Spring Boot RestTemplate WebClient - Response Body JSON Empty - spring-boot

Question

I am using Rest Template and have used Web Client as well. I get the key in response but the body is empty always. Using Postman I can see the Response which is a JSON.
My code snippet is below -
HttpHeaders headers = new HttpHeaders();
headers.setBasicAuth("john", "doe");
HttpEntity<String> request = new HttpEntity<String>(headers);
ResponseEntity<String> response = restTemplate.exchange(
"https://www.getMeData.com",
HttpMethod.GET, request, String.class);
System.out.println(response.getBody());
Response is as below -
{"result":[]}
Has anyone faced the same issue?
In Postman the Response Headers I can see is -
KEY VALUE
Content-Encoding gzip
Content-Type application/json;charset=UTF-8
Transfer-Encoding chunked

Answer 1

I just changed the Restemplate exchange method parameter from String url to new URI("url") and it worked.
ResponseEntity<String> response = restTemplate.exchange(new URI("https://www.getMeData.com"),
HttpMethod.GET, request, String.class);

Answer 2

Try to add headers as below:
HttpHeaders headers = new HttpHeaders();
headers.setBasicAuth("john", "doe");
headers.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<String> request = new HttpEntity<String>(headers);
For gZip - use
Gzip is disabled by default, check whether it's enabled on your application. If not enable Gzip with properties
server.compression.enabled=true
server.compression.mime-types=text/html,text/xml,text/plain,text/css,text/javascript,application/javascript,application/json
server.compression.min-response-size=1024
And add below encoding to test
headers.add(HttpHeaders.CONTENT_ENCODING, "gzip");
headers.add(HttpHeaders.ACCEPT_ENCODING, "gzip");
You can also try with creating a new Http message convertor and add the same to RestTemplate instance before invoking remote api call..

Answer 3

Spring implementation simply does not support it.
From the HTTP 1.1 2014 Spec:
A payload within a GET request message has no defined semantics;
sending a payload body on a GET request might cause some existing
implementations to reject the request.
Having that stated this is how you should refactor your code to make it work:
ResponseEntity<String> response = restTemplate.exchange(
"https://www.getMeData.com",
HttpMethod.POST, // <- this is it
request, String.class);
If you have no control over controller method layout - switch to python + requests library to have this done.