flumm-fetch-cookies

A flumm-fetch wrapper with support for cookies. It supports reading/writing from/to a JSON cookie jar and keeps cookies in memory until you call CookieJar.save() to reduce disk I/O.

Usage Example

import {fetch, CookieJar} from "flumm-fetch-cookies";

(async () => {
    // creates a CookieJar instance
    let cookieJar = new CookieJar("rw", "jar.json");

    // usual fetch usage, except with one or multiple cookie jars as first parameter
    const response = await fetch(cookieJar, "https://google.de");

    // save the received cookies to disk
    cookieJar.save();
})();

Documentation

fetch(cookieJar, url, options)

• cookieJar A CookieJar instance, an array of CookieJar instances or null, if you don't want to send or store cookies.
• url and options as in https://github.com/bitinn/node-fetch#fetchurl-options

Class: CookieJar

A class that stores cookies.

Properties

• flags The read/write flags as specified below.
• file The path of the cookie jar on the disk.
• cookies A Map mapping cookie names to their properties.

new CookieJar(flags[, file, cookies])

• flags A string specifying whether cookies should be read and/or written from/to the jar when passing it as parameter to fetch.
  • r: only read from this jar
  • w: only write to this jar
  • rw or wr: read/write from/to this jar
• file An optional string containing a relative or absolute path to the file on the disk to use.
• cookies An optional initializer for the cookie jar - either an array of Cookie instances or a single Cookie instance.

addCookie(cookie[, url])

Adds a cookie to the jar.

• cookie A Cookie instance to add to the cookie jar. Alternatively this can also be a string, for example the string received from a website. In this case url should be specified.
• url The url a cookie has been received from.

forEach(callback)

Just a wrapper for CookieJar.cookies.forEach(callback).

save()

Saves the cookie jar to disk. Only non-expired cookies are saved.

Class: Cookie

An abstract representation of a cookie.

Properties

• name The identifier of the cookie.
• value The value of the cookie.
• expiry A Date object of the cookies expiry date.
• domain The domain the cookie is valid for.
• path The path the cookie is valid for.
• secure A boolean value representing the cookie's secure attribute. If set the cookie will only be used for https requests.
• subdomains A boolean value specifying whether the cookie should be used for subdomains of the domain or not.

new Cookie(cookie, url)

• cookie The string representation of a cookie as send by a webserver.
• url The url the cookie has been received from.

static fromObject(obj)

Creates a cookie instance from an already existing object with the same properties.

serialize()

Serializes the cookie, transforming it to name=value so it can be used in requests.

hasExpired()

Returns whether the cookie has expired or not.

isValidForRequest(url)

Returns whether the cookie is valid for a request to url. If not, it won't be send by the fetch wrapper.

License

This project is licensed under the MIT license, see LICENSE.