java - 如何从我的 Dropwizard 资源中访问已包装在自定义类中的请求？

Question

我正在使用 Dropwizard，我想从过滤器中包装一个请求对象，并从我的资源类中获取对该实例的访问权限

例如执行以下操作

过滤器.java

public class ServiceRequestExtractionFilter implements Filter {
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        if (request instanceof HttpServletRequest && response instanceof HttpServletResponse) {
            HttpServletRequest httpRequest   = (HttpServletRequest) request;

            ProxyResourceRequest requestWrapper = new RequestWrapper(httpRequest, svcRequestData);

            chain.doFilter(requestWrapper, response);
        }
    }
...

资源.java

@Path("/test")
@Produces(MediaType.APPLICATION_JSON)
public class DemoResource {

    @GET
    @Timed
    public Response get(@Context UriInfo uriInfo, @Context RequestWrapper request) {

...

这不起作用，我也没有任何理由期望它起作用，但这似乎是解释我正在尝试做的事情的好方法。

Answer 1

试试这里记录的这个 ContainerFilter:http://dropwizard.io/manual/core.html#jersey-filters

public class DateNotSpecifiedFilter implements ContainerRequestFilter {

    @Context ExtendedUriInfo extendedUriInfo;

    @Override
    public ContainerRequest filter(ContainerRequest request) {
        boolean methodNeedsDateHeader = extendedUriInfo.getMatchedMethod().isAnnotationPresent(DateRequired.class);
        String dateHeader = request.getHeaderValue(HttpHeaders.DATE);

        if (methodNeedsDateHeader && dateHeader == null) {
            Exception cause = new IllegalArgumentException("Date Header was not specified");
            throw new WebApplicationException(cause, Response.Status.BAD_REQUEST);
        } else {
            return request;
        }
    }
}

只需在您的应用程序 run() 中添加:

environment.jersey().getResourceConfig().getContainerRequestFilters().add(new DateNotSpecifiedFilter());