|
| 1 | +package session |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "fmt" |
| 6 | + "net/http/cookiejar" |
| 7 | + "time" |
| 8 | + |
| 9 | + "github.com/leptonai/gpud/pkg/log" |
| 10 | + pkgmetadata "github.com/leptonai/gpud/pkg/metadata" |
| 11 | +) |
| 12 | + |
| 13 | +// processUpdateToken updates the session token in the database with the new token from the control plane. |
| 14 | +// It validates the new token before updating, and immediately reconnects the session with the new token. |
| 15 | +func (s *Session) processUpdateToken(payload Request, response *Response) { |
| 16 | + if payload.Token == "" { |
| 17 | + response.Error = "token cannot be empty" |
| 18 | + log.Logger.Errorw("updateToken request with empty token") |
| 19 | + return |
| 20 | + } |
| 21 | + |
| 22 | + // if in-memory cached token equal update token, just return is ok |
| 23 | + cacheToken := s.getToken() |
| 24 | + if cacheToken == payload.Token { |
| 25 | + log.Logger.Info("cached token already matches the requested token") |
| 26 | + return |
| 27 | + } |
| 28 | + |
| 29 | + if s.dbRW == nil { |
| 30 | + response.Error = "database connection not available" |
| 31 | + log.Logger.Errorw("updateToken failed: database connection is nil") |
| 32 | + return |
| 33 | + } |
| 34 | + |
| 35 | + // Validate the new token before updating |
| 36 | + log.Logger.Infow("validating new token with control plane") |
| 37 | + ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second) |
| 38 | + defer cancel() |
| 39 | + |
| 40 | + if err := s.validateTokenWithHealthCheck(ctx, payload.Token); err != nil { |
| 41 | + response.Error = fmt.Sprintf("token validation failed: %v", err) |
| 42 | + log.Logger.Errorw("new token validation failed", "error", err) |
| 43 | + return |
| 44 | + } |
| 45 | + log.Logger.Infow("new token validated successfully") |
| 46 | + |
| 47 | + // Save the new token to database |
| 48 | + if err := pkgmetadata.SetMetadata(ctx, s.dbRW, pkgmetadata.MetadataKeyToken, payload.Token); err != nil { |
| 49 | + response.Error = err.Error() |
| 50 | + log.Logger.Errorw("failed to update token in database", "error", err) |
| 51 | + return |
| 52 | + } |
| 53 | + |
| 54 | + // Update in-memory token |
| 55 | + s.setToken(payload.Token) |
| 56 | + |
| 57 | + log.Logger.Infow("token updated successfully in database and memory") |
| 58 | + |
| 59 | + // Immediately close the current session to force reconnection with the new token |
| 60 | + log.Logger.Infow("closing current session to immediately reconnect with new token") |
| 61 | + go func() { |
| 62 | + // Give some time for the response to be sent back to control plane |
| 63 | + time.Sleep(2 * time.Second) |
| 64 | + s.closer.Close() |
| 65 | + }() |
| 66 | +} |
| 67 | + |
| 68 | +// validateTokenWithHealthCheck validates the new token using the checkServerHealth mechanism |
| 69 | +func (s *Session) validateTokenWithHealthCheck(ctx context.Context, newToken string) error { |
| 70 | + // Create a new cookie jar for validation |
| 71 | + jar, err := cookiejar.New(nil) |
| 72 | + if err != nil { |
| 73 | + return fmt.Errorf("failed to create cookie jar: %w", err) |
| 74 | + } |
| 75 | + |
| 76 | + // Use the existing checkServerHealth function to validate the token |
| 77 | + // Pass newToken directly to avoid modifying the session's current token |
| 78 | + if err := s.checkServerHealthFunc(ctx, jar, newToken); err != nil { |
| 79 | + return fmt.Errorf("health check with new token failed: %w", err) |
| 80 | + } |
| 81 | + |
| 82 | + return nil |
| 83 | +} |
| 84 | + |
| 85 | +// processGetToken retrieves the current token value from the database. |
| 86 | +func (s *Session) processGetToken(response *Response) { |
| 87 | + if s.dbRO == nil { |
| 88 | + response.Error = "database connection not available" |
| 89 | + log.Logger.Errorw("getToken failed: database connection is nil") |
| 90 | + return |
| 91 | + } |
| 92 | + |
| 93 | + // if session token cache is exist, just return it |
| 94 | + tokenCache := s.getToken() |
| 95 | + if tokenCache != "" { |
| 96 | + response.Token = tokenCache |
| 97 | + return |
| 98 | + } |
| 99 | + |
| 100 | + // else, get token from metadata |
| 101 | + ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) |
| 102 | + defer cancel() |
| 103 | + |
| 104 | + token, err := pkgmetadata.ReadToken(ctx, s.dbRO) |
| 105 | + if err != nil { |
| 106 | + response.Error = err.Error() |
| 107 | + log.Logger.Errorw("failed to read token from database", "error", err) |
| 108 | + return |
| 109 | + } |
| 110 | + s.setToken(token) |
| 111 | + response.Token = token |
| 112 | + log.Logger.Infow("token retrieved successfully from database") |
| 113 | +} |
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