Highwire

A high level HTTP client that is easy to build upon.

Reasoning

Superagent is a fantastic module, but I find that I generally need to build more on top of it. Such as cancelable requests and reties. Highwire provides this functionality through simple HTTP methods that work great for building complex network layers, or just to make syncing your React components easier.

API

Highwire exposes a factory function that will return a clean object with RESTful HTTP methods. Those methods are:

get(url, { headers, query, retries })
post(url, data, [,{ headers, query, retries })
put(url, data, { headers, query, retries })
patch(url, data, { headers, query, retries })
del(url, { headers, query, retries })
multipart(url, { fields, attachments }, { headers, query, retries, progress })

Highwire offers a number of ways to pull in the needed methods

import highwire from '@mls-digital/highwire'

const http = highwire()
http.get()

// or

const { get, post, put, patch, del, multipart } = highwire()

// or

import get from '@mls-digital/highwire/lib/get'
import post from '@mls-digital/highwire/lib/post'
import put from '@mls-digital/highwire/lib/put'
import patch from '@mls-digital/highwire/lib/patch'
import del from '@mls-digital/highwire/lib/delete'
import multipart from '@mls-digital/highwire/lib/multipart'

Examples

import React from 'react'
import highwireFactory from '@kkemple/highwire'

const { get } = highwireFactory()
const headers = { authorization: `token ${process.env.GITHUB_AUTH_TOKEN}` }
const retries = 5

export default React.createClass({
  componentWillMount() {
    // fetch some repos
    this.reposRequest = get('https://api.github.com/repos', { headers, retries })
    this.reposRequest
      .then((response) => JSON.parse(response.body))
      .then((repos) => this.setState({ repos }))
      .catch((err) => this.setState({ err }))
  },

  componentWillUnmount() {
    // cancel promise chain and http request to github
    // has no affect if promise has resolved already
    this.reposRequest.cancel()
  },

  render() {
    const { repos, err } = this.state

    if (err) return (
      <div className="error">{err.message}</div>
    )

    return (
      <div className="repos">
        <ul>
          {
            repos.length ?
              repos.map(repo => <li>{repo.name}</li>) :
              <li>No repos found...</li>
          }
        </ul>
      </div>
    )
  },
})

// ... more advanced redux/thunk example using higher order functions

import assign from 'lodash.assign'
import throttle from 'lodash.throttle'
import highwire from '@mls-digital/highwire'

const { get } = highwire()

const headers = { authorization: `token ${process.env.GITHUB_AUTH_TOKEN}` }
const retries = 5

function getRepos() {
  return get('https://api.github.com/repos', { headers, retries })
}

/* action types */
const REPOS_REQUEST = 'REPOS_REQUEST'
const REPOS_REQUEST_SUCCESS = 'REPOS_REQUEST_SUCCESS'
const REPOS_REQUEST_ERROR = 'REPOST_REQUEST_ERROR'
const REPOS_REQUEST_CANCELLED = 'REPOST_REQUEST_CANCELLED'

/* action creators */
let currentRequest

export const fetchRepos = throttle(function fetchRepos() {
  return (dispatch) => {
    dispatch({ type: REPOS_REQUEST })

    currentRequest = getRepos()
      .then((response) => JSON.parse(response.body))
      .then((repos) => dispatch({ type: REPOS_REQUEST_SUCCESS, payload: repos }))
      .catch((err) => dispatch({ type: REPOS_REQUEST_ERROR, error: err }))
  }
}, 1000 * 5)

export const cancelFetchRepos = () => (dispatch) => {
  if (currentRequest) {
    currentRequest.cancel()
    dispatch({ type: REPOS_REQUEST_CANCELLED })
  }
}

/* reducer */
const defaultState = {
  isComplete: false,
  hasError: false,
  isWorking: false,
  errorMessage: undefined,
  repos: [],
}

export default function reducer(state = defaultState, action) {
  switch (action.type) {
  case REPOS_REQUEST:
    return assign({}, state, {
      isWorking: true,
      isComplete: false,
      hasError: false,
    })

  case REPOS_REQUEST_SUCCESS:
    return assign({}, state, {
      isWorking: false,
      isComplete: true,
      repos: action.payload.repos,
    })

  case REPOS_REQUEST_ERROR:
    return assign({}, state, {
      isWorking: false,
      isComplete: false,
      hasError: true,
      errorMessage: action.error.message,
    })

  case REPOS_REQUEST_CANCELLED:
    return assign({}, state, {
      isWorking: false,
      isComplete: false,
      hasError: false,
    })

  default:
    return state
  }
}

// ...sending multipart form data

const attachments = [
  ['test', './fixtures/example.txt'],
]
const progress = (event) => console.log(event)

multipart('http://some.url/submit', { attachments }, { progress })
  .then((response) => JSON.parse(response.body))
  .then((data) => console.log(data))
  .catch((err) => console.log(err))