如何使Content-Type标头可选?

时间:2013-02-13 22:21:08

标签: java spring rest

我使用Spring REST服务实现了一个心跳API:

@RequestMapping(value = "heartbeat", method = RequestMethod.GET, consumes="application/json")
public ResponseEntity<String> getHeartBeat() throws Exception {
    String curr_time = myService.getCurrentTime();      
    return Util.getResponse(curr_time, HttpStatus.OK);
}

MyService.java有以下方法:

public String getCurrentTime() throws Exception {
    String currentDateTime = null;
    MyJson json = new MyJson();
    ObjectMapper mapper = new ObjectMapper().configure(SerializationConfig.Feature.DEFAULT_VIEW_INCLUSION, false);

    try {           
        Date currDate = new Date(System.currentTimeMillis());
        currentDateTime = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss").format(currDate);           
        json.setTime(currentDateTime);                      

        ObjectWriter writer = mapper.writerWithView(Views.HeartBeatApi.class);
        return writer.writeValueAsString(json);                 
    } catch (Exception e) {
        throw new Exception("Excpetion", HttpStatus.BAD_REQUEST);           
    }
}

它按预期工作但有两个问题:

  1. 当我调用此API时,Content-Type标头是必需的&amp;我想知道如何使这个标题可选。

  2. 如何添加“接受”标题,以便它可以支持其他格式,例如Google Protobuf?

  3. 谢谢!

1 个答案:

答案 0 :(得分:1)

如果您不希望要求Content-Type存在并且是“application / json”,则可以完全省略使用部分。

“接受”可通过“产生”值获得,而不是“消耗”。因此,如果您想支持Google Protobuf OR application / json,您可以这样做:

@Controller
@RequestMapping(value = "/pets/{petId}", method = RequestMethod.GET, produces="application/json")
@ResponseBody
public ResponseEntity<String> getHeartBeat() throws Exception {
    String curr_time = myService.getCurrentTime();      
    return Util.getResponse(curr_time, HttpStatus.OK);
}