Spring RestTemplate，在解析为Json之前拦截响应 [英] Spring RestTemplate, intercepting response before parsing to Json

问题描述

我有一个REST api，它在主体内容中响应了一些其他非JSON数据.这中断了RestTemplate和jackson的使用.我可以在解析之前拦截http响应正文吗?

I have a REST api that responds with some additional non JSON data in the body content. This breaks the use of RestTemplate and jackson. Can I intercept the http response body prior to the parsing?

我正在使用RestTemplate.getForObject.

I am using RestTemplate.getForObject.

我看过RestTemplate，找不到合适的方法.

I've taken a look at the RestTemplate and couldn't see an appropriate method.

推荐答案

您可以尝试实现

You can try to implement ClientHttpRequestInterceptor and assign it to restTemplate. Implement intercept method:

@Override
public ClientHttpResponse intercept(HttpRequest httpRequest, byte[] bytes,
        ClientHttpRequestExecution clientHttpRequestExecution) throws IOException {

         ClientHttpResponse  response=clientHttpRequestExecution.execute(httpRequest, bytes);
         //...do magic with response body from getBody method
         return response;
}

您可能需要使用自己的实现扩展AbstractClientHttpResponse来实现.

You might have to extend AbstractClientHttpResponse with your own implementation to do that.

另一种选择是将来自REST API的响应视为字符串，然后根据需要设置字符串格式，并使用ObjectMapper明确将其映射到对象.

Another option could be to treat the response from the REST API as String, then format the string as needed and explicitly map it to object using ObjectMapper.

然后在您的restTemplate中，您将拥有:

Then in your restTemplate you would have:

 String result = restTemplate.getForObject(url, String.class, host);
 //..trim the extra stuff
 MyClass object=objectMapper.readValue(result, MyClass.class);

另一个选择是实现自己的HttpMessageConverter，该HttpMessageConverter扩展了AbstractJackson2HttpMessageConverter并将其注册到restTemplate.我认为从春季的角度来看这将是最清洁的生活

Yet another option would be to implement your own HttpMessageConverter which extends AbstractJackson2HttpMessageConverter and register it with restTemplate. In my opinion that would be the cleaneast from the Spring point of view

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