@pent4gon/fetch/dist/index.js

A modern fetch wrapper with cookie support, written in TypeScript.

import { CookieJar } from "tough-cookie";
import fetchcookie from "fetch-cookie";
export class MyFetchError extends Error {
    constructor(status, finalUrl, responseBody) {
        super(`fetch failed...
      status: ${status}
      finalUrl: ${finalUrl}
      responseBody: ${responseBody}
      `);
        this.status = status;
        this.finalUrl = finalUrl;
        this.responseBody = responseBody;
    }
}
export default class MyFetch {
    constructor({ cookieJar = new CookieJar(), defaultHeaders = {} } = {}) {
        this.cookieJar = cookieJar;
        this.fetchCookie = fetchcookie(fetch, this.cookieJar);
        this.defaultHeaders = defaultHeaders;
    }
    async fetch(url, init) {
        try {
            const mergedHeaders = new Headers(this.defaultHeaders);
            if (init?.headers) {
                new Headers(init.headers).forEach((value, key) => {
                    mergedHeaders.set(key, value);
                });
            }
            const response = await this.fetchCookie(url, { ...init, headers: mergedHeaders });
            if (!response.ok) {
                throw new MyFetchError(response.status, response.url, await response.text());
            }
            return response;
        }
        catch (e) {
            if (e instanceof MyFetchError) {
                throw e;
            }
            else {
                const errorMessage = e instanceof Error ? e.message : String(e);
                throw new MyFetchError(1000, url.toString(), errorMessage);
            }
        }
    }
    static create({ cookieJar, defaultHeaders = {} } = {}) {
        const instance = new MyFetch({ cookieJar, defaultHeaders });
        const myFetch = instance.fetch.bind(instance);
        Object.assign(myFetch, instance);
        Object.setPrototypeOf(myFetch, MyFetch.prototype);
        return myFetch;
    }
    getCookieJar() {
        return this.cookieJar.serializeSync();
    }
    setCookieJar(cookieJar) {
        this.cookieJar = cookieJar;
        this.fetchCookie = fetchcookie(fetch, this.cookieJar);
    }
    getDefaultHeaders() {
        return this.defaultHeaders;
    }
    setDefaultHeaders(defaultHeaders) {
        this.defaultHeaders = defaultHeaders;
    }
}