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Add security headers to HTTP transport #39

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Add security headers to HTTP transport #39

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13 changes: 13 additions & 0 deletions package-lock.json
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21 changes: 21 additions & 0 deletions src/http-transport.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -130,6 +130,27 @@ export class HttpTransport {
// JSON body parser
this.app.use(express.json());

// Security Headers
this.app.use((req: Request, res: Response, next: NextFunction) => {
// HSTS: 1 year, include subdomains
if (this.config.host !== 'localhost' && this.config.host !== '127.0.0.1') {
res.setHeader('Strict-Transport-Security', 'max-age=31536000; includeSubDomains');
}

// Prevent MIME sniffing
res.setHeader('X-Content-Type-Options', 'nosniff');

// Prevent clickjacking
res.setHeader('X-Frame-Options', 'DENY');

// CSP: Restrict sources to self
// Note: We use a minimal policy suitable for an API server.
// default-src 'self' prevents loading resources from external domains.
res.setHeader('Content-Security-Policy', "default-src 'self'; frame-ancestors 'none'; object-src 'none'; base-uri 'none';");

next();
});

// Metrics: Track request start time
this.app.use((req: Request, res: Response, next: NextFunction) => {
(req as any).startTime = Date.now();
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