Method makeRequest

_.js:118–274

(options)

            // make the http request
            function makeRequest(options) {
                data = options.body;
                // Normalize the request url
                url = utils.trim(options.url);
                var baseUrl = utils.trim(options.baseURL || "");
                if (!url && isBrowser && !baseUrl) url = location.href;
                if (url.indexOf("http") !== 0) {
                    var isAbsolute = url[0] === "/";
                    if (!baseUrl && isBrowser) {
                        var arr = location.pathname.split("/");
                        arr.pop();
                        baseUrl = location.protocol + "//" + location.host + (isAbsolute ? "" : arr.join("/"))
                    }
                    if (baseUrl[baseUrl.length - 1] !== "/") {
                        baseUrl += "/"
                    }
                    url = baseUrl + (isAbsolute ? url.substr(1) : url)
                    if (isBrowser) {

                        // Normalize the url which contains the ".." or ".", such as
                        // "http://xx.com/aa/bb/../../xx" to "http://xx.com/xx" .
                        var t = document.createElement("a");
                        t.href = url;
                        url = t.href;
                    }
                }

                var responseType = utils.trim(options.responseType || "")
                engine.withCredentials = !!options.withCredentials;
                var isGet = options.method === "GET";
                if (isGet) {
                    if (data) {
                        if (utils.type(data) !== "string") {
                            data = utils.formatParams(data);
                        }
                        url += (url.indexOf("?") === -1 ? "?" : "&") + data;
                    }
                }
                engine.open(options.method, url);

                // try catch for ie >=9
                try {
                    engine.timeout = options.timeout || 0;
                    if (responseType !== "stream") {
                        engine.responseType = responseType
                    }
                } catch (e) {
                }

                var customContentType = options.headers[contentType] || options.headers[contentType.toLowerCase()];

                // default content type
                var _contentType = "application/x-www-form-urlencoded";
                // If the request data is json object, transforming it  to json string,
                // and set request content-type to "json". In browser,  the data will
                // be sent as RequestBody instead of FormData
                if (utils.trim((customContentType || "").toLowerCase()) === _contentType) {
                    data = utils.formatParams(data);