75 lines
2.5 KiB
Go
75 lines
2.5 KiB
Go
package http
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import (
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"net/http"
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roomv1 "hyapp/api/proto/room/v1"
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"hyapp/pkg/idgen"
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"hyapp/services/gateway-service/internal/auth"
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"hyapp/services/gateway-service/internal/client"
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)
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// Handler 是 gateway 的 HTTP transport adapter。
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// 它只依赖跨服务 client，不持有房间状态，也不直接实现房间命令语义。
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type Handler struct {
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roomClient client.RoomClient
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userClient client.UserAuthClient
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userIdentityClient client.UserIdentityClient
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}
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// NewHandler 装配 gateway HTTP handler 的内部依赖。
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func NewHandler(roomClient client.RoomClient, userClient ...client.UserAuthClient) *Handler {
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handler := &Handler{roomClient: roomClient}
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if len(userClient) > 0 {
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handler.userClient = userClient[0]
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}
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return handler
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}
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// NewHandlerWithClients 装配完整 gateway HTTP handler。
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// 保留 NewHandler 是为了不破坏只测 room/auth transport 的旧测试构造。
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func NewHandlerWithClients(roomClient client.RoomClient, userClient client.UserAuthClient, userIdentityClient client.UserIdentityClient) *Handler {
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return &Handler{
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roomClient: roomClient,
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userClient: userClient,
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userIdentityClient: userIdentityClient,
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}
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}
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// meta 把外部 HTTP 请求上下文转换成 room-service 命令元信息。
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// 当前 gateway 只生成命令入口所需的最小追踪字段，状态版本和幂等落点由 room-service 负责。
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func meta(request *http.Request, roomID string) *roomv1.RequestMeta {
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return &roomv1.RequestMeta{
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RequestId: requestIDFromContext(request.Context()),
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CommandId: idgen.New("cmd"),
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ActorUserId: auth.UserIDFromContext(request.Context()),
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RoomId: roomID,
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GatewayNodeId: "gateway-local",
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SessionId: idgen.New("sess"),
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SentAtMs: 0,
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}
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}
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// decode 统一处理 HTTP JSON 入参解析失败分支。
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// gateway 在这里拒绝非法 JSON，不做房间业务校验，避免把 Room Cell 规则复制到入口层。
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func decode(writer http.ResponseWriter, request *http.Request, out any) bool {
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if err := decodeJSON(request.Body, out); err != nil {
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writeError(writer, request, http.StatusBadRequest, codeInvalidJSON, "invalid request body")
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return false
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}
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return true
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}
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// write 统一把内部 gRPC 调用结果转换为 HTTP JSON 响应。
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// 首版不在 gateway 细分 gRPC 错误码，避免入口层提前耦合 room-service 的业务错误模型。
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func write(writer http.ResponseWriter, request *http.Request, body any, err error) {
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if err != nil {
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writeRPCError(writer, request, err)
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return
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}
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writeOK(writer, request, body)
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}
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