chore: 并入 iotlcm-sms 历史到 sms/（原提交 1d38bc4）

sms/internal/httpapi/handler.go

@@ -0,0 +1,71 @@
+package httpapi
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"io"
+	"net/http"
+
+	"git.5iot.com/iotlcm-public/iotlcm-sms/internal/sms"
+)
+
+const maxRequestBody = 1 << 20
+
+type Sender interface {
+	Send(ctx context.Context, config sms.Config, message sms.Message) (sms.Result, error)
+}
+
+type SendRequest struct {
+	Config sms.Config  `json:"config"`
+	Params sms.Message `json:"params"`
+}
+
+type handler struct {
+	sender Sender
+}
+
+func NewHandler(sender Sender) http.Handler {
+	h := &handler{sender: sender}
+	mux := http.NewServeMux()
+	mux.HandleFunc("GET /healthz", h.health)
+	mux.HandleFunc("POST /api/v1/sms/send", h.send)
+	return mux
+}
+
+func (h *handler) health(w http.ResponseWriter, _ *http.Request) {
+	writeJSON(w, http.StatusOK, map[string]string{"status": "ok"})
+}
+
+func (h *handler) send(w http.ResponseWriter, r *http.Request) {
+	r.Body = http.MaxBytesReader(w, r.Body, maxRequestBody)
+	decoder := json.NewDecoder(r.Body)
+	decoder.DisallowUnknownFields()
+
+	var request SendRequest
+	if err := decoder.Decode(&request); err != nil {
+		writeJSON(w, http.StatusBadRequest, sms.Result{Code: 400, Message: "请求 JSON 无效: " + err.Error()})
+		return
+	}
+	if err := decoder.Decode(&struct{}{}); !errors.Is(err, io.EOF) {
+		writeJSON(w, http.StatusBadRequest, sms.Result{Code: 400, Message: "请求体只能包含一个 JSON 对象"})
+		return
+	}
+
+	result, err := h.sender.Send(r.Context(), request.Config, request.Params)
+	if err != nil {
+		status := http.StatusBadGateway
+		if errors.Is(err, sms.ErrInvalidRequest) || errors.Is(err, sms.ErrProviderNotFound) || errors.Is(err, sms.ErrSceneNotConfigured) {
+			status = http.StatusBadRequest
+		}
+		writeJSON(w, status, result)
+		return
+	}
+	writeJSON(w, http.StatusOK, result)
+}
+
+func writeJSON(w http.ResponseWriter, status int, value any) {
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	w.WriteHeader(status)
+	_ = json.NewEncoder(w).Encode(value)
+}