servile/lib/server.js

A quickstarter for NodeJS-based apps, automagically routing requests to files of same name within a given folder. Targeted at prototypers, not made for production.

const http = require('http')

const path = require('path')

const { answerDirectory } = require('./answer_directory.js')

const { findAnswer } = require('./find_answer.js')

const { fileExists, genHtml, parseData } = require('./helpers.js')



// Set default options for server.serve():

let paras = {

    filesPath: process.cwd(),

    port: 3000,

    answerDirectory: req => { return genHtml( answerDirectory(req, paras.filesPath) ) },

    answerNotFound: req => { return genHtml(`Nothing found for ${req.url}`) },

    ignoreIndexFiles: false,

    staticIndexTypes: ['html', 'json', 'md', 'txt']

}



function handleRequest(request, response) {

  // Forserver-side-events:

  let ssePath = paras.filesPath + request.url + '.sse'

  if( fileExists(ssePath) ) {

      // Set headers:

      response.writeHead(200, {
        'Content-Type': 'text/event-stream',
        'Cache-Control': 'no-cache',
        'Connection': 'keep-alive'
      })

      // Expect it to export a main-func and execute it upon req and res:

      require(ssePath).main(request, response)

      // Do *not* close request, nor response.

  }

  // For all other than server-side-events:

  else {

    // Collect posted data:

    let data = []; request.on('data', chunk => data.push(chunk))

    // After data was collected:

    request.on('end', async () => {

        // Attach posted data to request:

        if(data != '') request.data = parseData(data)

        // And search for an answer:

        findAnswer(request, response, paras)

    }) // req end

  } // not sse

}



// Create server:

const server = http.createServer(handleRequest)


// Define serve method:

server.serve = options => {


  // Make possibly passed filesPath absolute:

  if(options && options.filesPath) {

    options.filesPath = path.resolve(

      process.cwd(),

      options.filesPath

    )

  }


  // Override default options with passed options:

  for(const option in options) paras[option] = options[option]


  // Start server:

  server.listen(paras.port, () => {

    console.log(`Serving "${paras.filesPath}" on "http://localhost:${paras.port}"`)

  })

}


module.exports = server