A body parser for koa, base on co-body. support json, form and text type body.

var koa = require('koa');
var bodyParser = require('koa-bodyparser');
var app = koa();
app.use(bodyParser());
app.use(function *() {
  // the parsed body will store in this.request.body
  // if nothing was parsed, body will be an empty object {}
  this.body = this.request.body;
});

• enableTypes: parser will only parse when request type hits enableTypes, default is ['json', 'form'].

• encode: requested encoding. Default is utf-8 by co-body.

• formLimit: limit of the urlencoded body. If the body ends up being larger than this limit, a 413 error code is returned. Default is 56kb.

• jsonLimit: limit of the json body. Default is 1mb.

• textLimit: limit of the text body. Default is 1mb.

• strict: when set to true, JSON parser will only accept arrays and objects. Default is true. See strict mode in co-body. In strict mode, this.request.body will always be an object(or array), this avoid lots of type judging. But text body will always return string type.

• detectJSON: custom json request detect function. Default is null.

  app.use(bodyparser({
    detectJSON: function (ctx) {
      return /\.json$/i.test(ctx.path);
    }
  }));

• extendTypes: support extend types:

  app.use(bodyparser({
    extendTypes: {
      json: ['application/x-javascript'] // will parse application/x-javascript type body as a JSON string
    }
  }));

• onerror: support custom error handle, if koa-bodyparser throw an error, you can customize the response like:

  app.use(bodyparser({
    onerror: function (err, ctx) {
      ctx.throw('body parse error', 422);
    }
  }));

• disableBodyParser: you can dynamic disable body parser by set this.disableBodyParser = true.

app.use(function* disableBodyParser(next) {
  if (this.path === '/disable') this.disableBodyParser = true;
  return yield next;
});
app.use(bodyparser());

You can access raw request body by this.request.rawBody after koa-bodyparser when:

1. koa-bodyparser parsed the request body.
2. this.request.rawBody is not present before koa-bodyparser.

MIT