rqt

Easy-To-Use Request Library That Supports String, JSON And Buffer Requests, Timeouts, GZip Compression And Session Maintenance.

Usage no npm install needed!

<script type="module">
  import rqt from 'https://cdn.skypack.dev/rqt';
</script>

README

rqt

npm version

rqt is a Node.js request library. It allows to send requests with or without data, parse a JSON response automatically and enables gzip compression by default.

Table Of Contents

API

The package can be used from Node.js as multiple functions for different kinds of requests to make. The main purpose of splitting the package into multiple functions is to be able to get the correct type inference, e.g., a string for rqt, buffer for bqt and an object for jqt, and make it visually perceivable what kind of data is expected from the server. A Session instance can be used to persist cookies across requests.

import rqt, { jqt, bqt, aqt, Session } from 'rqt'
Function Meaning Return type
rqt String Request Request a web page and return the result as a string.
jqt JSON Request Parse the result as a JSON object.
bqt Binary Request The result will be returned as a buffer.
aqt Advanced Request In addition to the body, the result will contain headers and status, an alias for @rqt/aqt.
Session Session With Cookies Proxies all other methods from this package, but remembers cookies.

Each request function accept options to set headers and send data as the second argument after the URL.

AqtOptions: Configuration for requests.

Name Type & Description Default
data !Object -
Optional data to send to the server with the request.
type string json
How to send data: json to serialise JSON data and add Content-Type: application/json header, and form for url-encoded transmission with Content-Type: application/x-www-form-urlencoded. Multipart/form-data must be implemented manually.
headers !http.OutgoingHttpHeaders -
Headers to use for the request. By default, a single User-Agent header with Mozilla/5.0 (Node.JS) aqt/{version} value is set.
compress boolean true
Add the Accept-Encoding: gzip, deflate header to indicate to the server that it can send a compressed response.
timeout number -
The timeout after which the request should fail.
method string -
What HTTP method to use in making of the request. When no method is given and data is present, defaults to POST.
binary boolean false
Whether to return a buffer instead of a string.
justHeaders boolean false
Whether to stop the request after response headers were received, without waiting for the data.

async rqt(
  url: string,
  options?: Options,
): string

Request a web page, and return the result as a string.

import rqt from 'rqt'

const Request = async (url) => {
  const res = await rqt(url)
  console.log(res)
}
Hello World
Show Server
import idioCore from '@idio/idio'

const Server = async () => {
  const { url } = await idioCore({
    async hello(ctx) {
      ctx.body = 'Hello World'
    },
  }, { port: 0 })
  return url
}

export default Server

To send data to the server, add some options.

import rqt from 'rqt'

const Request = async (url) => {
  const res = await rqt(url, {
    headers: {
      'User-Agent': '@rqt/rqt (Node.js)',
    },
    data: {
      username: 'new-user',
      password: 'pass123',
    },
    type: 'form',
    method: 'PUT',
  })
  console.log(res)
}
You have requested with PUT:
Body: {
  "username": "new-user",
  "password": "pass123"
}
Headers: {
  "user-agent": "@rqt/rqt (Node.js)",
  "content-type": "application/x-www-form-urlencoded",
  "content-length": "34",
  "accept-encoding": "gzip, deflate",
  "host": "localhost:5001",
  "connection": "close"
}
Show Server
import idioCore from '@idio/idio'
import { collect } from 'catchment'
import { parse } from 'querystring'

const Server = async () => {
  const { url } = await idioCore({
    async bodyparser(ctx, next) {
      const data = await collect(ctx.req)
      if (data) ctx.request.body = parse(data)
      await next()
    },
    test(ctx) {
      ctx.body = `You have requested with ${ctx.method}:
Body: ${JSON.stringify(ctx.request.body, null, 2)}
Headers: ${JSON.stringify(ctx.request.headers, null, 2)}
`
    },
  }, { port: 5001 })
  return url
}

export default Server

async jqt(
  url: string,
  options?: Options,
): Object

Request a web page, and return the result as an object.

import { jqt } from 'rqt'

const Request = async (url) => {
  const res = await jqt(url)
  console.log(JSON.stringify(res, null, 2))
}
{
  "Hello": "World"
}

async bqt(
  url: string,
  options?: Options,
): !Buffer

Request a web page, and return the result as a buffer.

import { bqt } from 'rqt'

const Request = async (url) => {
  const res = await bqt(url)
  console.log(res)
}
<Buffer 48 65 6c 6c 6f 20 57 6f 72 6c 64>

async aqt(
  url: string,
  options?: AqtOptions,
): AqtReturn

Request a web page and return additional information about the request. This method is also available as a standalone package: @rqt/aqt.

AqtReturn: The return type of the function.

Name Type Description
body* !(string | Object | Buffer) The return from the server. In case the json content-type was set by the server, the response will be parsed into an object. If binary option was used for the request, a Buffer will be returned. Otherwise, a string response is returned.
headers* !http.IncomingHttpHeaders Incoming headers returned by the server.
statusCode* number The status code returned by the server.
statusMessage* string The status message set by the server.

Session Class

The Session class allows to remember cookies set during all requests. It will maintain an internal state and update cookies when necessary.

constructor(
  options?: SessionOptions,
): Session

Create an instance of the Session class. All headers specified in the constructor will be present for each request (unless overridden by individual request options).

SessionOptions: Options for a session.

Name Type Description
host string The prefix to each request, such as https://rqt.biz.
headers !http.OutgoingHttpHeaders Headers to use for each request.

The methods in the Session class are proxied to the respective methods in the API, but the cookies and session's headers will be set automatically.

import { Session } from 'rqt'

const SessionRequest = async (url) => {
  // 0. Create a Session.
  const session = new Session({
    host: url,
    headers: {
      'User-Agent': 'Mozilla/5.0 Node.js rqt',
    },
  })

  // 1. Request A JSON Page with Jqt.
  const { SessionKey } = await session.jqt('/StartSession')
  console.log('Session key: %s', SessionKey)

  // 2. Send Form Data And Get Headers With Aqt.
  const {
    statusCode,
    body,
    headers: { location },
  } = await session.aqt('/Login', {
    data: {
      LoginUserName: 'test',
      LoginPassword: 'test',
      sessionEncryptValue: SessionKey,
    },
    type: 'form',
  })
  console.log('%s Redirect: "%s"', statusCode, body)

  // 3. Request A Page As A String With Rqt.
  const res = await session.rqt(location)
  console.log('Page: "%s"', res)
}
Session key: Example-4736gst4yd
302 Redirect: "Redirecting to <a href="/Portal">/Portal</a>."
Page: "Hello, test"
Show Server
import idioCore from '@idio/idio'
import { collect } from 'catchment'
import { parse } from 'querystring'

const Server = async () => {
  const { url, app } = await idioCore({
    async error(ctx, next) {
      try {
        await next()
      } catch ({ message }) {
        ctx.status = 400
        ctx.body = message
      }
    },
    session: { use: true, keys: ['example'] },
    async bodyparser(ctx, next) {
      const data = await collect(ctx.req)
      if (data) ctx.request.body = parse(data)
      await next()
    },
  }, { port: 5002 })
  app.use((ctx) => {
    switch (ctx.path) {
    case '/StartSession':
      ctx.session.SessionKey = 'Example-4736gst4yd'
      ctx.body = {
        SessionKey: ctx.session.SessionKey,
      }
      break
    case '/Login': {
      const { sessionEncryptValue } = ctx.request.body
      if (!sessionEncryptValue) {
        throw new Error('Missing session key.')
      }
      if (sessionEncryptValue != ctx.session.SessionKey) {
        throw new Error('Incorrect session key.')
      }
      ctx.session.user = ctx.request.body.LoginUserName
      ctx.redirect('/Portal')
      break
    }
    case '/Portal':
      if (!ctx.session.user) {
        throw new Error('Not authorized.')
      }
      ctx.body = `Hello, ${ctx.session.user}`
      break
    }
  })
  return url
}

export default Server

async rqt(
  location: string,
  options?: AqtOptions,
): string

Request a page as a string. All options are the same as accepted by the rqt functions.

async jqt(
  location: string,
  options?: AqtOptions,
): Object

Request a page as an object.

async bqt(
  location: string,
  options?: AqtOptions,
): !Buffer

Request a page as a buffer.

async aqt(
  location: string,
  options?: AqtOptions,
): !AqtReturn

Request a page and return parsed body, headers and status.

Copyright

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