feat: HTTP server with REST API for current/history/settings

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-17 21:15:16 +07:00
parent ea0256a5b9
commit 396688cd98
4 changed files with 96 additions and 0 deletions
@@ -8,6 +8,7 @@
 #include "history.h"
 #include "app_settings.h"
 #include "net.h"
+#include "web_server.h"
 #include "state.h"

 AppState g_state;
@@ -67,10 +68,15 @@ void setup() {
  sampleNow();
  historyAdd(rtcEpoch(), g_state.mslHpa, g_state.tempC);
  displayRender(g_state);
+
+  webBegin();
+  if (netConnected()) Serial.printf("Web UI: http://%s/\n", netIP().c_str());
+
  tSample = tHistory = tFlush = millis();
 }

 void loop() {
+  webLoop();
  unsigned long now = millis();

  if (now - tSample >= SAMPLE_INTERVAL_MS) {
@@ -0,0 +1,3 @@
+#pragma once
+#include <Arduino.h>
+static const char INDEX_HTML[] PROGMEM = "<!doctype html><meta charset=utf-8><title>Weather Predictor</title><h1>Weather Predictor</h1><p>See <a href=/api/current>/api/current</a></p>";
@@ -0,0 +1,84 @@
+#include <ESP8266WebServer.h>
+#include <ArduinoJson.h>
+#include "state.h"
+#include "app_settings.h"
+#include "history.h"
+#include "forecast.h"
+#include "web_page.h"
+
+static ESP8266WebServer server(80);
+
+static void handleRoot() {
+  server.send_P(200, "text/html", INDEX_HTML);
+}
+
+static void handleCurrent() {
+  JsonDocument doc;
+  char t[24];
+  snprintf(t, sizeof(t), "%04u-%02u-%02u %02u:%02u:%02u",
+           g_state.now.year, g_state.now.month, g_state.now.day,
+           g_state.now.hour, g_state.now.minute, g_state.now.second);
+  doc["time"]      = t;
+  doc["abs"]       = g_state.absHpa;
+  doc["msl"]       = g_state.mslHpa;
+  doc["temp"]      = g_state.tempC;
+  doc["trend"]     = (int)g_state.trend;
+  doc["haveTrend"] = g_state.haveTrend;
+  doc["forecast"]  = g_state.haveTrend ? g_state.forecast.text : "Collecting data...";
+  doc["category"]  = g_state.haveTrend ? categoryShort(g_state.forecast.category) : "...";
+  String out;
+  serializeJson(doc, out);
+  server.send(200, "application/json", out);
+}
+
+static void handleHistory() {
+  JsonDocument doc;
+  JsonArray arr = doc.to<JsonArray>();
+  int n = historyCount();
+  for (int i = 0; i < n; i++) {
+    Sample s = historyGet(i);
+    JsonObject o = arr.add<JsonObject>();
+    o["t"]    = s.epoch;
+    o["msl"]  = s.mslHpa;
+    o["temp"] = s.tempC;
+  }
+  String out;
+  serializeJson(doc, out);
+  server.send(200, "application/json", out);
+}
+
+static void handleGetSettings() {
+  JsonDocument doc;
+  doc["altitude"] = settings.altitudeM;
+  doc["tz"]       = settings.tzOffsetMin;
+  doc["lat"]      = settings.lat;
+  doc["lon"]      = settings.lon;
+  String out;
+  serializeJson(doc, out);
+  server.send(200, "application/json", out);
+}
+
+static void handlePostSettings() {
+  JsonDocument doc;
+  if (deserializeJson(doc, server.arg("plain"))) {
+    server.send(400, "application/json", "{\"ok\":false,\"err\":\"bad json\"}");
+    return;
+  }
+  settings.altitudeM   = doc["altitude"] | settings.altitudeM;
+  settings.tzOffsetMin = doc["tz"]       | settings.tzOffsetMin;
+  settings.lat         = doc["lat"]      | settings.lat;
+  settings.lon         = doc["lon"]      | settings.lon;
+  settingsSave();
+  server.send(200, "application/json", "{\"ok\":true}");
+}
+
+void webBegin() {
+  server.on("/", handleRoot);
+  server.on("/api/current", handleCurrent);
+  server.on("/api/history", handleHistory);
+  server.on("/api/settings", HTTP_GET,  handleGetSettings);
+  server.on("/api/settings", HTTP_POST, handlePostSettings);
+  server.begin();
+}
+
+void webLoop() { server.handleClient(); }
@@ -0,0 +1,3 @@
+#pragma once
+void webBegin();
+void webLoop();