xe-ajax/src/handle/request.js

异步请求函数，用于浏览器和 node.js 的 HTTP 客户端

'use strict'

var utils = require('../core/utils')
var XEHeaders = require('./headers')

function XERequest (options) {
  utils.assign(this, { url: '', body: '', params: '', signal: '' }, options)
  this.headers = new XEHeaders(options.headers)
  this.method = this.method.toLocaleUpperCase()
  this.bodyType = this.bodyType.toLowerCase()
  var reqSignal = this.signal
  if (reqSignal && reqSignal.install) {
    reqSignal.install(this)
  }
}

var requestPro = XERequest.prototype
var reFullURL = /(\w+:)\/{2}.+/

requestPro.abort = function () {
  if (this.xhr) {
    this.xhr.abort()
    if (this._noA) {
      this.xhr.onabort()
    }
  }
  this.$abort = true
}
requestPro.getUrl = function () {
  var matchs
  var url = this.url
  var params = this.params
  var origin = utils.getOrigin(this)
  var transformParams = this.transformParams
  var _param = utils.includes(['no-store', 'no-cache', 'reload'], this.cache) ? { _t: new Date().getTime() } : {}
  if (url) {
    if (transformParams) {
      params = this.params = transformParams(params || {}, this)
    }
    if (params && !utils.isFData(params) && !utils.isURLSParams(params)) {
      params = utils.isStr(params) ? params : (this.paramsSerializer || utils.serialize)(utils.assign(_param, params), this)
    } else {
      params = utils.serialize(_param)
    }
    if (params) {
      url += (url.indexOf('?') === -1 ? '?' : '&') + params
    }
    if (reFullURL.test(url)) {
      return url
    }
    if (url.indexOf('//') === 0) {
      matchs = origin.match(reFullURL)
      return (matchs ? matchs[1] : (utils.IS_N ? '' : location.protocol)) + url
    }
    if (url.indexOf('/') === 0) {
      return origin + url
    }
    return utils.getBaseURL(this).replace(/\/$/, '') + '/' + url
  }
  return url
}
requestPro.getBody = function () {
  var result = null
  var body = this.body
  var reqMethod = this.method
  var transformBody = this.transformBody
  var stringifyBody = this.stringifyBody
  if (body) {
    if (reqMethod === 'GET' || reqMethod === 'HEAD') {
      throw utils.createErr('Request with GET/HEAD method cannot have body')
    } else {
      if (transformBody) {
        body = this.body = transformBody(body, this) || body
      }
      if (stringifyBody) {
        result = stringifyBody(body, this)
      } else {
        if (utils.isURLSParams(body)) {
          result = body.toString()
        } else if (utils.isFData(body) || utils.isStr(body)) {
          result = body
        } else {
          result = this.bodyType === 'form-data' ? utils.serialize(body) : JSON.stringify(body)
        }
      }
    }
  }
  return result
}

module.exports = XERequest