/
session.go
133 lines (111 loc) · 2.82 KB
/
session.go
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package session
import (
"context"
"crypto/rand"
"crypto/sha256"
"database/sql"
"encoding/base32"
"fmt"
"time"
"github.com/gofiber/fiber/v2"
"github.com/merlinfuchs/embed-generator/embedg-server/db/postgres"
"github.com/rs/zerolog/log"
"github.com/spf13/viper"
)
type Session struct {
UserID string
GuildIDs []string
AccessToken string
CreatedAt time.Time
ExpiresAt time.Time
}
type SessionManager struct {
pg *postgres.PostgresStore
}
func New(pg *postgres.PostgresStore) *SessionManager {
return &SessionManager{
pg: pg,
}
}
func (s *SessionManager) GetSession(c *fiber.Ctx) (*Session, error) {
token := c.Cookies("session_token", c.Get("Authorization"))
if token == "" {
return nil, nil
}
tokenHash, err := hashSessionToken(token)
if err != nil {
return nil, err
}
model, err := s.pg.Q.GetSession(c.Context(), tokenHash)
if err != nil {
if err == sql.ErrNoRows {
return nil, nil
}
return nil, err
}
return &Session{
UserID: model.UserID,
GuildIDs: model.GuildIds,
AccessToken: model.AccessToken,
CreatedAt: model.CreatedAt,
ExpiresAt: model.ExpiresAt,
}, nil
}
func (s *SessionManager) CreateSession(ctx context.Context, userID string, guildIDs []string, accessToken string) (string, error) {
token := generateSessionToken()
tokenHash, err := hashSessionToken(token)
if err != nil {
return "", err
}
_, err = s.pg.Q.InsertSession(ctx, postgres.InsertSessionParams{
TokenHash: tokenHash,
UserID: userID,
GuildIds: guildIDs,
AccessToken: accessToken,
CreatedAt: time.Now().UTC(),
ExpiresAt: time.Now().UTC().Add(30 * 24 * time.Hour),
})
if err != nil {
return "", err
}
return token, nil
}
func (s *SessionManager) CreateSessionCookie(c *fiber.Ctx, token string) {
c.Cookie(&fiber.Cookie{
Name: "session_token",
Value: token,
HTTPOnly: true,
Secure: !viper.GetBool("api.insecure_cookies"),
SameSite: "strict",
Expires: time.Now().UTC().Add(30 * 24 * time.Hour),
})
}
func (s *SessionManager) DeleteSession(c *fiber.Ctx) error {
token := c.Cookies("session_token")
if token == "" {
return nil
}
c.ClearCookie("session_token")
tokenHash, err := hashSessionToken(token)
if err != nil {
return err
}
return s.pg.Q.DeleteSession(c.Context(), tokenHash)
}
func generateSessionToken() string {
b := make([]byte, 35)
if _, err := rand.Read(b); err != nil {
log.Fatal().Err(err).Msg("failed to generate random bytes for session token")
}
token := base32.HexEncoding.EncodeToString(b)
return token
}
func hashSessionToken(token string) (string, error) {
b, err := base32.HexEncoding.DecodeString(token)
if err != nil {
return "", fmt.Errorf("failed to decode token: %v", err)
}
tokenHashBytes := sha256.Sum256(b)
tokenHash := base32.HexEncoding.EncodeToString(tokenHashBytes[:])
return tokenHash, nil
}