taro-sockjs-client/src/utils/transport.js

sockjs-client for Taro

import debug from '../utils/debug'

export default function (availableTransports) {
  return {
    filterToEnabled: function (transportsWhitelist, info) {
      let transports = {
        main: [],
        facade: [],
      }
      if (!transportsWhitelist) {
        transportsWhitelist = []
      } else if (typeof transportsWhitelist === 'string') {
        transportsWhitelist = [transportsWhitelist]
      }

      availableTransports.forEach(function (trans) {
        if (!trans) {
          return
        }

        if (trans.transportName === 'websocket' && info.websocket === false) {
          debug('disabled from server', 'websocket')
          return
        }

        if (
          transportsWhitelist.length &&
          transportsWhitelist.indexOf(trans.transportName) === -1
        ) {
          debug('not in whitelist', trans.transportName)
          return
        }

        if (trans.enabled(info)) {
          debug('enabled', trans.transportName)
          transports.main.push(trans)
          if (trans.facadeTransport) {
            transports.facade.push(trans.facadeTransport)
          }
        } else {
          debug('disabled', trans.transportName)
        }
      })
      return transports
    },
  }
}