“无可用数据”的HTTP状态代码来自外部数据源 [英] HTTP status code for "no data available" from an external datasource

问题描述

情景：

发送 POST 请求以处理订单将导致从外部数据源检索数据。

A POST request is sent to process an order that will result in data retrieval from an external datasource.

有三种可能的结果：

1. 请求的数据源返回数据


2. 没有可用于请求的数据（这被视为错误）


3. 数据源无法无法访问（可能需要维护）

1 的明显响应是 200：确定或 201：已创建（根据此请求创建实体）。

An obvious response for 1 is 200: OK or 201: Created (an entity is created from this request).

哪些状态代码适用于 2 和 3 ？

What status codes would be appropriate for 2 and 3?

我考虑的状态代码：

• 503：服务不可用数据源停止时


• 500：内部服务器错误数据源关闭时


• 502：错误网关何时无数据可用


• 404：未找到当无数据可用时


• 403：禁止何时无数据可用


• 412：先决条件失败何时无数据可用

• 503: Service Unavailable when datasource is down
• 500: Internal Server Error when datasource is down
• 502: Bad Gateway when "no data available"
• 404: Not Found when "no data available"
• 403: Forbidden when "no data available"
• 412: Precondition Failed when "no data available"

推荐答案

2）回过头来看，我同意它应该是204 No Content或者200根据返回的结构，可以找到指示没有记录或资源的正文。
404通常在资源URI不存在时使用，或者在restful服务的情况下找不到URI中的资源。

2) Looking back at this, I agree it should probably be either a 204 No Content or maybe a 200 with a body indicating no records or resources could be found depending on the structure returned. 404's are generally used when the resource URI doesn't exist or a resource in the URI is not found in the case of a restful service.

3） 503服务不可用

3) 503 Service Unavailable

由于服务器临时过载或维护，服务器当前无法处理请求。这意味着这是一个暂时的条件，经过一段时间的延迟后会得到缓解。如果已知，延迟的长度可以在Retry-After报头中指示。如果没有给出Retry-After，客户端应该像处理500响应一样处理响应。

The server is currently unable to handle the request due to a temporary overloading or maintenance of the server. The implication is that this is a temporary condition which will be alleviated after some delay. If known, the length of the delay MAY be indicated in a Retry-After header. If no Retry-After is given, the client SHOULD handle the response as it would for a 500 response.

  Note: The existence of the 503 status code does not imply that a
  server must use it when becoming overloaded. Some servers may wish
  to simply refuse the connection.

这篇关于“无可用数据”的HTTP状态代码来自外部数据源的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！