新增 POST /api/devices/:id/inference/options,讓已燒錄的模型不重燒
即可切換 detection/classification 與更換 label。
KL520 一次只能載一個模型(換模型必須重燒),但解析方式與 label 都
只是後處理與顯示層,不碰 NPU,因此可即時生效。
- JSON: {taskType?, labels?};multipart: taskType + labelFile
- 欄位用指標型別以區分「省略 = 不動」與「labels:[] = 清空」
- label 解析器(internal/labelfile):格式 <index> <名稱>
略過空行與 # 註解、trim CRLF、名稱含空白只 split 第一個空白、
index 非整數/負數/重複則整檔拒絕並回報行號、稀疏 index 補空字串
- index 上限 4095、檔案上限 256KB,防記憶體耗盡
- 非法 taskType 一律拒絕(含舊別名 detection),因為 bridge 對無法
辨識的值是靜默 fallback,忽略會回 200 但用錯解析方式
- 走窄能力介面 InferenceOptionsDriver,不動 DeviceDriver 簽章
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
536 lines
16 KiB
Go
536 lines
16 KiB
Go
package handlers
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"net/http"
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"os"
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"path/filepath"
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"runtime"
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"strings"
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"time"
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"visiona-local/server/internal/api/ws"
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"visiona-local/server/internal/device"
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"visiona-local/server/internal/driver"
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"visiona-local/server/internal/flash"
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"visiona-local/server/internal/inference"
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"visiona-local/server/internal/labelfile"
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"github.com/gin-gonic/gin"
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)
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// udevRuleInstalled checks if the Kneron udev rule is installed on Linux.
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func udevRuleInstalled() bool {
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_, err := os.Stat("/etc/udev/rules.d/99-kneron.rules")
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return err == nil
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}
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type DeviceHandler struct {
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deviceMgr *device.Manager
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flashSvc *flash.Service
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inferenceSvc *inference.Service
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wsHub *ws.Hub
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// fwHandler 提供 firmware 衍生欄位 helper(M9-3);可為 nil(test / 環境
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// 無 firmware bundle 時)、此時 4 個 firmware 衍生欄位用 fallback 空值。
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fwHandler *FirmwareHandler
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}
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func NewDeviceHandler(
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deviceMgr *device.Manager,
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flashSvc *flash.Service,
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inferenceSvc *inference.Service,
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wsHub *ws.Hub,
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) *DeviceHandler {
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return &DeviceHandler{
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deviceMgr: deviceMgr,
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flashSvc: flashSvc,
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inferenceSvc: inferenceSvc,
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wsHub: wsHub,
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}
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}
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// SetFirmwareHandler 注入 firmware handler 給 device handler 用、避免
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// 構造函式 signature 破壞性變更(既有 caller 不需更新)。
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func (h *DeviceHandler) SetFirmwareHandler(fw *FirmwareHandler) {
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h.fwHandler = fw
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}
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// deviceWithFirmware 是回給前端的 DeviceInfo 加 firmware 衍生欄位
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// (TDD §3.1 line 131)。embedded driver.DeviceInfo 確保既有欄位 JSON
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// 平坦展開、與 FirmwareDerivedFields 同層、不破壞既有 frontend client。
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//
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// Reviewer M9-3 第 1 輪 Major-1 修正:FirmwareDerivedFields 不再含
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// `firmwareVer` 鍵。Frontend 直接讀 driver.DeviceInfo 既有的
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// `firmwareVersion` 鍵(見 driver/interface.go DeviceInfo.FirmwareVer)。
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// 兩鍵原本指向同一個 firmware 字串、會讓 frontend 困惑哪個是 SoT。
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type deviceWithFirmware struct {
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driver.DeviceInfo
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FirmwareDerivedFields
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}
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// enrichDevices 把 device list 包上 firmware 衍生欄位。fwHandler 為 nil 時
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// 仍回原始 list(衍生欄位走預設 zero value)、不阻塞 list endpoint。
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func (h *DeviceHandler) enrichDevices(devices []driver.DeviceInfo) []deviceWithFirmware {
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out := make([]deviceWithFirmware, 0, len(devices))
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for _, d := range devices {
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entry := deviceWithFirmware{DeviceInfo: d}
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if h.fwHandler != nil {
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entry.FirmwareDerivedFields = h.fwHandler.DeriveFirmwareFields(d.Type, d.FirmwareVer)
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} else {
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// fwHandler 缺省 fallback:衍生欄位用 zero value(前端會看到
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// canUpgrade=false / isLegacy=false / bundled="unknown"、合理)。
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// firmware 字串 frontend 直接從 d.FirmwareVer (JSON 鍵 firmwareVersion)
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// 讀、不在這裡複製。
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entry.FirmwareDerivedFields = FirmwareDerivedFields{
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BundledFirmwareVersion: "unknown",
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}
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}
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out = append(out, entry)
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}
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return out
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}
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func (h *DeviceHandler) ScanDevices(c *gin.Context) {
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devices := h.deviceMgr.Rescan()
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resp := gin.H{
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// M9-3:附加 firmware 衍生欄位(firmwareVer / firmwareIsLegacy /
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// firmwareCanUpgrade / bundledFirmwareVersion)讓前端決定是否顯示
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// 升級按鈕。enrichDevices 在 fwHandler=nil 時仍回有用內容。
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"devices": h.enrichDevices(devices),
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}
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// Linux: 0 裝置 + udev rule 不存在 → 提示使用者安裝 USB 權限
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if runtime.GOOS == "linux" && len(devices) == 0 && !udevRuleInstalled() {
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resp["udevHint"] = true
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}
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c.JSON(200, gin.H{"success": true, "data": resp})
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}
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func (h *DeviceHandler) ListDevices(c *gin.Context) {
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devices := h.deviceMgr.ListDevices()
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resp := gin.H{
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"devices": h.enrichDevices(devices),
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}
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if runtime.GOOS == "linux" && len(devices) == 0 && !udevRuleInstalled() {
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resp["udevHint"] = true
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}
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c.JSON(200, gin.H{"success": true, "data": resp})
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}
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func (h *DeviceHandler) GetDevice(c *gin.Context) {
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id := c.Param("id")
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session, err := h.deviceMgr.GetDevice(id)
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if err != nil {
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c.JSON(404, gin.H{
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"success": false,
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"error": gin.H{"code": "DEVICE_NOT_FOUND", "message": err.Error()},
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})
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return
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}
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c.JSON(200, gin.H{"success": true, "data": session.Driver.Info()})
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}
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func (h *DeviceHandler) ConnectDevice(c *gin.Context) {
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id := c.Param("id")
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// KL520 USB Boot flow now includes mandatory reset + firmware reload on
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// first connect (required for inference to work — see kl720_driver.go
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// needsReset block). Worst-case path on Windows: Loader-mode reconnect
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// retry (16s) + firmware load (~31s) + reboot wait + second reconnect
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// (~13s) = ~60-65s. Use 120s to leave headroom and avoid spurious 504s.
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ctx, cancel := context.WithTimeout(c.Request.Context(), 120*time.Second)
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defer cancel()
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errCh := make(chan error, 1)
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go func() {
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errCh <- h.deviceMgr.Connect(id)
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}()
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select {
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case err := <-errCh:
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if err != nil {
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c.JSON(400, gin.H{
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"success": false,
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"error": gin.H{"code": "CONNECT_FAILED", "message": err.Error()},
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})
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return
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}
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c.JSON(200, gin.H{"success": true})
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case <-ctx.Done():
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c.JSON(504, gin.H{
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"success": false,
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"error": gin.H{"code": "CONNECT_TIMEOUT", "message": fmt.Sprintf("device connect timed out after 60s for %s", id)},
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})
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}
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}
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func (h *DeviceHandler) DisconnectDevice(c *gin.Context) {
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id := c.Param("id")
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if err := h.deviceMgr.Disconnect(id); err != nil {
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c.JSON(400, gin.H{
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"success": false,
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"error": gin.H{"code": "DISCONNECT_FAILED", "message": err.Error()},
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})
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return
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}
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c.JSON(200, gin.H{"success": true})
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}
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func (h *DeviceHandler) FlashDevice(c *gin.Context) {
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id := c.Param("id")
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// 燒錄只需要 modelId。推論種類一律用 models.json 宣告的值;要改解析方式
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// 走 POST /devices/:id/inference/options(推論期即時切換、不必重燒)。
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var req struct {
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ModelID string `json:"modelId"`
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}
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if err := c.ShouldBindJSON(&req); err != nil {
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c.JSON(400, gin.H{
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"success": false,
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"error": gin.H{"code": "BAD_REQUEST", "message": "modelId is required"},
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})
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return
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}
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taskID, progressCh, err := h.flashSvc.StartFlash(id, req.ModelID)
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if err != nil {
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c.JSON(400, gin.H{
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"success": false,
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"error": gin.H{"code": "FLASH_FAILED", "message": err.Error()},
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})
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return
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}
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// Forward progress to WebSocket, then cleanup task (M2 fix)
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go func() {
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room := "flash:" + id
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for progress := range progressCh {
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h.wsHub.BroadcastToRoom(room, progress)
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}
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h.flashSvc.CleanupTask(taskID)
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}()
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c.JSON(200, gin.H{"success": true, "data": gin.H{"taskId": taskID}})
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}
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// InferenceOptionsDriver 是「支援推論期切換解析方式」的 driver 能力介面。
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//
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// 為什麼不直接加進 driver.DeviceDriver:那是所有 driver 都必須實作的最小
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// 契約,加一個 Kneron 特有能力進去,三個既有 test fake 全都要跟著改,而它們
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// 跟這個功能完全無關。用窄介面 + type assert 是這個 repo 已建立的做法
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// (見 firmware.UpgradeDriver / DeviceManagerAdapter.GetUpgradeDriver)。
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type InferenceOptionsDriver interface {
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SetInferenceOptions(opts driver.InferenceOptions) error
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}
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// inferenceOptionsRequest 是 JSON 形式的 request body。
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//
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// 兩個欄位都是指標,因為必須區分「沒帶這個欄位」與「帶了空值」:
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//
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// Labels == nil → 不動 label 表
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// Labels == &[]string{} → 清空 label 表(回到原始 enum)
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//
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// 用非指標 []string 的話 JSON 的 `null`、`[]` 與「欄位不存在」會全部塌成
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// nil,「清空」這個合法意圖就永遠表達不出來。
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type inferenceOptionsRequest struct {
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TaskType *string `json:"taskType"`
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Labels *[]string `json:"labels"`
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}
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// SetInferenceOptions 在不重新燒錄的前提下,更新當前已載入模型的解析方式
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// 與 label 表。
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//
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// POST /api/devices/:id/inference/options
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//
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// 支援兩種 content type:
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//
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// application/json — {"taskType": "...", "labels": [...]}
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// multipart/form-data — taskType 欄位 + labelFile 檔案(`<index> <名稱>`)
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//
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// 刻意不做任何持久化:使用者明確要求「不用記,每次現場傳」。設定只存在於
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// 當前 bridge session,disconnect / reset / 重新 flash 都會清掉。
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func (h *DeviceHandler) SetInferenceOptions(c *gin.Context) {
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id := c.Param("id")
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session, err := h.deviceMgr.GetDevice(id)
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if err != nil {
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c.JSON(404, gin.H{
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"success": false,
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"error": gin.H{"code": "DEVICE_NOT_FOUND", "message": err.Error()},
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})
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return
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}
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optsDrv, ok := session.Driver.(InferenceOptionsDriver)
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if !ok {
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c.JSON(400, gin.H{
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"success": false,
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"error": gin.H{
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"code": "UNSUPPORTED_DEVICE",
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"message": "this device driver does not support runtime inference options",
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},
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})
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return
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}
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opts, labelInfo, apiErr := parseInferenceOptionsRequest(c)
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if apiErr != nil {
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c.JSON(apiErr.status, gin.H{"success": false, "error": apiErr.body()})
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return
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}
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if err := optsDrv.SetInferenceOptions(opts); err != nil {
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c.JSON(400, gin.H{
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"success": false,
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"error": gin.H{"code": "INFERENCE_OPTIONS_FAILED", "message": err.Error()},
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})
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return
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}
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data := gin.H{
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"deviceId": id,
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"taskType": opts.TaskType,
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}
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if opts.Labels != nil {
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data["labelCount"] = labelInfo.namedCount
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data["labels"] = opts.Labels
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if len(opts.Labels) > 0 {
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data["maxIndex"] = len(opts.Labels) - 1
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}
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}
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c.JSON(200, gin.H{"success": true, "data": data})
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}
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// apiError 讓 parse 階段能同時回「HTTP status + 錯誤碼 + 可選的行號」。
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type apiError struct {
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status int
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code string
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message string
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// line 為 label 檔解析失敗的行號;0 表示與行號無關、不放進回應。
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line int
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}
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func (e *apiError) body() gin.H {
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h := gin.H{"code": e.code, "message": e.message}
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if e.line > 0 {
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h["line"] = e.line
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}
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return h
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}
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// labelSummary 帶回 handler 要回報給前端的 label 統計。
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type labelSummary struct {
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// namedCount 是實際有名稱的筆數(不含稀疏補洞的空字串)。
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namedCount int
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}
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// parseInferenceOptionsRequest 從 JSON 或 multipart 取出設定並完整驗證。
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func parseInferenceOptionsRequest(c *gin.Context) (driver.InferenceOptions, labelSummary, *apiError) {
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var opts driver.InferenceOptions
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var summary labelSummary
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contentType := c.ContentType()
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if strings.HasPrefix(contentType, "multipart/form-data") {
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var err *apiError
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opts, summary, err = parseMultipartInferenceOptions(c)
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if err != nil {
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return opts, summary, err
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}
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} else {
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var req inferenceOptionsRequest
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if bindErr := c.ShouldBindJSON(&req); bindErr != nil {
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return opts, summary, &apiError{
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status: 400,
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code: "BAD_REQUEST",
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message: "invalid JSON body: " + bindErr.Error(),
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}
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}
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if req.TaskType != nil {
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opts.TaskType = *req.TaskType
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}
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if req.Labels != nil {
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// 顯式給了 labels(含空陣列)→ 一律送出。空陣列 = 清空,
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// 必須與「沒帶欄位」區分開。
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labels := *req.Labels
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if labels == nil {
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labels = []string{}
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}
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if len(labels) > labelfile.MaxIndex+1 {
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return opts, summary, &apiError{
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status: 400,
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code: "LABEL_TOO_LARGE",
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message: fmt.Sprintf("labels 筆數 %d 超過上限 %d", len(labels), labelfile.MaxIndex+1),
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}
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}
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opts.Labels = labels
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summary.namedCount = countNamedLabels(labels)
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}
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}
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// taskType 值域用 flash.IsValidTaskTypeOverride —— 這裡是目前唯一讓使用者
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// 指定解析方式的入口(燒錄時不再選,一律用 models.json 宣告值)。舊別名
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// detection 一樣拒絕 —— bridge 收得下,但不讓兩套命名同時出現在 wire 上(R-4)。
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if opts.TaskType != "" && !flash.IsValidTaskTypeOverride(opts.TaskType) {
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return opts, summary, &apiError{
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status: 400,
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code: "VALIDATION_ERROR",
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message: fmt.Sprintf("invalid taskType %q: must be %s or %s",
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opts.TaskType, flash.TaskTypeObjectDetection, flash.TaskTypeClassification),
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}
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}
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// 兩者都沒帶 = 呼叫端沒表達任何意圖。回 200 等於假裝做了事,正是這個
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// 功能要防的靜默失敗,所以擋在這裡。
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if opts.TaskType == "" && opts.Labels == nil {
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return opts, summary, &apiError{
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status: 400,
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code: "BAD_REQUEST",
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message: "至少要提供 taskType 或 labels 其中一項",
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}
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}
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return opts, summary, nil
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}
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// parseMultipartInferenceOptions 處理 multipart 上傳(taskType 欄位 + labelFile 檔案)。
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func parseMultipartInferenceOptions(c *gin.Context) (driver.InferenceOptions, labelSummary, *apiError) {
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var opts driver.InferenceOptions
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var summary labelSummary
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// 限制 multipart 在記憶體中的暫存量;超過的部分 gin 會落地成暫存檔,
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// 但真正的防線是下方的 header.Size 檢查。
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if err := c.Request.ParseMultipartForm(labelfile.MaxFileSize); err != nil {
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return opts, summary, &apiError{
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status: 400,
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code: "BAD_REQUEST",
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message: "invalid multipart form: " + err.Error(),
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}
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}
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opts.TaskType = c.PostForm("taskType")
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file, header, err := c.Request.FormFile("labelFile")
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if err != nil {
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// 沒有檔案是合法的(只切 taskType)。其他錯誤才算壞請求。
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if errors.Is(err, http.ErrMissingFile) {
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return opts, summary, nil
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}
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return opts, summary, &apiError{
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status: 400,
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code: "BAD_REQUEST",
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message: "failed to read labelFile: " + err.Error(),
|
||
}
|
||
}
|
||
defer file.Close()
|
||
|
||
// 大小上限在讀取「之前」擋,不能讀完再判斷 —— 那時記憶體已經吃掉了。
|
||
if header.Size > labelfile.MaxFileSize {
|
||
return opts, summary, &apiError{
|
||
status: 400,
|
||
code: "LABEL_TOO_LARGE",
|
||
message: fmt.Sprintf("標籤檔過大(%d bytes),上限為 %d bytes",
|
||
header.Size, labelfile.MaxFileSize),
|
||
}
|
||
}
|
||
|
||
// 副檔名檢查純粹防呆(真正的防線是內容解析)。上傳檔名只用來看副檔名,
|
||
// 不參與任何路徑組合 —— 本 endpoint 不落地存檔,沒有路徑穿越面。
|
||
ext := strings.ToLower(filepath.Ext(header.Filename))
|
||
if ext != "" && ext != ".txt" && ext != ".names" {
|
||
return opts, summary, &apiError{
|
||
status: 400,
|
||
code: "BAD_REQUEST",
|
||
message: "標籤檔僅支援 .txt / .names",
|
||
}
|
||
}
|
||
|
||
// LimitReader 是 header.Size 之外的第二道防線:Content-Length 可以造假,
|
||
// 實際串流長度才是真的。多讀 1 byte 用來偵測「宣稱小、其實大」。
|
||
data, readErr := io.ReadAll(io.LimitReader(file, labelfile.MaxFileSize+1))
|
||
if readErr != nil {
|
||
return opts, summary, &apiError{
|
||
status: 400,
|
||
code: "BAD_REQUEST",
|
||
message: "failed to read labelFile: " + readErr.Error(),
|
||
}
|
||
}
|
||
if len(data) > labelfile.MaxFileSize {
|
||
return opts, summary, &apiError{
|
||
status: 400,
|
||
code: "LABEL_TOO_LARGE",
|
||
message: fmt.Sprintf("標籤檔過大,上限為 %d bytes", labelfile.MaxFileSize),
|
||
}
|
||
}
|
||
|
||
result, parseErr := labelfile.Parse(data)
|
||
if parseErr != nil {
|
||
var pe *labelfile.ParseError
|
||
if errors.As(parseErr, &pe) {
|
||
return opts, summary, &apiError{
|
||
status: 400,
|
||
code: "LABEL_PARSE_ERROR",
|
||
message: pe.Error(),
|
||
line: pe.Line,
|
||
}
|
||
}
|
||
return opts, summary, &apiError{
|
||
status: 400,
|
||
code: "LABEL_PARSE_ERROR",
|
||
message: parseErr.Error(),
|
||
}
|
||
}
|
||
|
||
opts.Labels = result.Labels
|
||
summary.namedCount = result.LabelCount
|
||
return opts, summary, nil
|
||
}
|
||
|
||
// countNamedLabels 算出實際有名稱的筆數(稀疏補洞的空字串不計)。
|
||
func countNamedLabels(labels []string) int {
|
||
n := 0
|
||
for _, l := range labels {
|
||
if strings.TrimSpace(l) != "" {
|
||
n++
|
||
}
|
||
}
|
||
return n
|
||
}
|
||
|
||
func (h *DeviceHandler) StartInference(c *gin.Context) {
|
||
id := c.Param("id")
|
||
resultCh := make(chan *driver.InferenceResult, 10)
|
||
|
||
if err := h.inferenceSvc.Start(id, resultCh); err != nil {
|
||
c.JSON(400, gin.H{
|
||
"success": false,
|
||
"error": gin.H{"code": "INFERENCE_ERROR", "message": err.Error()},
|
||
})
|
||
return
|
||
}
|
||
|
||
// Forward results to WebSocket, enriching with device ID
|
||
go func() {
|
||
room := "inference:" + id
|
||
for result := range resultCh {
|
||
result.DeviceID = id
|
||
h.wsHub.BroadcastToRoom(room, result)
|
||
}
|
||
}()
|
||
|
||
c.JSON(200, gin.H{"success": true})
|
||
}
|
||
|
||
func (h *DeviceHandler) StopInference(c *gin.Context) {
|
||
id := c.Param("id")
|
||
if err := h.inferenceSvc.Stop(id); err != nil {
|
||
c.JSON(400, gin.H{
|
||
"success": false,
|
||
"error": gin.H{"code": "INFERENCE_ERROR", "message": err.Error()},
|
||
})
|
||
return
|
||
}
|
||
c.JSON(200, gin.H{"success": true})
|
||
}
|