node-fetch-cookies-rn
v1.3.1
Published
node-fetch wrapper that adds support for cookie-jars
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node-fetch-cookies-rn
A node-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.
This wrapper uses react-native-fs. Please follow their usage README to save cookies to storage.
For upgrading from 1.2.x or below to 1.3.x or above, please read the breaking API changes.
Usage Examples
with file...
import {fetch, CookieJar} from "node-fetch-cookies";
(async () => {
// creates a CookieJar instance
const cookieJar = new CookieJar("jar.json");
// load cookies from the cookie jar
await cookieJar.load();
// usual fetch usage, except with one or multiple cookie jars as first parameter
const response = await fetch(cookieJar, "https://example.com");
// save the received cookies to disk
await cookieJar.save();
})();
...or without
import {fetch, CookieJar} from "node-fetch-cookies";
(async () => {
const cookieJar = new CookieJar();
// log in to some api
let response = await fetch(cookieJar, "https://example.com/api/login", {
method: "POST",
body: "credentials"
});
// do some requests you require login for
response = await fetch(cookieJar, "https://example.com/api/admin/drop-all-databases");
// and optionally log out again
response = await fetch(cookieJar, "https://example.com/api/logout");
})();
Documentation
async fetch(cookieJars, url[, options])
cookieJars
A CookieJar instance, an array of CookieJar instances or null, if you don't want to send or store cookies.url
andoptions
as in https://github.com/bitinn/node-fetch#fetchurl-options
Returns a Promise resolving to a Response instance on success.
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 hostnames to maps, which map cookie names to the respective Cookie instance.
new CookieJar([file, flags = rw
, cookies, cookieIgnoreCallback])
file
An optional string containing a relative or absolute path to the file on the disk to use.flags
An optional string specifying whether cookies should be read and/or written from/to the jar when passing it as parameter to fetch. Default:rw
r
: only read from this jarw
: only write to this jarrw
orwr
: read/write from/to this jar
cookies
An optional initializer for the cookie jar - either an array of Cookie instances or a single Cookie instance.cookieIgnoreCallback(cookie, reason)
An optional callback function which will be called when a cookie is ignored instead of added to the cookie jar.cookie
The cookie stringreason
A string containing the reason why the cookie has been ignored
addCookie(cookie[, fromURL])
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 a serialized cookie received from a website. In this casefromURL
must be specified.fromURL
The url a cookie has been received from.
Returns true
if the cookie has been added successfully. Returns false
otherwise.
If the parser throws a CookieParseError it will be caught and a warning will be printed to console.
domains()
Returns an iterator over all domains currently stored cookies for.
*cookiesDomain(domain)
Returns an iterator over all cookies currently stored for domain
.
*cookiesValid(withSession)
Returns an iterator over all valid (non-expired) cookies.
withSession
: A boolean. Iterator will include session cookies if set totrue
.
*cookiesAll()
Returns an iterator over all cookies currently stored.
*cookiesValidForRequest(requestURL)
Returns an iterator over all cookies valid for a request to url
.
deleteExpired(sessionEnded)
Removes all expired cookies from the jar.
sessionEnded
: A boolean. Also removes session cookies if set totrue
.
async load([file = this.file])
Reads cookies from file
on the disk and adds the contained cookies.
file
: Path to the file where the cookies should be saved. Default:this.file
, the file that has been passed to the constructor.
async save([file = this.file])
Saves the cookie jar to file
on the disk. Only non-expired non-session cookies are saved.
file
: Path to the file where the cookies should be saved. Default:this.file
, the file that has been passed to the constructor.
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 ornull
, if the cookie expires with the session.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 forhttps
requests.subdomains
A boolean value specifying whether the cookie should be used for requests to subdomains ofdomain
or not.
new Cookie(str, requestURL)
Creates a cookie instance from the string representation of a cookie as send by a webserver.
str
The string representation of a cookie.url
The url the cookie has been received from.
Will throw a CookieParseError
if str
couldn't be parsed.
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(sessionEnded)
Returns whether the cookie has expired or not.
sessionEnded
: A boolean that specifies whether the current session has ended, meaning if set totrue
, the function will returntrue
for session cookies.
isValidForRequest(requestURL)
Returns whether the cookie is valid for a request to url
.
Class: CookieParseError
The Error that is thrown when the cookie parser located in the constructor of the Cookie class is unable to parse the input.
1.3.0 Breaking API Changes
new CookieJar(flags, file, cookies)
has been changed tonew CookieJar(file, flags = "rw", cookies)
.new CookieJar("rw")
can now be written asnew CookieJar()
,new CookieJar("rw", "jar.json")
can now be written asnew CookieJar("jar.json")
.
This change has been introduced to simplify the usage of this library, sincerw
is used forflags
in most cases anyways.CookieJar.addFromFile(file)
has been renamed to the async functionasync CookieJar.load([file = this.file])
, which uses the fsPromises API for non-blocking cookie loading.
The default value forfile
is the file passed to the constructor.CookieJar.save(file)
was moved toasync CookieJar.save([file = this.file])
now also uses the fsPromises API.new CookieJar()
now doesn't load cookies from the specified file anymore. To do so, callawait CookieJar.load()
after creating the CookieJar.
NOTE:CookieJar.load()
will throw an error if the cookie jar doesn't exist or doesn't contain valid JSON!
License
This project is licensed under the MIT license, see LICENSE.