A body parser for koa, based on co-body. support json
, form
and text
type body.
Notice: this module don't support parsing multipart format data, please use co-busboy to parse multipart format data.
const Koa = require('koa');
const bodyParser = require('koa-bodyparser');
const app = new Koa();
app.use(bodyParser());
app.use(async ctx => {
// the parsed body will store in ctx.request.body
// if nothing was parsed, body will be an empty object {}
ctx.body = ctx.request.body;
});
-
enableTypes: parser will only parse when request type hits enableTypes, support
json/form/text/xml
, default is['json', 'form']
. -
encoding: requested encoding. Default is
utf-8
byco-body
. -
formLimit: limit of the
urlencoded
body. If the body ends up being larger than this limit, a 413 error code is returned. Default is56kb
. -
jsonLimit: limit of the
json
body. Default is1mb
. -
textLimit: limit of the
text
body. Default is1mb
. -
xmlLimit: limit of the
xml
body. Default is1mb
. -
strict: when set to true, JSON parser will only accept arrays and objects. Default is
true
. See strict mode inco-body
. In strict mode,ctx.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(422, 'body parse error'); } }));
-
disableBodyParser: you can dynamic disable body parser by set
ctx.disableBodyParser = true
.app.use(async (ctx, next) => { if (ctx.path === '/disable') ctx.disableBodyParser = true; await next(); }); app.use(bodyParser());
You can access raw request body by ctx.request.rawBody
after koa-bodyparser
when:
koa-bodyparser
parsed the request body.ctx.request.rawBody
is not present beforekoa-bodyparser
.
To use koa-bodyparser
with koa@1, please use bodyparser 2.x.
npm install koa-bodyparser@2 --save