如何使用 ServiceStack 在成功删除时返回 HTTP 204 响应 [英] How to return HTTP 204 response on successful DELETE with ServiceStack

问题描述

我在使用 ServiceStack 返回没有正文的 HTTP 204 时遇到问题

I'm having problems returning a HTTP 204 with no body using ServiceStack

如果我回来:

return new HttpResult() {
    StatusCode = HttpStatusCode.NoContent 
};

第一次运行完美，但重复调用会导致 Fiddler 抛出一个错误，指出最后一个响应的格式不正确.我相信这是因为内容类型没有明确设置为 application/json，并且响应返回一个空字符串或单个空格字符.

The first time it works perfectly, but a repeated call will cause Fiddler to throw an error stating last response wasn't formed properly. I believe it is because the content type is not explicitly set to application/json, and the response comes back with an empty string or single space character.

由于某种原因在 HttpResult 对象上设置 ContentType = "json" 会返回 HTTP 405 响应.(这是一个附带的好奇心 - 不是我的主要关注点)

Setting ContentType = "json" on the HttpResult object for some reason returns a HTTP 405 response. (which is a side curiosity - not my primary concern)

如果我返回 void，则响应是 HTTP 200，我目前正在使用它，但我想我可以提供首选的 204 响应.

If I return void, then the response is an HTTP 200, which I am using currently, but I'd like to think I could provide the preferred 204 response.

感谢您的时间.

推荐答案

如果没有响应，我使用一个简单的响应过滤器在响应上设置一个 No Content 标头.

I use a simple response filter to set a No Content header on the response if there is no response.

在AppHostConfigure方法中设置过滤器:

GlobalResponseFilters.Add((req, res, obj) => {
    // Handle void responses
    if(obj == null && res.StatusCode == 200)
    {
        res.StatusCode = (int)HttpStatusCode.NoContent;
        res.StatusDescription = "No Content";
    }
});

然后当方法返回 void 时，将设置正确的标头.

Then when a method returns void the correct header will be set.

public void Delete(TestRequest request)
{
    // I don't return anything
}

关于 JSON 的 405 错误响应.仅当您发送空响应和状态 200 时才会发生这种情况，因为这是格式错误的 JSON.但是发送上面的 204 No Content 可以防止这个错误.有关详细信息，请参阅此答案.

Regarding your 405 error response for JSON. This will only occur if you send an empty response and a status 200, as this is malformed JSON. But sending the above 204 No Content will prevent this error. See this answer for more info.

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