Session middleware

context.go

@@ -0,0 +1,8 @@
+package middleware
+
+type ctxKey struct{}
+
+var (
+	requestIDKey ctxKey
+	sessionKey   ctxKey
+)

logger.go

@@ -15,9 +15,7 @@ func Logger(logger *slog.Logger) Middleware {
 				slog.String("proto", r.Proto),
 				slog.String("method", r.Method),
 				slog.String("request_uri", r.RequestURI),
-			}
-			if requestID != "" {
-				args = append(args, slog.String("request_id", requestID))
+				slog.String("request_id", requestID),
 			}
 			logger.InfoContext(
 				r.Context(),

recover.go

@@ -2,7 +2,6 @@ package middleware
 
 import (
 	"net/http"
-	"runtime/debug"
 
 	"log/slog"
 )
@@ -15,7 +14,6 @@ func Recover(logger *slog.Logger) Middleware {
 				if err == nil {
 					return
 				}
-				debug.PrintStack()
 				requestID := GetRequestID(r)
 				logger.ErrorContext(
 					r.Context(),

request_id.go

@@ -7,12 +7,7 @@ import (
 	"go.neonxp.ru/objectid"
 )
 
-type ctxKeyRequestID int
-
-const (
-	RequestIDKey    ctxKeyRequestID = 0
-	RequestIDHeader string          = "X-Request-ID"
-)
+const RequestIDHeader string = "X-Request-ID"
 
 func RequestID(next http.Handler) http.Handler {
 	objectid.Seed()
@@ -22,12 +17,12 @@ func RequestID(next http.Handler) http.Handler {
 			requestID = objectid.New().String()
 		}
 
-		next.ServeHTTP(w, r.WithContext(context.WithValue(r.Context(), RequestIDKey, requestID)))
+		next.ServeHTTP(w, r.WithContext(context.WithValue(r.Context(), requestIDKey, requestID)))
 	})
 }
 
 func GetRequestID(r *http.Request) string {
-	rid := r.Context().Value(RequestIDKey)
+	rid := r.Context().Value(requestIDKey)
 	if rid == nil {
 		return ""
 	}

session.go

@@ -0,0 +1,65 @@
+package middleware
+
+import (
+	"context"
+	"net/http"
+
+	"go.neonxp.ru/middleware/session"
+	"go.neonxp.ru/objectid"
+)
+
+type SessionConfig struct {
+	SessionCookie string
+	Path          string
+	Domain        string
+	Secure        bool
+	HttpOnly      bool
+	MaxAge        int
+}
+
+type SessionManager struct {
+	SessionID string
+	Storer    session.Store
+	MaxAge    int
+}
+
+func (s *SessionManager) Load(ctx context.Context) session.Value {
+	return s.Storer.Load(ctx, s.SessionID)
+}
+
+func (s *SessionManager) Save(ctx context.Context, value session.Value) error {
+	return s.Storer.Save(ctx, s.SessionID, value)
+}
+
+func (s *SessionManager) SetMaxAge(maxAge int) {
+	s.MaxAge = maxAge
+}
+
+func Session(config *SessionConfig, storer session.Store) Middleware {
+	return func(h http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			sessionID := objectid.New().String()
+			cookie, err := r.Cookie(config.SessionCookie)
+			if err == nil {
+				sessionID = cookie.Value
+			}
+			sessionManager := &SessionManager{SessionID: sessionID, Storer: storer, MaxAge: config.MaxAge}
+
+			h.ServeHTTP(w, r.WithContext(context.WithValue(r.Context(), sessionKey, &sessionManager)))
+
+			http.SetCookie(w, &http.Cookie{
+				Name:     config.SessionCookie,
+				Value:    sessionID,
+				Path:     config.Path,
+				Domain:   config.Domain,
+				Secure:   config.Secure,
+				HttpOnly: config.HttpOnly,
+				MaxAge:   sessionManager.MaxAge,
+			})
+		})
+	}
+}
+
+func SessionFromRequest(r *http.Request) *SessionManager {
+	return r.Context().Value(sessionKey).(*SessionManager)
+}

session/bbolt/bbolt.go

@@ -0,0 +1,61 @@
+package bbolt
+
+import (
+	"bytes"
+	"context"
+	"encoding/gob"
+	"log/slog"
+
+	"go.etcd.io/bbolt"
+	"go.neonxp.ru/middleware/session"
+)
+
+func New(db *bbolt.DB, bucketName []byte) session.Store {
+	return &Store{
+		db:         db,
+		bucketName: bucketName,
+	}
+}
+
+type Store struct {
+	db         *bbolt.DB
+	bucketName []byte
+}
+
+func (s *Store) Load(ctx context.Context, sessionID string) session.Value {
+	v := session.Value{}
+	err := s.db.View(func(tx *bbolt.Tx) error {
+		bucket := tx.Bucket(s.bucketName)
+		if bucket == nil {
+			// no bucket -- normal situation
+			return nil
+		}
+		vb := bucket.Get([]byte(sessionID))
+		if vb == nil {
+			// no session -- no error
+			return nil
+		}
+		rdr := bytes.NewBuffer(vb)
+
+		return gob.NewDecoder(rdr).Decode(&v)
+	})
+	if err != nil {
+		slog.WarnContext(ctx, "failed load session", slog.Any("error", err))
+	}
+	return v
+}
+
+func (s *Store) Save(ctx context.Context, sessionID string, value session.Value) error {
+	return s.db.Update(func(tx *bbolt.Tx) error {
+		bucket, err := tx.CreateBucketIfNotExists(s.bucketName)
+		if err != nil {
+			return err
+		}
+		wrt := bytes.NewBuffer([]byte{})
+		if err := gob.NewEncoder(wrt).Encode(value); err != nil {
+			return err
+		}
+
+		return bucket.Put([]byte(sessionID), wrt.Bytes())
+	})
+}

session/bbolt/go.mod

@@ -0,0 +1,7 @@
+module gitrepo.ru/neonxp/middleware/session/bbolt
+
+go 1.22.5
+
+require go.etcd.io/bbolt v1.3.10
+
+require golang.org/x/sys v0.4.0 // indirect

session/bbolt/go.sum

@@ -0,0 +1,4 @@
+go.etcd.io/bbolt v1.3.10 h1:+BqfJTcCzTItrop8mq/lbzL8wSGtj94UO/3U31shqG0=
+go.etcd.io/bbolt v1.3.10/go.mod h1:bK3UQLPJZly7IlNmV7uVHJDxfe5aK9Ll93e/74Y9oEQ=
+golang.org/x/sys v0.4.0 h1:Zr2JFtRQNX3BCZ8YtxRE9hNJYC8J6I1MVbMg6owUp18=
+golang.org/x/sys v0.4.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

session/memstore.go

@@ -0,0 +1,25 @@
+package session
+
+import (
+	"context"
+	"sync"
+)
+
+type MemoryStore struct {
+	store sync.Map
+}
+
+func (s *MemoryStore) Load(ctx context.Context, sessionID string) Value {
+	val, ok := s.store.Load(sessionID)
+	if ok {
+		return val.(Value)
+	}
+
+	return Value{}
+}
+
+func (s *MemoryStore) Save(ctx context.Context, sessionID string, value Value) error {
+	s.store.Store(sessionID, value)
+
+	return nil
+}

session/store.go

@@ -0,0 +1,17 @@
+package session
+
+import (
+	"context"
+	"errors"
+)
+
+var (
+	ErrSessionNotFound = errors.New("session not found")
+)
+
+type Store interface {
+	Load(ctx context.Context, sessionID string) Value
+	Save(ctx context.Context, sessionID string, value Value) error
+}
+
+type Value map[string]any