mirror of https://github.com/usememos/memos.git
613 lines
22 KiB
Go
613 lines
22 KiB
Go
package v1
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import (
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"context"
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"fmt"
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"log/slog"
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"regexp"
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"strings"
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"time"
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"github.com/pkg/errors"
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"golang.org/x/crypto/bcrypt"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/metadata"
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"google.golang.org/grpc/status"
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"google.golang.org/protobuf/types/known/emptypb"
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"google.golang.org/protobuf/types/known/timestamppb"
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"github.com/usememos/memos/internal/util"
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"github.com/usememos/memos/plugin/idp"
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"github.com/usememos/memos/plugin/idp/oauth2"
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v1pb "github.com/usememos/memos/proto/gen/api/v1"
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storepb "github.com/usememos/memos/proto/gen/store"
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"github.com/usememos/memos/server/auth"
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"github.com/usememos/memos/store"
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)
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const (
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unmatchedUsernameAndPasswordError = "unmatched username and password"
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)
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// GetCurrentUser returns the authenticated user's information.
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// Validates the access token and returns user details.
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//
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// Authentication: Required (access token).
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// Returns: User information.
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func (s *APIV1Service) GetCurrentUser(ctx context.Context, _ *v1pb.GetCurrentUserRequest) (*v1pb.GetCurrentUserResponse, error) {
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user, err := s.fetchCurrentUser(ctx)
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if err != nil {
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return nil, status.Errorf(codes.Unauthenticated, "failed to get current user: %v", err)
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}
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if user == nil {
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// Clear auth cookies
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if err := s.clearAuthCookies(ctx); err != nil {
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return nil, status.Errorf(codes.Internal, "failed to clear auth cookies: %v", err)
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}
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return nil, status.Errorf(codes.Unauthenticated, "user not found")
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}
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return &v1pb.GetCurrentUserResponse{
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User: convertUserFromStore(user),
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}, nil
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}
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// SignIn authenticates a user with credentials and returns tokens.
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// On success, returns an access token and sets a refresh token cookie.
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//
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// Supports two authentication methods:
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// 1. Password-based authentication (username + password).
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// 2. SSO authentication (OAuth2 authorization code).
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//
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// Authentication: Not required (public endpoint).
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// Returns: User info, access token, and token expiry.
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func (s *APIV1Service) SignIn(ctx context.Context, request *v1pb.SignInRequest) (*v1pb.SignInResponse, error) {
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var existingUser *store.User
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// Authentication Method 1: Password-based authentication
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if passwordCredentials := request.GetPasswordCredentials(); passwordCredentials != nil {
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user, err := s.Store.GetUser(ctx, &store.FindUser{
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Username: &passwordCredentials.Username,
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})
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if err != nil {
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return nil, status.Errorf(codes.Internal, "failed to get user, error: %v", err)
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}
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if user == nil {
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return nil, status.Errorf(codes.InvalidArgument, unmatchedUsernameAndPasswordError)
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}
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// Compare the stored hashed password, with the hashed version of the password that was received.
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if err := bcrypt.CompareHashAndPassword([]byte(user.PasswordHash), []byte(passwordCredentials.Password)); err != nil {
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return nil, status.Errorf(codes.InvalidArgument, unmatchedUsernameAndPasswordError)
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}
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instanceGeneralSetting, err := s.Store.GetInstanceGeneralSetting(ctx)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "failed to get instance general setting, error: %v", err)
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}
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// Check if the password auth in is allowed.
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if instanceGeneralSetting.DisallowPasswordAuth && user.Role == store.RoleUser {
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return nil, status.Errorf(codes.PermissionDenied, "password signin is not allowed")
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}
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existingUser = user
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} else if ssoCredentials := request.GetSsoCredentials(); ssoCredentials != nil {
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// Authentication Method 2: SSO (OAuth2) authentication
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identityProvider, err := s.Store.GetIdentityProvider(ctx, &store.FindIdentityProvider{
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ID: &ssoCredentials.IdpId,
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})
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if err != nil {
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return nil, status.Errorf(codes.Internal, "failed to get identity provider, error: %v", err)
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}
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if identityProvider == nil {
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return nil, status.Errorf(codes.InvalidArgument, "identity provider not found")
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}
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var userInfo *idp.IdentityProviderUserInfo
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if identityProvider.Type == storepb.IdentityProvider_OAUTH2 {
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oauth2IdentityProvider, err := oauth2.NewIdentityProvider(identityProvider.Config.GetOauth2Config())
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if err != nil {
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return nil, status.Errorf(codes.Internal, "failed to create oauth2 identity provider, error: %v", err)
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}
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// Pass code_verifier for PKCE support (empty string if not provided for backward compatibility)
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token, err := oauth2IdentityProvider.ExchangeToken(ctx, ssoCredentials.RedirectUri, ssoCredentials.Code, ssoCredentials.CodeVerifier)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "failed to exchange token, error: %v", err)
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}
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userInfo, err = oauth2IdentityProvider.UserInfo(token)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "failed to get user info, error: %v", err)
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}
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}
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identifierFilter := identityProvider.IdentifierFilter
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if identifierFilter != "" {
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identifierFilterRegex, err := regexp.Compile(identifierFilter)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "failed to compile identifier filter regex, error: %v", err)
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}
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if !identifierFilterRegex.MatchString(userInfo.Identifier) {
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return nil, status.Errorf(codes.PermissionDenied, "identifier %s is not allowed", userInfo.Identifier)
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}
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}
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user, err := s.Store.GetUser(ctx, &store.FindUser{
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Username: &userInfo.Identifier,
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})
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if err != nil {
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return nil, status.Errorf(codes.Internal, "failed to get user, error: %v", err)
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}
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if user == nil {
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// Check if the user is allowed to sign up.
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instanceGeneralSetting, err := s.Store.GetInstanceGeneralSetting(ctx)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "failed to get instance general setting, error: %v", err)
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}
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if instanceGeneralSetting.DisallowUserRegistration {
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return nil, status.Errorf(codes.PermissionDenied, "user registration is not allowed")
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}
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// Create a new user with the user info from the identity provider.
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userCreate := &store.User{
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Username: userInfo.Identifier,
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// The new signup user should be normal user by default.
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Role: store.RoleUser,
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Nickname: userInfo.DisplayName,
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Email: userInfo.Email,
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AvatarURL: userInfo.AvatarURL,
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}
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password, err := util.RandomString(20)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "failed to generate random password, error: %v", err)
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}
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passwordHash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "failed to generate password hash, error: %v", err)
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}
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userCreate.PasswordHash = string(passwordHash)
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user, err = s.Store.CreateUser(ctx, userCreate)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "failed to create user, error: %v", err)
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}
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}
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existingUser = user
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}
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if existingUser == nil {
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return nil, status.Errorf(codes.InvalidArgument, "invalid credentials")
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}
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if existingUser.RowStatus == store.Archived {
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return nil, status.Errorf(codes.PermissionDenied, "user has been archived with username %s", existingUser.Username)
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}
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accessToken, accessExpiresAt, err := s.doSignIn(ctx, existingUser)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "failed to sign in: %v", err)
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}
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return &v1pb.SignInResponse{
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User: convertUserFromStore(existingUser),
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AccessToken: accessToken,
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AccessTokenExpiresAt: timestamppb.New(accessExpiresAt),
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}, nil
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}
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// doSignIn performs the actual sign-in operation by creating a session and setting the cookie.
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//
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// This function:
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// 1. Generates refresh token and access token.
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// 2. Stores refresh token metadata in user_setting.
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// 3. Sets refresh token as HttpOnly cookie.
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// 4. Returns access token and its expiry time.
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func (s *APIV1Service) doSignIn(ctx context.Context, user *store.User) (string, time.Time, error) {
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// Generate refresh token
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tokenID := util.GenUUID()
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refreshToken, refreshExpiresAt, err := auth.GenerateRefreshToken(user.ID, tokenID, []byte(s.Secret))
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if err != nil {
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return "", time.Time{}, status.Errorf(codes.Internal, "failed to generate refresh token: %v", err)
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}
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// Store refresh token metadata
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clientInfo := s.extractClientInfo(ctx)
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refreshTokenRecord := &storepb.RefreshTokensUserSetting_RefreshToken{
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TokenId: tokenID,
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ExpiresAt: timestamppb.New(refreshExpiresAt),
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CreatedAt: timestamppb.Now(),
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ClientInfo: clientInfo,
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}
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if err := s.Store.AddUserRefreshToken(ctx, user.ID, refreshTokenRecord); err != nil {
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slog.Error("failed to store refresh token", "error", err)
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}
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// Set refresh token cookie
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refreshCookie := s.buildRefreshTokenCookie(ctx, refreshToken, refreshExpiresAt)
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if err := SetResponseHeader(ctx, "Set-Cookie", refreshCookie); err != nil {
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return "", time.Time{}, status.Errorf(codes.Internal, "failed to set refresh token cookie: %v", err)
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}
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// Generate access token
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accessToken, accessExpiresAt, err := auth.GenerateAccessTokenV2(
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user.ID,
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user.Username,
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string(user.Role),
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string(user.RowStatus),
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[]byte(s.Secret),
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)
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if err != nil {
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return "", time.Time{}, status.Errorf(codes.Internal, "failed to generate access token: %v", err)
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}
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return accessToken, accessExpiresAt, nil
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}
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// SignOut terminates the user's authentication.
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// Revokes the refresh token and clears the authentication cookie.
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//
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// Authentication: Required (access token).
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// Returns: Empty response on success.
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func (s *APIV1Service) SignOut(ctx context.Context, _ *v1pb.SignOutRequest) (*emptypb.Empty, error) {
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// Get user from access token claims
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claims := auth.GetUserClaims(ctx)
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if claims != nil {
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// Revoke refresh token if we can identify it
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refreshToken := ""
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if md, ok := metadata.FromIncomingContext(ctx); ok {
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if cookies := md.Get("cookie"); len(cookies) > 0 {
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refreshToken = auth.ExtractRefreshTokenFromCookie(cookies[0])
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}
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}
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if refreshToken != "" {
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refreshClaims, err := auth.ParseRefreshToken(refreshToken, []byte(s.Secret))
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if err == nil {
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// Remove refresh token from user_setting by token_id
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_ = s.Store.RemoveUserRefreshToken(ctx, claims.UserID, refreshClaims.TokenID)
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}
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}
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}
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// Clear refresh token cookie
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if err := s.clearAuthCookies(ctx); err != nil {
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return nil, status.Errorf(codes.Internal, "failed to clear auth cookies, error: %v", err)
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}
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return &emptypb.Empty{}, nil
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}
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// RefreshToken exchanges a valid refresh token for a new access token.
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//
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// This endpoint implements refresh token rotation with sliding window sessions:
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// 1. Extracts the refresh token from the HttpOnly cookie (memos_refresh)
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// 2. Validates the refresh token against the database (checking expiry and revocation)
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// 3. Rotates the refresh token: generates a new one with fresh 30-day expiry
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// 4. Generates a new short-lived access token (15 minutes)
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// 5. Sets the new refresh token as HttpOnly cookie
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// 6. Returns the new access token and its expiry time
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//
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// Token rotation provides:
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// - Sliding window sessions: active users stay logged in indefinitely
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// - Better security: stolen refresh tokens become invalid after legitimate refresh
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//
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// Authentication: Requires valid refresh token in cookie (public endpoint)
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// Returns: New access token and expiry timestamp.
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func (s *APIV1Service) RefreshToken(ctx context.Context, _ *v1pb.RefreshTokenRequest) (*v1pb.RefreshTokenResponse, error) {
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// Extract refresh token from cookie
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refreshToken := ""
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if md, ok := metadata.FromIncomingContext(ctx); ok {
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if cookies := md.Get("cookie"); len(cookies) > 0 {
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refreshToken = auth.ExtractRefreshTokenFromCookie(cookies[0])
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}
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}
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if refreshToken == "" {
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return nil, status.Errorf(codes.Unauthenticated, "refresh token not found")
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}
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// Validate refresh token and get old token ID for rotation
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authenticator := auth.NewAuthenticator(s.Store, s.Secret)
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user, oldTokenID, err := authenticator.AuthenticateByRefreshToken(ctx, refreshToken)
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if err != nil {
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return nil, status.Errorf(codes.Unauthenticated, "invalid refresh token: %v", err)
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}
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// --- Refresh Token Rotation ---
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// Generate new refresh token with fresh 30-day expiry (sliding window)
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newTokenID := util.GenUUID()
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newRefreshToken, newRefreshExpiresAt, err := auth.GenerateRefreshToken(user.ID, newTokenID, []byte(s.Secret))
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if err != nil {
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return nil, status.Errorf(codes.Internal, "failed to generate refresh token: %v", err)
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}
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// Store new refresh token (add before remove to handle race conditions)
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clientInfo := s.extractClientInfo(ctx)
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newRefreshTokenRecord := &storepb.RefreshTokensUserSetting_RefreshToken{
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TokenId: newTokenID,
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ExpiresAt: timestamppb.New(newRefreshExpiresAt),
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CreatedAt: timestamppb.Now(),
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ClientInfo: clientInfo,
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}
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if err := s.Store.AddUserRefreshToken(ctx, user.ID, newRefreshTokenRecord); err != nil {
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return nil, status.Errorf(codes.Internal, "failed to store refresh token: %v", err)
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}
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// Remove old refresh token
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if err := s.Store.RemoveUserRefreshToken(ctx, user.ID, oldTokenID); err != nil {
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// Log but don't fail - old token will expire naturally
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slog.Warn("failed to remove old refresh token", "error", err, "userID", user.ID, "tokenID", oldTokenID)
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}
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// Set new refresh token cookie
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newRefreshCookie := s.buildRefreshTokenCookie(ctx, newRefreshToken, newRefreshExpiresAt)
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if err := SetResponseHeader(ctx, "Set-Cookie", newRefreshCookie); err != nil {
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return nil, status.Errorf(codes.Internal, "failed to set refresh token cookie: %v", err)
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}
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// --- End Rotation ---
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// Generate new access token
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accessToken, expiresAt, err := auth.GenerateAccessTokenV2(
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user.ID,
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user.Username,
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string(user.Role),
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string(user.RowStatus),
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[]byte(s.Secret),
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)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "failed to generate access token: %v", err)
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}
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return &v1pb.RefreshTokenResponse{
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AccessToken: accessToken,
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ExpiresAt: timestamppb.New(expiresAt),
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}, nil
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}
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func (s *APIV1Service) clearAuthCookies(ctx context.Context) error {
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// Clear refresh token cookie
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refreshCookie := s.buildRefreshTokenCookie(ctx, "", time.Time{})
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if err := SetResponseHeader(ctx, "Set-Cookie", refreshCookie); err != nil {
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return errors.Wrap(err, "failed to set refresh cookie")
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}
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return nil
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}
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func (*APIV1Service) buildRefreshTokenCookie(ctx context.Context, refreshToken string, expireTime time.Time) string {
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attrs := []string{
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fmt.Sprintf("%s=%s", auth.RefreshTokenCookieName, refreshToken),
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"Path=/",
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"HttpOnly",
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}
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if expireTime.IsZero() {
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attrs = append(attrs, "Expires=Thu, 01 Jan 1970 00:00:00 GMT")
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} else {
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// RFC 6265 requires cookie expiration dates to use GMT timezone
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// Convert to UTC and format with explicit "GMT" to ensure browser compatibility
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attrs = append(attrs, "Expires="+expireTime.UTC().Format("Mon, 02 Jan 2006 15:04:05 GMT"))
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}
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// Try to determine if the request is HTTPS by checking the origin header
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// Default to non-HTTPS (Lax SameSite) if metadata is not available
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isHTTPS := false
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if md, ok := metadata.FromIncomingContext(ctx); ok {
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for _, v := range md.Get("origin") {
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if strings.HasPrefix(v, "https://") {
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isHTTPS = true
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break
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}
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}
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}
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if isHTTPS {
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attrs = append(attrs, "SameSite=Lax", "Secure")
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} else {
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attrs = append(attrs, "SameSite=Lax")
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}
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return strings.Join(attrs, "; ")
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}
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func (s *APIV1Service) fetchCurrentUser(ctx context.Context) (*store.User, error) {
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userID := auth.GetUserID(ctx)
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if userID == 0 {
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return nil, nil
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}
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user, err := s.Store.GetUser(ctx, &store.FindUser{
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ID: &userID,
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})
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if err != nil {
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return nil, err
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}
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if user == nil {
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return nil, errors.Errorf("user %d not found", userID)
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}
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return user, nil
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}
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// extractClientInfo extracts comprehensive client information from the request context.
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//
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// This function parses metadata from the gRPC context to extract:
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// - User Agent: Raw user agent string for detailed parsing
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// - IP Address: Client IP from X-Forwarded-For or X-Real-IP headers
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// - Device Type: "mobile", "tablet", or "desktop" (parsed from user agent)
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// - Operating System: OS name and version (e.g., "iOS 17.1", "Windows 10/11")
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// - Browser: Browser name and version (e.g., "Chrome 120.0.0.0")
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//
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// This information enables users to:
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// - See all active sessions with device details
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// - Identify suspicious login attempts
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// - Revoke specific sessions from unknown devices.
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func (s *APIV1Service) extractClientInfo(ctx context.Context) *storepb.RefreshTokensUserSetting_ClientInfo {
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clientInfo := &storepb.RefreshTokensUserSetting_ClientInfo{}
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// Extract user agent from metadata if available
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if md, ok := metadata.FromIncomingContext(ctx); ok {
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if userAgents := md.Get("user-agent"); len(userAgents) > 0 {
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userAgent := userAgents[0]
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clientInfo.UserAgent = userAgent
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// Parse user agent to extract device type, OS, browser info
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s.parseUserAgent(userAgent, clientInfo)
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}
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if forwardedFor := md.Get("x-forwarded-for"); len(forwardedFor) > 0 {
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ipAddress := strings.Split(forwardedFor[0], ",")[0] // Get the first IP in case of multiple
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ipAddress = strings.TrimSpace(ipAddress)
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clientInfo.IpAddress = ipAddress
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} else if realIP := md.Get("x-real-ip"); len(realIP) > 0 {
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clientInfo.IpAddress = realIP[0]
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}
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}
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return clientInfo
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}
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// parseUserAgent extracts device type, OS, and browser information from user agent string.
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//
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// Detection logic:
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// - Device Type: Checks for keywords like "mobile", "tablet", "ipad"
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// - OS: Pattern matches for iOS, Android, Windows, macOS, Linux, Chrome OS
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// - Browser: Identifies Edge, Chrome, Firefox, Safari, Opera
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//
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// Note: This is a simplified parser. For production use with high accuracy requirements,
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// consider using a dedicated user agent parsing library.
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func (*APIV1Service) parseUserAgent(userAgent string, clientInfo *storepb.RefreshTokensUserSetting_ClientInfo) {
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if userAgent == "" {
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return
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}
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userAgent = strings.ToLower(userAgent)
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// Detect device type
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if strings.Contains(userAgent, "ipad") || strings.Contains(userAgent, "tablet") {
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clientInfo.DeviceType = "tablet"
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} else if strings.Contains(userAgent, "mobile") || strings.Contains(userAgent, "android") ||
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strings.Contains(userAgent, "iphone") || strings.Contains(userAgent, "ipod") ||
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strings.Contains(userAgent, "windows phone") || strings.Contains(userAgent, "blackberry") {
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clientInfo.DeviceType = "mobile"
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} else {
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clientInfo.DeviceType = "desktop"
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}
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// Detect operating system
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if strings.Contains(userAgent, "iphone os") || strings.Contains(userAgent, "cpu os") {
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// Extract iOS version
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if idx := strings.Index(userAgent, "cpu os "); idx != -1 {
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versionStart := idx + 7
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versionEnd := strings.Index(userAgent[versionStart:], " ")
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if versionEnd != -1 {
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version := strings.ReplaceAll(userAgent[versionStart:versionStart+versionEnd], "_", ".")
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clientInfo.Os = "iOS " + version
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} else {
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clientInfo.Os = "iOS"
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}
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} else if idx := strings.Index(userAgent, "iphone os "); idx != -1 {
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versionStart := idx + 10
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versionEnd := strings.Index(userAgent[versionStart:], " ")
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if versionEnd != -1 {
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version := strings.ReplaceAll(userAgent[versionStart:versionStart+versionEnd], "_", ".")
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clientInfo.Os = "iOS " + version
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} else {
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clientInfo.Os = "iOS"
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}
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} else {
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clientInfo.Os = "iOS"
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}
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} else if strings.Contains(userAgent, "android") {
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// Extract Android version
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if idx := strings.Index(userAgent, "android "); idx != -1 {
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versionStart := idx + 8
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versionEnd := strings.Index(userAgent[versionStart:], ";")
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if versionEnd == -1 {
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versionEnd = strings.Index(userAgent[versionStart:], ")")
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}
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if versionEnd != -1 {
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version := userAgent[versionStart : versionStart+versionEnd]
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clientInfo.Os = "Android " + version
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} else {
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clientInfo.Os = "Android"
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}
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} else {
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clientInfo.Os = "Android"
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}
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} else if strings.Contains(userAgent, "windows nt 10.0") {
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clientInfo.Os = "Windows 10/11"
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} else if strings.Contains(userAgent, "windows nt 6.3") {
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clientInfo.Os = "Windows 8.1"
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} else if strings.Contains(userAgent, "windows nt 6.1") {
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clientInfo.Os = "Windows 7"
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} else if strings.Contains(userAgent, "windows") {
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clientInfo.Os = "Windows"
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} else if strings.Contains(userAgent, "mac os x") {
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// Extract macOS version
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if idx := strings.Index(userAgent, "mac os x "); idx != -1 {
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versionStart := idx + 9
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versionEnd := strings.Index(userAgent[versionStart:], ";")
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if versionEnd == -1 {
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versionEnd = strings.Index(userAgent[versionStart:], ")")
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}
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if versionEnd != -1 {
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version := strings.ReplaceAll(userAgent[versionStart:versionStart+versionEnd], "_", ".")
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clientInfo.Os = "macOS " + version
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} else {
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clientInfo.Os = "macOS"
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}
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} else {
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clientInfo.Os = "macOS"
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}
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} else if strings.Contains(userAgent, "linux") {
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clientInfo.Os = "Linux"
|
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} else if strings.Contains(userAgent, "cros") {
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clientInfo.Os = "Chrome OS"
|
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}
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|
|
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// Detect browser
|
|
if strings.Contains(userAgent, "edg/") {
|
|
// Extract Edge version
|
|
if idx := strings.Index(userAgent, "edg/"); idx != -1 {
|
|
versionStart := idx + 4
|
|
versionEnd := strings.Index(userAgent[versionStart:], " ")
|
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if versionEnd == -1 {
|
|
versionEnd = len(userAgent) - versionStart
|
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}
|
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version := userAgent[versionStart : versionStart+versionEnd]
|
|
clientInfo.Browser = "Edge " + version
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} else {
|
|
clientInfo.Browser = "Edge"
|
|
}
|
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} else if strings.Contains(userAgent, "chrome/") && !strings.Contains(userAgent, "edg") {
|
|
// Extract Chrome version
|
|
if idx := strings.Index(userAgent, "chrome/"); idx != -1 {
|
|
versionStart := idx + 7
|
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versionEnd := strings.Index(userAgent[versionStart:], " ")
|
|
if versionEnd == -1 {
|
|
versionEnd = len(userAgent) - versionStart
|
|
}
|
|
version := userAgent[versionStart : versionStart+versionEnd]
|
|
clientInfo.Browser = "Chrome " + version
|
|
} else {
|
|
clientInfo.Browser = "Chrome"
|
|
}
|
|
} else if strings.Contains(userAgent, "firefox/") {
|
|
// Extract Firefox version
|
|
if idx := strings.Index(userAgent, "firefox/"); idx != -1 {
|
|
versionStart := idx + 8
|
|
versionEnd := strings.Index(userAgent[versionStart:], " ")
|
|
if versionEnd == -1 {
|
|
versionEnd = len(userAgent) - versionStart
|
|
}
|
|
version := userAgent[versionStart : versionStart+versionEnd]
|
|
clientInfo.Browser = "Firefox " + version
|
|
} else {
|
|
clientInfo.Browser = "Firefox"
|
|
}
|
|
} else if strings.Contains(userAgent, "safari/") && !strings.Contains(userAgent, "chrome") && !strings.Contains(userAgent, "edg") {
|
|
// Extract Safari version
|
|
if idx := strings.Index(userAgent, "version/"); idx != -1 {
|
|
versionStart := idx + 8
|
|
versionEnd := strings.Index(userAgent[versionStart:], " ")
|
|
if versionEnd == -1 {
|
|
versionEnd = len(userAgent) - versionStart
|
|
}
|
|
version := userAgent[versionStart : versionStart+versionEnd]
|
|
clientInfo.Browser = "Safari " + version
|
|
} else {
|
|
clientInfo.Browser = "Safari"
|
|
}
|
|
} else if strings.Contains(userAgent, "opera/") || strings.Contains(userAgent, "opr/") {
|
|
clientInfo.Browser = "Opera"
|
|
}
|
|
}
|