jquery ajax基本authentication节点expression

我想通过基本authentication的ajax，将返回401状态

客户

使用coffeescript

使用jquery.base64.js

$.ajax url : "http://example.com/" type: "GET" dataType: "text" crossDomain: true beforeSend: (xhr)-> credentials = $.base64.encode("user:pass") xhr.withCredentials = true xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest') xhr.setRequestHeader("Authorization", "Basic " + credentials) .always (result, textStatus, jqXHR) => if textStatus == "success" console.log "success" 

服务器

使用coffeescript

使用node.js express

 router.use (req, res, next)-> res.header "Access-Control-Allow-Origin", "http://client.com/" res.header "Access-Control-Allow-Methods", "GET, PUT, POST, DELETE, HEAD, OPTIONS" res.header "Access-Allow-Control-Credentials", "true" res.header "Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Authorization" next() router.use basicAuth('user', 'pass') router.get "/", (req, res)=> res.json 200, { status_code: 0 } 

以下是我试图实际发送的结果

请求

 Remote Address:example.com Request URL:http://example.com/ Request Method:OPTIONS Status Code:401 Unauthorized Request Headers Accept:*/* Accept-Encoding:gzip, deflate, sdch Access-Control-Request-Headers:accept, authorization Access-Control-Request-Method:GET Connection:keep-alive Host:example.com Origin:http://client.com Referer:http://client.com/ User-Agent:Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2219.0 Safari/537.36 

响应

 Response Headers Access-Allow-Control-Credentials:true Access-Control-Allow-Headers:Origin, X-Requested-With, Content-Type, Accept, Authorization Access-Control-Allow-Methods:GET, PUT, POST, DELETE, HEAD, OPTIONS Access-Control-Allow-Origin:http://client.com Connection:keep-alive Date:Mon, 17 Nov 2014 21:30:08 GMT Transfer-Encoding:chunked WWW-Authenticate:Basic realm="Authorization Required" X-Powered-By:Express 

在本地环境上运行为什么返回401状态