Ext.define('saas.util.BaseUtil', {

    /**
     * 发起Ajax请求
     * @param url: 请求路径
     * @param params: 请求参数
     */
    request: function (config) {
        var url = config.url,
            params = config.params,
            async = config.async || true,
            method = config.method || 'GET',
            timeout = config.timeout || 8000,
            defaultHeaders = {
                'Access-Control-Allow-Origin': '*',
                "Content-Type": 'application/json;charset=UTF-8' 
            };

        return new Ext.Promise(function (resolve, reject) {
            Ext.Ajax.request({
                url: url,
                params: params,
                async: async,
                method: method,
                timeout: timeout,
                headers: Ext.apply(defaultHeaders, config.headers),
                success: function (response, opts) {
                    var res = Ext.decode(response.responseText);
                    if(res.success) {
                        return resolve(response);
                    }else {
                        console.error('server request failure with code ' + res.code + '.');
                        console.error('failure message: ' + res.message);
                        return reject(response);
                    }
                },
                failure: function (response, opts) {
                    console.error('server-side failure with status code ' + response.status);
                    return reject(response);
                }
            });
        })
    }
});