ajax请求网关访问服务并通过web security认证

正常情况下使用ajax访问网关访问微服务的时候，可以直接访问。但是如果服务中使用了Web Security认证之后我们需要在请求头添加Authorization来完成认证信息,代码如下

var authUser = "***" //后台服务认证user
var authPassword = "***"; //后台服务认证密码



var result = new Base64().encode(authUser + ":" + authPassword);
var authorization = "Basic " + result;
mui.ajax(serverLocal + url, {
        data: param,
        xhrFields: {
            withCredentials: true//跨域请求
        },
        headers: {
            Authorization: authorization 
        },
        dataType: dataType,
        type: 'post', //HTTP请求类型 
        success: function(data) {

        },
        error: function(xhr, type, errorThrown) {
            //异常处理；
            console.log(JSON.stringify(xhr));
            console.log(type);
            console.log(errorThrown);
        }
    });

下面bass64方法

function Base64() {

    // private property
    _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

    // public method for encoding
    this.encode = function(input) {
        var output = "";
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
        var i = 0;
        input = _utf8_encode(input);
        while(i < input.length) {
            chr1 = input.charCodeAt(i++);
            chr2 = input.charCodeAt(i++);
            chr3 = input.charCodeAt(i++);
            enc1 = chr1 >> 2;
            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
            enc4 = chr3 & 63;
            if(isNaN(chr2)) {
                enc3 = enc4 = 64;
            } else if(isNaN(chr3)) {
                enc4 = 64;
            }
            output = output +
                _keyStr.charAt(enc1) + _keyStr.charAt(enc2) +
                _keyStr.charAt(enc3) + _keyStr.charAt(enc4);
        }
        return output;
    }

    // public method for decoding
    this.decode = function(input) {
        var output = "";
        var chr1, chr2, chr3;
        var enc1, enc2, enc3, enc4;
        var i = 0;
        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
        while(i < input.length) {
            enc1 = _keyStr.indexOf(input.charAt(i++));
            enc2 = _keyStr.indexOf(input.charAt(i++));
            enc3 = _keyStr.indexOf(input.charAt(i++));
            enc4 = _keyStr.indexOf(input.charAt(i++));
            chr1 = (enc1 << 2) | (enc2 >> 4);
            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
            chr3 = ((enc3 & 3) << 6) | enc4;
            output = output + String.fromCharCode(chr1);
            if(enc3 != 64) {
                output = output + String.fromCharCode(chr2);
            }
            if(enc4 != 64) {
                output = output + String.fromCharCode(chr3);
            }
        }
        output = _utf8_decode(output);
        return output;
    }

    // private method for UTF-8 encoding
    _utf8_encode = function(string) {
        string = string.replace(/\r\n/g, "\n");
        var utftext = "";
        for(var n = 0; n < string.length; n++) {
            var c = string.charCodeAt(n);
            if(c < 128) {
                utftext += String.fromCharCode(c);
            } else if((c > 127) && (c < 2048)) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            } else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }

        }
        return utftext;
    }

    // private method for UTF-8 decoding
    _utf8_decode = function(utftext) {
        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;
        while(i < utftext.length) {
            c = utftext.charCodeAt(i);
            if(c < 128) {
                string += String.fromCharCode(c);
                i++;
            } else if((c > 191) && (c < 224)) {
                c2 = utftext.charCodeAt(i + 1);
                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                i += 2;
            } else {
                c2 = utftext.charCodeAt(i + 1);
                c3 = utftext.charCodeAt(i + 2);
                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                i += 3;
            }
        }
        return string;
    }
}