BadRequest 400 while trying to call a external API using POST RestTemplate

Question

I have to call an external API in Java Spring in which I have to pass a JSON object as follows( XXX and YYY are parameters ).How can I pass this JSON object using the following classes?

{
  "codecConfigId": "XXXXXXXX", 
  "inputStreams": [{
    "inputId": "Input_Teste_1024_1",
    "inputPath": "YYYYYYYYYYYYY",
    "selectionMode": "AUTO"
  }]
}

What I tried


StreamsForCodecs streams = new StreamsForCodecs();
streams.setCodecConfigId(codecConfigId);
streams.setInputStream(path.toString());

MultiValueMap<String, String> headers = new LinkedMultiValueMap<String, String>();
HashMap<String, String> map = new HashMap<String, String>();
map.put("Content-Type", "application/json");
map.put("x-api-key", "XXXXXXX");
map.put("Accept", "application/json");

The StreamsForCodecs is a class that has another class linked to that because I need to pass the above JSON, so I created those 2 classes.

public class StreamsForCodecs implements Serializable {

    private static final long serialVersionUID = 1L;
    private String codecConfigId;
    ArrayList<InputStreamsCodec> inputStreams = new ArrayList<InputStreamsCodec>();

...
    // Setter Methods

    public void setCodecConfigId(String codecConfigId) {
        this.codecConfigId = codecConfigId;
    }

    public void setInputStream(String path) {
        InputStreamsCodec inputStreamsCodec = new InputStreamsCodec();
        inputStreamsCodec.setInputPath(path);
        inputStreams.add(inputStreamsCodec);
    }

}

class InputStreamsCodec implements Serializable {

    private static final long serialVersionUID = 1L;
    private String inputPath;
...
Some GetAndSetters

    public void setInputPath(String inputPath) {
        this.inputPath = inputPath;
    }
}

I also tried requestEntity, request, RestTemplate.postForEntity and RestTemplate.exchange,but in all the scenarios I got the bad request.When I try to call this from POSTman, I didn't get the error.

HttpEntity<StreamsForCodecs> requestEntity = new HttpEntity(streams, headers);
request = new HttpEntity(requestEntity, headers);
ResponseEntity<StreamsForCodecsResponse> response= new RestTemplate().exchange(url, HttpMethod.POST, requestEntity, StreamsForCodecsResponse.class);
//ResponseEntity<StreamsForCodecsResponse> response= new //RestTemplate().postForEntity(url, request, StreamsForCodecsResponse.class);
System.out.println(response.getBody());

Here is s part of the stack trace of the exception.

org.springframework.web.client.HttpClientErrorException$BadRequest: 400 Bad Request
    at org.springframework.web.client.HttpClientErrorException.create(HttpClientErrorException.java:79) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:122) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:102) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.client.ResponseErrorHandler.handleError(ResponseErrorHandler.java:63) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:778) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:736) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:670) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:579) ~[spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE]
    at com.carlosdv93.controller.CreateStreamsForCodecs.createStreamsForCodecsPOST(CreateStreamsForCodecs.java:42) ~[classes/:na]

Fullstack Guy · Answer 1 · 2019-09-04T12:00:54.033

0

You are not sending the correct http headers, you put all the correct headers in the map object but never sent it, change your code and populate the headers object instead of the map nad send it with the request:

MultiValueMap<String, String> headers = new LinkedMultiValueMap<String, String>();
headers.add("Content-Type", "application/json");
headers.add("x-api-key", "XXXXXXX");
headers.add("Accept", "application/json");

Alternatively you can also use the HttpHeaders to set the headers:

HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType. APPLICATION_JSON);
headers.set("x-api-key", "XXXXXXX");
headers.setAccept(Collections.singletonList(MediaType.APPLICATION_JSON));
HttpEntity<StreamsForCodecs> requestEntity = new HttpEntity<>(streams, headers);
ResponseEntity<StreamsForCodecsResponse> response = new RestTemplate().exchange(url, HttpMethod.POST, requestEntity, StreamsForCodecsResponse.class);

edited Sep 04 '19 at 12:00

answered Sep 04 '19 at 11:15

Fullstack Guy

16,368
3
29
44

I did what you said, but didn't work. `MultiValueMap headers = new LinkedMultiValueMap(); headers.add("Content-Type", "application/json"); headers.add("x-api-key", "XXXXXXX"); headers.add("Accept", "application/json"); ` and send it, continues the 400 BadRequest. – CarlosDv93Dev Sep 04 '19 at 11:37
I edited my comment @Fullstack Guy but is the same bad request error – CarlosDv93Dev Sep 04 '19 at 11:39
@CarlosDv93Dev try using the `HttpHeaders`, the way I showed. – Fullstack Guy Sep 04 '19 at 11:51
@ CarlosDv93Dev just check if you have jackson in your classpath – Fullstack Guy Sep 04 '19 at 12:35
I did that changes, but still don't work, same error. I have the Jackson core dependency in my pom.xml – CarlosDv93Dev Sep 05 '19 at 00:43

score 0 · Answer 2 · answered Sep 04 '19 at 12:23

I guess you are not converting your Object to JSON.

    JSONObject requestJson = new JSONObject(streams).toString();
    HttpEntity<StreamsForCodecs> requestEntity = new HttpEntity<>(requestJson , headers);

Hope this will help Use HttpHeaders and HttPEntity as mentioned by fullstack guy

BadRequest 400 while trying to call a external API using POST RestTemplate

2 Answers2