How do I read the response header from RestTemplate?
I am posting information to a web service using RestTemplate.postForObject. Besides the result string I need the information in the response header. Is there any way to get this?
RestTemplate tem开发者_StackOverflowplate = new RestTemplate();
String result = template.postForObject(url, request, String.class);
Ok, I finally figured it out. The exchange method is exactly what i need. It returns an HttpEntity which contains the full headers.
RestTemplate template = new RestTemplate();
HttpEntity<String> response = template.exchange(url, HttpMethod.POST, request, String.class);
String resultString = response.getBody();
HttpHeaders headers = response.getHeaders();
Best thing to do whould be to use the execute method and pass in a ResponseExtractor which will have access to the headers.
private static class StringFromHeadersExtractor implements ResponseExtractor<String> {
public String extractData(ClientHttpResponse response) throws
{
return doSomthingWithHeader(response.getHeaders());
}
}
Another option (less clean) is to extend RestTemplate and override the call to doExecute
and add any special header handling logic there.
HttpEntity<?> entity = new HttpEntity<>( postObject, headers ); // for request
HttpEntity<String> response = template.exchange(url, HttpMethod.POST, entity, String.class);
String result= response.getBody();
HttpHeaders headers = response.getHeaders();
I don't know if this is the recommended method, but it looks like you could extract information from the response headers if you configure the template to use a custom HttpMessageConverter
.
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