koa-middlewares

easy way to use some small but useful koa middlewares.

PRs are welcome, but only for those small and general middlewares.

install

npm install koa-middlewares --save

middlewares

• koa-bodyparser
• koa-compress
• koa-conditional-get
• koa-csrf
• koa-ejs
• koa-etag
• koa-favicon
• koa-generic-session
• koa-logger
• koa-onerror
• koa-redis
• koa-resource-router
• koa-rewrite
• koa-router
• koa-rt
• koa-safe-jsonp
• koa-session
• koa-static-cache

see exports

Usage

var koa = require('koa');
var middlewares = require('koa-middlewares');
var router = middlewares.router();

var app = koa();

router.get('/', function *(){
  this.body = 'hello koa-middlewares';
});

app.use(middlewares.bodyParser());
app.use(middlewares.conditional());
app.use(middlewares.etag());
app.use(middlewares.compress());
middlewares.csrf(app);
app.use(router.routes());
app.use(router.allowedMethods());

app.listen(7001);

Middlewares Quick Guide

• koa-bodyparser: post body parser, for application/json and application/x-www-form-urlencoded.

app.use(middlewares.bodyParser({
  limit: '10mb'
}));

app.use(function *(next) {
  var postBody = this.request.body;
});

• koa-csrf: CSRF tokens.

middlewares.csrf(app);
app.use(function *checkCsrf(next) {
  if (this.method === 'GET' ||
      this.method === 'HEAD' ||
      this.method === 'OPTIONS') {
    return yield *next;
  }

  this.assertCsrf();
  yield next;
});

• koa-ejs: ejs view render middleware. support all feature of ejs.

middlewares.render(app, {
  root: path.join(__dirname, 'view')
});

app.use(function *() {
  yield this.render('page.html', {foo: 'bar'});
});

• koa-etag: ETag support for Koa responses.
• koa-conditional-get: HTTP response freshness testing middleware base on node-fresh. use it upstream from etag.

app.use(middlewares.conditional());
app.use(middlewares.etag());

• koa-favicon: Bounce favicon requests with a 404.

app.use(middlewares.favicon());

• koa-safe-jsonp: A safe jsonp plugins for koa.

middlewares.jsonp(app);

app.use(function* () {
  this.jsonp = {foo: 'bar'};
});

• koa-logger: Development style logger.

app.use(middlewares.logger());

• koa-session: cookie base session.

app.use(middlewares.cookieSession());

• koa-generic-session: A session like connect with memory, has friendly APIs for work with other Stores such as redis, mongo.
• koa-redis: Work togather with koa-generic-session, provide a redis store from koa-sess.

app.use(middlewares.session({
  store: middlewares.RedisStore(),
  defer: true
}));

app.use(function *() {
  var session = yield this.session;
  session.foo = 'bar';
  this.body = this.session.foo;
});

• koa-router: Provide express-style routing using app.get, app.put, app.post.

var router = middlewares.router();

router.get('/', function *() {
  this.body = 'Hello koa-router';
});

app.use(router.routes());
app.use(router.allowedMethods());

• koa-resource-router: RESTful resource routing for koa.

var users = new middlewares.Resource('users');
app.use(users.middleware());

app.get('/users', function *() {
  this.body = [{name: 'Lee'}, {name: 'Han'}];
});

• koa-rewrite: URL rewrite middleware.

app.use(middlewares.rewrite('/js/*', '/public/assets/js/$1'));

• koa-rt: Log response time, support custom with microtime.

var microtime = require('microtime');
app.use(middlewares.rt({
  timer: microtime
}));

• koa-static-cache: Static file serving from memory.

app.use(middlewares.staticCache(path.join(__dirname, 'public'), {
  buffer: true,
  maxAge: 60 * 60 * 24 * 7,
  dir: path.join(rootdir, 'public')
}));

• koa-compress: Compress middleware for Koa, support gzip and deflate

var app = koa()
app.use(compress({
  threshold: 2048,
  flush: require('zlib').Z_SYNC_FLUSH
}))

• koa-onerror: Error handler

var app = koa()
onerror(app);

License

MIT