泽西：错误跟踪：java。lang.IllegalStateException:实体输入流已关闭

Question

我和泽西2号一起工作。十,

下面是我的控制器

@GET
@Path("{id}")
@Produces("application/json")
public Response getUser(@PathParam("id") int userId, @Context ContainerRequestContext containerRequestContext) {


        ContainerRequestContext requestContext = logRequest(containerRequestContext);

        //To further operations using requestContext

}

下面是我在同一个控制器类中记录请求的方法

private ContainerRequestContext logRequest(ContainerRequestContext requestContext) {

        JSONObject requestData = new JSONObject();
        try {

            Map bm = null;
            ContainerRequest cr = (ContainerRequest) requestContext;

            cr.bufferEntity();

            bm = cr.readEntity(Map.class);

            if (!String.valueOf(bm).equalsIgnoreCase("null")) {
                requestData.put("parameters", bm.toString());
            }

            requestData.put("uri", requestContext.getUriInfo().getRequestUri());
            requestData.put("ClientIp", requestContext.getProperty("requesterIp"));
            requestContext.setProperty("requestData", requestData);

        } catch (IOException | NumberFormatException | ProcessingException ex) {
            //Logging

        } catch (Exception ex) {
            //Logging
        }
        return requestContext;
    }

如您所见，我正在使用bufferEntity()多次读取ContainerRequestContext

当我在服务器上部署API时仍然如此

我面临着这个错误：

Error Trace : java.lang.IllegalStateException: Entity input stream has already been closed.

我在这里做错了什么。 如果有人能解释我的这种行为，我将不胜感激

Answer 1

我有一个类似的需求，我解决这个问题的方法是在Apache Commons的IOUtils的帮助下“克隆”请求实体，如下面的代码片段：

// - Create a new InputStream with the original entity  -//
ByteArrayOutputStream baos = new ByteArrayOutputStream();
IOUtils.copy(requestContext.getEntityStream(), baos);
InputStream originalEntity = new ByteArrayInputStream(baos.toByteArray()));

// - Reasign the original entity to Request Context  -//
requestContext.setEntityStream(new ByteArrayInputStream(baos.toByteArray()));

// - From this point onwards, you can do whatever you want with the original request entity  -//

. . .

// - In my case, I am working with JsonObject as below (try/catch ommited for brevity)  -//
JsonReader jsonReader = Json.createReader(originalEntity);
JsonObject requestEntity = jsonReader.readObject();

. . .