + JSON_OBJECT_SIZE(1) + JSON_OBJECT_SIZE(2));
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JsonObject& root = jsonBuffer.createObject();
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JsonObject& weblog = root.createNestedObject("weblog");
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JsonArray& msg_array = weblog.createNestedArray("msg");
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JsonArray& pre_array = weblog.createNestedArray("pre");
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for (auto& msg : _messages) {
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pre_array.add(msg.first.c_str());
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msg_array.add(msg.second.c_str());
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}
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wsSend(root);
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clear();
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}
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bool wsDebugSend(const char* prefix, const char* message) {
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if (wifiConnected() && wsConnected()) {
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_ws_debug.add(prefix, message);
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return true;
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}
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return false;
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}
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#endif
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// Check the existing setting before saving it
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// TODO: this should know of the default values, somehow?
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// TODO: move webPort handling somewhere else?
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bool _wsStore(const String& key, const String& value) {
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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 (!hasSetting(key) || 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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// -----------------------------------------------------------------------------
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// Store indexed key (key0, key1, etc.) from array
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// -----------------------------------------------------------------------------
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bool _wsStore(const String& key, JsonArray& values) {
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bool changed = false;
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unsigned char index = 0;
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for (auto& element : values) {
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const auto value = element.as<String>();
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auto setting = SettingsKey {key, index};
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if (!hasSetting(setting) || value != getSetting(setting)) {
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setSetting(setting, value);
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changed = true;
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}
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++index;
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}
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// Delete further values
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for (unsigned char next_index=index; next_index < SETTINGS_MAX_LIST_COUNT; ++next_index) {
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if (!delSetting({key, next_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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bool _wsCheckKey(const String& key, JsonVariant& value) {
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for (auto& callback : _ws_callbacks.on_keycheck) {
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if (callback(key.c_str(), value)) return true;
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// TODO: remove this to call all OnKeyCheckCallbacks with the
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// current key/value
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}
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return false;
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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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// Check early for empty object / nothing
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if ((length == 0) || (length == 1)) {
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return;
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}
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if ((length == 3) && (strcmp((char*) payload, "{}") == 0)) {
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return;
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}
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// Parse JSON input
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// TODO: json buffer should be pretty efficient with the non-const payload,
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// most of the space is taken by the object key references
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DynamicJsonBuffer jsonBuffer(512);
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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] JSON parsing error\n"));
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wsSend_P(client_id, PSTR("{\"message\": \"Cannot parse the data!\"}"));
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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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if (strcmp(action, "ping") == 0) {
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wsSend_P(client_id, PSTR("{\"pong\": 1}"));
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_wsAuthUpdate(client);
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return;
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}
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if (strcmp(action, "reboot") == 0) {
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deferredReset(100, CustomResetReason::Web);
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return;
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}
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if (strcmp(action, "reconnect") == 0) {
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static Ticker timer;
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timer.once_ms_scheduled(100, []() {
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wifiDisconnect();
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yield();
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});
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return;
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}
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if (strcmp(action, "factory_reset") == 0) {
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factoryReset();
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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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if (strcmp(action, "restore") == 0) {
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if (settingsRestoreJson(data)) {
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wsSend_P(client_id, PSTR("{\"message\": \"Changes saved, you should be able to reboot now.\"}"));
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} else {
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wsSend_P(client_id, PSTR("{\"message\": \"Could not restore the configuration, see the debug log for more information.\"}"));
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}
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return;
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}
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for (auto& callback : _ws_callbacks.on_action) {
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callback(client_id, action, data);
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}
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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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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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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\": \"Passwords do not match!\"}"));
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}
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continue;
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}
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#if NTP_SUPPORT
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else if (key == "ntpTZ") {
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_wsResetUpdateTimer();
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}
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#endif
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if (!_wsCheckKey(key, value)) {
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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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}
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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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espurnaReload();
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// Persist settings
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saveSettings();
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wsSend_P(client_id, PSTR("{\"saved\": true, \"message\": \"Changes saved.\"}"));
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} else {
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wsSend_P(client_id, PSTR("{\"message\": \"No changes detected.\"}"));
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}
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}
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}
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bool _wsOnKeyCheck(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, "desc", 4) == 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 _wsOnConnected(JsonObject& root) {
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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"] = getVersion().c_str();
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root["app_build"] = buildTime();
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root["device"] = getDevice().c_str();
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root["manufacturer"] = getManufacturer().c_str();
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root["chipid"] = getChipId().c_str();
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root["mac"] = WiFi.macAddress();
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root["bssid"] = WiFi.BSSIDstr();
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root["channel"] = WiFi.channel();
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root["hostname"] = getSetting("hostname");
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root["desc"] = getSetting("desc");
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root["network"] = wifiStaSsid();
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root["deviceip"] = wifiStaIp().toString();
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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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root["webPort"] = getSetting("webPort", WEB_PORT);
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root["wsAuth"] = getSetting("wsAuth", 1 == WS_AUTHENTICATION);
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}
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void _wsConnected(uint32_t client_id) {
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const bool changePassword = (USE_PASSWORD && WEB_FORCE_PASS_CHANGE)
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? getAdminPass().equals(ADMIN_PASS)
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: false;
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if (changePassword) {
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StaticJsonBuffer<JSON_OBJECT_SIZE(1)> jsonBuffer;
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JsonObject& root = jsonBuffer.createObject();
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root["webMode"] = WEB_MODE_PASSWORD;
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wsSend(client_id, root);
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return;
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}
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wsPostAll(client_id, _ws_callbacks.on_visible);
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wsPostSequence(client_id, _ws_callbacks.on_connected);
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wsPostSequence(client_id, _ws_callbacks.on_data);
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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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client->_tempObject = nullptr;
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String ip = client->remoteIP().toString();
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#ifndef NOWSAUTH
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if (!_wsAuth(client)) {
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wsSend_P(client->id(), PSTR("{\"action\": \"reload\", \"message\": \"Session expired.\"}"));
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DEBUG_MSG_P(PSTR("[WEBSOCKET] #%u session expired for %s\n"), client->id(), ip.c_str());
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client->close();
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return;
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}
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#endif
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|
|
|
DEBUG_MSG_P(PSTR("[WEBSOCKET] #%u connected, ip: %s, url: %s\n"), client->id(), ip.c_str(), server->url());
|
|
_wsConnected(client->id());
|
|
_wsResetUpdateTimer();
|
|
client->_tempObject = new WebSocketIncommingBuffer(_wsParse, true);
|
|
|
|
} else if(type == WS_EVT_DISCONNECT) {
|
|
DEBUG_MSG_P(PSTR("[WEBSOCKET] #%u disconnected\n"), client->id());
|
|
if (client->_tempObject) {
|
|
delete (WebSocketIncommingBuffer *) client->_tempObject;
|
|
}
|
|
wifiApCheck();
|
|
|
|
} 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 : "");
|
|
if (!client->_tempObject) return;
|
|
WebSocketIncommingBuffer *buffer = (WebSocketIncommingBuffer *)client->_tempObject;
|
|
AwsFrameInfo * info = (AwsFrameInfo*)arg;
|
|
buffer->data_event(client, info, data, len);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// TODO: make this generic loop method to queue important ws messages?
|
|
// or, if something uses ticker / async ctx to send messages,
|
|
// it needs a retry mechanism built into the callback object
|
|
void _wsHandlePostponedCallbacks(bool connected) {
|
|
|
|
if (!connected && !_ws_queue.empty()) {
|
|
_ws_queue.pop();
|
|
return;
|
|
}
|
|
|
|
if (_ws_queue.empty()) return;
|
|
auto& callbacks = _ws_queue.front();
|
|
|
|
// avoid stalling forever when can't send anything
|
|
constexpr decltype(ESP.getCycleCount()) WsQueueTimeoutClockCycles = microsecondsToClockCycles(10 * 1000 * 1000); // 10s
|
|
if (ESP.getCycleCount() - callbacks.timestamp > WsQueueTimeoutClockCycles) {
|
|
_ws_queue.pop();
|
|
return;
|
|
}
|
|
|
|
// client_id == 0 means we need to send the message to every client
|
|
if (callbacks.client_id) {
|
|
AsyncWebSocketClient* ws_client = _ws.client(callbacks.client_id);
|
|
|
|
// ...but, we need to check if client is still connected
|
|
if (!ws_client) {
|
|
_ws_queue.pop();
|
|
return;
|
|
}
|
|
|
|
// wait until we can send the next batch of messages
|
|
// XXX: enforce that callbacks send only one message per iteration
|
|
if (ws_client->queueIsFull()) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
// XXX: block allocation will try to create *2 next time,
|
|
// likely failing and causing wsSend to reference empty objects
|
|
// XXX: arduinojson6 will not do this, but we may need to use per-callback buffers
|
|
constexpr size_t WsQueueJsonBufferSize = 3192;
|
|
DynamicJsonBuffer jsonBuffer(WsQueueJsonBufferSize);
|
|
JsonObject& root = jsonBuffer.createObject();
|
|
|
|
callbacks.send(root);
|
|
if (callbacks.client_id) {
|
|
wsSend(callbacks.client_id, root);
|
|
} else {
|
|
wsSend(root);
|
|
}
|
|
yield();
|
|
|
|
if (callbacks.done()) {
|
|
_ws_queue.pop();
|
|
}
|
|
}
|
|
|
|
void _wsLoop() {
|
|
const bool connected = wsConnected();
|
|
_wsDoUpdate(connected);
|
|
_wsHandlePostponedCallbacks(connected);
|
|
#if DEBUG_WEB_SUPPORT
|
|
_ws_debug.send(connected);
|
|
#endif
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// Public API
|
|
// -----------------------------------------------------------------------------
|
|
|
|
bool wsConnected() {
|
|
return (_ws.count() > 0);
|
|
}
|
|
|
|
bool wsConnected(uint32_t client_id) {
|
|
return _ws.hasClient(client_id);
|
|
}
|
|
|
|
ws_callbacks_t& wsRegister() {
|
|
return _ws_callbacks;
|
|
}
|
|
|
|
void wsSend(JsonObject& root) {
|
|
// Note: 'measurement' tries to serialize json contents byte-by-byte,
|
|
// which is somewhat costly, but likely unavoidable for us.
|
|
size_t len = root.measureLength();
|
|
AsyncWebSocketMessageBuffer* buffer = _ws.makeBuffer(len);
|
|
|
|
if (buffer) {
|
|
root.printTo(reinterpret_cast<char*>(buffer->get()), len + 1);
|
|
_ws.textAll(buffer);
|
|
}
|
|
}
|
|
|
|
void wsSend(uint32_t client_id, JsonObject& root) {
|
|
AsyncWebSocketClient* client = _ws.client(client_id);
|
|
if (client == nullptr) return;
|
|
|
|
size_t len = root.measureLength();
|
|
AsyncWebSocketMessageBuffer* buffer = _ws.makeBuffer(len);
|
|
|
|
if (buffer) {
|
|
root.printTo(reinterpret_cast<char*>(buffer->get()), len + 1);
|
|
client->text(buffer);
|
|
}
|
|
}
|
|
|
|
void wsSend(ws_on_send_callback_f callback) {
|
|
if (_ws.count() > 0) {
|
|
DynamicJsonBuffer jsonBuffer(512);
|
|
JsonObject& root = jsonBuffer.createObject();
|
|
callback(root);
|
|
|
|
wsSend(root);
|
|
}
|
|
}
|
|
|
|
void wsSend(const char * payload) {
|
|
if (_ws.count() > 0) {
|
|
_ws.textAll(payload);
|
|
}
|
|
}
|
|
|
|
void wsSend_P(const char* 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) {
|
|
AsyncWebSocketClient* client = _ws.client(client_id);
|
|
if (client == nullptr) return;
|
|
|
|
DynamicJsonBuffer jsonBuffer(512);
|
|
JsonObject& root = jsonBuffer.createObject();
|
|
callback(root);
|
|
wsSend(client_id, root);
|
|
}
|
|
|
|
void wsSend(uint32_t client_id, const char * payload) {
|
|
_ws.text(client_id, payload);
|
|
}
|
|
|
|
void wsSend_P(uint32_t client_id, const char* payload) {
|
|
char buffer[strlen_P(payload)];
|
|
strcpy_P(buffer, payload);
|
|
_ws.text(client_id, buffer);
|
|
}
|
|
|
|
void wsSetup() {
|
|
|
|
_ws.onEvent(_wsEvent);
|
|
webServer().addHandler(&_ws);
|
|
|
|
// CORS
|
|
const String webDomain = getSetting("webDomain", WEB_REMOTE_DOMAIN);
|
|
DefaultHeaders::Instance().addHeader("Access-Control-Allow-Origin", webDomain);
|
|
if (!webDomain.equals("*")) {
|
|
DefaultHeaders::Instance().addHeader("Access-Control-Allow-Credentials", "true");
|
|
}
|
|
|
|
webServer().on("/auth", HTTP_GET, _onAuth);
|
|
|
|
wsRegister()
|
|
.onConnected(_wsOnConnected)
|
|
.onKeyCheck(_wsOnKeyCheck);
|
|
|
|
espurnaRegisterLoop(_wsLoop);
|
|
}
|
|
|
|
#endif // WEB_SUPPORT
|