@velocejs/bodyparser

This module is for use with uWebSocket.js, not for standard node.js http library.

(0.10.0) breaking change - it's now named export along with the default exports; the default will get remove in the future release. Please follow the example below

import { bodyParser } from '@velocejs/bodyparser'
import uws from 'uWebsocket.js'

uws.App()
  .any('/*', async (res, req) => {
    const result = await bodyParser(res, req)
    // take a look
    console.log(result)
    res.end('OK')
  })

This body parser is all in one solution that can deal with GET, POST as well as file upload. As long as you use the appropriate header and it will able to produce the result you want.

Example using our @velocejs/server

import { bodyParser } from '@velocejs/bodyparser'

const app = createApp()
  .get('/*', async (res: HttpResponse, req: HttpRequest) => {
    const result: UwsRespondBody = await bodyParser(
      res,
      req,
      /* optional onAbortedHandler */ () => console.log(`something wrong`)
    )
    // do your thing with the result  
  })
  .listen(port, token => {
    console.log("running")
  })

The result is a UwsRespondBody type object with this signature:

export type UwsRespondBody = {
  url: string
  method: string
  query: string
  headers: UwsStringPairObj
  params: UwsStringAnyObj
  queryParams: UwsStringPairObj
  names?: Array<string>
  type?: string // our internal ID
  payload?: Buffer
}

Here are the detail:

• url - the full url got called
• method - how it was called (i.e. GET, POST etc)
• query - the full query string (i.e. ?a=1&b=2)
• headers - all the headers from this request
• params - if the call is a GET, then you will get result parsed from the query (i.e. {a: 1, b: 2}) if its a POST then you get all the field in one object; if you POST a json then the result json will be in this params
• payload - this is the raw buffer received
• queryParams - this is the params we get from your url (i.e. url?a=1&b=2) by default all the props start with underscore (i.e. _cb=092348309) will get strip out

Body Parser further explain

It doesn't just process your POST form or GET url parameters. It also handles files upload at the same time.

For example, you have a form with multipart/form-data header (default for HTML file form) with the the follow name / value pair

  name: John Doe
  email: [e-mail]
  file[]: avatar.jpg
  file[]: avatar-alternative.png

This example form setup has two text fields, and multiple files upload field. Once it got to the server and processed by bodyParser:

// server setup etc
app.post('/setup-user', async (res: HttpResponse, req: HttpRequest): void => {
    const result = await bodyParser(res, req, () => console.error(`Server aborted!`))
    // now inside your params you will get the following data
    // THIS IS FAKE CODE!!!! DON'T COPY AND PASTED!!!! //
    result.params = {
      name: 'John Doe',
      email: '[e-mail]',
      file: [
        {
          type: 'image/jpeg',
          filename: 'avatar.jpg',
          data: <Buffer>
        },
        {
          type: 'image/png',
          filename: 'avatar-alternative.png',
          data: <Buffer>
        },
      ]

    }
    res.end('OK')
  })

Now you can take that input and do what you want with it. Please note, we don't store that uploaded file anywhere so you have to deal with it yourself.

Dynamic Route support

BREAKING CHANGE in V.0.5.0

You can now pass url like this:

/first_part_must_be_a_fixed_string/:id(:/optional)

And the bodyParser will able to work out the items value from the url and put into the params result field.

Extra export from this module

The follow two exports can use in any node.js project

parseMultipart and getBoundary

First you use the getBoundary(headers: string[]) to extract the boundary then use the parseMultipart(body: Buffer, boundary: string) to parse the input. And you will get the result in an array, file will also be in it.

---

Joel Chu (c) 2022