休息服务返回404 [英] Rest service returns 404

问题描述

如果对rest服务的调用执行了数据库查询，但未找到结果并返回，则返回代码的最佳实践是什么.

What is the best practice in return codes if a call to a rest service executes a database query, no results are found and it returns.

应该是404还是200，并显示一条没有记录的消息?

URL正确解析并且仅返回了没有记录就没有发生服务器错误.

The URL has resolved correctly and no server error has occurred just that there are no records returned.

网址示例为:

http://localhost/app/pr_xyz/1234

用于检索属于现有用户1234的xyz列表.用户ID 1234已被检索到，并且已知存在于数据库中.此URL(pr_xyz)仅用于检索属于该用户的xyz列表.

Used to retrieve a list of xyz that belong to the existing user 1234. The user id 1234 has already been retrieved and is known to exist in the database. This URL (pr_xyz) is just to retrieve a list of xyz that belong to that user.

关系是1个用户到0个或多个xyz.

The relationship is 1 user to 0 or many xyz.

在这种情况下，现有用户没有xyz.这应该是带有有意义消息的404还是200.

In this case the existing user has no xyz. Should this be a 404 or 200 with meaningful message.

我也无法控制URL.

推荐答案

同意@Satya，它应该是200，但是我们可以通过反向工作来得出答案.

Agree with @Satya, it should be a 200, but we can arrive at the answer by working backwards.

因此，我们从 HTTP状态代码的完整列表开始..从底部开始.

So, we start with the full list of HTTP status codes.. Start from the bottom.

• 这是服务器错误吗?不?那不是5xx
• 这是客户端错误吗?可能是?也许不是4xx
• 这显然不是重定向，所以它不是3xx.
• 呼叫成功吗?也许.
• 您是否要返回临时回复?不，它也不是1xx.

因此，通过消除过程，它们正在查看2xx代码.确切地说，哪种选择合适取决于您应用程序的语义.

So by process of elimination, which are looking at the 2xx codes. Exactly which would be a good fit depends on the semantics of your application.

因为这不是一个DELETE调用，所以我可能不会使用204 No Content，这可能是唯一的好选择.不是说没有内容.

Since, this is not a DELETE call, then I probably wouldn't use 204 No Content, which is probably the only good alternative. It's not that there's no content.

有内容:找到0个结果".没有搜索结果时，Google不会向您显示空白页.

There is content: "0 results found". Google doesn't show you a blank page when there are no search results.

因此，我们得出了200，同时还返回了一个有意义的身体.如果要返回原始结果，则可能需要考虑将它们包装在搜索结果对象中以提供一些元数据.

So we arrive at 200, as well as returning a meaningful body. If you were returning raw results, then you might want to consider wrapping them in a search-results object to provide some meta-data.

啊！因此，等等，如果您不是在显示搜索结果，而是在指示RESTful资源的集合呢?

Ah! So wait, what if instead of search results, you are indicating a collection of RESTful resources?

GET /items

在这种情况下，我仍将返回200，并显示没有物品的正文.

In this case, I would still return a 200 with a body that says there are no items.

如果您要检索特定资源怎么办?

What if, you were trying to retrieve a particular resource?

GET /items/1234

在这种情况下，是的，您想暗示项目1234不存在，并且应该返回404.

In this case, yes, you want to imply that item 1234 does not exist, and you should return a 404.

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