java – Servlet过滤器与CXF拦截器,用于修改请求和响应内容？

在这里回答我自己的问题…我最终使用了一个JAX-RS过滤器,一旦我缺少文档,它就能很好地运行.我使用了 http://cxf.apache.org/docs/jax-rs-filters.html的(相当稀疏的)文档.注意,尽管它的名字,JAX-RS过滤器是一个CXF特定的野兽,不是JAX-RS标准的一部分(据我所知).

以下是一些示例代码：

@Context
private HttpServletRequest httpRequest;
@Context
private UriInfo uriInfo;

/**
 * @see org.apache.cxf.jaxrs.ext.ResponseHandler#handleResponse(org.apache.cxf.message.Message,org.apache.cxf.jaxrs.model.OperationResourceInfo,javax.ws.rs.core.Response)
 */
public Response handleResponse(Message message,OperationResourceInfo opResourceInfo,Response response) {
    try {

        // log the injected context data; useful for debugging CXF problems
        logContextData(httpRequest,uriInfo);

        OutputStream os = message.getContent(OutputStream.class);
        String relevantData = getDataFromRequest(httpRequest);
        message.setContent(OutputStream.class,new MyOutputStreamWrapper(os,relevantData));

    } catch (CustomException e) {
            // return some status that is related to CustomException
        return Response.status(Status.UNAUTHORIZED).build();
    } catch (Exception e) {
        return Response.status(Status.INTERNAL_SERVER_ERROR).build();
    }

    return response;
}

/**
 * @see org.apache.cxf.jaxrs.ext.RequestHandler#handleRequest(org.apache.cxf.message.Message,org.apache.cxf.jaxrs.model.ClassResourceInfo)
 */
public Response handleRequest(Message message,ClassResourceInfo classResourceInfo) {
    try {

        // log the injected context data; useful for debugging CXF problems
        logContextData();

        String updatedQueryString = buildNewQueryString(this.uriInfo,httpRequest);

        message.put(Message.QUERY_STRING,updatedQueryString);


        // returning null tells CXF to continue the request (i.e. a non-null value would halt the request)
        return null;

    } catch (CustomException e) {
        // return some status that is related to CustomException
        return Response.status(Status.UNAUTHORIZED).build();
    } catch (Exception e) {
        return Response.status(Status.INTERNAL_SERVER_ERROR).build();
    }
}

我应该注意,MyOutputStreamWrapper的实现是修改响应内容的重要部分.由于安全考虑,我不能将这个源包含在这里(实际上我的实现具有不同的名称).