我正在尝试通过使用如下方式正确处理 node.js/ restify中 RESTful API 中的 Accept 标头。WrongAcceptError
var restify = require('restify')
; server = restify.createServer()
// Write some content as JSON together with appropriate HTTP headers.
function respond(status,response,contentType,content)
{ var json = JSON.stringify(content)
; response.writeHead(status,
{ 'Content-Type': contentType
, 'Content-Encoding': 'UTF-8'
, 'Content-Length': Buffer.byteLength(json,'utf-8')
})
; response.write(json)
; response.end()
}
server.get('/api',function(request,response,next)
{ var contentType = "application/vnd.me.org.api+json"
; var properContentType = request.accepts(contentType)
; if (properContentType!=contentType)
{ return next(new restify.WrongAcceptError("Only provides "+contentType)) }
respond(200,response,contentType,
{ "uri": "http://me.org/api"
, "users": "/users"
, "teams": "/teams"
})
; return next()
});
server.listen(8080, function(){});
如果客户端提供正确的Accept
标头或没有标头,则可以正常工作,如下所示:
$ curl -is http://localhost:8080/api
HTTP/1.1 200 OK
Content-Type: application/vnd.me.org.api+json
Content-Encoding: UTF-8
Content-Length: 61
Date: Tue, 02 Apr 2013 10:19:45 GMT
Connection: keep-alive
{"uri":"http://me.org/api","users":"/users","teams":"/teams"}
问题是,如果客户端确实提供了错误的Accept
标头,服务器将不会发送错误消息:
$ curl -is http://localhost:8080/api -H 'Accept: application/vnd.me.org.users+json'
HTTP/1.1 500 Internal Server Error
Date: Tue, 02 Apr 2013 10:27:23 GMT
Connection: keep-alive
Transfer-Encoding: chunked
因为假定客户端不理解错误消息,它是 JSON 格式的,如下所示:
$ curl -is http://localhost:8080/api -H 'Accept: application/json'
HTTP/1.1 406 Not Acceptable
Content-Type: application/json
Content-Length: 80
Date: Tue, 02 Apr 2013 10:30:28 GMT
Connection: keep-alive
{"code":"WrongAccept","message":"Only provides application/vnd.me.org.api+json"}
因此,我的问题是,我如何强制restify发回正确的错误状态代码和正文,或者我做错了什么?