src/http/xhr.js

/**

 * @file Browser specific HTTP implementation

 * @since 0.2.1

 */

/*#ifndef(UMD)*/

"use strict";

/*global _GPF_HOST*/ // Host types

/*global _gpfHttpGenGetResponse*/ // Generates a function that extracts response from the http object

/*global _gpfHttpGenSend*/ // Generates a function that implements the http send logic

/*global _gpfHttpGenSetHeaders*/ // Generates a function that transmit headers to the http object

/*global _gpfHttpSetRequestImplIf*/ // Set the http request implementation if the host matches

/*#endif*/

/*jshint browser: true*/

/*eslint-env browser*/

var _GPF_HTTP_XHR_READYSTATE_DONE = 4,

    _gpfHttpXhrSetHeaders = _gpfHttpGenSetHeaders("setRequestHeader"),

    _gpfHttpXhrSend = _gpfHttpGenSend("send"),

    _gpfHttpXhrGetResponse = _gpfHttpGenGetResponse("status", "getAllResponseHeaders", "responseText");

function _gpfHttpXhrOpen (request) {

    var xhr = new XMLHttpRequest();

    xhr.open(request.method, request.url);

    return xhr;

}

function _gpfHttpXhrWaitForCompletion (xhr, resolve) {

    xhr.onreadystatechange = function () {

        if (xhr.readyState === _GPF_HTTP_XHR_READYSTATE_DONE) {

            resolve(_gpfHttpXhrGetResponse(xhr));

        }

    };

}

function _gpfHttpXhrRequest (request, resolve) {

    var xhr = _gpfHttpXhrOpen(request);

    _gpfHttpXhrSetHeaders(xhr, request.headers);

    _gpfHttpXhrWaitForCompletion(xhr, resolve);

    _gpfHttpXhrSend(xhr, request.data);

}

_gpfHttpSetRequestImplIf(_GPF_HOST.BROWSER, _gpfHttpXhrRequest);

_gpfHttpSetRequestImplIf(_GPF_HOST.PHANTOMJS, _gpfHttpXhrRequest);