Launch

server_config_api.go

@@ -0,0 +1,117 @@
+package main
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"os"
+	"sync"
+)
+
+// Note: applyFullConfigReload is defined in hotreload.go
+
+// ---------- Global config holder ----------
+
+var (
+	globalCfgMu   sync.RWMutex
+	globalCfg     *Config
+	globalCfgPath string // set in main() from the -config flag
+
+	bannerMu          sync.RWMutex
+	currentBannerText string
+)
+
+func setGlobalCfg(c *Config) {
+	globalCfgMu.Lock()
+	globalCfg = c
+	globalCfgMu.Unlock()
+}
+
+func getGlobalCfg() *Config {
+	globalCfgMu.RLock()
+	defer globalCfgMu.RUnlock()
+	return globalCfg
+}
+
+func setBannerText(s string) {
+	bannerMu.Lock()
+	currentBannerText = s
+	bannerMu.Unlock()
+}
+
+func getBannerText() string {
+	bannerMu.RLock()
+	defer bannerMu.RUnlock()
+	return currentBannerText
+}
+
+// ---------- HTTP handler ----------
+
+// handleServerConfig dispatches GET (read) and POST (write) for /api/server/config.
+func handleServerConfig(w http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+	case http.MethodGet:
+		serverConfigGet(w, r)
+	case http.MethodPost:
+		serverConfigPost(w, r)
+	default:
+		w.WriteHeader(http.StatusMethodNotAllowed)
+	}
+}
+
+func serverConfigGet(w http.ResponseWriter, _ *http.Request) {
+	if globalCfgPath == "" {
+		http.Error(w, "config path not set", http.StatusInternalServerError)
+		return
+	}
+	data, err := os.ReadFile(globalCfgPath)
+	if err != nil {
+		http.Error(w, "failed to read config: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	_, _ = w.Write(data)
+}
+
+func serverConfigPost(w http.ResponseWriter, r *http.Request) {
+	if globalCfgPath == "" {
+		http.Error(w, "config path not set", http.StatusInternalServerError)
+		return
+	}
+	body, err := io.ReadAll(io.LimitReader(r.Body, 512*1024))
+	if err != nil {
+		http.Error(w, "failed to read body", http.StatusBadRequest)
+		return
+	}
+	var newCfg Config
+	if err := json.Unmarshal(body, &newCfg); err != nil {
+		http.Error(w, "invalid JSON: "+err.Error(), http.StatusBadRequest)
+		return
+	}
+	if newCfg.Listen == "" {
+		http.Error(w, "listen address required", http.StatusBadRequest)
+		return
+	}
+
+	// Preserve file-based users array (not editable through the UI).
+	globalCfgMu.RLock()
+	if globalCfg != nil {
+		newCfg.Users = globalCfg.Users
+	}
+	globalCfgMu.RUnlock()
+
+	out, err := json.MarshalIndent(newCfg, "", "  ")
+	if err != nil {
+		http.Error(w, "marshal error", http.StatusInternalServerError)
+		return
+	}
+	if err := os.WriteFile(globalCfgPath, out, 0o644); err != nil {
+		http.Error(w, "failed to write config: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	// Apply all changes live — no restart needed.
+	applyFullConfigReload(&newCfg)
+
+	w.WriteHeader(http.StatusOK)
+}