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javaspringcurlresttemplate

Curl Token request to Spring RestTemplate Conversion

I am trying to convert a curl request, which is giving me a token into Spring's Resttemplate post request, but I am getting 403 - bad request

My Curl Request

curl -d "grant_type=client_credentials&client_id=nu5yzeth9tektzf5egxuntp7&client_secret=uP2Xvr6SCKYgXgxxJsv2QkUG" 
  -H "Content-Type: application/x-www-form-urlencoded" 
  -X POST https://cloudsso.example.com/as/token.oauth2

Curl Response: 

{"access_token":"HVURQ845OPJqs8UpOlef5m2ZCNwR","token_type":"Bearer","expires_in":3599}

Now, Here is my Java code to implement above curl post request

RestTemplate restTemplate = new RestTemplate();
HttpHeaders headers = new HttpHeaders();
headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));

MultiValueMap<String, String> bodyParamMap = new LinkedMultiValueMap<String, String>();
bodyParamMap.add("grant_type", "client_credentials");
bodyParamMap.add("client_id", "nu5yzeth9tektzf5egxuntp7");
bodyParamMap.add("client_secret", "uP2Xvr6SCKYgXgxxJsv2QkUG");

entity = new HttpEntity<>(reqBodyData, bodyParamMap);

restTemplate.postForEntity(url, entity, TokenDTO.class)

Resttemplate call response: 

2019-12-04 11:10:16,483[0;39m [39mDEBUG[0;39m [[34mrestartedMain[0;39m] [33morg.springframework.core.log.CompositeLog[0;39m: Accept=[application/json, application/*+json]
[30m2019-12-04 11:10:16,484[0;39m [39mDEBUG[0;39m [[34mrestartedMain[0;39m] [33morg.springframework.core.log.CompositeLog[0;39m: Writing [{"grant_type":["client_credentials"],"client_id":["nu5yzeth9tektzf5egxuntp7"],"client_secret":["uP2Xvr6SCKYgXgxxJsv2QkUG"]}] with org.springframework.http.converter.StringHttpMessageConverter
[30m2019-12-04 11:10:17,976[0;39m [39mDEBUG[0;39m [[34mrestartedMain[0;39m] [33morg.springframework.core.log.CompositeLog[0;39m: Response 400 BAD_REQUEST
[30m2019-12-04 11:10:17,981[0;39m [34mINFO [0;39m [[34mrestartedMain[0;39m] [33mcom.ibm.ciscoApiIntegration.service.impl.CiscoAPIServiceImpl[0;39m: e::: 400 Bad Request

How can make the above curl request in RestTemplate working?

Note: https://cloudsso.example.com/as/token.oauth2 it's little modified for the question.

Solution

  • I have just solved the issue:

    I had this in this

    // wrong
//private HttpEntity<String> entity;

    I changed it to this:

    private MultiValueMap<String, String> parametersMap;

    and changed it

    // not working
entity = new HttpEntity<>(reqBodyData, bodyParamMap);

    to this

    // working
entity = new HttpEntity<>(bodyParamMap, headers);

    Now it's working perfectly fine.

    response:

    2019-12-04 11:52:46,503 DEBUG [restartedMain] org.springframework.core.log.CompositeLog: HTTP POST https://cloudsso.example.com/as/token.oauth2
2019-12-04 11:52:46,521 DEBUG [restartedMain] org.springframework.core.log.CompositeLog: Accept=[application/json, application/*+json]
2019-12-04 11:52:46,522 DEBUG [restartedMain] org.springframework.core.log.CompositeLog: Writing [{grant_type=[client_credentials], client_id=[nu5yzeth9tektzf5egxuntp7], client_secret=[uP2Xvr6SCKYgXgxxJsv2QkUG]}] with org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter
2019-12-04 11:52:47,831 DEBUG [restartedMain] org.springframework.core.log.CompositeLog: Response 200 OK

    Note: in my case, adding or disabling this value, isn't making any difference, i am getting the auth token anyway.

    //headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);