All files / src/Infrastructure/Http/Utils Headers.ts

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import { Request } from 'express';
 
/**
 * Extracts a header value from the request
 * @param req The Express request object
 * @param headerName The name of the header to extract
 * @returns The header value or undefined if not present
 */
export const extractHeader = (req: Request, headerName: string): string | undefined => {
    if (!req.headers[headerName]) {
        return undefined;
    }
 
    if (Array.isArray(req.headers[headerName])) {
        return req.headers[headerName][0];
    }
 
    return req.headers[headerName];
};