Initial commit: Go DNS microservice boilerplate

internal/handler/dns.go

@@ -0,0 +1,41 @@
+package handler
+
+import (
+	"encoding/json"
+	"log/slog"
+	"net/http"
+
+	"github.com/vectordns/server/internal/dns"
+)
+
+func DNSLookup(w http.ResponseWriter, r *http.Request) {
+	var req dns.LookupRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid request body", "INVALID_BODY")
+		return
+	}
+
+	if req.Domain == "" {
+		writeError(w, http.StatusBadRequest, "domain is required", "MISSING_DOMAIN")
+		return
+	}
+
+	resp, err := dns.Lookup(req)
+	if err != nil {
+		slog.Error("dns lookup failed", "domain", req.Domain, "error", err)
+		writeError(w, http.StatusInternalServerError, "dns lookup failed", "LOOKUP_FAILED")
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(resp)
+}
+
+func writeError(w http.ResponseWriter, status int, msg, code string) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(status)
+	json.NewEncoder(w).Encode(map[string]string{
+		"error": msg,
+		"code":  code,
+	})
+}

internal/handler/health.go

@@ -0,0 +1,14 @@
+package handler
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+func Health(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(map[string]string{
+		"status":  "ok",
+		"version": "0.1.0",
+	})
+}