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* In-Memory Session Storage Backend
*
* Default storage for development and single-instance deployments.
* Sessions are lost on server restart.
*/
import { OAuthSession, DeviceFlowState, AuthCodeFlowState, AuthorizationCode } from "../types";
import { SessionStorageBackend, SessionStorageStats } from "./types";
import { logger } from "../../logger";
export interface MemoryStorageOptions {
/** Suppress initialization logging (used when wrapped by FileStorage) */
silent?: boolean;
}
export class MemoryStorageBackend implements SessionStorageBackend {
readonly type = "memory" as const;
private sessions = new Map<string, OAuthSession>();
private deviceFlows = new Map<string, DeviceFlowState>();
private authCodeFlows = new Map<string, AuthCodeFlowState>();
private authCodes = new Map<string, AuthorizationCode>();
private tokenToSession = new Map<string, string>();
private refreshTokenToSession = new Map<string, string>();
private mcpSessionToOAuthSession = new Map<string, string>();
private cleanupIntervalId: ReturnType<typeof setInterval> | null = null;
private silent: boolean;
constructor(options?: MemoryStorageOptions) {
this.silent = options?.silent ?? false;
}
async initialize(): Promise<void> {
this.startCleanupInterval();
if (!this.silent) {
logger.info("Memory storage backend initialized");
}
}
// Session operations
async createSession(session: OAuthSession): Promise<void> {
this.sessions.set(session.id, session);
if (session.mcpAccessToken) {
this.tokenToSession.set(session.mcpAccessToken, session.id);
}
if (session.mcpRefreshToken) {
this.refreshTokenToSession.set(session.mcpRefreshToken, session.id);
}
logger.debug({ sessionId: session.id, userId: session.gitlabUserId }, "Session created");
}
async getSession(sessionId: string): Promise<OAuthSession | undefined> {
return this.sessions.get(sessionId);
}
async getSessionByToken(token: string): Promise<OAuthSession | undefined> {
const sessionId = this.tokenToSession.get(token);
return sessionId ? this.sessions.get(sessionId) : undefined;
}
async getSessionByRefreshToken(refreshToken: string): Promise<OAuthSession | undefined> {
const sessionId = this.refreshTokenToSession.get(refreshToken);
return sessionId ? this.sessions.get(sessionId) : undefined;
}
async updateSession(sessionId: string, updates: Partial<OAuthSession>): Promise<boolean> {
const session = this.sessions.get(sessionId);
if (!session) {
logger.warn({ sessionId }, "Attempted to update non-existent session");
return false;
}
// Update token indexes if tokens changed
if (updates.mcpAccessToken && updates.mcpAccessToken !== session.mcpAccessToken) {
this.tokenToSession.delete(session.mcpAccessToken);
this.tokenToSession.set(updates.mcpAccessToken, sessionId);
}
if (updates.mcpRefreshToken && updates.mcpRefreshToken !== session.mcpRefreshToken) {
this.refreshTokenToSession.delete(session.mcpRefreshToken);
this.refreshTokenToSession.set(updates.mcpRefreshToken, sessionId);
}
Object.assign(session, updates, { updatedAt: Date.now() });
logger.debug({ sessionId }, "Session updated");
return true;
}
async deleteSession(sessionId: string): Promise<boolean> {
const session = this.sessions.get(sessionId);
if (!session) return false;
if (session.mcpAccessToken) {
this.tokenToSession.delete(session.mcpAccessToken);
}
if (session.mcpRefreshToken) {
this.refreshTokenToSession.delete(session.mcpRefreshToken);
}
this.sessions.delete(sessionId);
logger.debug({ sessionId }, "Session deleted");
return true;
}
async getAllSessions(): Promise<OAuthSession[]> {
return Array.from(this.sessions.values());
}
// Device flow operations
async storeDeviceFlow(state: string, flow: DeviceFlowState): Promise<void> {
this.deviceFlows.set(state, flow);
logger.debug({ state, userCode: flow.userCode }, "Device flow stored");
}
async getDeviceFlow(state: string): Promise<DeviceFlowState | undefined> {
return this.deviceFlows.get(state);
}
async getDeviceFlowByDeviceCode(deviceCode: string): Promise<DeviceFlowState | undefined> {
for (const flow of this.deviceFlows.values()) {
if (flow.deviceCode === deviceCode) return flow;
}
return undefined;
}
async deleteDeviceFlow(state: string): Promise<boolean> {
const deleted = this.deviceFlows.delete(state);
if (deleted) logger.debug({ state }, "Device flow deleted");
return deleted;
}
// Auth code flow operations
async storeAuthCodeFlow(internalState: string, flow: AuthCodeFlowState): Promise<void> {
this.authCodeFlows.set(internalState, flow);
logger.debug({ internalState: internalState.substring(0, 8) + "..." }, "Auth code flow stored");
}
async getAuthCodeFlow(internalState: string): Promise<AuthCodeFlowState | undefined> {
return this.authCodeFlows.get(internalState);
}
async deleteAuthCodeFlow(internalState: string): Promise<boolean> {
const deleted = this.authCodeFlows.delete(internalState);
if (deleted) {
logger.debug(
{ internalState: internalState.substring(0, 8) + "..." },
"Auth code flow deleted"
);
}
return deleted;
}
// Authorization code operations
async storeAuthCode(code: AuthorizationCode): Promise<void> {
this.authCodes.set(code.code, code);
logger.debug({ code: code.code.substring(0, 8) + "..." }, "Auth code stored");
}
async getAuthCode(code: string): Promise<AuthorizationCode | undefined> {
return this.authCodes.get(code);
}
async deleteAuthCode(code: string): Promise<boolean> {
const deleted = this.authCodes.delete(code);
if (deleted) logger.debug({ code: code.substring(0, 8) + "..." }, "Auth code deleted");
return deleted;
}
// MCP session mapping
async associateMcpSession(mcpSessionId: string, oauthSessionId: string): Promise<void> {
this.mcpSessionToOAuthSession.set(mcpSessionId, oauthSessionId);
logger.debug(
{ mcpSessionId, oauthSessionId: oauthSessionId.substring(0, 8) + "..." },
"MCP session associated with OAuth session"
);
}
async getSessionByMcpSessionId(mcpSessionId: string): Promise<OAuthSession | undefined> {
const oauthSessionId = this.mcpSessionToOAuthSession.get(mcpSessionId);
if (!oauthSessionId) return undefined;
return this.sessions.get(oauthSessionId);
}
async removeMcpSessionAssociation(mcpSessionId: string): Promise<boolean> {
const deleted = this.mcpSessionToOAuthSession.delete(mcpSessionId);
if (deleted) logger.debug({ mcpSessionId }, "MCP session association removed");
return deleted;
}
// Cleanup
async cleanup(): Promise<void> {
const now = Date.now();
let expiredSessions = 0;
let expiredDeviceFlows = 0;
let expiredAuthCodeFlows = 0;
let expiredAuthCodes = 0;
// Clean up expired sessions (7 days max age)
const maxAge = 7 * 24 * 60 * 60 * 1000;
for (const [id, session] of this.sessions) {
if (session.createdAt + maxAge < now) {
await this.deleteSession(id);
expiredSessions++;
}
}
// Clean up expired device flows
for (const [state, flow] of this.deviceFlows) {
if (flow.expiresAt < now) {
this.deviceFlows.delete(state);
expiredDeviceFlows++;
}
}
// Clean up expired auth code flows
for (const [state, flow] of this.authCodeFlows) {
if (flow.expiresAt < now) {
this.authCodeFlows.delete(state);
expiredAuthCodeFlows++;
}
}
// Clean up expired auth codes
for (const [code, auth] of this.authCodes) {
if (auth.expiresAt < now) {
this.authCodes.delete(code);
expiredAuthCodes++;
}
}
if (
expiredSessions > 0 ||
expiredDeviceFlows > 0 ||
expiredAuthCodeFlows > 0 ||
expiredAuthCodes > 0
) {
logger.debug(
{
expiredSessions,
expiredDeviceFlows,
expiredAuthCodeFlows,
expiredAuthCodes,
remainingSessions: this.sessions.size,
},
"Memory storage cleanup completed"
);
}
}
async close(): Promise<void> {
this.stopCleanupInterval();
if (!this.silent) {
logger.info("Memory storage backend closed");
}
}
async getStats(): Promise<SessionStorageStats> {
return {
sessions: this.sessions.size,
deviceFlows: this.deviceFlows.size,
authCodeFlows: this.authCodeFlows.size,
authCodes: this.authCodes.size,
mcpSessionMappings: this.mcpSessionToOAuthSession.size,
};
}
private startCleanupInterval(): void {
this.cleanupIntervalId = setInterval(
() => {
this.cleanup().catch(err => logger.error({ err }, "Cleanup error"));
},
5 * 60 * 1000
);
Eif (this.cleanupIntervalId.unref) {
this.cleanupIntervalId.unref();
}
}
private stopCleanupInterval(): void {
if (this.cleanupIntervalId) {
clearInterval(this.cleanupIntervalId);
this.cleanupIntervalId = null;
}
}
/** Export all data for file persistence */
exportData(): {
sessions: OAuthSession[];
deviceFlows: Array<{ state: string; flow: DeviceFlowState }>;
authCodeFlows: Array<{ internalState: string; flow: AuthCodeFlowState }>;
authCodes: AuthorizationCode[];
mcpSessionMappings: Array<{ mcpSessionId: string; oauthSessionId: string }>;
} {
return {
sessions: Array.from(this.sessions.values()),
deviceFlows: Array.from(this.deviceFlows.entries()).map(([state, flow]) => ({ state, flow })),
authCodeFlows: Array.from(this.authCodeFlows.entries()).map(([internalState, flow]) => ({
internalState,
flow,
})),
authCodes: Array.from(this.authCodes.values()),
mcpSessionMappings: Array.from(this.mcpSessionToOAuthSession.entries()).map(
([mcpSessionId, oauthSessionId]) => ({ mcpSessionId, oauthSessionId })
),
};
}
/** Import data from file persistence */
importData(data: {
sessions?: OAuthSession[];
deviceFlows?: Array<{ state: string; flow: DeviceFlowState }>;
authCodeFlows?: Array<{ internalState: string; flow: AuthCodeFlowState }>;
authCodes?: AuthorizationCode[];
mcpSessionMappings?: Array<{ mcpSessionId: string; oauthSessionId: string }>;
}): void {
// Clear existing data
this.sessions.clear();
this.deviceFlows.clear();
this.authCodeFlows.clear();
this.authCodes.clear();
this.tokenToSession.clear();
this.refreshTokenToSession.clear();
this.mcpSessionToOAuthSession.clear();
// Import sessions
if (data.sessions) {
for (const session of data.sessions) {
this.sessions.set(session.id, session);
Eif (session.mcpAccessToken) {
this.tokenToSession.set(session.mcpAccessToken, session.id);
}
Eif (session.mcpRefreshToken) {
this.refreshTokenToSession.set(session.mcpRefreshToken, session.id);
}
}
}
// Import device flows
if (data.deviceFlows) {
for (const { state, flow } of data.deviceFlows) {
this.deviceFlows.set(state, flow);
}
}
// Import auth code flows
if (data.authCodeFlows) {
for (const { internalState, flow } of data.authCodeFlows) {
this.authCodeFlows.set(internalState, flow);
}
}
// Import auth codes
if (data.authCodes) {
for (const code of data.authCodes) {
this.authCodes.set(code.code, code);
}
}
// Import MCP session mappings
if (data.mcpSessionMappings) {
for (const { mcpSessionId, oauthSessionId } of data.mcpSessionMappings) {
this.mcpSessionToOAuthSession.set(mcpSessionId, oauthSessionId);
}
}
logger.info(
{
sessions: this.sessions.size,
deviceFlows: this.deviceFlows.size,
authCodeFlows: this.authCodeFlows.size,
authCodes: this.authCodes.size,
},
"Data imported into memory storage"
);
}
}
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