SuperAgent 
SuperAgent is a small progressive client-side HTTP request library, and Node.js module with the same API, sporting many high-level HTTP client features. View the docs.
Installation
node:
$ npm install superagent
component:
$ component install visionmedia/superagent
with script tags use ./superagent.js
Motivation
This library spawned from my frustration with jQuery's weak & inconsistent Ajax support. jQuery's API, while having recently added some promise-like support, is largely static, forcing you to build up big objects containing all the header fields and options, not to mention most of the options are awkwardly named "type" instead of "method", etc. Onto examples!
The following is what you might typically do for a simple GET with jQuery:
$.get('/user/1', function(data, textStatus, xhr){
});Great, it's ok, but it's kinda lame having 3 arguments just to access something on the xhr. Our equivalent would be:
request.get('/user/1', function(res){
});The response object is an instanceof request.Response, encapsulating all of this information instead of throwing a bunch of arguments at you. For example, we can check res.status, res.header for header fields, res.text, res.body etc.
An example of a JSON POST with jQuery typically might use $.post(), however once you need to start defining header fields you have to then re-write it using $.ajax()... so that might look like:
$.ajax({
url: '/api/pet',
type: 'POST',
data: { name: 'Manny', species: 'cat' },
headers: { 'X-API-Key': 'foobar' }
}).success(function(res){
}).error(function(){
});Not only is it ugly, but it's pretty opinionated. jQuery likes to special-case {4,5}xx- for example, you cannot (easily at least) receive a parsed JSON response for say "400 Bad Request". This same request would look like this:
request
.post('/api/pet')
.send({ name: 'Manny', species: 'cat' })
.set('X-API-Key', 'foobar')
.set('Accept', 'application/json')
.end(function(error, res){
});Plugins
Usage:
var nocache = require('no-cache');
var request = require('superagent');
var prefix = require('superagent-prefix')('/static');
prefix(request); // Prefixes *all* requests
request
.get('/some-url')
.use(nocache) // Prevents caching of *only* this request
.end(function(res){
// Do something
});Existing plugins:
- superagent-no-cache - prevents caching by including Cache-Control header
- superagent-prefix - prefixes absolute URLs (useful in test environment)
Please prefix your plugin component with superagent-*
For superagent extensions such as couchdb and oauth visit the wiki.
Running node tests
Install dependencies:
$ npm install
Run em!
$ make test
Running browser tests
Install dependencies:
$ npm install
Start the test runner:
$ make test-browser-local
Visit http://localhost:4000/__zuul in your browser.
Edit tests and refresh your browser. You do not have to restart the test runner.
Browser build
The browser build of superagent is located in ./superagent.js
Examples:
License
MIT