spring-data-rest - 为什么 spring-data-rest 中的 alps(或配置文件)路径返回带有不匹配 header Content-Type : text/html? 的 json 正文

Question

现在，我的 spring-data-rest ( spring-boot 1.4.3.RELEASE ) 提供的 Controller 的默认 Content-Type 是 application/hal+json这是有道理的。如果我使用 chrome，我会得到 application/hal+json例如，对于我的应用程序的根目录，因为 chrome 使用了 "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8" 的 Accept header .然而，/profile (正式 /alps )即使响应正文是 json(使 Content-Type 与正文不匹配)，URL 也提供 text/html。如果您只要求 application/json，那么您将获得正确的响应 header 。

这是工作不正确的情况(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"
      }, {
...

将响应的其余部分剪掉，从上面可以看到它是json数据。

我相信上述请求的正确 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针对 /profile/* 的所有请求解决了这个问题。没有 content-type定义。

@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);
    }
}