video-ad-sdk/dist/adUnit/helpers/fetch/fetchHtml.js

VAST/VPAID SDK that allows video ads to be played on top of any player

class FetchError extends Error {
    constructor(message) {
        super(message);
        this.name = 'FetchError';
        Object.setPrototypeOf(this, FetchError.prototype);
    }
}
const isValidContentType = (contentType) => {
    const normalisedCT = contentType.toLowerCase();
    return ['text/plain', 'text/html'].some((allowedType) => normalisedCT.includes(allowedType));
};
const BAD_REQUEST = 400;
export const fetchHtml = async (endpoint) => {
    const response = await fetch(endpoint);
    const contentType = response.headers.get('Content-Type');
    if (response.status >= BAD_REQUEST) {
        const error = new FetchError(response.statusText);
        error.response = response;
        throw error;
    }
    if (!contentType || !isValidContentType(contentType)) {
        const error = new FetchError(`fetchHtml error, invalid Content-Type ${contentType}`);
        error.response = response;
        throw error;
    }
    return response.text();
};