Send multiple HTTP REST requests in a single request and get aggregated response. Just 3kb.
A typical web application generally needs to sends multiple HTTP REST requests one by one and then process their response. Managing multiple promise callbacks is tedious.
That's why frest.js exists.
You can get it on npm.
npm install frestjs --save
Or if you're not into package management, just download a ZIP file.
First, include the script located on the dist folder.
<script src="node_modules/frestjs/dist/frest.js"></script>Or you can use CDN Server
There are situation when one HTTP REST APIs response needs to be processed to get some parameter and this parameter needs to be passed to next HTTP REST requests.
casecaded() function does this for you.
function casecaded() {
var requests = [
{
url: 'https://jsonplaceholder.typicode.com/posts/1'
},
{
url: 'https://jsonplaceholder.typicode.com/comments?postId={param}',
param: 'id'
}];
let result = frest.casecaded(requests);
result.then(response => {
console.log(JSON.stringify(response, null, 4));
});
}To send HTTP REST requests one after another you can use waterfall() function.
function waterfall() {
let urls = ['https://jsonplaceholder.typicode.com/posts/1',
'https://jsonplaceholder.typicode.com/posts/2',
'https://jsonplaceholder.typicode.com/posts/3']
let result = frest.waterfall(urls);
result.then(response => {
console.log(JSON.stringify(response, null, 4));
});
}A pretty common use case is to fetch multiple resources from different REST APIs.
getAll() accepts array of REST API urls and returns a promise object whose response contains aggregated response of all REST APIs.
function getAll() {
let urls = ['https://jsonplaceholder.typicode.com/posts/1',
'https://jsonplaceholder.typicode.com/posts/2',
'https://jsonplaceholder.typicode.com/posts/3']
let result = frest.getAll(urls);
result.then(response => {
console.log(JSON.stringify(response, null, 4));
});
}It is similar to postAll() requests.
deleteAll() accepts array of REST API urls and returns a promise object whose response contains aggregated response of all REST APIs.
function deleteAll() {
let urls = ['https://jsonplaceholder.typicode.com/posts/1',
'https://jsonplaceholder.typicode.com/posts/2',
'https://jsonplaceholder.typicode.com/posts/3']
let result = frest.deleteAll(urls);
result.then(response => {
console.log(JSON.stringify(response, null, 4));
});
}Iternally frestjs uses fetch() API. This library will support all browsers which supports fetch().
https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API
MIT License © Balram Chavan
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