How to make an https request?

Question

I should make a request to the address and send json, json I have in the form of a model

public class RequestToPlanfix {
    private String cmd;
    private String providerId;
    private String channel;
    private String chatId;
    private String planfix_token;
    private String message;
    private String title;
    private String contactId;
    private String contactName;
    private String contactLastName;
    private String contactIco;
    private String contactEmail;
    private String contactPhone;
    private String contactData;
    @Convert(converter = Attachments.class)
    private Map<String,String> name;
    @Convert(converter = Attachments.class)
    private Map<String,String> url;
    private Boolean isEcho;
}

that is, I should send json via https whose fields match the fields of this entity, how can I get and translate this entity into json? How can I make an https request further?

then I will receive the answer in the form of json, the fields of which are the fields of the next entity

that is, I will get json and I should do it parse

public class RequestFromPlanfix {
    private String cmd;
    private String providerId;
    private String chatId;
    private String contactPhone;
    private String channel;
    private String token;
    private String message;
    private String userName;
    private String userLastName;
    private String userIco;
    private String taskEmail;
    @Convert(converter = Attachments.class)
    private Map<String,String> name;
    @Convert(converter = Attachments.class)
    private Map<String,String> url;
}

the fields in two cases are different in some places, so I created two entities, then when we send the request we will send the first json, and when we receive the answer the second json, I cannot understand how to make the request and associate the json with the entity, thank you

   String postUrl = "www.site.com";
    Gson gson = new Gson();
    HttpClient httpClient = HttpClientBuilder.create().build();
    HttpPost post = new HttpPost(postUrl);
    StringEntity postingString = new StringEntity(gson.toJson(requestToPlanfix));//gson.tojson() converts your pojo to json
    post.setEntity(postingString);
    post.setHeader("Content-type", "application/json");
    HttpResponse response = httpClient.execute(post);

Answer 1

So you need to make a HTTP POST call.

And as it is explained your request body looks like RequestToPlanfix.java and your expected Response will be like RequestFromPlanfix.java.

Furthermore, you're using GSON for transformation.

Now I'll advise you to re-define your models (RequestToPlanfix.java & RequestFromPlanfix.java) as :

• Go to : http://www.jsonschema2pojo.org/

• Paste your JSON request first and choose GSON, Java and any additional field you think is valid.

• Then Generate your Plain Old Java Objects from there.
• This way we're sure nothing wrong in our JSON - JAVA understanding.
• Likewise, based on response JSON you're expecting, generate your RequestFromPlanfix.java.
• Replace your existing POJOs with the ones generated above.

Now , lets make the HTTP call using Spring's RestTemplate :

public class MakeRestCall {

  @Autowired
  private RestTemplate restTemplate;

  public void getResponse(){

      String postUrl = "www.site.com";

      // get your request object ready
      RequestToPlanfix requestObject = getRequestObject();

      // initialize HttpEntity 
      HttpEntity<RequestToPlanfix> httpEntity = new HttpEntity<>(requestObject);
      ResponseEntity<RequestFromPlanfix> response = restTemplate.exchange(postUrl, HttpMethod.POST, httpEntity, RequestFromPlanfix.class);
      RequestFromPlanfix responseObject = response.getBody();
      // carry-on with your other stuff
    }

Hope this helps.

Answer 2

You can use RestTemplate.

Something like:

@Test 
public void test() throws URISyntaxException {
    RestTemplate restTemplate = new RestTemplate();

    final String baseUrl = "https://your_url!";
    final URI uri = new URI(baseUrl);

    final RequestToPlanfix requestToPlanfix = new RequestToPlanfix();
    // set fields here to requestToPlanfix 

    final ResponseEntity<RequestFromPlanfix> result = restTemplate.postForEntity(uri, requestToPlanfix, String.class);

    // your response 
    final RequestFromPlanfix requestFromPlanfix = result.getBody();

    //Verify request succeed
    Assert.assertEquals(200, result.getStatusCodeValue()); 
 }

Other examples you can find here