为什么spring-data-rest中的alps (或配置文件)路径返回json body和不匹配的头文件Content-Type: text/html？

Question

现在，我的spring-data-rest (spring-boot 1.4.3.RELEASE)提供的控制器的默认Content-Type是application/hal+json，这很有意义。例如，如果我使用chrome，我会得到应用程序根目录的application/hal+json，因为chrome使用的是Accept头文件"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8"。然而，/profile (正式的/alps) URL提供了文本/html，即使响应主体是json (使得内容类型与主体不匹配)。如果您专门只请求application/json，那么您将获得正确的响应头。

以下是错误的工作情况(当返回的文档/正文不是text/html时，返回text/html)：

$ http --verbose "http://localhost:8080/v1/profile/eldEvents" "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8"

GET /v1/profile/eldEvents HTTP/1.1
Accept:  text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Encoding: gzip, deflate
Connection: keep-alive
Host: localhost:8080
User-Agent: HTTPie/0.9.2



HTTP/1.1 200 
Access-Control-Allow-Credentials: true
Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept, Location, X-Auth, Authorization
Access-Control-Allow-Methods: GET, HEAD, POST, PUT, DELETE, TRACE, OPTIONS, PATCH
Access-Control-Allow-Origin: *
Access-Control-Expose-Headers: Location
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Content-Type: text/html;charset=UTF-8
Date: Fri, 03 Feb 2017 01:16:14 GMT
Expires: 0
Pragma: no-cache
Strict-Transport-Security: max-age=31536000 ; includeSubDomains
Transfer-Encoding: chunked
X-Application-Context: application
X-Content-Type-Options: nosniff
X-Frame-Options: DENY
X-XSS-Protection: 1; mode=block

{
  "alps" : {
    "version" : "1.0",
    "descriptors" : [ {
      "id" : "eldEvent-representation",
      "href" : "http://localhost:8080/v1/profile/eldEvents",
      "descriptors" : [ {
        "name" : "sequenceId",
        "type" : "SEMANTIC"
      }, {
...

去掉响应的其余部分，你可以从上面看到它是json数据。

我认为上述请求的正确Content-Type应该类似于"application/json“。

Answer 1

如果这仍然与您相关:我已经通过手动覆盖所有没有定义content-type的/profile/*请求解决了这个问题。

@Component
public class ProfileContentTypeFilter extends OncePerRequestFilter
{
    private static final AntPathMatcher matcher = new AntPathMatcher();

    @Override
    protected void doFilterInternal (HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
    throws ServletException, IOException
    {
        if (request.getContentType() == null && matcher.match("/profile/*", request.getRequestURI()))
        {
            // Override response content type for unspecified requests on profile endpoints
            response.setContentType(MediaType.APPLICATION_JSON_VALUE);
        }

        filterChain.doFilter(request, response);
    }
}