RETCHful

RETCHful is three simple functions that make doing REST calls more reliable and enjoyable than using fetch directly. It works on both client and server.

API

retch.get(url[, options]) Sends an HTTP GET for all resources. Get a specific resource by setting the id option. Optionally attach query params by setting query in options.

retch.save(url[, options]) Sends an HTTP POST if there is no id. If there is an id, then it'll PUT. If id has a different name configure it using the altId option.

retch.delete(url, {id}) Sends an HTTP DELETE. You must include the id option.

url A string. Do not include the id of the resource; it will be taken from options. Ending with or without "/" is okay.

options Pass-through to fetch's init arg with a few things to be aware of:

• body is stringified for you.
• method is set based on the function used (see above).
• query (RETCHful only) Key-value object added non-destructively to url as a query string. Primarily for get, but works with all.
• id (RETCHful only) A number or string. If present, will be appended to url. Required by delete and used by get to fetch a single resource rather than all. save ignores this and instead looks at body for the id of the resource (see altId for more info).
• altId (RETCHful only) Specify an alternative name for the id property of body. Save uses this name or defaults to body.id.

Notes

The get, save, and delete functions ultimately call fetch and return the Promise from response.json(). Internally response.ok is checked for you and if not ok the Promise is rejected. Also, the default values used for init can be seen here: https://github.com/jfbrennan/retch/blob/master/index.js#L34

Examples

// Require it server-side or use the `retch` global in the browser
const retch = require('retchful');

// Todos endpoint
const url = 'https://jsonplaceholder.typicode.com/todos';

// Fetch all todos
// GET https://jsonplaceholder.typicode.com/todos
retch.get(url)
    .then(data => console.log(data)) 

// Fetch todos with query params
// GET https://jsonplaceholder.typicode.com/todos?completed=false
retch.get(url, {query: {completed: false}})
    .then(data => console.log(data)) 

// Fetch a specific todo
// GET https://jsonplaceholder.typicode.com/todos/1
retch.get(url, {id: '1'})
    .then(data => console.log(data)) 

// Save a new todo
// POST https://jsonplaceholder.typicode.com/todos
retch.save(url, {body: {title: 'Foo', body: 'Bar'}})
    .then(data => console.log(data)) 

// Save changes to an existing todo
// PUT https://jsonplaceholder.typicode.com/todos/1
retch.save(url, {body: {id: '1', title: 'Foo', body: 'Baz'}})
    .then(data => console.log(data)) 

// Save changes to todo when id is not named "id"
// PUT https://jsonplaceholder.typicode.com/todos/1
retch.save(url, {altId: 'todo_id', body: {todo_id: '1', title: 'Foo', body: 'Baz'}})
    .then(data => console.log(data)) 

// Delete a todo
// DELETE https://jsonplaceholder.typicode.com/todos/1
retch.delete(url, {id: '1'})
    .then(data => console.log(data)) 

Installation

CDN

https://unpkg.com/[email protected]/dist/min.js

Then just use the global retch.get|save|delete functions. Too easy.

Note that RETCHful makes use of fetch, Promise, URL, and URLSearchParams.append, so you may need to polyfill for older browsers. The excellent polyfill.io service is a really smart way to go.

NPM

npm install retchful

Note that retch makes use of fetch, which needs to be installed for Node. The node-fetch module is recommended.

Credits

Fetch is a low level API, so it gets ugly when used directly. I took some inspiration from Backbone which imo is one of the most developer-friendly libraries ever. It's still the best when working with lots of a RESTful APIs, so retch attempts to give you some of that goodness.