
Intro
A lite request lib based on fetch with plugin support and similar API to axios.
Features:
- 🔥 Use fetch
- 🫡 Similar axios API:
axios.create
/ axios.interceptors
/ .get/post/put/patch/delete/head/options
- 🤙 Support timeout and cancel requests
- 🥷 Plugin support: error retry, cache, throttling, dedupe, error cache, mock and easily create custom plugins
- 🚀 Lightweight (~8KB, Gzip ~3kb)
- 👊 Unit tested and strongly typed 💪
Table of Contents
Getting Started
Installing
Package manager
npm install xior
pnpm add xior
bun add xior
yarn add xior
Use CDN
Since v0.2.1, xior support UMD format
Use jsDelivr CDN:
<script src="https://cdn.jsdelivr.net/npm/xior@0.5.5/dist/xior.umd.js"></script>
<script>
console.log(xior.VERSION);
xior.get('https://exmapledomain.com/api').then((res) => {
console.log(res.data);
});
</script>
Use unpkg CDN:
<script src="https://unpkg.com/xior@0.5.5/dist/xior.umd.js"></script>
<script>
xior.get('https://exmapledomain.com/api').then((res) => {
console.log(res.data);
});
</script>
Create instance
import xior from 'xior';
export const xiorInstance = xior.create({
baseURL: 'https://apiexampledomian.com/api',
headers: {
},
});
GET / POST / DELETE / PUT / PATCH / OPTIONS / HEAD
GET
HEAD
/ DELETE
/ OPTIONS
are same usage with GET
method
async function run() {
const { data } = await xiorInstance.get('/');
const { data: data2 } = await xiorInstance.get('/', { params: { a: 1, b: 2 } });
const { data: data3 } = await xiorInstance.get('/', {
params: { a: 1, b: 2 },
headers: {
'content-type': 'application/x-www-form-urlencoded',
},
});
const { data: data4 } = await xiorInstance.get<{ field1: string; field2: number }>('/');
}
POST
PUT
/PATCH
methods are same usage with POST
async function run() {
const { data: data3 } = await xiorInstance.post<{ field1: string; field2: number }>(
'/',
{ a: 1, b: '2' },
{
params: { id: 1 },
headers: {},
}
);
}
import xior from 'xior';
export const xiorInstance = xior.create({
baseURL: 'https://apiexampledomian.com/api',
});
function setAccessToken(token: string) {
xiorInstance.defaults.headers['Authorization'] = `Bearer ${token}`;
}
function removeUserToken() {
delete xiorInstance.defaults.headers['Authorization'];
}
import xior from 'xior';
const xiorInstance = xior.create({
baseURL: 'https://apiexampledomian.com/api',
});
const { data, headers } = await xiorInstance.get('/');
console.log(headers.get('X-Header-Name'));
Upload file
xior supports file uploads using the FormData
API and provides an optional 'xior/plugins/progress'
plugin for simulating upload progress, usage similar to Axios.
import Xior from 'xior';
import uploadDownloadProgressPlugin from 'xior/plugins/progress';
const http = Xior.create({});
http.plugins.use(
uploadDownloadProgressPlugin({
progressDuration: 5 * 1000,
})
);
const formData = FormData();
formData.append('file', fileObject);
formData.append('field1', 'val1');
formData.append('field2', 'val2');
http.post('/upload', formData, {
onUploadProgress(e) {
console.log(`Upload progress: ${e.progress}%`);
},
});
Using interceptors
xior supports interceptors similar to Axios, allowing you to modify requests and handle responses programmatically.
Request interceptors:
import xior, { merge } from 'xior';
const http = xior.create({
});
http.interceptors.request.use((config) => {
const token = localStorage.getItem('REQUEST_TOKEN');
if (!token) return config;
return merge(config, {
headers: {
Authorization: `Bearer ${token}`,
},
});
});
http.interceptors.request.use((config) => {
return config;
});
Response interceptors:
import xior, { merge } from 'xior';
const http = xior.create({});
http.interceptors.response.use(
(result) => {
const { data, request: config, response: originalResponse } = result;
return result;
},
async (error) => {
if (error instanceof TypeError) {
console.log(`Request error:`, error);
}
if (error?.response?.status === 401) {
localStorage.removeItem('REQUEST_TOKEN');
}
return Promise.reject(error);
}
);
Timeout and Cancel request
Timeout:
import xior from 'xior';
const instance = xior.create({
timeout: 120 * 1000,
});
await instance.post(
'http://httpbin.org',
{
a: 1,
b: 2,
},
{
timeout: 60 * 1000,
}
);
Cancel request:
import xior from 'xior';
const instance = xior.create();
const controller = new AbortController();
xiorInstance.get('http://httpbin.org', { signal: controller.signal }).then((res) => {
console.log(res.data);
});
class CancelRequestError extends Error {}
controller.abort(new CancelRequestError());
Encrypt and Decrypt Example
We can use interceptors easily to handle encrypt/decrypt.
Create encryption.ts
:
export const SECRET = '&*&*^SDxsdasdas776';
export function encrypt(data: string) {
return data + '____' + SECRET;
}
export function decrypt(data: string, s?: string) {
return data.replace('____' + (s || SECRET), '');
}
Create xior-instance.ts
:
import xior from 'xior';
import { SECRET, encrypt, decrypt } from './encryption';
export const instance = xior.create();
instance.interceptors.request.use((req) => {
req.headers['X'] = SECRET;
if (req.url && req.data) {
const result = JSON.stringify(req.data);
const blob = encrypt(result);
req.data = { blob };
}
return req;
});
instance.interceptors.response.use((res) => {
if (res.request.url && res.data?.blob) {
res.data = decrypt(res.data.blob);
try {
res.data = JSON.parse(res.data);
} catch (e) {
console.error(e);
}
}
return res;
});
Check test code in tests/src/tests/encrypt-decrypt/
Tips: Make your SSR(Server-side Rendering) app more stable and faster
How we do that? Use the xior's plugins:
- If
GET
data error, at least have chance to retry; - If retry still error, return the cache data(if have) to prevent page crash or show error page;
- Dedupe the
GET
requests - Throttle the
GET
requests - Return cache data first and run the fetching data task on the background
Example code:
import xior, { XiorError as AxiosError } from 'xior';
import errorRetryPlugin from 'xior/plugins/error-retry';
import dedupePlugin from 'xior/plugins/dedupe';
import throttlePlugin from 'xior/plugins/throttle';
import errorCachePlugin from 'xior/plugins/error-cache';
const http = axios.create({
baseURL: 'http://localhost:3000',
});
http.plugins.use(errorRetryPlugin());
http.plugins.use(errorCachePlugin());
http.plugins.use(dedupePlugin());
http.plugins.use(throttlePlugin());
const res = await http.get('/api/get-data');
if (res.fromCache) {
console.log(`the data from cahce`, res.cacheTime);
}
await Promise.all([
http.get('/api/get-data-2'),
http.get('/api/get-data-2'),
http.get('/api/get-data-2'),
]);
http.get('/api/get-some-big-data', { threshold: 10e3 });
http.get('/api/get-some-big-data', { threshold: 10e3, useCacheFirst: true });
Plugins
xior offers a variety of built-in plugins to enhance its functionality:
Usage:
import xior from 'xior';
import errorRetryPlugin from 'xior/plugins/error-retry';
import throttlePlugin from 'xior/plugins/throttle';
import cachePlugin from 'xior/plugins/cache';
import uploadDownloadProgressPlugin from 'xior/plugins/progress';
const http = xior.create();
http.plugins.use(errorRetryPlugin());
http.plugins.use(throttlePlugin());
http.plugins.use(cachePlugin());
http.plugins.use(uploadDownloadProgressPlugin());
Error retry plugin
Retry the failed request with special times
API:
function errorRetryPlugin(options: {
retryTimes?: number;
retryInterval?: number | ((errorCount: number) => number);
enableRetry?: boolean | (config: XiorRequestConfig, error: XiorError | Error) => boolean | undefined;
onRetry?: (config: XiorRequestConfig, error: XiorError | Error, count: number) => void;
}): XiorPlugin;
The options
object:
Param | Type | Default value | Description |
---|
retryTimes | number | 2 | Set the retry times for failed request |
retryInterval | number | ((errorCount: number, config: XiorRequestConfig, error: XiorError) => number) | 3000 | After first time retry, the next retries interval time, default interval is 3 seconds; you can use function as param to return interval number too |
enableRetry | boolean | ((config: XiorRequestConfig, error: XiorError | Error) => boolean | undefined) | (config, error) => config.method === 'GET' || config.isGet | Default only retry if GET request error and retryTimes > 0 |
onRetry | boolean | ((config: XiorRequestConfig, error: XiorError | Error, count: number) => void) | undefined | For log retry info |
Basic usage:
import xior from 'xior';
import errorRetryPlugin from 'xior/plugins/error-retry';
const http = xior.create();
http.plugins.use(
errorRetryPlugin({
retryTimes: 3,
retryInterval(count, config, error) {
return count * 1e3;
},
onRetry(config, error, count) {
console.log(`${config.method} ${config.url} retry ${count} times`);
},
})
);
http.get('/api1');
http.get('/api2', { retryTimes: 0 });
http.post('/api1');
http.post('/api1', null, { retryTimes: 5, enableRetry: true });
Advance usage:
The retry key for the unique request generated by use params
and data
, if your request depends on headers
, you can add request interceptor to add headers's value to params
:
import xior from 'xior';
import errorRetryPlugin from 'xior/plugins/error-retry';
const http = xior.create();
http.plugins.use(errorRetryPlugin());
http.interceptors.request.use((config) => {
config.params['___k'] = `${config.headers['x-custom-field'] || ''}`;
return config;
});
Use CDN:
Using jsDelivr CDN:
<script src="https://cdn.jsdelivr.net/npm/xior@0.5.5/dist/xior.umd.js"></script>
<script src="https://cdn.jsdelivr.net/npm/xior@0.5.5/plugins/error-retry.umd.js"></script>
<script>
console.log(xior.VERSION);
xior.plugins.use(xiorErrorRetry());
</script>
Using unpkg CDN:
<script src="https://unpkg.com/xior@0.5.5/dist/xior.umd.js"></script>
<script src="https://unpkg.com/xior@0.5.5/plugins/error-retry.umd.js"></script>
<script>
console.log(xior.VERSION);
xior.plugins.use(xiorErrorRetry());
</script>
Request throttle plugin
Throttle GET requests(or custom) most once per threshold milliseconds, filter repeat requests in certain time.
API:
function throttleRequestPlugin(options: {
/** threshold in milliseconds, default: 1000ms */
threshold?: number;
/**
* check if we need enable throttle, default only `GET` method or`isGet: true` enable
*/
enableThrottle?: boolean | ((config?: XiorRequestConfig) => boolean | undefined);
throttleCache?: ICacheLike<RecordedCache>;
onThrottle?: (config: XiorRequestConfig) => void;
throttleItems?: number;
}): XiorPlugin;
The options
object:
You can override default value in each request's own config (Except throttleCache
)
Param | Type | Default value | Description |
---|
threshold | number | 1000 | The number of milliseconds to throttle request invocations to |
enableThrottle | boolean | ((config: XiorRequestConfig) => boolean | undefined) | (config) => config.method === 'GET' || config.isGet | Default only enabled in GET request |
throttleCache | CacheLike | lru(100) | CacheLike instance that will be used for storing throttled requests, use tiny-lru module |
throttleItems | number | 100 | The max number of throttle items in the default LRU cache |
Basic usage:
import xior from 'xior';
import throttlePlugin from 'xior/plugins/throttle';
const http = xior.create();
http.plugins.use(
throttlePlugin({
onThrottle(config) {
console.log(`Throttle requests ${config.method} ${config.url}`);
},
})
);
http.get('/');
http.get('/');
http.get('/');
http.get('/', { throttle: 2e3 });
http.post('/');
http.post('/');
http.post('/');
http.post('/', null, {
enableThrottle: true,
});
http.post('/', null, {
enableThrottle: true,
});
http.post('/', null, {
enableThrottle: true,
});
http.post('/get', null, {
isGet: true,
});
http.post('/get', null, {
isGet: true,
});
http.post('/get', null, {
isGet: true,
});
Use CDN:
Using jsDelivr CDN:
<script src="https://cdn.jsdelivr.net/npm/xior@0.5.5/dist/xior.umd.js"></script>
<script src="https://cdn.jsdelivr.net/npm/xior@0.5.5/plugins/throttle.umd.js"></script>
<script>
console.log(xior.VERSION);
xior.plugins.use(xiorThrottle());
</script>
Using unpkg CDN:
<script src="https://unpkg.com/xior@0.5.5/dist/xior.umd.js"></script>
<script src="https://unpkg.com/xior@0.5.5/plugins/throttle.umd.js"></script>
<script>
console.log(xior.VERSION);
xior.plugins.use(xiorThrottle());
</script>
Request dedupe plugin
Prevents having multiple identical requests on the fly at the same time.
API:
function dedupeRequestPlugin(options: {
/**
* check if we need enable dedupe, default only `GET` method or`isGet: true` enable
*/
enableDedupe?: boolean | ((config?: XiorRequestConfig) => boolean);
onDedupe?: (config: XiorRequestConfig) => void;
}): XiorPlugin;
Basic usage:
import xior from 'xior';
import dedupePlugin from 'xior/plugins/dedupe';
const http = xior.create();
http.plugins.use(
dedupePlugin({
onDedupe(config) {
console.log(`Dedupe ${config.method} ${config.url}`);
},
})
);
http.get('/');
http.get('/');
http.get('/');
http.post('/');
http.post('/');
http.post('/');
Use CDN:
Using jsDelivr CDN:
<script src="https://cdn.jsdelivr.net/npm/xior@0.5.5/dist/xior.umd.js"></script>
<script src="https://cdn.jsdelivr.net/npm/xior@0.5.5/plugins/dedupe.umd.js"></script>
<script>
console.log(xior.VERSION);
xior.plugins.use(xiorDedupe());
</script>
Using unpkg CDN:
<script src="https://unpkg.com/xior@0.5.5/dist/xior.umd.js"></script>
<script src="https://unpkg.com/xior@0.5.5/plugins/dedupe.umd.js"></script>
<script>
console.log(xior.VERSION);
xior.plugins.use(xiorDedupe());
</script>
Error cache plugin
When request error, if have cached data then use the cached data
API:
function errorCachePlugin(options: {
enableCache?: boolean | ((config?: XiorRequestConfig) => boolean | undefined);
defaultCache?: ICacheLike<XiorPromise>;
useCacheFirst?: boolean;
}): XiorPlugin;
The options
object:
Param | Type | Default value | Description |
---|
enableCache | boolean | ((config: XiorRequestConfig) => boolean | undefined) | (config) => config.method === 'GET' || config.isGet | Default only enabled in GET request |
defaultCache | CacheLike | lru(100, 0) | will used for storing requests by default, except you define a custom Cache with your request config, use tiny-lru module |
useCacheFirst | boolean | false | If useCacheFirst: true and there's a cache, it will return the cached response first, then run fetching task on the background. This is useful when the response takes a long time, and the data is unnecessary in real-time. |
cacheItems | number | 100 | The max number of error cache items in the default LRU cache |
Basic usage:
import xior from 'xior';
import errorCachePlugin from 'xior/plugins/error-cache';
const http = xior.create();
http.plugins.use(errorCachePlugin({}));
http.get('/users');
const res = await http.get('/users');
if (res.fromCache) {
console.log('data from cache!');
console.log('data cache timestamp: ', res.cacheTime);
console.log('error', res.error);
}
http.post('/users');
http.post('/users', { isGet: true });
Use CDN:
Using jsDelivr CDN:
<script src="https://cdn.jsdelivr.net/npm/xior@0.5.5/dist/xior.umd.js"></script>
<script src="https://cdn.jsdelivr.net/npm/xior@0.5.5/plugins/error-cache.umd.js"></script>
<script>
console.log(xior.VERSION);
xior.plugins.use(xiorErrorCache());
</script>
Using unpkg CDN:
<script src="https://unpkg.com/xior@0.5.5/dist/xior.umd.js"></script>
<script src="https://unpkg.com/xior@0.5.5/plugins/error-cache.umd.js"></script>
<script>
console.log(xior.VERSION);
xior.plugins.use(xiorErrorCache());
</script>
Cache plugin
Makes xior cacheable
Good to Know: Next.js already support cache for fetch in server side. More detail
Different with error-cache
plugin: this plugin will use the data in cache if the cache data not expired.
API:
function cachePlugin(options: {
enableCache?: boolean | ((config?: XiorRequestConfig) => boolean);
defaultCache?: ICacheLike<XiorPromise>;
cacheItems?: number;
}): XiorPlugin;
The options
object:
Param | Type | Default value | Description |
---|
enableCache | boolean | ((config: XiorRequestConfig) => boolean | undefined) | (config) => config.method === 'GET' || config.isGet | Default only enabled in GET request |
defaultCache | CacheLike | lru(100, 1000*60*5) | will used for storing requests by default, except you define a custom Cache with your request config, use tiny-lru module |
cacheItems | number | 100 | Custom the default LRU cache numbers |
cacheTime | number | 1000 * 60 * 5 | Custom the default LRU cache time |
Basic usage:
import xior from 'xior';
import cachePlugin from 'xior/plugins/cache';
const http = xior.create();
http.plugins.use(
cachePlugin({
cacheItems: 100,
cacheTime: 1e3 * 60 * 5,
})
);
http.get('/users');
http.get('/users');
http.get('/users', { enableCache: false });
http.post('/users');
http.post('/users', { enableCache: true });
const res = await http.post('/users', { enableCache: true });
if (res.fromCache) {
console.log('data from cache!', res.cacheTime);
}
Advanced:
import xior from 'xior';
import cachePlugin from 'xior/plugins/cache';
import { lru } from 'tiny-lru';
const http = xior.create({
baseURL: 'https://example-domain.com/api',
headers: { 'Cache-Control': 'no-cache' },
});
http.plugins.use(
cachePlugin({
enableCache: false,
cacheItems: 1000,
cacheTime: 1e3 * 60 * 10,
})
);
http.get('/users', { enableCache: true });
http.get('/users', { enableCache: true });
const cacheA = lru(100);
http.get('/users', { enableCache: true, defaultCache: cacheA, forceUpdate: true });
Upload and download progress plugin
Enable upload and download progress like axios, but the progress is simulated,
This means it doesn't represent the actual progress but offers a user experience similar to libraries like axios.
API:
function progressPlugin(options: {
/** default: 5*1000 ms */
progressDuration?: number;
}): XiorPlugin;
The options
object:
Param | Type | Default value | Description |
---|
progressDuration | number | 5000 | The upload or download progress grow to 99% duration |
Basic usage:
import xior from 'xior';
import uploadDownloadProgressPlugin from 'xior/plugins/progress';
const http = xior.create({});
http.plugins.use(uploadDownloadProgressPlugin());
const formData = FormData();
formData.append('file', fileObject);
formData.append('field1', 'val1');
formData.append('field2', 'val2');
http.post('/upload', formData, {
progressDuration: 10 * 1000,
onUploadProgress(e) {
console.log(`Upload progress: ${e.progress}%`);
},
});
Use CDN:
Using jsDelivr CDN:
<script src="https://cdn.jsdelivr.net/npm/xior@0.5.5/dist/xior.umd.js"></script>
<script src="https://cdn.jsdelivr.net/npm/xior@0.5.5/plugins/progress.umd.js"></script>
<script>
console.log(xior.VERSION);
xior.plugins.use(xiorProgress());
</script>
Using unpkg CDN:
<script src="https://unpkg.com/xior@0.5.5/dist/xior.umd.js"></script>
<script src="https://unpkg.com/xior@0.5.5/plugins/progress.umd.js"></script>
<script>
console.log(xior.VERSION);
xior.plugins.use(xiorProgress());
</script>
Mock plugin
This plugin let you eaisly mock requests
Usage:
with GET
:
import xior from 'xior';
import MockPlugin from 'xior/plugins/mock';
const instance = xior.create();
const mock = new MockPlugin(instance);
mock.onGet('/users').reply(
200,
{
users: [{ id: 1, name: 'John Smith' }],
},
{
'X-Custom-Response-Header': '123',
}
);
instance.get('/users').then(function (response) {
console.log(response.data);
console.log(response.headers.get('X-Custom-Response-Header'));
});
mock.onGet('/users', { params: { searchText: 'John' } }).reply(200, {
users: [{ id: 1, name: 'John Smith' }],
});
instance.get('/users', { params: { searchText: 'John' } }).then(function (response) {
console.log(response.data);
});
with POST
:
import xior from 'xior';
import MockPlugin from 'xior/plugins/mock';
const instance = xior.create();
const mock = new MockPlugin(instance);
mock.onPost('/users').reply(
200,
{
users: [{ id: 1, name: 'John Smith' }],
},
{
'X-Custom-Response-Header': '123',
}
);
instance.post('/users').then(function (response) {
console.log(response.data);
console.log(response.headers.get('X-Custom-Response-Header'));
});
mock.onPost('/users', null, { params: { searchText: 'John' } }).reply(200, {
users: [{ id: 1, name: 'John Smith' }],
});
instance.get('/users', null, { params: { searchText: 'John' } }).then(function (response) {
console.log(response.data);
});
mock.onPost('/users', { searchText: 'John' }).reply(200, {
users: [{ id: 1, name: 'John Smith' }],
});
instance.get('/users', { searchText: 'John' }).then(function (response) {
console.log(response.data);
});
More details, check here.
Use CDN:
Using jsDelivr CDN:
<script src="https://cdn.jsdelivr.net/npm/xior@0.5.5/dist/xior.umd.js"></script>
<script src="https://cdn.jsdelivr.net/npm/xior@0.5.5/plugins/mock.umd.js"></script>
<script>
console.log(xior.VERSION);
const mock = new xiorMock(xior);
</script>
Using unpkg CDN:
<script src="https://unpkg.com/xior@0.5.5/dist/xior.umd.js"></script>
<script src="https://unpkg.com/xior@0.5.5/plugins/mock.umd.js"></script>
<script>
console.log(xior.VERSION);
const mock = new xiorMock(xior);
</script>
We will use xior-auth-refresh
plugin from the community: https://github.com/Audiu/xior-auth-refresh
Install:
npm install xior-auth-refresh --save
yarn add xior-auth-refresh
pnpm add xior-auth-refresh
Usage:
import xior from 'xior';
import createAuthRefreshInterceptor from 'xior-auth-refresh';
const refreshAuthLogic = (failedRequest) =>
xior.post('https://www.example.com/auth/token/refresh').then((tokenRefreshResponse) => {
localStorage.setItem('token', tokenRefreshResponse.data.token);
failedRequest.response.config.headers['Authorization'] =
'Bearer ' + tokenRefreshResponse.data.token;
return Promise.resolve();
});
createAuthRefreshInterceptor(xior, refreshAuthLogic);
xior.get('https://www.example.com/restricted/area').then().catch();
More: https://github.com/Audiu/xior-auth-refresh
Auth refresh token plugin(built-in)
Usage:
import xior, { XiorResponse } from 'xior';
import errorRetry from 'xior/plugins/error-retry';
import setupTokenRefresh from 'xior/plugins/token-refresh';
const instance = xior.create();
const TOKEN_KEY = 'TOKEN';
function getToken() {
return localStorage.getItem(TOKEN_KEY);
}
function setToken(token: string) {
return localStorage.setItem(TOKEN_KEY, token);
}
function deleteToken() {
return localStorage.getItem(TOKEN_KEY);
}
instance.interceptors.request.use((config) => {
const token = getToken();
if (token) {
config.headers['Authorization'] = `Bearer ${token}`;
}
return config;
});
function shouldRefresh(response: XiorResponse) {
const token = getToken();
return Boolean(token && response?.status && [401, 403].includes(response.status));
}
instance.plugins.use(
errorRetry({
enableRetry: (config, error) => {
if (error?.response && shouldRefresh(error.response)) {
return true;
}
},
})
);
setupTokenRefresh(http, {
shouldRefresh,
async refreshToken(error) {
try {
const { data } = await http.post('/token/new');
if (data.token) {
setToken(data.token);
} else {
throw error;
}
} catch (e) {
deleteToken();
return Promise.reject(error);
}
},
});
Create your own custom plugin
xior let you easily to create custom plugins.
Here are examples:
- Simple Logging plugin:
import xior from 'xior';
const instance = xior.create();
instance.plugins.use(function logPlugin(adapter, instance) {
return async (config) => {
const start = Date.now();
const res = await adapter(config);
console.log('%s %s %s take %sms', config.method, config.url, res.status, Date.now() - start);
return res;
};
});
- Check built-in plugins get more inspiration:
Check src/plugins
Helper functions
xior has built-in helper functions, may useful for you:
import lru from 'tiny-lru';
import {
encodeParams,
merge as deepMerge,
delay as sleep,
buildSortedURL,
isAbsoluteURL,
joinPath,
isXiorError,
trimUndefined,
Xior,
} from 'xior';
FAQ
xior frequently asked questions.
1. Is xior 100% compatiable with axios
?
No, but xior offers a similar API like axios: axios.create
/ axios.interceptors
/ .get/post/put/patch/delete/head/options
.
2. Can I use xior in projects like Bun, Expo, React Native, RemixJS, Next.js, Vue, or Nuxt.js?
Yes, xior works anywhere where the native fetch
API is supported.
Even if the environment doesn't support fetch
, you can use a fetch
polyfill like for older browsers.
3. How do I handle responses with types like 'stream'
, 'document'
, 'arraybuffer'
, or 'blob'
?
When {responseType: 'blob'| 'arraybuffer'}
:
xior.get('https://exmaple.com/some/api', { responseType: 'blob' }).then((response) => {
console.log(response.data);
});
fetch('https://exmaple.com/some/api')
.then((response) => response.blob())
.then((data) => {
console.log(data);
});
xior.get('https://exmaple.com/some/api', { responseType: 'arraybuffer' }).then((response) => {
console.log(response.data);
});
fetch('https://exmaple.com/some/api')
.then((response) => response.arraybuffer())
.then((data) => {
console.log(data);
});
But when responseType
set to 'stream', 'document' or 'original'
, Xior will return the original fetch response:
fetch('https://exmaple.com/some/api').then((response) => {
console.log(response);
});
xior.get('https://exmaple.com/some/api', { responseType: 'stream' }).then((res) => {
console.log(res.response);
});
And to handle a stream response, use the responseType: 'stream'
option in your request, then do something with the response
as fetch
does:
import xior from 'xior';
const http = xior.create({ baseURL });
const { response } = await http.post<{ file: any; body: Record<string, string> }>(
'/stream/10',
null,
{ responseType: 'stream' }
);
const reader = response.body!.getReader();
let chunk;
for await (chunk of readChunks(reader)) {
console.log(`received chunk of size ${chunk.length}`);
}
5. How do I support older browsers?
You can use a polyfill for the fetch
API. Check the file src/tests/polyfill.test.ts
for a potential example.
6. Why is xior named "xior"?
The original name axior
was unavailable on npm, so when removed the "a": axior.
7. Where can I ask additional questions?
If you have any questions, feel free to create issues.
Migrate from axios
to xior
GET
axios:
import axios from 'axios';
axios
.get('/user?ID=12345')
.then(function (response) {
console.log(response);
})
.catch(function (error) {
console.log(error);
})
.finally(function () {
});
axios
.get('/user', {
params: {
ID: 12345,
},
})
.then(function (response) {
console.log(response);
})
.catch(function (error) {
console.log(error);
})
.finally(function () {
});
async function getUser() {
try {
const response = await axios.get('/user?ID=12345');
console.log(response);
} catch (error) {
console.error(error);
}
}
xior:
import axios from 'xior';
axios
.get('/user?ID=12345')
.then(function (response) {
console.log(response);
})
.catch(function (error) {
console.log(error);
})
.finally(function () {
});
axios
.get('/user', {
params: {
ID: 12345,
},
})
.then(function (response) {
console.log(response);
})
.catch(function (error) {
console.log(error);
})
.finally(function () {
});
async function getUser() {
try {
const response = await axios.get('/user?ID=12345');
console.log(response);
} catch (error) {
console.error(error);
}
}
POST
axios:
import axios from 'axios';
axios
.post('/user', {
firstName: 'Fred',
lastName: 'Flintstone',
})
.then(function (response) {
console.log(response);
})
.catch(function (error) {
console.log(error);
});
xior:
import axios from 'xior';
axios
.post('/user', {
firstName: 'Fred',
lastName: 'Flintstone',
})
.then(function (response) {
console.log(response);
})
.catch(function (error) {
console.log(error);
});
axios(requestObj)
: axios({ method: 'get', params: { a: 1 } })
axios:
import axios from 'axios';
await axios({ method: 'get', params: { a: 1 } });
xior:
import xior from 'xior';
const axios = xior.create();
await axios.request({ method: 'get', params: { a: 1 } });
Creating an instance
axios:
import axios from 'axios';
const instance = axios.create({
baseURL: 'https://some-domain.com/api/',
timeout: 1000,
headers: { 'X-Custom-Header': 'foobar' },
});
xior:
import axios from 'xior';
const instance = axios.create({
baseURL: 'https://some-domain.com/api/',
timeout: 1000,
headers: { 'X-Custom-Header': 'foobar' },
});
axios:
import axios from 'axios';
const axiosInstance = axios.create({
baseURL: 'https://apiexampledomian.com/api',
});
const { data, headers } = await axiosInstance.get('/');
console.log(headers['X-Header-Name']);
xior:
import xior from 'xior';
const xiorInstance = xior.create({
baseURL: 'https://apiexampledomian.com/api',
});
const { data, headers } = await xiorInstance.get('/');
console.log(headers.get('X-Header-Name'));
Download file with responseType: 'stream' | 'blob'
axios:
import axios from 'axios';
import fs from 'fs';
axios({
method: 'get',
url: 'https://bit.ly/2mTM3nY',
responseType: 'stream',
}).then(function (response) {
response.data.pipe(fs.createWriteStream('ada_lovelace.jpg'));
});
axios({
method: 'get',
url: 'https://bit.ly/2mTM3nY',
responseType: 'blob',
}).then(function (response) {
const href = URL.createObjectURL(response.data);
const link = document.createElement('a');
link.href = href;
link.setAttribute('download', 'file.pdf');
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
URL.revokeObjectURL(href);
});
xior:
import xior from 'xior';
const axios = xior.create();
axios
.get('https://bit.ly/2mTM3nY', {
responseType: 'stream',
})
.then(async function ({ response, config }) {
const buffer = Buffer.from(await response.arrayBuffer());
return writeFile('ada_lovelace.jpg', buffer);
});
xior
.get('https://d2l.ai/d2l-en.pdf', {
headers: {
Accept: 'application/pdf',
},
responseType: 'blob',
})
.then((res) => {
const { data: blob } = res;
var url = window.URL.createObjectURL(blob);
var a = document.createElement('a');
a.href = url;
a.download = 'filename.pdf';
document.body.appendChild(a);
a.click();
a.remove();
});
Use stream
axios:
import axios from 'axios';
import { Readable } from 'stream';
const http = axios.create();
async function getStream(url: string, params: Record<string, any>) {
const { data } = await http.get(url, {
params,
responseType: 'stream',
});
return data;
}
xior:
import axxios from 'xior';
import { Readable } from 'stream';
const http = axios.create();
async function getStream(url: string, params: Record<string, any>) {
const { response } = await http.get(url, {
params,
responseType: 'stream',
});
const stream = convertResponseToReadable(response);
return stream;
}
function convertResponseToReadable(response: Response): Readable {
const reader = response.body.getReader();
return new Readable({
async read() {
const { done, value } = await reader.read();
if (done) {
this.push(null);
} else {
this.push(Buffer.from(value));
}
},
});
}
Migrate from fetch
to xior
GET
fetch:
async function logMovies() {
const response = await fetch('http://example.com/movies.json?page=1&perPage=10');
const movies = await response.json();
console.log(movies);
}
xior:
import xior from 'xior';
const http = xior.create({
baseURL: 'http://example.com',
});
async function logMovies() {
const { data: movies } = await http.get('/movies.json', {
params: {
page: 1,
perPage: 10,
},
});
console.log(movies);
}
POST
fetch:
async function postData(url = '', data = {}) {
const response = await fetch(url, {
method: 'POST',
mode: 'cors',
cache: 'no-cache',
credentials: 'same-origin',
headers: {
},
redirect: 'follow',
referrerPolicy: 'no-referrer',
body: JSON.stringify(data),
});
return response.json();
}
postData('https://example.com/answer', { answer: 42 }).then((data) => {
console.log(data);
});
xior:
import xior from 'xior';
const http = xior.create({
baseURL: 'http://example.com',
});
http
.post(
'/answer',
{ answer: 42 },
{
mode: 'cors',
cache: 'no-cache',
credentials: 'same-origin',
headers: {
},
redirect: 'follow',
referrerPolicy: 'no-referrer',
}
)
.then(({ data }) => {
console.log(data);
});
Abort a fetch
fetch:
const controller = new AbortController();
const signal = controller.signal;
const url = 'video.mp4';
const downloadBtn = document.querySelector('#download');
const abortBtn = document.querySelector('#abort');
downloadBtn.addEventListener('click', async () => {
try {
const response = await fetch(url, { signal });
console.log('Download complete', response);
} catch (error) {
console.error(`Download error: ${error.message}`);
}
});
abortBtn.addEventListener('click', () => {
controller.abort();
console.log('Download aborted');
});
xior:
import xior from 'xior';
const http = xior.create();
const controller = new AbortController();
const signal = controller.signal;
const url = 'video.mp4';
const downloadBtn = document.querySelector('#download');
const abortBtn = document.querySelector('#abort');
downloadBtn.addEventListener('click', async () => {
try {
const response = await http.get(url, { signal });
console.log('Download complete', response);
} catch (error) {
console.error(`Download error: ${error.message}`);
}
});
abortBtn.addEventListener('click', () => {
controller.abort();
console.log('Download aborted');
});
Sending a request with credentials included
fetch:
fetch('https://example.com', {
credentials: 'include',
});
xior:
import xior from 'xior';
const http = xior.create();
http.get('https://example.com', {
credentials: 'include',
});
Uploading a file
fetch:
async function upload(formData) {
try {
const response = await fetch('https://example.com/profile/avatar', {
method: 'PUT',
body: formData,
});
const result = await response.json();
console.log('Success:', result);
} catch (error) {
console.error('Error:', error);
}
}
const formData = new FormData();
const fileField = document.querySelector('input[type="file"]');
formData.append('username', 'abc123');
formData.append('avatar', fileField.files[0]);
upload(formData);
xior:
import xior from 'xior';
const http = xior.create({
baseURL: 'https://example.com',
});
async function upload(formData) {
try {
const { data: result } = await http.put('/profile/avatar', formData);
console.log('Success:', result);
} catch (error) {
console.error('Error:', error);
}
}
const formData = new FormData();
const fileField = document.querySelector('input[type="file"]');
formData.append('username', 'abc123');
formData.append('avatar', fileField.files[0]);
upload(formData);
Processing a text file line by line
fetch:
async function* makeTextFileLineIterator(fileURL) {
const utf8Decoder = new TextDecoder('utf-8');
const response = await fetch(fileURL);
const reader = response.body.getReader();
let { value: chunk, done: readerDone } = await reader.read();
chunk = chunk ? utf8Decoder.decode(chunk) : '';
const newline = /\r?\n/gm;
let startIndex = 0;
let result;
while (true) {
const result = newline.exec(chunk);
if (!result) {
if (readerDone) break;
const remainder = chunk.substr(startIndex);
({ value: chunk, done: readerDone } = await reader.read());
chunk = remainder + (chunk ? utf8Decoder.decode(chunk) : '');
startIndex = newline.lastIndex = 0;
continue;
}
yield chunk.substring(startIndex, result.index);
startIndex = newline.lastIndex;
}
if (startIndex < chunk.length) {
yield chunk.substr(startIndex);
}
}
async function run() {
for await (const line of makeTextFileLineIterator(urlOfFile)) {
processLine(line);
}
}
run();
xior:
Good to Know: add {responseType: 'stream'}
options will tell xior no need process response, and return original response in format {response}
import xior from 'xior';
const http = xior.create();
async function* makeTextFileLineIterator(fileURL) {
const utf8Decoder = new TextDecoder('utf-8');
const { response } = await http.get(fileURL, { responseType: 'stream' });
const reader = response.body.getReader();
let { value: chunk, done: readerDone } = await reader.read();
chunk = chunk ? utf8Decoder.decode(chunk) : '';
const newline = /\r?\n/gm;
let startIndex = 0;
let result;
while (true) {
const result = newline.exec(chunk);
if (!result) {
if (readerDone) break;
const remainder = chunk.substr(startIndex);
({ value: chunk, done: readerDone } = await reader.read());
chunk = remainder + (chunk ? utf8Decoder.decode(chunk) : '');
startIndex = newline.lastIndex = 0;
continue;
}
yield chunk.substring(startIndex, result.index);
startIndex = newline.lastIndex;
}
if (startIndex < chunk.length) {
yield chunk.substr(startIndex);
}
}
async function run() {
for await (const line of makeTextFileLineIterator(urlOfFile)) {
processLine(line);
}
}
run();
Star History

Thanks
Without the support of these resources, xior wouldn't be possible: