我的RESTAPI返回JSON.
I'm currently returning text/plain as the MIME type, but it feels funny.
Should I be returning application/x-javascript or some other type?
The second question is with regard to the HTTP status code for error conditions. If my REST API is returning an error state, I am returning as JSON
{ result: "fail", errorcode: 1024, errormesg: "That sucked. Try again!" }
HTTP状态代码是否应该保持为200 OK？
The JSON spec suggests application/json, and that seems to be supported by the IETF and IANA registry.
On the second question, I think if the message handling fails in some way you should return a structured and standard error response as a JSON message; only if there is a failure to deliver the message to the backend handler for some reason should you consider an HTTP error code.
Update 2014-06-27:客户端(浏览器)只处理200个响应的日子已经过go 了，RESTful API的主流建议是使用适合于响应的HTTP响应代码，2xx用于成功响应(例如，201为PUT创建；204为DELETE创建无内容)，4xx和5xx用于所有错误条件，包括来自API本身的错误条件.