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Expressive middleware for node.js using generators via [co](https://github.com/visionmedia/co)
to make writing web applications and REST APIs more enjoyable to write.
Koa provides a useful set of methods that make day to day web application and API design much
faster, and less error-prone than "raw" nodejs. Many of these utilities were extracted from [Express](https://github.com/visionmedia/express),
however moving them to this layer allows middleware developers to avoid boilerplate and refrain from re-implementing
many of these features, sometimes incorrectly or incomplete.
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.
Only methods that are common to nearly all HTTP servers are integrated directly into Koa's small ~400 SLOC codebase. No middleware
are bundled with koa. If you prefer to only define a single dependency for common middleware, much like Connect, you may use
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](https://github.com/koajs/common).
## Installation