HTTP get with headers using RestTemplate

Question

How can I send a GET request using the Spring RestTemplate  Other questions have used POST  but I need to use GET  When I run this  the program continues to work  but it seems that the network is clogged because this is in an AsyncTask  and when I try to run another asynctask after I click on the button for this one  they won t work   I tried doing  String url    https   api blah com 2 0 search cubes w jdfkl amp whitespace 1    MultiValueMap lt String  String gt  map   new LinkedMultiValueMap lt String  String gt     map add  Bearer   accessToken    HttpHeaders headers   new HttpHeaders    headers setContentType MediaType APPLICATION FORM URLENCODED     copied this from somewhere else  not sure what its for  HttpEntity lt MultiValueMap lt String  String gt  gt  request   new HttpEntity lt MultiValueMap lt String  String gt  gt  map  headers    HttpMessageConverter lt String gt  stringConverter   new StringHttpMessageConverter    FormHttpMessageConverter formConverter   new FormHttpMessageConverter    List lt HttpMessageConverter lt   gt  gt  msgConverters   new ArrayList lt HttpMessageConverter lt   gt  gt       msgConverters add formConverter   msgConverters add new MappingJacksonHttpMessageConverter     msgConverters add stringConverter     template setMessageConverters msgConverters     SetSearchResponseData is my custom class to store the incoming JSON ResponseEntity lt SetSearchResponseData gt  result   template exchange url  HttpMethod GET  request  SetSearchResponseData class     If I was using post  i could have done SetSearchResponseDataresponse   restTemplate postForObject url  request  SetSearchResponseData class

User · Answer

Take a look at the JavaDoc for RestTemplate.

There is the corresponding getForObject methods that are the HTTP GET equivalents of postForObject, but they doesn't appear to fulfil your requirements of "GET with headers", as there is no way to specify headers on any of the calls.

Looking at the JavaDoc, no method that is HTTP GET specific allows you to also provide header information. There are alternatives though, one of which you have found and are using. The exchange methods allow you to provide an HttpEntity object representing the details of the request (including headers). The execute methods allow you to specify a RequestCallback from which you can add the headers upon its invocation.

User · Answer

The RestTemplate getForObject   method does not support setting headers  The solution is to use the exchange   method   So instead of restTemplate getForObject url  String class  param   which has no headers   use  HttpHeaders headers   new HttpHeaders    headers set  Header    value    headers set  Other-Header    othervalue         HttpEntity entity   new HttpEntity headers    ResponseEntity lt String gt  response   restTemplate exchange      url  HttpMethod GET  entity  String class  param     Finally  use response getBody   to get your result   This question is similar to this question

[spring] HTTP get with headers using RestTemplate

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