使用jwt方式去验证，在拦截器中添加Authorization，始终无法添加，请问下问题在哪？
拦截器代码如下

request : function(config){
                    config.withCredentials = true;
                    //演示token
                    var token = 'eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJodHRwczovL3NhbXBsZXMuYXV0aDAuY29tLyIsInN1YiI6ImZhY2Vib29rfDEwMTU0Mjg3MDI3NTEwMzAyIiwiYXVkIjoiQlVJSlNXOXg2MHNJSEJ3OEtkOUVtQ2JqOGVESUZ4REMiLCJleHAiOjE0MTIyMzQ3MzAsImlhdCI6MTQxMjE5ODczMH0.7M5sAV50fF1-_h9qVbdSgqAnXVF7mz3I6RjS6JiH0H8';
                    config.headers.Authorization = 'bearer ' + token;
                    return config;
},

请求头

OPTIONS /index.php?s=/Content/homepage&page=1 HTTP/1.1
Host: api.yyxx.net
Connection: keep-alive
Access-Control-Request-Method: GET
Origin: http://h5.yyxx.net
User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1
Access-Control-Request-Headers: authorization
Accept: */*
Referer: http://h5.yyxx.net/
Accept-Encoding: gzip, deflate, sdch
Accept-Language: zh-CN,zh;q=0.8,en;q=0.6,zh-TW;q=0.4

始终带不上token，请大家指教下问题在哪里。