98548f0409
just realized this since we removed the top closure. i'm not sure if there's a better way to solve this, but i'd rather have this inconvenience than the extra closures. we should add tests!!! |
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| benchmarks | ||
| docs | ||
| examples | ||
| lib | ||
| test | ||
| .gitignore | ||
| .npmignore | ||
| .travis.yml | ||
| index.js | ||
| LICENSE | ||
| Makefile | ||
| package.json | ||
| Readme.md | ||
Expressive middleware for node.js using generators via co to make writing web applications and REST APIs more enjoyable to write.
Only methods that are common to nearly all HTTP servers are integrated directly into Koa's small ~400 SLOC codebase. This includes things like content-negotiation, normalization of node inconsistencies, redirection, and a few others.
No middleware are bundled with koa. If you prefer to only define a single dependency for common middleware, much like Connect, you may use koa-common.
Installation
$ npm install koa
To use Koa you must be running node 0.11.4 or higher for generator support, and must run node(1)
with the --harmony-generators flag. If you don't like typing this, add an alias to your shell profile:
alias node='node --harmony-generators'
Community
- API documentation
- Middleware list
- Wiki
- G+ Community
- Mailing list
- Guide
- FAQ
- #koajs on freenode
Example
var koa = require('koa');
var app = koa();
// logger
app.use(function *(next){
var start = new Date;
yield next;
var ms = new Date - start;
console.log('%s %s - %s', this.method, this.url, ms);
});
// response
app.use(function *(){
this.body = 'Hello World';
});
app.listen(3000);
Running tests
$ make test
Benchmarks
If you like silly benchmarks, here's the requests per second using wrk 3.x on my MBP.
1 middleware
8367.03
5 middleware
8074.10
10 middleware
7526.55
15 middleware
7399.92
20 middleware
7055.33
30 middleware
6460.17
50 middleware
5671.98
100 middleware
4349.37
With 50 middleware (likely much more than you'll need), that's 340,260 requests per minute, and 20,415,600 per hour, and over 440 million per day, so unless you're a facebook and can't manage to spin up more than one process to scale horizontally you'll be fine ;)
Authors
License
MIT