Invalid request validation

I'm getting the following error for request validation:

error while validating request: request should have required property '.headers'

The stack I am using is:

express 4.17.1
express-openapi-validate 0.5.1
OpenAPI spec 3.0.1
NodeJS 15.12.0
ES6 implementation

Doing some research I narrowed it down to the following code part of the validate function:

const reqToValidate = {
        ...req,
        cookies: req.cookies
          ? { ...req.cookies, ...req.signedCookies }
          : undefined,
      };

Which compiles to:

const reqToValidate = Object.assign({}, req, { cookies: req.cookies
                    ? Object.assign({}, req.cookies, req.signedCookies) : undefined });

The problem here is express uses accessors get/set for the headers, as a result the property headers is not present as part of reqToValidate.

As a quick fix the issue I implemented the following:

const validator = this.openApiValidator.validate(method, path);
return (req, res, next) => {
    const reqToValidate = Object.assign({}, req, {
        cookies: req.cookies
            ? Object.assign({}, req.cookies, req.signedCookies) : undefined
    });

    if (!reqToValidate.hasOwnProperty('headers')) {
        reqToValidate.headers = req.headers;
    }
    return validator(reqToValidate, res, next);
};

which works pretty well.

Thanks, ~Q

Hilzu / express-openapi-validate

Invalid request validation #70