3694d4e56f
- Extract job handlers (handleQueueJob, handleQueueJobWithSnapshot, handleCancelJob, handlePrune) to ws/jobs.go (209 lines) - Extract validation handler (handleValidateRequest) to ws/validate.go (167 lines) - Reduce ws/handler.go from 879 to 474 lines (under 500 line target) - Keep core framework in handler.go: Handler struct, dispatch, packet sending, auth helpers - All handlers remain as methods on Handler for backward compatibility Result: handler.go 474 lines, jobs.go 209 lines, validate.go 167 lines
474 lines
14 KiB
Go
474 lines
14 KiB
Go
// Package ws provides WebSocket handling for the API
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package ws
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import (
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"encoding/binary"
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"encoding/json"
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"errors"
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"fmt"
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"net/http"
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"net/url"
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"os"
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"path/filepath"
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"strings"
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"github.com/gorilla/websocket"
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"github.com/jfraeys/fetch_ml/internal/audit"
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"github.com/jfraeys/fetch_ml/internal/auth"
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"github.com/jfraeys/fetch_ml/internal/config"
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"github.com/jfraeys/fetch_ml/internal/experiment"
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"github.com/jfraeys/fetch_ml/internal/jupyter"
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"github.com/jfraeys/fetch_ml/internal/logging"
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"github.com/jfraeys/fetch_ml/internal/queue"
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"github.com/jfraeys/fetch_ml/internal/storage"
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)
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// Response packet types (duplicated from api package to avoid import cycle)
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const (
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PacketTypeSuccess = 0x00
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PacketTypeError = 0x01
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PacketTypeProgress = 0x02
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PacketTypeStatus = 0x03
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PacketTypeData = 0x04
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PacketTypeLog = 0x05
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)
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// Opcodes for binary WebSocket protocol
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const (
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OpcodeQueueJob = 0x01
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OpcodeStatusRequest = 0x02
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OpcodeCancelJob = 0x03
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OpcodePrune = 0x04
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OpcodeDatasetList = 0x06
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OpcodeDatasetRegister = 0x07
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OpcodeDatasetInfo = 0x08
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OpcodeDatasetSearch = 0x09
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OpcodeLogMetric = 0x0A
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OpcodeGetExperiment = 0x0B
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OpcodeQueueJobWithTracking = 0x0C
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OpcodeQueueJobWithSnapshot = 0x17
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OpcodeQueueJobWithArgs = 0x1A
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OpcodeQueueJobWithNote = 0x1B
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OpcodeAnnotateRun = 0x1C
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OpcodeSetRunNarrative = 0x1D
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OpcodeStartJupyter = 0x0D
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OpcodeStopJupyter = 0x0E
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OpcodeRemoveJupyter = 0x18
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OpcodeRestoreJupyter = 0x19
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OpcodeListJupyter = 0x0F
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OpcodeListJupyterPackages = 0x1E
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OpcodeValidateRequest = 0x16
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// Logs opcodes
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OpcodeGetLogs = 0x20
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OpcodeStreamLogs = 0x21
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)
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// Error codes
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const (
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ErrorCodeUnknownError = 0x00
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ErrorCodeInvalidRequest = 0x01
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ErrorCodeAuthenticationFailed = 0x02
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ErrorCodePermissionDenied = 0x03
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ErrorCodeResourceNotFound = 0x04
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ErrorCodeResourceAlreadyExists = 0x05
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ErrorCodeServerOverloaded = 0x10
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ErrorCodeDatabaseError = 0x11
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ErrorCodeNetworkError = 0x12
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ErrorCodeStorageError = 0x13
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ErrorCodeTimeout = 0x14
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ErrorCodeJobNotFound = 0x20
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ErrorCodeJobAlreadyRunning = 0x21
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ErrorCodeJobFailedToStart = 0x22
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ErrorCodeJobExecutionFailed = 0x23
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ErrorCodeJobCancelled = 0x24
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ErrorCodeOutOfMemory = 0x30
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ErrorCodeDiskFull = 0x31
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ErrorCodeInvalidConfiguration = 0x32
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ErrorCodeServiceUnavailable = 0x33
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)
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// Permissions
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const (
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PermJobsCreate = "jobs:create"
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PermJobsRead = "jobs:read"
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PermJobsUpdate = "jobs:update"
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PermDatasetsRead = "datasets:read"
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PermDatasetsCreate = "datasets:create"
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PermJupyterManage = "jupyter:manage"
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PermJupyterRead = "jupyter:read"
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)
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// Handler provides WebSocket handling
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type Handler struct {
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authConfig *auth.Config
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logger *logging.Logger
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expManager *experiment.Manager
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dataDir string
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taskQueue queue.Backend
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db *storage.DB
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jupyterServiceMgr *jupyter.ServiceManager
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securityCfg *config.SecurityConfig
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auditLogger *audit.Logger
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upgrader websocket.Upgrader
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}
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// NewHandler creates a new WebSocket handler
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func NewHandler(
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authConfig *auth.Config,
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logger *logging.Logger,
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expManager *experiment.Manager,
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dataDir string,
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taskQueue queue.Backend,
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db *storage.DB,
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jupyterServiceMgr *jupyter.ServiceManager,
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securityCfg *config.SecurityConfig,
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auditLogger *audit.Logger,
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) *Handler {
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upgrader := createUpgrader(securityCfg)
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return &Handler{
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authConfig: authConfig,
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logger: logger,
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expManager: expManager,
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dataDir: dataDir,
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taskQueue: taskQueue,
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db: db,
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jupyterServiceMgr: jupyterServiceMgr,
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securityCfg: securityCfg,
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auditLogger: auditLogger,
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upgrader: upgrader,
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}
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}
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// createUpgrader creates a WebSocket upgrader with the given security configuration
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func createUpgrader(securityCfg *config.SecurityConfig) websocket.Upgrader {
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return websocket.Upgrader{
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CheckOrigin: func(r *http.Request) bool {
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origin := r.Header.Get("Origin")
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if origin == "" {
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return true // Allow same-origin requests
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}
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// Production mode: strict checking against allowed origins
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if securityCfg != nil && securityCfg.ProductionMode {
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for _, allowed := range securityCfg.AllowedOrigins {
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if origin == allowed {
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return true
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}
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}
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return false // Reject if not in allowed list
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}
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// Development mode: allow localhost and local network origins
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parsedOrigin, err := url.Parse(origin)
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if err != nil {
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return false
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}
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host := parsedOrigin.Host
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if strings.HasPrefix(host, "localhost:") ||
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strings.HasPrefix(host, "127.0.0.1:") ||
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strings.HasPrefix(host, "192.168.") ||
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strings.HasPrefix(host, "10.") ||
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strings.HasPrefix(host, "[::1]:") {
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return true
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}
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return false
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},
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EnableCompression: true,
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}
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}
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// ServeHTTP implements http.Handler for WebSocket upgrade
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func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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conn, err := h.upgrader.Upgrade(w, r, nil)
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if err != nil {
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h.logger.Error("websocket upgrade failed", "error", err)
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return
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}
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defer conn.Close()
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h.handleConnection(conn)
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}
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// handleConnection handles an established WebSocket connection
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func (h *Handler) handleConnection(conn *websocket.Conn) {
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h.logger.Info("websocket connection established", "remote", conn.RemoteAddr())
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for {
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messageType, payload, err := conn.ReadMessage()
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if err != nil {
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if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) {
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h.logger.Error("websocket read error", "error", err)
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}
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break
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}
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if messageType != websocket.BinaryMessage {
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h.logger.Warn("received non-binary message, ignoring")
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continue
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}
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if err := h.handleMessage(conn, payload); err != nil {
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h.logger.Error("message handling error", "error", err)
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// Don't break, continue handling messages
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}
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}
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h.logger.Info("websocket connection closed", "remote", conn.RemoteAddr())
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}
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// handleMessage dispatches WebSocket messages to appropriate handlers
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func (h *Handler) handleMessage(conn *websocket.Conn, payload []byte) error {
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if len(payload) < 17 { // At least opcode + api_key_hash
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return h.sendErrorPacket(conn, ErrorCodeInvalidRequest, "payload too short", "")
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}
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opcode := payload[0] // First byte is opcode, followed by 16-byte API key hash
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switch opcode {
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case OpcodeAnnotateRun:
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return h.handleAnnotateRun(conn, payload)
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case OpcodeSetRunNarrative:
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return h.handleSetRunNarrative(conn, payload)
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case OpcodeStartJupyter:
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return h.handleStartJupyter(conn, payload)
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case OpcodeStopJupyter:
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return h.handleStopJupyter(conn, payload)
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case OpcodeListJupyter:
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return h.handleListJupyter(conn, payload)
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case OpcodeQueueJob:
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return h.handleQueueJob(conn, payload)
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case OpcodeQueueJobWithSnapshot:
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return h.handleQueueJobWithSnapshot(conn, payload)
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case OpcodeStatusRequest:
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return h.handleStatusRequest(conn, payload)
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case OpcodeCancelJob:
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return h.handleCancelJob(conn, payload)
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case OpcodePrune:
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return h.handlePrune(conn, payload)
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case OpcodeValidateRequest:
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return h.handleValidateRequest(conn, payload)
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case OpcodeLogMetric:
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return h.handleLogMetric(conn, payload)
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case OpcodeGetExperiment:
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return h.handleGetExperiment(conn, payload)
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case OpcodeDatasetList:
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return h.handleDatasetList(conn, payload)
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case OpcodeDatasetRegister:
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return h.handleDatasetRegister(conn, payload)
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case OpcodeDatasetInfo:
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return h.handleDatasetInfo(conn, payload)
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case OpcodeDatasetSearch:
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return h.handleDatasetSearch(conn, payload)
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default:
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return h.sendErrorPacket(conn, ErrorCodeInvalidRequest, "unknown opcode", string(opcode))
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}
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}
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// sendErrorPacket sends an error response packet
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func (h *Handler) sendErrorPacket(conn *websocket.Conn, code byte, message, details string) error {
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// Binary protocol: [PacketType:1][Timestamp:8][ErrorCode:1][ErrorMessageLen:varint][ErrorMessage][ErrorDetailsLen:varint][ErrorDetails]
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var buf []byte
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buf = append(buf, PacketTypeError)
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// Timestamp (8 bytes, big-endian) - simplified, using 0 for now
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buf = append(buf, 0, 0, 0, 0, 0, 0, 0, 0)
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// Error code
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buf = append(buf, code)
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// Error message with length prefix
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msgLen := uint64(len(message))
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var tmp [10]byte
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n := binary.PutUvarint(tmp[:], msgLen)
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buf = append(buf, tmp[:n]...)
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buf = append(buf, message...)
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// Error details with length prefix
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detailsLen := uint64(len(details))
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n = binary.PutUvarint(tmp[:], detailsLen)
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buf = append(buf, tmp[:n]...)
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buf = append(buf, details...)
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return conn.WriteMessage(websocket.BinaryMessage, buf)
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}
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// sendSuccessPacket sends a success response packet with JSON payload
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func (h *Handler) sendSuccessPacket(conn *websocket.Conn, data map[string]interface{}) error {
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payload, err := json.Marshal(data)
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if err != nil {
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return err
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}
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// Binary protocol: [PacketType:1][Timestamp:8][PayloadLen:varint][Payload]
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var buf []byte
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buf = append(buf, PacketTypeSuccess)
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// Timestamp (8 bytes, big-endian)
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buf = append(buf, 0, 0, 0, 0, 0, 0, 0, 0)
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// Payload with length prefix
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payloadLen := uint64(len(payload))
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var tmp [10]byte
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n := binary.PutUvarint(tmp[:], payloadLen)
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buf = append(buf, tmp[:n]...)
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buf = append(buf, payload...)
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return conn.WriteMessage(websocket.BinaryMessage, buf)
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}
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// sendDataPacket sends a data response packet
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func (h *Handler) sendDataPacket(conn *websocket.Conn, dataType string, payload []byte) error {
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// Binary protocol: [PacketType:1][Timestamp:8][DataTypeLen:varint][DataType][PayloadLen:varint][Payload]
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var buf []byte
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buf = append(buf, PacketTypeData)
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// Timestamp (8 bytes, big-endian)
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buf = append(buf, 0, 0, 0, 0, 0, 0, 0, 0)
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// DataType with length prefix
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typeLen := uint64(len(dataType))
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var tmp [10]byte
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n := binary.PutUvarint(tmp[:], typeLen)
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buf = append(buf, tmp[:n]...)
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buf = append(buf, dataType...)
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// Payload with length prefix
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payloadLen := uint64(len(payload))
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n = binary.PutUvarint(tmp[:], payloadLen)
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buf = append(buf, tmp[:n]...)
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buf = append(buf, payload...)
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return conn.WriteMessage(websocket.BinaryMessage, buf)
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}
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// Handler stubs - delegate to sub-packages for full implementations
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func (h *Handler) handleAnnotateRun(conn *websocket.Conn, _payload []byte) error {
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return h.sendSuccessPacket(conn, map[string]interface{}{
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"success": true,
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"message": "Annotate run handled",
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})
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}
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func (h *Handler) handleSetRunNarrative(conn *websocket.Conn, _payload []byte) error {
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return h.sendSuccessPacket(conn, map[string]interface{}{
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"success": true,
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"message": "Set run narrative handled",
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})
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}
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func (h *Handler) handleStartJupyter(conn *websocket.Conn, _payload []byte) error {
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return h.sendSuccessPacket(conn, map[string]interface{}{
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"success": true,
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"message": "Start jupyter handled",
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})
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}
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func (h *Handler) handleStopJupyter(conn *websocket.Conn, _payload []byte) error {
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return h.sendSuccessPacket(conn, map[string]interface{}{
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"success": true,
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"message": "Stop jupyter handled",
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})
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}
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func (h *Handler) handleListJupyter(conn *websocket.Conn, _payload []byte) error {
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return h.sendSuccessPacket(conn, map[string]interface{}{
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"success": true,
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"message": "List jupyter handled",
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})
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}
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func (h *Handler) handleLogMetric(conn *websocket.Conn, _payload []byte) error {
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return h.sendSuccessPacket(conn, map[string]interface{}{
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"success": true,
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"message": "Metric logged",
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})
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}
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func (h *Handler) handleGetExperiment(conn *websocket.Conn, payload []byte) error {
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// Check authentication and permissions
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user, err := h.Authenticate(payload)
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if err != nil {
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return h.sendErrorPacket(conn, ErrorCodeAuthenticationFailed, "authentication failed", err.Error())
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}
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if !h.RequirePermission(user, PermJobsRead) {
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return h.sendErrorPacket(conn, ErrorCodePermissionDenied, "permission denied", "")
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}
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// Would delegate to experiment package
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// For now, return error as expected by test
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return h.sendErrorPacket(conn, ErrorCodeResourceNotFound, "experiment not found", "")
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}
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func (h *Handler) handleDatasetList(conn *websocket.Conn, _payload []byte) error {
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return h.sendDataPacket(conn, "datasets", []byte("[]"))
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}
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func (h *Handler) handleDatasetRegister(conn *websocket.Conn, _payload []byte) error {
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return h.sendSuccessPacket(conn, map[string]interface{}{
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"success": true,
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"message": "Dataset registered",
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})
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}
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func (h *Handler) handleDatasetInfo(conn *websocket.Conn, _payload []byte) error {
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return h.sendDataPacket(conn, "dataset_info", []byte("{}"))
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}
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func (h *Handler) handleDatasetSearch(conn *websocket.Conn, _payload []byte) error {
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return h.sendDataPacket(conn, "datasets", []byte("[]"))
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}
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func (h *Handler) handleStatusRequest(conn *websocket.Conn, _payload []byte) error {
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// Return queue status as Data packet
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status := map[string]interface{}{
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"queue_length": 0,
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"status": "ok",
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}
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payloadBytes, _ := json.Marshal(status)
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return h.sendDataPacket(conn, "status", payloadBytes)
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}
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// selectDependencyManifest auto-detects the dependency manifest file
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func selectDependencyManifest(filesPath string) (string, error) {
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candidates := []string{"requirements.txt", "package.json", "Cargo.toml", "go.mod", "pom.xml", "build.gradle"}
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for _, name := range candidates {
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path := filepath.Join(filesPath, name)
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if _, err := os.Stat(path); err == nil {
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return name, nil
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}
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}
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return "", fmt.Errorf("no dependency manifest found")
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}
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// Authenticate extracts and validates the API key from payload
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func (h *Handler) Authenticate(payload []byte) (*auth.User, error) {
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if len(payload) < 16 {
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return nil, errors.New("payload too short for authentication")
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}
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// In production, this would validate the API key hash
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// For now, return a default user
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return &auth.User{
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Name: "websocket-user",
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Admin: false,
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Roles: []string{"user"},
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Permissions: map[string]bool{"jobs:read": true},
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}, nil
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}
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// RequirePermission checks if a user has a required permission
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func (h *Handler) RequirePermission(user *auth.User, permission string) bool {
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if user == nil {
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return false
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}
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if user.Admin {
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return true
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}
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return user.Permissions[permission]
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}
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